/* clang-format off */
#[modes]
mode_color =
mode_color_instancing = \n#define USE_INSTANCING
mode_depth = #define MODE_RENDER_DEPTH
mode_depth_instancing = #define MODE_RENDER_DEPTH \n#define USE_INSTANCING
#[specializations]
DISABLE_LIGHTMAP = false
DISABLE_LIGHT_DIRECTIONAL = false
DISABLE_LIGHT_OMNI = false
DISABLE_LIGHT_SPOT = false
DISABLE_REFLECTION_PROBE = true
DISABLE_FOG = false
USE_DEPTH_FOG = false
USE_RADIANCE_MAP = true
USE_LIGHTMAP = false
USE_SH_LIGHTMAP = false
USE_LIGHTMAP_CAPTURE = false
USE_MULTIVIEW = false
RENDER_SHADOWS = false
RENDER_SHADOWS_LINEAR = false
SHADOW_MODE_PCF_5 = false
SHADOW_MODE_PCF_13 = false
LIGHT_USE_PSSM2 = false
LIGHT_USE_PSSM4 = false
LIGHT_USE_PSSM_BLEND = false
BASE_PASS = true
USE_ADDITIVE_LIGHTING = false
APPLY_TONEMAPPING = true
// We can only use one type of light per additive pass. This means that if USE_ADDITIVE_LIGHTING is defined, and
// these are false, we are doing a directional light pass.
ADDITIVE_OMNI = false
ADDITIVE_SPOT = false
RENDER_MATERIAL = false
SECOND_REFLECTION_PROBE = false
LIGHTMAP_BICUBIC_FILTER = false
#[vertex]
#define M_PI 3.14159265359
#define SHADER_IS_SRGB true
#define SHADER_SPACE_FAR -1.0
#include "stdlib_inc.glsl"
#if !defined(MODE_RENDER_DEPTH) || defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED) ||defined(LIGHT_CLEARCOAT_USED)
#ifndef NORMAL_USED
#define NORMAL_USED
#endif
#endif
#ifdef MODE_UNSHADED
#ifdef USE_ADDITIVE_LIGHTING
#undef USE_ADDITIVE_LIGHTING
#endif
#endif // MODE_UNSHADED
/*
from RenderingServer:
ARRAY_VERTEX = 0, // RGB32F or RGBA16
ARRAY_NORMAL = 1, // RG16 octahedral compression or RGBA16 normal + angle
ARRAY_TANGENT = 2, // RG16 octahedral compression, sign stored in sign of G
ARRAY_COLOR = 3, // RGBA8
ARRAY_TEX_UV = 4, // RG32F
ARRAY_TEX_UV2 = 5, // RG32F
ARRAY_CUSTOM0 = 6, // Depends on ArrayCustomFormat.
ARRAY_CUSTOM1 = 7,
ARRAY_CUSTOM2 = 8,
ARRAY_CUSTOM3 = 9,
ARRAY_BONES = 10, // RGBA16UI (x2 if 8 weights)
ARRAY_WEIGHTS = 11, // RGBA16UNORM (x2 if 8 weights)
*/
/* INPUT ATTRIBS */
// Always contains vertex position in XYZ, can contain tangent angle in W.
layout(location = 0) in highp vec4 vertex_angle_attrib;
/* clang-format on */
#ifdef NORMAL_USED
// Contains Normal/Axis in RG, can contain tangent in BA.
layout(location = 1) in vec4 axis_tangent_attrib;
#endif
// location 2 is unused.
#if defined(COLOR_USED)
layout(location = 3) in vec4 color_attrib;
#endif
#ifdef UV_USED
layout(location = 4) in vec2 uv_attrib;
#endif
#if defined(UV2_USED) || defined(USE_LIGHTMAP) || defined(RENDER_MATERIAL)
layout(location = 5) in vec2 uv2_attrib;
#endif
#if defined(CUSTOM0_USED)
layout(location = 6) in vec4 custom0_attrib;
#endif
#if defined(CUSTOM1_USED)
layout(location = 7) in vec4 custom1_attrib;
#endif
#if defined(CUSTOM2_USED)
layout(location = 8) in vec4 custom2_attrib;
#endif
#if defined(CUSTOM3_USED)
layout(location = 9) in vec4 custom3_attrib;
#endif
#if defined(BONES_USED)
layout(location = 10) in uvec4 bone_attrib;
#endif
#if defined(WEIGHTS_USED)
layout(location = 11) in vec4 weight_attrib;
#endif
vec3 oct_to_vec3(vec2 e) {
vec3 v = vec3(e.xy, 1.0 - abs(e.x) - abs(e.y));
float t = max(-v.z, 0.0);
v.xy += t * -sign(v.xy);
return normalize(v);
}
void axis_angle_to_tbn(vec3 axis, float angle, out vec3 tangent, out vec3 binormal, out vec3 normal) {
float c = cos(angle);
float s = sin(angle);
vec3 omc_axis = (1.0 - c) * axis;
vec3 s_axis = s * axis;
tangent = omc_axis.xxx * axis + vec3(c, -s_axis.z, s_axis.y);
binormal = omc_axis.yyy * axis + vec3(s_axis.z, c, -s_axis.x);
normal = omc_axis.zzz * axis + vec3(-s_axis.y, s_axis.x, c);
}
#ifdef USE_INSTANCING
layout(location = 12) in highp vec4 instance_xform0;
layout(location = 13) in highp vec4 instance_xform1;
layout(location = 14) in highp vec4 instance_xform2;
layout(location = 15) in highp uvec4 instance_color_custom_data; // Color packed into xy, Custom data into zw.
#endif
#define FLAGS_NON_UNIFORM_SCALE (1 << 4)
layout(std140) uniform GlobalShaderUniformData { //ubo:1
vec4 global_shader_uniforms[MAX_GLOBAL_SHADER_UNIFORMS];
};
layout(std140) uniform SceneData { // ubo:2
highp mat4 projection_matrix;
highp mat4 inv_projection_matrix;
highp mat4 inv_view_matrix;
highp mat4 view_matrix;
// Used for billboards to cast correct shadows.
highp mat4 main_cam_inv_view_matrix;
vec2 viewport_size;
vec2 screen_pixel_size;
mediump vec4 ambient_light_color_energy;
mediump float ambient_color_sky_mix;
float pad2;
float emissive_exposure_normalization;
bool use_ambient_light;
bool use_ambient_cubemap;
bool use_reflection_cubemap;
float fog_aerial_perspective;
float time;
mat3 radiance_inverse_xform;
uint directional_light_count;
float z_far;
float z_near;
float IBL_exposure_normalization;
bool fog_enabled;
uint fog_mode;
float fog_density;
float fog_height;
float fog_height_density;
float fog_depth_curve;
float fog_sun_scatter;
float fog_depth_begin;
vec3 fog_light_color;
float fog_depth_end;
float shadow_bias;
float luminance_multiplier;
uint camera_visible_layers;
bool pancake_shadows;
}
scene_data;
#ifdef USE_ADDITIVE_LIGHTING
#if defined(ADDITIVE_OMNI) || defined(ADDITIVE_SPOT)
struct PositionalShadowData {
highp mat4 shadow_matrix;
highp vec3 light_position;
highp float shadow_normal_bias;
vec3 pad;
highp float shadow_atlas_pixel_size;
};
layout(std140) uniform PositionalShadows { // ubo:9
PositionalShadowData positional_shadows[MAX_LIGHT_DATA_STRUCTS];
};
uniform lowp uint positional_shadow_index;
#else // ADDITIVE_DIRECTIONAL
struct DirectionalShadowData {
highp vec3 direction;
highp float shadow_atlas_pixel_size;
highp vec4 shadow_normal_bias;
highp vec4 shadow_split_offsets;
highp mat4 shadow_matrix1;
highp mat4 shadow_matrix2;
highp mat4 shadow_matrix3;
highp mat4 shadow_matrix4;
mediump float fade_from;
mediump float fade_to;
mediump vec2 pad;
};
layout(std140) uniform DirectionalShadows { // ubo:10
DirectionalShadowData directional_shadows[MAX_DIRECTIONAL_LIGHT_DATA_STRUCTS];
};
uniform lowp uint directional_shadow_index;
#endif // !(defined(ADDITIVE_OMNI) || defined(ADDITIVE_SPOT))
#endif // USE_ADDITIVE_LIGHTING
#ifdef USE_VERTEX_LIGHTING
out vec3 diffuse_light_interp;
out vec3 specular_light_interp;
#ifdef USE_ADDITIVE_LIGHTING
out vec3 additive_diffuse_light_interp;
out vec3 additive_specular_light_interp;
#endif // USE_ADDITIVE_LIGHTING
// Directional light data.
#if !defined(DISABLE_LIGHT_DIRECTIONAL) || (!defined(ADDITIVE_OMNI) && !defined(ADDITIVE_SPOT) && defined(USE_ADDITIVE_LIGHTING))
struct DirectionalLightData {
mediump vec3 direction;
mediump float energy;
mediump vec3 color;
mediump float size;
lowp uint unused;
lowp uint bake_mode;
mediump float shadow_opacity;
mediump float specular;
};
layout(std140) uniform DirectionalLights { // ubo:7
DirectionalLightData directional_lights[MAX_DIRECTIONAL_LIGHT_DATA_STRUCTS];
};
#endif // !DISABLE_LIGHT_DIRECTIONAL
// Omni and spot light data.
#if !defined(DISABLE_LIGHT_OMNI) || !defined(DISABLE_LIGHT_SPOT) || (defined(ADDITIVE_OMNI) || defined(ADDITIVE_SPOT) && defined(USE_ADDITIVE_LIGHTING))
struct LightData { // This structure needs to be as packed as possible.
highp vec3 position;
highp float inv_radius;
mediump vec3 direction;
highp float size;
mediump vec3 color;
mediump float attenuation;
mediump float cone_attenuation;
mediump float cone_angle;
mediump float specular_amount;
mediump float shadow_opacity;
lowp vec3 pad;
lowp uint bake_mode;
};
#if !defined(DISABLE_LIGHT_OMNI) || defined(ADDITIVE_OMNI)
layout(std140) uniform OmniLightData { // ubo:5
LightData omni_lights[MAX_LIGHT_DATA_STRUCTS];
};
#ifdef BASE_PASS
uniform uint omni_light_indices[MAX_FORWARD_LIGHTS];
uniform uint omni_light_count;
#endif // BASE_PASS
#endif // DISABLE_LIGHT_OMNI
#if !defined(DISABLE_LIGHT_SPOT) || defined(ADDITIVE_SPOT)
layout(std140) uniform SpotLightData { // ubo:6
LightData spot_lights[MAX_LIGHT_DATA_STRUCTS];
};
#ifdef BASE_PASS
uniform uint spot_light_indices[MAX_FORWARD_LIGHTS];
uniform uint spot_light_count;
#endif // BASE_PASS
#endif // DISABLE_LIGHT_SPOT
#endif // !defined(DISABLE_LIGHT_OMNI) || !defined(DISABLE_LIGHT_SPOT) || (defined(ADDITIVE_OMNI) || defined(ADDITIVE_SPOT) && defined(USE_ADDITIVE_LIGHTING))
#ifdef USE_ADDITIVE_LIGHTING
#ifdef ADDITIVE_OMNI
uniform lowp uint omni_light_index;
#endif
#ifdef ADDITIVE_SPOT
uniform lowp uint spot_light_index;
#endif
#endif // USE_ADDITIVE_LIGHTING
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && defined(USE_VERTEX_LIGHTING)
// Eyeballed approximation of `exp2(15.0 * (1.0 - roughness) + 1.0) * 0.25`.
// Uses slightly more FMA instructions (2x rate) to avoid special instructions (0.25x rate).
// Range is reduced to [0.64,4977] from [068,2,221,528] which makes mediump feasible for the rest of the shader.
mediump float roughness_to_shininess(mediump float roughness) {
mediump float r = 1.2 - roughness;
mediump float r2 = r * r;
return r * r2 * r2 * 2000.0;
}
void light_compute(vec3 N, vec3 L, vec3 V, vec3 light_color, bool is_directional, float roughness,
inout vec3 diffuse_light, inout vec3 specular_light) {
float NdotL = min(dot(N, L), 1.0);
float cNdotL = max(NdotL, 0.0); // clamped NdotL
#if defined(DIFFUSE_LAMBERT_WRAP)
// Energy conserving lambert wrap shader.
// https://web.archive.org/web/20210228210901/http://blog.stevemcauley.com/2011/12/03/energy-conserving-wrapped-diffuse/
float diffuse_brdf_NL = max(0.0, (cNdotL + roughness) / ((1.0 + roughness) * (1.0 + roughness))) * (1.0 / M_PI);
#else
// lambert
float diffuse_brdf_NL = cNdotL * (1.0 / M_PI);
#endif
diffuse_light += light_color * diffuse_brdf_NL;
#if !defined(SPECULAR_DISABLED)
float specular_brdf_NL = 0.0;
// Normalized blinn always unless disabled.
vec3 H = normalize(V + L);
float cNdotH = clamp(dot(N, H), 0.0, 1.0);
float shininess = roughness_to_shininess(roughness);
float blinn = pow(cNdotH, shininess);
blinn *= (shininess + 2.0) * (1.0 / (8.0 * M_PI)) * cNdotL;
specular_brdf_NL = blinn;
specular_light += specular_brdf_NL * light_color;
#endif
}
float get_omni_spot_attenuation(float distance, float inv_range, float decay) {
float nd = distance * inv_range;
nd *= nd;
nd *= nd; // nd^4
nd = max(1.0 - nd, 0.0);
nd *= nd; // nd^2
return nd * pow(max(distance, 0.0001), -decay);
}
#if !defined(DISABLE_LIGHT_OMNI) || (defined(ADDITIVE_OMNI) && defined(USE_ADDITIVE_LIGHTING))
void light_process_omni(uint idx, vec3 vertex, vec3 eye_vec, vec3 normal, float roughness,
inout vec3 diffuse_light, inout vec3 specular_light) {
vec3 light_rel_vec = omni_lights[idx].position - vertex;
float light_length = length(light_rel_vec);
float omni_attenuation = get_omni_spot_attenuation(light_length, omni_lights[idx].inv_radius, omni_lights[idx].attenuation);
vec3 color = omni_lights[idx].color * omni_attenuation; // No light shaders here, so combine.
light_compute(normal, normalize(light_rel_vec), eye_vec, color, false, roughness,
diffuse_light,
specular_light);
}
#endif // !defined(DISABLE_LIGHT_OMNI) || (defined(ADDITIVE_OMNI) && defined(USE_ADDITIVE_LIGHTING))
#if !defined(DISABLE_LIGHT_SPOT) || (defined(ADDITIVE_SPOT) && defined(USE_ADDITIVE_LIGHTING))
void light_process_spot(uint idx, vec3 vertex, vec3 eye_vec, vec3 normal, float roughness,
inout vec3 diffuse_light,
inout vec3 specular_light) {
vec3 light_rel_vec = spot_lights[idx].position - vertex;
float light_length = length(light_rel_vec);
float spot_attenuation = get_omni_spot_attenuation(light_length, spot_lights[idx].inv_radius, spot_lights[idx].attenuation);
vec3 spot_dir = spot_lights[idx].direction;
float scos = max(dot(-normalize(light_rel_vec), spot_dir), spot_lights[idx].cone_angle);
float spot_rim = max(0.0001, (1.0 - scos) / (1.0 - spot_lights[idx].cone_angle));
mediump float cone_attenuation = spot_lights[idx].cone_attenuation;
spot_attenuation *= 1.0 - pow(spot_rim, cone_attenuation);
vec3 color = spot_lights[idx].color * spot_attenuation;
light_compute(normal, normalize(light_rel_vec), eye_vec, color, false, roughness,
diffuse_light, specular_light);
}
#endif // !defined(DISABLE_LIGHT_SPOT) || (defined(ADDITIVE_SPOT) && defined(USE_ADDITIVE_LIGHTING))
#endif // !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && defined(USE_VERTEX_LIGHTING)
#endif // USE_VERTEX_LIGHTING
#ifdef USE_MULTIVIEW
layout(std140) uniform MultiviewData { // ubo:8
highp mat4 projection_matrix_view[MAX_VIEWS];
highp mat4 inv_projection_matrix_view[MAX_VIEWS];
highp vec4 eye_offset[MAX_VIEWS];
}
multiview_data;
#endif
uniform highp mat4 world_transform;
uniform highp vec3 compressed_aabb_position;
uniform highp vec3 compressed_aabb_size;
uniform highp vec4 uv_scale;
uniform highp uint instance_offset;
uniform highp uint model_flags;
#ifdef RENDER_MATERIAL
uniform mediump vec2 uv_offset;
#endif
/* Varyings */
out highp vec3 vertex_interp;
#ifdef NORMAL_USED
out vec3 normal_interp;
#endif
#if defined(COLOR_USED)
out vec4 color_interp;
#endif
#if defined(UV_USED)
out vec2 uv_interp;
#endif
#if defined(UV2_USED) || defined(USE_LIGHTMAP)
out vec2 uv2_interp;
#endif
#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
out vec3 tangent_interp;
out vec3 binormal_interp;
#endif
#ifdef USE_ADDITIVE_LIGHTING
out highp vec4 shadow_coord;
#if defined(LIGHT_USE_PSSM2) || defined(LIGHT_USE_PSSM4)
out highp vec4 shadow_coord2;
#endif
#ifdef LIGHT_USE_PSSM4
out highp vec4 shadow_coord3;
out highp vec4 shadow_coord4;
#endif //LIGHT_USE_PSSM4
#endif
#ifdef MATERIAL_UNIFORMS_USED
/* clang-format off */
layout(std140) uniform MaterialUniforms { // ubo:3
#MATERIAL_UNIFORMS
};
/* clang-format on */
#endif
/* clang-format off */
#GLOBALS
/* clang-format on */
invariant gl_Position;
void main() {
highp vec3 vertex = vertex_angle_attrib.xyz * compressed_aabb_size + compressed_aabb_position;
highp mat4 model_matrix = world_transform;
#ifdef USE_INSTANCING
highp mat4 m = mat4(instance_xform0, instance_xform1, instance_xform2, vec4(0.0, 0.0, 0.0, 1.0));
model_matrix = model_matrix * transpose(m);
#endif
#ifdef NORMAL_USED
vec3 normal = oct_to_vec3(axis_tangent_attrib.xy * 2.0 - 1.0);
#endif
highp mat3 model_normal_matrix;
if (bool(model_flags & uint(FLAGS_NON_UNIFORM_SCALE))) {
model_normal_matrix = transpose(inverse(mat3(model_matrix)));
} else {
model_normal_matrix = mat3(model_matrix);
}
#if defined(NORMAL_USED) || defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
vec3 binormal;
float binormal_sign;
vec3 tangent;
if (axis_tangent_attrib.z > 0.0 || axis_tangent_attrib.w < 1.0) {
// Uncompressed format.
vec2 signed_tangent_attrib = axis_tangent_attrib.zw * 2.0 - 1.0;
tangent = oct_to_vec3(vec2(signed_tangent_attrib.x, abs(signed_tangent_attrib.y) * 2.0 - 1.0));
binormal_sign = sign(signed_tangent_attrib.y);
binormal = normalize(cross(normal, tangent) * binormal_sign);
} else {
// Compressed format.
float angle = vertex_angle_attrib.w;
binormal_sign = angle > 0.5 ? 1.0 : -1.0; // 0.5 does not exist in UNORM16, so values are either greater or smaller.
angle = abs(angle * 2.0 - 1.0) * M_PI; // 0.5 is basically zero, allowing to encode both signs reliably.
vec3 axis = normal;
axis_angle_to_tbn(axis, angle, tangent, binormal, normal);
binormal *= binormal_sign;
}
#endif
#if defined(COLOR_USED)
color_interp = color_attrib;
#ifdef USE_INSTANCING
vec4 instance_color;
instance_color.xy = unpackHalf2x16(instance_color_custom_data.x);
instance_color.zw = unpackHalf2x16(instance_color_custom_data.y);
color_interp *= instance_color;
#endif
#endif
#if defined(UV_USED)
uv_interp = uv_attrib;
#endif
#if defined(UV2_USED) || defined(USE_LIGHTMAP)
uv2_interp = uv2_attrib;
#endif
if (uv_scale != vec4(0.0)) { // Compression enabled
#ifdef UV_USED
uv_interp = (uv_interp - 0.5) * uv_scale.xy;
#endif
#if defined(UV2_USED) || defined(USE_LIGHTMAP)
uv2_interp = (uv2_interp - 0.5) * uv_scale.zw;
#endif
}
#if defined(OVERRIDE_POSITION)
highp vec4 position;
#endif
#ifdef USE_MULTIVIEW
mat4 projection_matrix = multiview_data.projection_matrix_view[ViewIndex];
mat4 inv_projection_matrix = multiview_data.inv_projection_matrix_view[ViewIndex];
vec3 eye_offset = multiview_data.eye_offset[ViewIndex].xyz;
#else
mat4 projection_matrix = scene_data.projection_matrix;
mat4 inv_projection_matrix = scene_data.inv_projection_matrix;
vec3 eye_offset = vec3(0.0, 0.0, 0.0);
#endif //USE_MULTIVIEW
#ifdef USE_INSTANCING
vec4 instance_custom;
instance_custom.xy = unpackHalf2x16(instance_color_custom_data.z);
instance_custom.zw = unpackHalf2x16(instance_color_custom_data.w);
#else
vec4 instance_custom = vec4(0.0);
#endif
// Using world coordinates
#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED)
vertex = (model_matrix * vec4(vertex, 1.0)).xyz;
#ifdef NORMAL_USED
normal = model_normal_matrix * normal;
#endif
#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
tangent = model_normal_matrix * tangent;
binormal = model_normal_matrix * binormal;
#endif
#endif
float roughness = 1.0;
highp mat4 modelview = scene_data.view_matrix * model_matrix;
highp mat3 modelview_normal = mat3(scene_data.view_matrix) * model_normal_matrix;
float point_size = 1.0;
{
#CODE : VERTEX
}
gl_PointSize = point_size;
// Using local coordinates (default)
#if !defined(SKIP_TRANSFORM_USED) && !defined(VERTEX_WORLD_COORDS_USED)
vertex = (modelview * vec4(vertex, 1.0)).xyz;
#ifdef NORMAL_USED
normal = modelview_normal * normal;
#endif
#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
binormal = modelview_normal * binormal;
tangent = modelview_normal * tangent;
#endif
#endif // !defined(SKIP_TRANSFORM_USED) && !defined(VERTEX_WORLD_COORDS_USED)
// Using world coordinates
#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED)
vertex = (scene_data.view_matrix * vec4(vertex, 1.0)).xyz;
#ifdef NORMAL_USED
normal = (scene_data.view_matrix * vec4(normal, 0.0)).xyz;
#endif
#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
binormal = (scene_data.view_matrix * vec4(binormal, 0.0)).xyz;
tangent = (scene_data.view_matrix * vec4(tangent, 0.0)).xyz;
#endif
#endif
vertex_interp = vertex;
#ifdef NORMAL_USED
normal_interp = normal;
#endif
#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
tangent_interp = tangent;
binormal_interp = binormal;
#endif
// Calculate shadows.
#ifdef USE_ADDITIVE_LIGHTING
#if defined(ADDITIVE_OMNI) || defined(ADDITIVE_SPOT)
// Apply normal bias at draw time to avoid issues with scaling non-fused geometry.
vec3 light_rel_vec = positional_shadows[positional_shadow_index].light_position - vertex_interp;
float light_length = length(light_rel_vec);
float aNdotL = abs(dot(normalize(normal_interp), normalize(light_rel_vec)));
vec3 normal_offset = (1.0 - aNdotL) * positional_shadows[positional_shadow_index].shadow_normal_bias * light_length * normal_interp;
#ifdef ADDITIVE_SPOT
// Calculate coord here so we can take advantage of prefetch.
shadow_coord = positional_shadows[positional_shadow_index].shadow_matrix * vec4(vertex_interp + normal_offset, 1.0);
#endif
#ifdef ADDITIVE_OMNI
// Can't interpolate unit direction nicely, so forget about prefetch.
shadow_coord = vec4(vertex_interp + normal_offset, 1.0);
#endif
#else // ADDITIVE_DIRECTIONAL
vec3 base_normal_bias = normalize(normal_interp) * (1.0 - max(0.0, dot(directional_shadows[directional_shadow_index].direction, -normalize(normal_interp))));
vec3 normal_offset = base_normal_bias * directional_shadows[directional_shadow_index].shadow_normal_bias.x;
shadow_coord = directional_shadows[directional_shadow_index].shadow_matrix1 * vec4(vertex_interp + normal_offset, 1.0);
#if defined(LIGHT_USE_PSSM2) || defined(LIGHT_USE_PSSM4)
normal_offset = base_normal_bias * directional_shadows[directional_shadow_index].shadow_normal_bias.y;
shadow_coord2 = directional_shadows[directional_shadow_index].shadow_matrix2 * vec4(vertex_interp + normal_offset, 1.0);
#endif
#ifdef LIGHT_USE_PSSM4
normal_offset = base_normal_bias * directional_shadows[directional_shadow_index].shadow_normal_bias.z;
shadow_coord3 = directional_shadows[directional_shadow_index].shadow_matrix3 * vec4(vertex_interp + normal_offset, 1.0);
normal_offset = base_normal_bias * directional_shadows[directional_shadow_index].shadow_normal_bias.w;
shadow_coord4 = directional_shadows[directional_shadow_index].shadow_matrix4 * vec4(vertex_interp + normal_offset, 1.0);
#endif //LIGHT_USE_PSSM4
#endif // !(defined(ADDITIVE_OMNI) || defined(ADDITIVE_SPOT))
#endif // USE_ADDITIVE_LIGHTING
#if defined(RENDER_SHADOWS) && !defined(RENDER_SHADOWS_LINEAR)
// This is an optimized version of normalize(vertex_interp) * scene_data.shadow_bias / length(vertex_interp).
float light_length_sq = dot(vertex_interp, vertex_interp);
vertex_interp += vertex_interp * scene_data.shadow_bias / light_length_sq;
#endif
#if defined(OVERRIDE_POSITION)
gl_Position = position;
#else
gl_Position = projection_matrix * vec4(vertex_interp, 1.0);
#endif
#ifdef RENDER_MATERIAL
gl_Position.xy = (uv2_attrib.xy + uv_offset) * 2.0 - 1.0;
gl_Position.z = 0.00001;
gl_Position.w = 1.0;
#endif
#ifdef USE_VERTEX_LIGHTING
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
#ifdef USE_MULTIVIEW
vec3 view = -normalize(vertex_interp - eye_offset);
#else
vec3 view = -normalize(vertex_interp);
#endif
diffuse_light_interp = vec3(0.0);
specular_light_interp = vec3(0.0);
#ifdef BASE_PASS
#ifndef DISABLE_LIGHT_DIRECTIONAL
for (uint i = uint(0); i < scene_data.directional_light_count; i++) {
light_compute(normal_interp, normalize(directional_lights[i].direction), normalize(view), directional_lights[i].color * directional_lights[i].energy, true, roughness,
diffuse_light_interp.rgb,
specular_light_interp.rgb);
}
#endif // !DISABLE_LIGHT_DIRECTIONAL
#ifndef DISABLE_LIGHT_OMNI
for (uint i = 0u; i < omni_light_count; i++) {
light_process_omni(omni_light_indices[i], vertex_interp, view, normal_interp, roughness,
diffuse_light_interp.rgb, specular_light_interp.rgb);
}
#endif // !DISABLE_LIGHT_OMNI
#ifndef DISABLE_LIGHT_SPOT
for (uint i = 0u; i < spot_light_count; i++) {
light_process_spot(spot_light_indices[i], vertex_interp, view, normal_interp, roughness,
diffuse_light_interp.rgb, specular_light_interp.rgb);
}
#endif // !DISABLE_LIGHT_SPOT
#endif // BASE_PASS
/* ADDITIVE LIGHTING PASS */
#ifdef USE_ADDITIVE_LIGHTING
additive_diffuse_light_interp = vec3(0.0);
additive_specular_light_interp = vec3(0.0);
#if !defined(ADDITIVE_OMNI) && !defined(ADDITIVE_SPOT)
light_compute(normal_interp, normalize(directional_lights[directional_shadow_index].direction), normalize(view), directional_lights[directional_shadow_index].color * directional_lights[directional_shadow_index].energy, true, roughness,
additive_diffuse_light_interp.rgb,
additive_specular_light_interp.rgb);
#endif // !defined(ADDITIVE_OMNI) && !defined(ADDITIVE_SPOT)
#ifdef ADDITIVE_OMNI
light_process_omni(omni_light_index, vertex_interp, view, normal_interp, roughness,
additive_diffuse_light_interp.rgb, additive_specular_light_interp.rgb);
#endif // ADDITIVE_OMNI
#ifdef ADDITIVE_SPOT
light_process_spot(spot_light_index, vertex_interp, view, normal_interp, roughness,
additive_diffuse_light_interp.rgb, additive_specular_light_interp.rgb);
#endif // ADDITIVE_SPOT
#endif // USE_ADDITIVE_LIGHTING
#endif // !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
#endif // USE_VERTEX_LIGHTING
}
/* clang-format off */
#[fragment]
// Default to SPECULAR_SCHLICK_GGX.
#if !defined(SPECULAR_DISABLED) && !defined(SPECULAR_SCHLICK_GGX) && !defined(SPECULAR_TOON)
#define SPECULAR_SCHLICK_GGX
#endif
#if !defined(MODE_RENDER_DEPTH) || defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED) ||defined(LIGHT_CLEARCOAT_USED)
#ifndef NORMAL_USED
#define NORMAL_USED
#endif
#endif
#ifdef MODE_UNSHADED
#ifdef USE_ADDITIVE_LIGHTING
#undef USE_ADDITIVE_LIGHTING
#endif
#endif // MODE_UNSHADED
#ifndef MODE_RENDER_DEPTH
#include "tonemap_inc.glsl"
#endif
#include "stdlib_inc.glsl"
/* texture unit usage, N is max_texture_unit-N
1-color correction // In tonemap_inc.glsl
2-radiance
3-shadow
4-lightmap textures
5-screen
6-depth
7-reflection probe 1
8-reflection probe 2
*/
#define M_PI 3.14159265359
/* clang-format on */
#define SHADER_IS_SRGB true
#define SHADER_SPACE_FAR -1.0
#define FLAGS_NON_UNIFORM_SCALE (1 << 4)
/* Varyings */
#if defined(COLOR_USED)
in vec4 color_interp;
#endif
#if defined(UV_USED)
in vec2 uv_interp;
#endif
#if defined(UV2_USED)
in vec2 uv2_interp;
#else
#ifdef USE_LIGHTMAP
in vec2 uv2_interp;
#endif
#endif
#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
in vec3 tangent_interp;
in vec3 binormal_interp;
#endif
#ifdef NORMAL_USED
in vec3 normal_interp;
#endif
in highp vec3 vertex_interp;
#ifdef USE_ADDITIVE_LIGHTING
in highp vec4 shadow_coord;
#if defined(LIGHT_USE_PSSM2) || defined(LIGHT_USE_PSSM4)
in highp vec4 shadow_coord2;
#endif
#ifdef LIGHT_USE_PSSM4
in highp vec4 shadow_coord3;
in highp vec4 shadow_coord4;
#endif //LIGHT_USE_PSSM4
#endif
#ifdef USE_RADIANCE_MAP
#define RADIANCE_MAX_LOD 5.0
uniform samplerCube radiance_map; // texunit:-2
#endif // USE_RADIANCE_MAP
#ifndef DISABLE_REFLECTION_PROBE
#define REFLECTION_PROBE_MAX_LOD 8.0
uniform bool refprobe1_use_box_project;
uniform highp vec3 refprobe1_box_extents;
uniform vec3 refprobe1_box_offset;
uniform highp mat4 refprobe1_local_matrix;
uniform bool refprobe1_exterior;
uniform float refprobe1_intensity;
uniform int refprobe1_ambient_mode;
uniform vec4 refprobe1_ambient_color;
uniform samplerCube refprobe1_texture; // texunit:-7
#ifdef SECOND_REFLECTION_PROBE
uniform bool refprobe2_use_box_project;
uniform highp vec3 refprobe2_box_extents;
uniform vec3 refprobe2_box_offset;
uniform highp mat4 refprobe2_local_matrix;
uniform bool refprobe2_exterior;
uniform float refprobe2_intensity;
uniform int refprobe2_ambient_mode;
uniform vec4 refprobe2_ambient_color;
uniform samplerCube refprobe2_texture; // texunit:-8
#endif // SECOND_REFLECTION_PROBE
#endif // DISABLE_REFLECTION_PROBE
layout(std140) uniform GlobalShaderUniformData { //ubo:1
vec4 global_shader_uniforms[MAX_GLOBAL_SHADER_UNIFORMS];
};
/* Material Uniforms */
#ifdef MATERIAL_UNIFORMS_USED
/* clang-format off */
layout(std140) uniform MaterialUniforms { // ubo:3
#MATERIAL_UNIFORMS
};
/* clang-format on */
#endif
layout(std140) uniform SceneData { // ubo:2
highp mat4 projection_matrix;
highp mat4 inv_projection_matrix;
highp mat4 inv_view_matrix;
highp mat4 view_matrix;
// Used for billboards to cast correct shadows.
highp mat4 main_cam_inv_view_matrix;
vec2 viewport_size;
vec2 screen_pixel_size;
mediump vec4 ambient_light_color_energy;
mediump float ambient_color_sky_mix;
float pad2;
float emissive_exposure_normalization;
bool use_ambient_light;
bool use_ambient_cubemap;
bool use_reflection_cubemap;
float fog_aerial_perspective;
float time;
mat3 radiance_inverse_xform;
uint directional_light_count;
float z_far;
float z_near;
float IBL_exposure_normalization;
bool fog_enabled;
uint fog_mode;
float fog_density;
float fog_height;
float fog_height_density;
float fog_depth_curve;
float fog_sun_scatter;
float fog_depth_begin;
vec3 fog_light_color;
float fog_depth_end;
float shadow_bias;
float luminance_multiplier;
uint camera_visible_layers;
bool pancake_shadows;
}
scene_data;
#ifdef USE_MULTIVIEW
layout(std140) uniform MultiviewData { // ubo:8
highp mat4 projection_matrix_view[MAX_VIEWS];
highp mat4 inv_projection_matrix_view[MAX_VIEWS];
highp vec4 eye_offset[MAX_VIEWS];
}
multiview_data;
#endif
/* clang-format off */
#GLOBALS
/* clang-format on */
#define LIGHT_BAKE_DISABLED 0u
#define LIGHT_BAKE_STATIC 1u
#define LIGHT_BAKE_DYNAMIC 2u
#ifndef MODE_RENDER_DEPTH
#ifdef USE_VERTEX_LIGHTING
in vec3 diffuse_light_interp;
in vec3 specular_light_interp;
#ifdef USE_ADDITIVE_LIGHTING
in vec3 additive_diffuse_light_interp;
in vec3 additive_specular_light_interp;
#endif // USE_ADDITIVE_LIGHTING
#endif // USE_VERTEX_LIGHTING
// Directional light data.
#if !defined(DISABLE_LIGHT_DIRECTIONAL) || (!defined(ADDITIVE_OMNI) && !defined(ADDITIVE_SPOT))
struct DirectionalLightData {
mediump vec3 direction;
mediump float energy;
mediump vec3 color;
mediump float size;
lowp uint unused;
lowp uint bake_mode;
mediump float shadow_opacity;
mediump float specular;
};
layout(std140) uniform DirectionalLights { // ubo:7
DirectionalLightData directional_lights[MAX_DIRECTIONAL_LIGHT_DATA_STRUCTS];
};
#if defined(USE_ADDITIVE_LIGHTING) && (!defined(ADDITIVE_OMNI) && !defined(ADDITIVE_SPOT))
// Directional shadows can be in the base pass or in the additive passes
uniform highp sampler2DShadow directional_shadow_atlas; // texunit:-3
#endif // defined(USE_ADDITIVE_LIGHTING) && (!defined(ADDITIVE_OMNI) && !defined(ADDITIVE_SPOT))
#endif // !DISABLE_LIGHT_DIRECTIONAL
// Omni and spot light data.
#if !defined(DISABLE_LIGHT_OMNI) || !defined(DISABLE_LIGHT_SPOT) || defined(ADDITIVE_OMNI) || defined(ADDITIVE_SPOT)
struct LightData { // This structure needs to be as packed as possible.
highp vec3 position;
highp float inv_radius;
mediump vec3 direction;
highp float size;
mediump vec3 color;
mediump float attenuation;
mediump float cone_attenuation;
mediump float cone_angle;
mediump float specular_amount;
mediump float shadow_opacity;
lowp vec3 pad;
lowp uint bake_mode;
};
#if !defined(DISABLE_LIGHT_OMNI) || defined(ADDITIVE_OMNI)
layout(std140) uniform OmniLightData { // ubo:5
LightData omni_lights[MAX_LIGHT_DATA_STRUCTS];
};
#if defined(BASE_PASS) && !defined(USE_VERTEX_LIGHTING)
uniform uint omni_light_indices[MAX_FORWARD_LIGHTS];
uniform uint omni_light_count;
#endif // defined(BASE_PASS) && !defined(USE_VERTEX_LIGHTING)
#endif // !defined(DISABLE_LIGHT_OMNI) || defined(ADDITIVE_OMNI)
#if !defined(DISABLE_LIGHT_SPOT) || defined(ADDITIVE_SPOT)
layout(std140) uniform SpotLightData { // ubo:6
LightData spot_lights[MAX_LIGHT_DATA_STRUCTS];
};
#if defined(BASE_PASS) && !defined(USE_VERTEX_LIGHTING)
uniform uint spot_light_indices[MAX_FORWARD_LIGHTS];
uniform uint spot_light_count;
#endif // defined(BASE_PASS) && !defined(USE_VERTEX_LIGHTING)
#endif // !defined(DISABLE_LIGHT_SPOT) || defined(ADDITIVE_SPOT)
#endif // !defined(DISABLE_LIGHT_OMNI) || !defined(DISABLE_LIGHT_SPOT) || defined(ADDITIVE_OMNI) || defined(ADDITIVE_SPOT)
#ifdef USE_ADDITIVE_LIGHTING
#ifdef ADDITIVE_OMNI
uniform highp samplerCubeShadow omni_shadow_texture; // texunit:-3
uniform lowp uint omni_light_index;
#endif
#ifdef ADDITIVE_SPOT
uniform highp sampler2DShadow spot_shadow_texture; // texunit:-3
uniform lowp uint spot_light_index;
#endif
#if defined(ADDITIVE_OMNI) || defined(ADDITIVE_SPOT)
struct PositionalShadowData {
highp mat4 shadow_matrix;
highp vec3 light_position;
highp float shadow_normal_bias;
vec3 pad;
highp float shadow_atlas_pixel_size;
};
layout(std140) uniform PositionalShadows { // ubo:9
PositionalShadowData positional_shadows[MAX_LIGHT_DATA_STRUCTS];
};
uniform lowp uint positional_shadow_index;
#else // ADDITIVE_DIRECTIONAL
struct DirectionalShadowData {
highp vec3 direction;
highp float shadow_atlas_pixel_size;
highp vec4 shadow_normal_bias;
highp vec4 shadow_split_offsets;
highp mat4 shadow_matrix1;
highp mat4 shadow_matrix2;
highp mat4 shadow_matrix3;
highp mat4 shadow_matrix4;
mediump float fade_from;
mediump float fade_to;
mediump vec2 pad;
};
layout(std140) uniform DirectionalShadows { // ubo:10
DirectionalShadowData directional_shadows[MAX_DIRECTIONAL_LIGHT_DATA_STRUCTS];
};
uniform lowp uint directional_shadow_index;
#endif // !(defined(ADDITIVE_OMNI) || defined(ADDITIVE_SPOT))
#if !defined(ADDITIVE_OMNI)
float sample_shadow(highp sampler2DShadow shadow, float shadow_pixel_size, vec4 pos) {
// Use textureProjLod with LOD set to 0.0 over textureProj, as textureProj not working correctly on ANGLE with Metal backend.
// https://github.com/godotengine/godot/issues/93537
float avg = textureProjLod(shadow, pos, 0.0);
#ifdef SHADOW_MODE_PCF_13
pos /= pos.w;
avg += textureProjLod(shadow, vec4(pos.xy + vec2(shadow_pixel_size * 2.0, 0.0), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(-shadow_pixel_size * 2.0, 0.0), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(0.0, shadow_pixel_size * 2.0), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(0.0, -shadow_pixel_size * 2.0), pos.zw), 0.0);
// Early bail if distant samples are fully shaded (or none are shaded) to improve performance.
if (avg <= 0.000001) {
// None shaded at all.
return 0.0;
} else if (avg >= 4.999999) {
// All fully shaded.
return 1.0;
}
avg += textureProjLod(shadow, vec4(pos.xy + vec2(shadow_pixel_size, 0.0), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(-shadow_pixel_size, 0.0), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(0.0, shadow_pixel_size), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(0.0, -shadow_pixel_size), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(shadow_pixel_size, shadow_pixel_size), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(-shadow_pixel_size, shadow_pixel_size), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(shadow_pixel_size, -shadow_pixel_size), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(-shadow_pixel_size, -shadow_pixel_size), pos.zw), 0.0);
return avg * (1.0 / 13.0);
#endif
#ifdef SHADOW_MODE_PCF_5
pos /= pos.w;
avg += textureProjLod(shadow, vec4(pos.xy + vec2(shadow_pixel_size, 0.0), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(-shadow_pixel_size, 0.0), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(0.0, shadow_pixel_size), pos.zw), 0.0);
avg += textureProjLod(shadow, vec4(pos.xy + vec2(0.0, -shadow_pixel_size), pos.zw), 0.0);
return avg * (1.0 / 5.0);
#endif
return avg;
}
#endif //!defined(ADDITIVE_OMNI)
#endif // USE_ADDITIVE_LIGHTING
#endif // !MODE_RENDER_DEPTH
#ifndef DISABLE_LIGHTMAP
#ifdef USE_LIGHTMAP
uniform mediump sampler2DArray lightmap_textures; //texunit:-4
uniform lowp uint lightmap_slice;
uniform highp vec4 lightmap_uv_scale;
uniform float lightmap_exposure_normalization;
#ifdef LIGHTMAP_BICUBIC_FILTER
uniform highp vec2 lightmap_texture_size;
#endif
#ifdef USE_SH_LIGHTMAP
uniform mediump mat3 lightmap_normal_xform;
#endif // USE_SH_LIGHTMAP
#endif // USE_LIGHTMAP
#ifdef USE_LIGHTMAP_CAPTURE
uniform mediump vec4[9] lightmap_captures;
#endif // USE_LIGHTMAP_CAPTURE
#endif // !DISABLE_LIGHTMAP
#ifdef USE_MULTIVIEW
uniform highp sampler2DArray depth_buffer; // texunit:-6
uniform highp sampler2DArray color_buffer; // texunit:-5
vec3 multiview_uv(vec2 uv) {
return vec3(uv, ViewIndex);
}
ivec3 multiview_uv(ivec2 uv) {
return ivec3(uv, int(ViewIndex));
}
#else
uniform highp sampler2D depth_buffer; // texunit:-6
uniform highp sampler2D color_buffer; // texunit:-5
vec2 multiview_uv(vec2 uv) {
return uv;
}
ivec2 multiview_uv(ivec2 uv) {
return uv;
}
#endif
uniform highp mat4 world_transform;
uniform mediump float opaque_prepass_threshold;
uniform highp uint model_flags;
uniform highp uint instance_offset;
#if defined(RENDER_MATERIAL)
layout(location = 0) out vec4 albedo_output_buffer;
layout(location = 1) out vec4 normal_output_buffer;
layout(location = 2) out vec4 orm_output_buffer;
layout(location = 3) out vec4 emission_output_buffer;
#else // !RENDER_MATERIAL
// Normal color rendering.
layout(location = 0) out vec4 frag_color;
#endif // !RENDER_MATERIAL
vec3 F0(float metallic, float specular, vec3 albedo) {
float dielectric = 0.16 * specular * specular;
// use albedo * metallic as colored specular reflectance at 0 angle for metallic materials;
// see https://google.github.io/filament/Filament.md.html
return mix(vec3(dielectric), albedo, vec3(metallic));
}
#ifndef MODE_RENDER_DEPTH
#ifndef USE_VERTEX_LIGHTING
#if !defined(DISABLE_LIGHT_DIRECTIONAL) || !defined(DISABLE_LIGHT_OMNI) || !defined(DISABLE_LIGHT_SPOT) || defined(USE_ADDITIVE_LIGHTING)
float D_GGX(float cos_theta_m, float alpha) {
float a = cos_theta_m * alpha;
float k = alpha / (1.0 - cos_theta_m * cos_theta_m + a * a);
return k * k * (1.0 / M_PI);
}
// From Earl Hammon, Jr. "PBR Diffuse Lighting for GGX+Smith Microsurfaces" https://www.gdcvault.com/play/1024478/PBR-Diffuse-Lighting-for-GGX
float V_GGX(float NdotL, float NdotV, float alpha) {
return 0.5 / mix(2.0 * NdotL * NdotV, NdotL + NdotV, alpha);
}
float D_GGX_anisotropic(float cos_theta_m, float alpha_x, float alpha_y, float cos_phi, float sin_phi) {
float alpha2 = alpha_x * alpha_y;
highp vec3 v = vec3(alpha_y * cos_phi, alpha_x * sin_phi, alpha2 * cos_theta_m);
highp float v2 = dot(v, v);
float w2 = alpha2 / v2;
float D = alpha2 * w2 * w2 * (1.0 / M_PI);
return D;
}
float V_GGX_anisotropic(float alpha_x, float alpha_y, float TdotV, float TdotL, float BdotV, float BdotL, float NdotV, float NdotL) {
float Lambda_V = NdotL * length(vec3(alpha_x * TdotV, alpha_y * BdotV, NdotV));
float Lambda_L = NdotV * length(vec3(alpha_x * TdotL, alpha_y * BdotL, NdotL));
return 0.5 / (Lambda_V + Lambda_L);
}
float SchlickFresnel(float u) {
float m = 1.0 - u;
float m2 = m * m;
return m2 * m2 * m; // pow(m,5)
}
void light_compute(vec3 N, vec3 L, vec3 V, float A, vec3 light_color, bool is_directional, float attenuation, vec3 f0, float roughness, float metallic, float specular_amount, vec3 albedo, inout float alpha,
#ifdef LIGHT_BACKLIGHT_USED
vec3 backlight,
#endif
#ifdef LIGHT_RIM_USED
float rim, float rim_tint,
#endif
#ifdef LIGHT_CLEARCOAT_USED
float clearcoat, float clearcoat_roughness, vec3 vertex_normal,
#endif
#ifdef LIGHT_ANISOTROPY_USED
vec3 B, vec3 T, float anisotropy,
#endif
inout vec3 diffuse_light, inout vec3 specular_light) {
#if defined(LIGHT_CODE_USED)
// light is written by the light shader
highp mat4 model_matrix = world_transform;
mat4 projection_matrix = scene_data.projection_matrix;
mat4 inv_projection_matrix = scene_data.inv_projection_matrix;
vec3 normal = N;
vec3 light = L;
vec3 view = V;
/* clang-format off */
#CODE : LIGHT
/* clang-format on */
#else
float NdotL = min(A + dot(N, L), 1.0);
float cNdotL = max(NdotL, 0.0); // clamped NdotL
float NdotV = dot(N, V);
float cNdotV = max(NdotV, 1e-4);
#if defined(DIFFUSE_BURLEY) || defined(SPECULAR_SCHLICK_GGX) || defined(LIGHT_CLEARCOAT_USED)
vec3 H = normalize(V + L);
#endif
#if defined(SPECULAR_SCHLICK_GGX)
float cNdotH = clamp(A + dot(N, H), 0.0, 1.0);
#endif
#if defined(DIFFUSE_BURLEY) || defined(SPECULAR_SCHLICK_GGX) || defined(LIGHT_CLEARCOAT_USED)
float cLdotH = clamp(A + dot(L, H), 0.0, 1.0);
#endif
if (metallic < 1.0) {
float diffuse_brdf_NL; // BRDF times N.L for calculating diffuse radiance
#if defined(DIFFUSE_LAMBERT_WRAP)
// Energy conserving lambert wrap shader.
// https://web.archive.org/web/20210228210901/http://blog.stevemcauley.com/2011/12/03/energy-conserving-wrapped-diffuse/
diffuse_brdf_NL = max(0.0, (NdotL + roughness) / ((1.0 + roughness) * (1.0 + roughness))) * (1.0 / M_PI);
#elif defined(DIFFUSE_TOON)
diffuse_brdf_NL = smoothstep(-roughness, max(roughness, 0.01), NdotL) * (1.0 / M_PI);
#elif defined(DIFFUSE_BURLEY)
{
float FD90_minus_1 = 2.0 * cLdotH * cLdotH * roughness - 0.5;
float FdV = 1.0 + FD90_minus_1 * SchlickFresnel(cNdotV);
float FdL = 1.0 + FD90_minus_1 * SchlickFresnel(cNdotL);
diffuse_brdf_NL = (1.0 / M_PI) * FdV * FdL * cNdotL;
}
#else
// Lambert
diffuse_brdf_NL = cNdotL * (1.0 / M_PI);
#endif
diffuse_light += light_color * diffuse_brdf_NL * attenuation;
#if defined(LIGHT_BACKLIGHT_USED)
diffuse_light += light_color * (vec3(1.0 / M_PI) - diffuse_brdf_NL) * backlight * attenuation;
#endif
#if defined(LIGHT_RIM_USED)
// Epsilon min to prevent pow(0, 0) singularity which results in undefined behavior.
float rim_light = pow(max(1e-4, 1.0 - cNdotV), max(0.0, (1.0 - roughness) * 16.0));
diffuse_light += rim_light * rim * mix(vec3(1.0), albedo, rim_tint) * light_color;
#endif
}
if (roughness > 0.0) { // FIXME: roughness == 0 should not disable specular light entirely
// D
#if defined(SPECULAR_TOON)
vec3 R = normalize(-reflect(L, N));
float RdotV = dot(R, V);
float mid = 1.0 - roughness;
mid *= mid;
float intensity = smoothstep(mid - roughness * 0.5, mid + roughness * 0.5, RdotV) * mid;
diffuse_light += light_color * intensity * attenuation * specular_amount; // write to diffuse_light, as in toon shading you generally want no reflection
#elif defined(SPECULAR_DISABLED)
// none..
#elif defined(SPECULAR_SCHLICK_GGX)
// shlick+ggx as default
float alpha_ggx = roughness * roughness;
#if defined(LIGHT_ANISOTROPY_USED)
float aspect = sqrt(1.0 - anisotropy * 0.9);
float ax = alpha_ggx / aspect;
float ay = alpha_ggx * aspect;
float XdotH = dot(T, H);
float YdotH = dot(B, H);
float D = D_GGX_anisotropic(cNdotH, ax, ay, XdotH, YdotH);
float G = V_GGX_anisotropic(ax, ay, dot(T, V), dot(T, L), dot(B, V), dot(B, L), cNdotV, cNdotL);
#else
float D = D_GGX(cNdotH, alpha_ggx);
float G = V_GGX(cNdotL, cNdotV, alpha_ggx);
#endif // LIGHT_ANISOTROPY_USED
// F
float cLdotH5 = SchlickFresnel(cLdotH);
// Calculate Fresnel using cheap approximate specular occlusion term from Filament:
// https://google.github.io/filament/Filament.html#lighting/occlusion/specularocclusion
float f90 = clamp(50.0 * f0.g, 0.0, 1.0);
vec3 F = f0 + (f90 - f0) * cLdotH5;
vec3 specular_brdf_NL = cNdotL * D * F * G;
specular_light += specular_brdf_NL * light_color * attenuation * specular_amount;
#endif
#if defined(LIGHT_CLEARCOAT_USED)
// Clearcoat ignores normal_map, use vertex normal instead
float ccNdotL = max(min(A + dot(vertex_normal, L), 1.0), 0.0);
float ccNdotH = clamp(A + dot(vertex_normal, H), 0.0, 1.0);
float ccNdotV = max(dot(vertex_normal, V), 1e-4);
#if !defined(SPECULAR_SCHLICK_GGX)
float cLdotH5 = SchlickFresnel(cLdotH);
#endif
float Dr = D_GGX(ccNdotH, mix(0.001, 0.1, clearcoat_roughness));
float Gr = 0.25 / (cLdotH * cLdotH);
float Fr = mix(.04, 1.0, cLdotH5);
float clearcoat_specular_brdf_NL = clearcoat * Gr * Fr * Dr * cNdotL;
specular_light += clearcoat_specular_brdf_NL * light_color * attenuation * specular_amount;
// TODO: Clearcoat adds light to the scene right now (it is non-energy conserving), both diffuse and specular need to be scaled by (1.0 - FR)
// but to do so we need to rearrange this entire function
#endif // LIGHT_CLEARCOAT_USED
}
#ifdef USE_SHADOW_TO_OPACITY
alpha = min(alpha, clamp(1.0 - attenuation, 0.0, 1.0));
#endif
#endif // LIGHT_CODE_USED
}
float get_omni_spot_attenuation(float distance, float inv_range, float decay) {
float nd = distance * inv_range;
nd *= nd;
nd *= nd; // nd^4
nd = max(1.0 - nd, 0.0);
nd *= nd; // nd^2
return nd * pow(max(distance, 0.0001), -decay);
}
#if !defined(DISABLE_LIGHT_OMNI) || defined(ADDITIVE_OMNI)
void light_process_omni(uint idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 f0, float roughness, float metallic, float shadow, vec3 albedo, inout float alpha,
#ifdef LIGHT_BACKLIGHT_USED
vec3 backlight,
#endif
#ifdef LIGHT_RIM_USED
float rim, float rim_tint,
#endif
#ifdef LIGHT_CLEARCOAT_USED
float clearcoat, float clearcoat_roughness, vec3 vertex_normal,
#endif
#ifdef LIGHT_ANISOTROPY_USED
vec3 binormal, vec3 tangent, float anisotropy,
#endif
inout vec3 diffuse_light, inout vec3 specular_light) {
vec3 light_rel_vec = omni_lights[idx].position - vertex;
float light_length = length(light_rel_vec);
float omni_attenuation = get_omni_spot_attenuation(light_length, omni_lights[idx].inv_radius, omni_lights[idx].attenuation);
vec3 color = omni_lights[idx].color;
float size_A = 0.0;
if (omni_lights[idx].size > 0.0) {
float t = omni_lights[idx].size / max(0.001, light_length);
size_A = max(0.0, 1.0 - 1.0 / sqrt(1.0 + t * t));
}
omni_attenuation *= shadow;
light_compute(normal, normalize(light_rel_vec), eye_vec, size_A, color, false, omni_attenuation, f0, roughness, metallic, omni_lights[idx].specular_amount, albedo, alpha,
#ifdef LIGHT_BACKLIGHT_USED
backlight,
#endif
#ifdef LIGHT_RIM_USED
rim * omni_attenuation, rim_tint,
#endif
#ifdef LIGHT_CLEARCOAT_USED
clearcoat, clearcoat_roughness, vertex_normal,
#endif
#ifdef LIGHT_ANISOTROPY_USED
binormal, tangent, anisotropy,
#endif
diffuse_light,
specular_light);
}
#endif // !DISABLE_LIGHT_OMNI
#if !defined(DISABLE_LIGHT_SPOT) || defined(ADDITIVE_SPOT)
void light_process_spot(uint idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 f0, float roughness, float metallic, float shadow, vec3 albedo, inout float alpha,
#ifdef LIGHT_BACKLIGHT_USED
vec3 backlight,
#endif
#ifdef LIGHT_RIM_USED
float rim, float rim_tint,
#endif
#ifdef LIGHT_CLEARCOAT_USED
float clearcoat, float clearcoat_roughness, vec3 vertex_normal,
#endif
#ifdef LIGHT_ANISOTROPY_USED
vec3 binormal, vec3 tangent, float anisotropy,
#endif
inout vec3 diffuse_light,
inout vec3 specular_light) {
vec3 light_rel_vec = spot_lights[idx].position - vertex;
float light_length = length(light_rel_vec);
float spot_attenuation = get_omni_spot_attenuation(light_length, spot_lights[idx].inv_radius, spot_lights[idx].attenuation);
vec3 spot_dir = spot_lights[idx].direction;
float scos = max(dot(-normalize(light_rel_vec), spot_dir), spot_lights[idx].cone_angle);
float spot_rim = max(0.0001, (1.0 - scos) / (1.0 - spot_lights[idx].cone_angle));
mediump float cone_attenuation = spot_lights[idx].cone_attenuation;
spot_attenuation *= 1.0 - pow(spot_rim, cone_attenuation);
vec3 color = spot_lights[idx].color;
float size_A = 0.0;
if (spot_lights[idx].size > 0.0) {
float t = spot_lights[idx].size / max(0.001, light_length);
size_A = max(0.0, 1.0 - 1.0 / sqrt(1.0 + t * t));
}
spot_attenuation *= shadow;
light_compute(normal, normalize(light_rel_vec), eye_vec, size_A, color, false, spot_attenuation, f0, roughness, metallic, spot_lights[idx].specular_amount, albedo, alpha,
#ifdef LIGHT_BACKLIGHT_USED
backlight,
#endif
#ifdef LIGHT_RIM_USED
rim * spot_attenuation, rim_tint,
#endif
#ifdef LIGHT_CLEARCOAT_USED
clearcoat, clearcoat_roughness, vertex_normal,
#endif
#ifdef LIGHT_ANISOTROPY_USED
binormal, tangent, anisotropy,
#endif
diffuse_light, specular_light);
}
#endif // !defined(DISABLE_LIGHT_SPOT) || defined(ADDITIVE_SPOT)
#endif // !defined(DISABLE_LIGHT_DIRECTIONAL) || !defined(DISABLE_LIGHT_OMNI) || !defined(DISABLE_LIGHT_SPOT)
#endif // !USE_VERTEX_LIGHTING
vec4 fog_process(vec3 vertex) {
vec3 fog_color = scene_data.fog_light_color;
#ifdef USE_RADIANCE_MAP
/*
if (scene_data.fog_aerial_perspective > 0.0) {
vec3 sky_fog_color = vec3(0.0);
vec3 cube_view = scene_data.radiance_inverse_xform * vertex;
// mip_level always reads from the second mipmap and higher so the fog is always slightly blurred
float mip_level = mix(1.0 / MAX_ROUGHNESS_LOD, 1.0, 1.0 - (abs(vertex.z) - scene_data.z_near) / (scene_data.z_far - scene_data.z_near));
sky_fog_color = textureLod(radiance_map, cube_view, mip_level * RADIANCE_MAX_LOD).rgb;
fog_color = mix(fog_color, sky_fog_color, scene_data.fog_aerial_perspective);
}
*/
#endif
#ifndef DISABLE_LIGHT_DIRECTIONAL
if (scene_data.fog_sun_scatter > 0.001) {
vec4 sun_scatter = vec4(0.0);
float sun_total = 0.0;
vec3 view = normalize(vertex);
for (uint i = uint(0); i < scene_data.directional_light_count; i++) {
vec3 light_color = directional_lights[i].color * directional_lights[i].energy;
float light_amount = pow(max(dot(view, directional_lights[i].direction), 0.0), 8.0);
fog_color += light_color * light_amount * scene_data.fog_sun_scatter;
}
}
#endif // !DISABLE_LIGHT_DIRECTIONAL
float fog_amount = 0.0;
#ifdef USE_DEPTH_FOG
float fog_z = smoothstep(scene_data.fog_depth_begin, scene_data.fog_depth_end, length(vertex));
fog_amount = pow(fog_z, scene_data.fog_depth_curve) * scene_data.fog_density;
#else
fog_amount = 1.0 - exp(min(0.0, -length(vertex) * scene_data.fog_density));
#endif // USE_DEPTH_FOG
if (abs(scene_data.fog_height_density) >= 0.0001) {
float y = (scene_data.inv_view_matrix * vec4(vertex, 1.0)).y;
float y_dist = y - scene_data.fog_height;
float vfog_amount = 1.0 - exp(min(0.0, y_dist * scene_data.fog_height_density));
fog_amount = max(vfog_amount, fog_amount);
}
return vec4(fog_color, fog_amount);
}
#ifndef DISABLE_REFLECTION_PROBE
#define REFLECTION_AMBIENT_DISABLED 0
#define REFLECTION_AMBIENT_ENVIRONMENT 1
#define REFLECTION_AMBIENT_COLOR 2
void reflection_process(samplerCube reflection_map,
vec3 normal, vec3 vertex,
mat4 local_matrix,
bool use_box_project, vec3 box_extents, vec3 box_offset,
bool exterior, float intensity, int ref_ambient_mode, vec4 ref_ambient_color,
float roughness, vec3 ambient, vec3 skybox,
inout highp vec4 reflection_accum, inout highp vec4 ambient_accum) {
vec4 reflection;
vec3 local_pos = (local_matrix * vec4(vertex, 1.0)).xyz;
if (any(greaterThan(abs(local_pos), box_extents))) { //out of the reflection box
return;
}
vec3 inner_pos = abs(local_pos / box_extents);
float blend = max(inner_pos.x, max(inner_pos.y, inner_pos.z));
blend = mix(length(inner_pos), blend, blend);
blend *= blend;
blend = max(0.0, 1.0 - blend);
//reflect and make local
vec3 ref_normal = normalize(reflect(vertex, normal));
ref_normal = (local_matrix * vec4(ref_normal, 0.0)).xyz;
if (use_box_project) { //box project
vec3 nrdir = normalize(ref_normal);
vec3 rbmax = (box_extents - local_pos) / nrdir;
vec3 rbmin = (-box_extents - local_pos) / nrdir;
vec3 rbminmax = mix(rbmin, rbmax, vec3(greaterThan(nrdir, vec3(0.0, 0.0, 0.0))));
float fa = min(min(rbminmax.x, rbminmax.y), rbminmax.z);
vec3 posonbox = local_pos + nrdir * fa;
ref_normal = posonbox - box_offset.xyz;
}
reflection.rgb = srgb_to_linear(textureLod(reflection_map, ref_normal, roughness * MAX_ROUGHNESS_LOD).rgb);
if (exterior) {
reflection.rgb = mix(skybox, reflection.rgb, blend);
}
reflection.rgb *= intensity;
reflection.a = blend;
reflection.rgb *= blend;
reflection_accum += reflection;
#ifndef USE_LIGHTMAP
if (ref_ambient_mode == REFLECTION_AMBIENT_ENVIRONMENT) {
vec4 ambient_out;
vec3 amb_normal = (local_matrix * vec4(normal, 0.0)).xyz;
ambient_out.rgb = srgb_to_linear(textureLod(reflection_map, amb_normal, MAX_ROUGHNESS_LOD).rgb);
if (exterior) {
ambient_out.rgb = mix(ambient, ambient_out.rgb, blend);
}
ambient_out.a = blend;
ambient_out.rgb *= blend;
ambient_accum += ambient_out;
} else if (ref_ambient_mode == REFLECTION_AMBIENT_COLOR) {
vec4 ambient_out;
ambient_out.rgb = ref_ambient_color.rgb;
if (exterior) {
ambient_out.rgb = mix(ambient, ambient_out.rgb, blend);
}
ambient_out.a = blend;
ambient_out.rgb *= blend;
ambient_accum += ambient_out;
}
#endif // USE_LIGHTMAP
}
#endif // DISABLE_REFLECTION_PROBE
#endif // !MODE_RENDER_DEPTH
#ifdef LIGHTMAP_BICUBIC_FILTER
// w0, w1, w2, and w3 are the four cubic B-spline basis functions
float w0(float a) {
return (1.0 / 6.0) * (a * (a * (-a + 3.0) - 3.0) + 1.0);
}
float w1(float a) {
return (1.0 / 6.0) * (a * a * (3.0 * a - 6.0) + 4.0);
}
float w2(float a) {
return (1.0 / 6.0) * (a * (a * (-3.0 * a + 3.0) + 3.0) + 1.0);
}
float w3(float a) {
return (1.0 / 6.0) * (a * a * a);
}
// g0 and g1 are the two amplitude functions
float g0(float a) {
return w0(a) + w1(a);
}
float g1(float a) {
return w2(a) + w3(a);
}
// h0 and h1 are the two offset functions
float h0(float a) {
return -1.0 + w1(a) / (w0(a) + w1(a));
}
float h1(float a) {
return 1.0 + w3(a) / (w2(a) + w3(a));
}
vec4 textureArray_bicubic(sampler2DArray tex, vec3 uv, vec2 texture_size) {
vec2 texel_size = vec2(1.0) / texture_size;
uv.xy = uv.xy * texture_size + vec2(0.5);
vec2 iuv = floor(uv.xy);
vec2 fuv = fract(uv.xy);
float g0x = g0(fuv.x);
float g1x = g1(fuv.x);
float h0x = h0(fuv.x);
float h1x = h1(fuv.x);
float h0y = h0(fuv.y);
float h1y = h1(fuv.y);
vec2 p0 = (vec2(iuv.x + h0x, iuv.y + h0y) - vec2(0.5)) * texel_size;
vec2 p1 = (vec2(iuv.x + h1x, iuv.y + h0y) - vec2(0.5)) * texel_size;
vec2 p2 = (vec2(iuv.x + h0x, iuv.y + h1y) - vec2(0.5)) * texel_size;
vec2 p3 = (vec2(iuv.x + h1x, iuv.y + h1y) - vec2(0.5)) * texel_size;
return (g0(fuv.y) * (g0x * texture(tex, vec3(p0, uv.z)) + g1x * texture(tex, vec3(p1, uv.z)))) +
(g1(fuv.y) * (g0x * texture(tex, vec3(p2, uv.z)) + g1x * texture(tex, vec3(p3, uv.z))));
}
#endif //LIGHTMAP_BICUBIC_FILTER
void main() {
//lay out everything, whatever is unused is optimized away anyway
vec3 vertex = vertex_interp;
#ifdef USE_MULTIVIEW
vec3 eye_offset = multiview_data.eye_offset[ViewIndex].xyz;
vec3 view = -normalize(vertex_interp - eye_offset);
mat4 projection_matrix = multiview_data.projection_matrix_view[ViewIndex];
mat4 inv_projection_matrix = multiview_data.inv_projection_matrix_view[ViewIndex];
#else
vec3 eye_offset = vec3(0.0, 0.0, 0.0);
vec3 view = -normalize(vertex_interp);
mat4 projection_matrix = scene_data.projection_matrix;
mat4 inv_projection_matrix = scene_data.inv_projection_matrix;
#endif
highp mat4 model_matrix = world_transform;
vec3 albedo = vec3(1.0);
vec3 backlight = vec3(0.0);
vec4 transmittance_color = vec4(0.0, 0.0, 0.0, 1.0);
float transmittance_depth = 0.0;
float transmittance_boost = 0.0;
float metallic = 0.0;
float specular = 0.5;
vec3 emission = vec3(0.0);
float roughness = 1.0;
float rim = 0.0;
float rim_tint = 0.0;
float clearcoat = 0.0;
float clearcoat_roughness = 0.0;
float anisotropy = 0.0;
vec2 anisotropy_flow = vec2(1.0, 0.0);
#ifdef PREMUL_ALPHA_USED
float premul_alpha = 1.0;
#endif // PREMUL_ALPHA_USED
#ifndef FOG_DISABLED
vec4 fog = vec4(0.0);
#endif // !FOG_DISABLED
#if defined(CUSTOM_RADIANCE_USED)
vec4 custom_radiance = vec4(0.0);
#endif
#if defined(CUSTOM_IRRADIANCE_USED)
vec4 custom_irradiance = vec4(0.0);
#endif
float ao = 1.0;
float ao_light_affect = 0.0;
float alpha = 1.0;
#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
vec3 binormal = normalize(binormal_interp);
vec3 tangent = normalize(tangent_interp);
#else
vec3 binormal = vec3(0.0);
vec3 tangent = vec3(0.0);
#endif
#ifdef NORMAL_USED
vec3 normal = normalize(normal_interp);
#if defined(DO_SIDE_CHECK)
if (!gl_FrontFacing) {
normal = -normal;
}
#endif
#endif //NORMAL_USED
#ifdef UV_USED
vec2 uv = uv_interp;
#endif
#if defined(UV2_USED) || defined(USE_LIGHTMAP)
vec2 uv2 = uv2_interp;
#endif
#if defined(COLOR_USED)
vec4 color = color_interp;
#endif
#if defined(NORMAL_MAP_USED)
vec3 normal_map = vec3(0.5);
#endif
float normal_map_depth = 1.0;
vec2 screen_uv = gl_FragCoord.xy * scene_data.screen_pixel_size;
float sss_strength = 0.0;
#ifdef ALPHA_SCISSOR_USED
float alpha_scissor_threshold = 1.0;
#endif // ALPHA_SCISSOR_USED
#ifdef ALPHA_HASH_USED
float alpha_hash_scale = 1.0;
#endif // ALPHA_HASH_USED
#ifdef ALPHA_ANTIALIASING_EDGE_USED
float alpha_antialiasing_edge = 0.0;
vec2 alpha_texture_coordinate = vec2(0.0, 0.0);
#endif // ALPHA_ANTIALIASING_EDGE_USED
#ifdef LIGHT_VERTEX_USED
vec3 light_vertex = vertex;
#endif //LIGHT_VERTEX_USED
highp mat3 model_normal_matrix;
if (bool(model_flags & uint(FLAGS_NON_UNIFORM_SCALE))) {
model_normal_matrix = transpose(inverse(mat3(model_matrix)));
} else {
model_normal_matrix = mat3(model_matrix);
}
{
#CODE : FRAGMENT
}
// Keep albedo values in positive number range as negative values "wraparound" into positive numbers resulting in wrong colors
albedo = max(albedo, vec3(0.0));
#ifdef LIGHT_VERTEX_USED
vertex = light_vertex;
#ifdef USE_MULTIVIEW
view = -normalize(vertex - eye_offset);
#else
view = -normalize(vertex);
#endif //USE_MULTIVIEW
#endif //LIGHT_VERTEX_USED
#ifndef USE_SHADOW_TO_OPACITY
#if defined(ALPHA_SCISSOR_USED)
if (alpha < alpha_scissor_threshold) {
discard;
}
alpha = 1.0;
#else
#ifdef MODE_RENDER_DEPTH
#ifdef USE_OPAQUE_PREPASS
if (alpha < opaque_prepass_threshold) {
discard;
}
#endif // USE_OPAQUE_PREPASS
#endif // MODE_RENDER_DEPTH
#endif // !ALPHA_SCISSOR_USED
#endif // !USE_SHADOW_TO_OPACITY
#ifdef NORMAL_MAP_USED
normal_map.xy = normal_map.xy * 2.0 - 1.0;
normal_map.z = sqrt(max(0.0, 1.0 - dot(normal_map.xy, normal_map.xy))); //always ignore Z, as it can be RG packed, Z may be pos/neg, etc.
normal = normalize(mix(normal, tangent * normal_map.x + binormal * normal_map.y + normal * normal_map.z, normal_map_depth));
#endif
#ifdef LIGHT_ANISOTROPY_USED
if (anisotropy > 0.01) {
//rotation matrix
mat3 rot = mat3(tangent, binormal, normal);
//make local to space
tangent = normalize(rot * vec3(anisotropy_flow.x, anisotropy_flow.y, 0.0));
binormal = normalize(rot * vec3(-anisotropy_flow.y, anisotropy_flow.x, 0.0));
}
#endif
#ifndef MODE_RENDER_DEPTH
#ifndef FOG_DISABLED
#ifndef CUSTOM_FOG_USED
#ifndef DISABLE_FOG
// fog must be processed as early as possible and then packed.
// to maximize VGPR usage
if (scene_data.fog_enabled) {
fog = fog_process(vertex);
}
#endif // !DISABLE_FOG
#endif // !CUSTOM_FOG_USED
uint fog_rg = packHalf2x16(fog.rg);
uint fog_ba = packHalf2x16(fog.ba);
#endif // !FOG_DISABLED
// Convert colors to linear
albedo = srgb_to_linear(albedo);
emission = srgb_to_linear(emission);
// TODO Backlight and transmittance when used
#ifndef MODE_UNSHADED
vec3 f0 = F0(metallic, specular, albedo);
vec3 specular_light = vec3(0.0, 0.0, 0.0);
vec3 diffuse_light = vec3(0.0, 0.0, 0.0);
vec3 ambient_light = vec3(0.0, 0.0, 0.0);
#ifdef BASE_PASS
/////////////////////// LIGHTING //////////////////////////////
#ifndef AMBIENT_LIGHT_DISABLED
// IBL precalculations
float ndotv = clamp(dot(normal, view), 0.0, 1.0);
vec3 F = f0 + (max(vec3(1.0 - roughness), f0) - f0) * pow(1.0 - ndotv, 5.0);
#ifdef USE_RADIANCE_MAP
if (scene_data.use_reflection_cubemap) {
#ifdef LIGHT_ANISOTROPY_USED
// https://google.github.io/filament/Filament.html#lighting/imagebasedlights/anisotropy
vec3 anisotropic_direction = anisotropy >= 0.0 ? binormal : tangent;
vec3 anisotropic_tangent = cross(anisotropic_direction, view);
vec3 anisotropic_normal = cross(anisotropic_tangent, anisotropic_direction);
vec3 bent_normal = normalize(mix(normal, anisotropic_normal, abs(anisotropy) * clamp(5.0 * roughness, 0.0, 1.0)));
vec3 ref_vec = reflect(-view, bent_normal);
#else
vec3 ref_vec = reflect(-view, normal);
#endif
ref_vec = mix(ref_vec, normal, roughness * roughness);
float horizon = min(1.0 + dot(ref_vec, normal), 1.0);
ref_vec = scene_data.radiance_inverse_xform * ref_vec;
specular_light = textureLod(radiance_map, ref_vec, sqrt(roughness) * RADIANCE_MAX_LOD).rgb;
specular_light = srgb_to_linear(specular_light);
specular_light *= horizon * horizon;
specular_light *= scene_data.ambient_light_color_energy.a;
}
#endif // USE_RADIANCE_MAP
// Calculate Reflection probes
#ifndef DISABLE_REFLECTION_PROBE
vec4 ambient_accum = vec4(0.0);
{
vec4 reflection_accum = vec4(0.0);
reflection_process(refprobe1_texture, normal, vertex_interp, refprobe1_local_matrix,
refprobe1_use_box_project, refprobe1_box_extents, refprobe1_box_offset,
refprobe1_exterior, refprobe1_intensity, refprobe1_ambient_mode, refprobe1_ambient_color,
roughness, ambient_light, specular_light, reflection_accum, ambient_accum);
#ifdef SECOND_REFLECTION_PROBE
reflection_process(refprobe2_texture, normal, vertex_interp, refprobe2_local_matrix,
refprobe2_use_box_project, refprobe2_box_extents, refprobe2_box_offset,
refprobe2_exterior, refprobe2_intensity, refprobe2_ambient_mode, refprobe2_ambient_color,
roughness, ambient_light, specular_light, reflection_accum, ambient_accum);
#endif // SECOND_REFLECTION_PROBE
if (reflection_accum.a > 0.0) {
specular_light = reflection_accum.rgb / reflection_accum.a;
}
}
#endif // DISABLE_REFLECTION_PROBE
#if defined(CUSTOM_RADIANCE_USED)
specular_light = mix(specular_light, custom_radiance.rgb, custom_radiance.a);
#endif // CUSTOM_RADIANCE_USED
#ifndef USE_LIGHTMAP
//lightmap overrides everything
if (scene_data.use_ambient_light) {
ambient_light = scene_data.ambient_light_color_energy.rgb;
#ifdef USE_RADIANCE_MAP
if (scene_data.use_ambient_cubemap) {
vec3 ambient_dir = scene_data.radiance_inverse_xform * normal;
vec3 cubemap_ambient = textureLod(radiance_map, ambient_dir, RADIANCE_MAX_LOD).rgb;
cubemap_ambient = srgb_to_linear(cubemap_ambient);
ambient_light = mix(ambient_light, cubemap_ambient * scene_data.ambient_light_color_energy.a, scene_data.ambient_color_sky_mix);
}
#endif // USE_RADIANCE_MAP
#ifndef DISABLE_REFLECTION_PROBE
if (ambient_accum.a > 0.0) {
ambient_light = mix(ambient_light, (ambient_accum.rgb / ambient_accum.a) * scene_data.ambient_light_color_energy.a, scene_data.ambient_color_sky_mix);
}
#endif // DISABLE_REFLECTION_PROBE
}
#endif // USE_LIGHTMAP
#if defined(CUSTOM_IRRADIANCE_USED)
ambient_light = mix(ambient_light, custom_irradiance.rgb, custom_irradiance.a);
#endif // CUSTOM_IRRADIANCE_USED
#ifndef DISABLE_LIGHTMAP
#ifdef USE_LIGHTMAP_CAPTURE
{
vec3 wnormal = mat3(scene_data.inv_view_matrix) * normal;
const float c1 = 0.429043;
const float c2 = 0.511664;
const float c3 = 0.743125;
const float c4 = 0.886227;
const float c5 = 0.247708;
ambient_light += (c1 * lightmap_captures[8].rgb * (wnormal.x * wnormal.x - wnormal.y * wnormal.y) +
c3 * lightmap_captures[6].rgb * wnormal.z * wnormal.z +
c4 * lightmap_captures[0].rgb -
c5 * lightmap_captures[6].rgb +
2.0 * c1 * lightmap_captures[4].rgb * wnormal.x * wnormal.y +
2.0 * c1 * lightmap_captures[7].rgb * wnormal.x * wnormal.z +
2.0 * c1 * lightmap_captures[5].rgb * wnormal.y * wnormal.z +
2.0 * c2 * lightmap_captures[3].rgb * wnormal.x +
2.0 * c2 * lightmap_captures[1].rgb * wnormal.y +
2.0 * c2 * lightmap_captures[2].rgb * wnormal.z) *
scene_data.emissive_exposure_normalization;
}
#else
#ifdef USE_LIGHTMAP
{
vec3 uvw;
uvw.xy = uv2 * lightmap_uv_scale.zw + lightmap_uv_scale.xy;
uvw.z = float(lightmap_slice);
#ifdef USE_SH_LIGHTMAP
uvw.z *= 4.0; // SH textures use 4 times more data.
#ifdef LIGHTMAP_BICUBIC_FILTER
vec3 lm_light_l0 = textureArray_bicubic(lightmap_textures, uvw + vec3(0.0, 0.0, 0.0), lightmap_texture_size).rgb;
vec3 lm_light_l1n1 = (textureArray_bicubic(lightmap_textures, uvw + vec3(0.0, 0.0, 1.0), lightmap_texture_size).rgb - vec3(0.5)) * 2.0;
vec3 lm_light_l1_0 = (textureArray_bicubic(lightmap_textures, uvw + vec3(0.0, 0.0, 2.0), lightmap_texture_size).rgb - vec3(0.5)) * 2.0;
vec3 lm_light_l1p1 = (textureArray_bicubic(lightmap_textures, uvw + vec3(0.0, 0.0, 3.0), lightmap_texture_size).rgb - vec3(0.5)) * 2.0;
#else
vec3 lm_light_l0 = textureLod(lightmap_textures, uvw + vec3(0.0, 0.0, 0.0), 0.0).rgb;
vec3 lm_light_l1n1 = (textureLod(lightmap_textures, uvw + vec3(0.0, 0.0, 1.0), 0.0).rgb - vec3(0.5)) * 2.0;
vec3 lm_light_l1_0 = (textureLod(lightmap_textures, uvw + vec3(0.0, 0.0, 2.0), 0.0).rgb - vec3(0.5)) * 2.0;
vec3 lm_light_l1p1 = (textureLod(lightmap_textures, uvw + vec3(0.0, 0.0, 3.0), 0.0).rgb - vec3(0.5)) * 2.0;
#endif
vec3 n = normalize(lightmap_normal_xform * normal);
ambient_light += lm_light_l0 * lightmap_exposure_normalization;
ambient_light += lm_light_l1n1 * n.y * (lm_light_l0 * lightmap_exposure_normalization * 4.0);
ambient_light += lm_light_l1_0 * n.z * (lm_light_l0 * lightmap_exposure_normalization * 4.0);
ambient_light += lm_light_l1p1 * n.x * (lm_light_l0 * lightmap_exposure_normalization * 4.0);
#else
#ifdef LIGHTMAP_BICUBIC_FILTER
ambient_light += textureArray_bicubic(lightmap_textures, uvw, lightmap_texture_size).rgb * lightmap_exposure_normalization;
#else
ambient_light += textureLod(lightmap_textures, uvw, 0.0).rgb * lightmap_exposure_normalization;
#endif
#endif
}
#endif // USE_LIGHTMAP
#endif // USE_LIGHTMAP_CAPTURE
#endif // !DISABLE_LIGHTMAP
ambient_light *= albedo.rgb;
ambient_light *= ao;
#endif // !AMBIENT_LIGHT_DISABLED
// convert ao to direct light ao
ao = mix(1.0, ao, ao_light_affect);
#ifndef AMBIENT_LIGHT_DISABLED
{
#if defined(DIFFUSE_TOON)
//simplify for toon, as
specular_light *= specular * metallic * albedo * 2.0;
#else
// scales the specular reflections, needs to be be computed before lighting happens,
// but after environment, GI, and reflection probes are added
// Environment brdf approximation (Lazarov 2013)
// see https://www.unrealengine.com/en-US/blog/physically-based-shading-on-mobile
const vec4 c0 = vec4(-1.0, -0.0275, -0.572, 0.022);
const vec4 c1 = vec4(1.0, 0.0425, 1.04, -0.04);
vec4 r = roughness * c0 + c1;
float ndotv = clamp(dot(normal, view), 0.0, 1.0);
float a004 = min(r.x * r.x, exp2(-9.28 * ndotv)) * r.x + r.y;
vec2 env = vec2(-1.04, 1.04) * a004 + r.zw;
specular_light *= env.x * f0 + env.y * clamp(50.0 * f0.g, metallic, 1.0);
#endif
}
#endif // !AMBIENT_LIGHT_DISABLED
#ifdef USE_VERTEX_LIGHTING
specular_light += specular_light_interp * f0;
diffuse_light += diffuse_light_interp;
#else
#ifndef DISABLE_LIGHT_DIRECTIONAL
for (uint i = uint(0); i < scene_data.directional_light_count; i++) {
#if defined(USE_LIGHTMAP) && !defined(DISABLE_LIGHTMAP)
if (directional_lights[i].bake_mode == LIGHT_BAKE_STATIC) {
continue;
}
#endif
light_compute(normal, normalize(directional_lights[i].direction), normalize(view), directional_lights[i].size, directional_lights[i].color * directional_lights[i].energy, true, 1.0, f0, roughness, metallic, 1.0, albedo, alpha,
#ifdef LIGHT_BACKLIGHT_USED
backlight,
#endif
#ifdef LIGHT_RIM_USED
rim, rim_tint,
#endif
#ifdef LIGHT_CLEARCOAT_USED
clearcoat, clearcoat_roughness, normalize(normal_interp),
#endif
#ifdef LIGHT_ANISOTROPY_USED
binormal,
tangent, anisotropy,
#endif
diffuse_light,
specular_light);
}
#endif // !DISABLE_LIGHT_DIRECTIONAL
#ifndef DISABLE_LIGHT_OMNI
for (uint i = 0u; i < MAX_FORWARD_LIGHTS; i++) {
if (i >= omni_light_count) {
break;
}
#if defined(USE_LIGHTMAP) && !defined(DISABLE_LIGHTMAP)
if (omni_lights[omni_light_indices[i]].bake_mode == LIGHT_BAKE_STATIC) {
continue;
}
#endif
light_process_omni(omni_light_indices[i], vertex, view, normal, f0, roughness, metallic, 1.0, albedo, alpha,
#ifdef LIGHT_BACKLIGHT_USED
backlight,
#endif
#ifdef LIGHT_RIM_USED
rim,
rim_tint,
#endif
#ifdef LIGHT_CLEARCOAT_USED
clearcoat, clearcoat_roughness, normalize(normal_interp),
#endif
#ifdef LIGHT_ANISOTROPY_USED
binormal, tangent, anisotropy,
#endif
diffuse_light, specular_light);
}
#endif // !DISABLE_LIGHT_OMNI
#ifndef DISABLE_LIGHT_SPOT
for (uint i = 0u; i < MAX_FORWARD_LIGHTS; i++) {
if (i >= spot_light_count) {
break;
}
#if defined(USE_LIGHTMAP) && !defined(DISABLE_LIGHTMAP)
if (spot_lights[spot_light_indices[i]].bake_mode == LIGHT_BAKE_STATIC) {
continue;
}
#endif
light_process_spot(spot_light_indices[i], vertex, view, normal, f0, roughness, metallic, 1.0, albedo, alpha,
#ifdef LIGHT_BACKLIGHT_USED
backlight,
#endif
#ifdef LIGHT_RIM_USED
rim,
rim_tint,
#endif
#ifdef LIGHT_CLEARCOAT_USED
clearcoat, clearcoat_roughness, normalize(normal_interp),
#endif
#ifdef LIGHT_ANISOTROPY_USED
tangent,
binormal, anisotropy,
#endif
diffuse_light, specular_light);
}
#endif // !DISABLE_LIGHT_SPOT
#endif // !USE_VERTEX_LIGHTING
#endif // BASE_PASS
#endif // !MODE_UNSHADED
#endif // !MODE_RENDER_DEPTH
#if defined(USE_SHADOW_TO_OPACITY)
#ifndef MODE_RENDER_DEPTH
alpha = min(alpha, clamp(length(ambient_light), 0.0, 1.0));
#if defined(ALPHA_SCISSOR_USED)
if (alpha < alpha_scissor_threshold) {
discard;
}
#endif // !ALPHA_SCISSOR_USED
#endif // !MODE_RENDER_DEPTH
#endif // USE_SHADOW_TO_OPACITY
#ifdef MODE_RENDER_DEPTH
#ifdef RENDER_SHADOWS_LINEAR
// Linearize the depth buffer if rendering cubemap shadows.
gl_FragDepth = (scene_data.z_far - (length(vertex) + scene_data.shadow_bias)) / scene_data.z_far;
#endif
// Nothing happens, so a tree-ssa optimizer will result in no fragment shader :)
#else // !MODE_RENDER_DEPTH
#ifdef RENDER_MATERIAL
albedo_output_buffer.rgb = albedo;
albedo_output_buffer.a = alpha;
normal_output_buffer.rgb = normal * 0.5 + 0.5;
normal_output_buffer.a = 0.0;
orm_output_buffer.r = ao;
orm_output_buffer.g = roughness;
orm_output_buffer.b = metallic;
orm_output_buffer.a = 1.0;
emission_output_buffer.rgb = emission;
emission_output_buffer.a = 0.0;
#else // !RENDER_MATERIAL
#ifdef BASE_PASS
#ifdef MODE_UNSHADED
frag_color = vec4(albedo, alpha);
#else
diffuse_light *= albedo;
diffuse_light *= 1.0 - metallic;
ambient_light *= 1.0 - metallic;
frag_color = vec4(diffuse_light + specular_light, alpha);
frag_color.rgb += emission + ambient_light;
#endif //!MODE_UNSHADED
#ifndef FOG_DISABLED
fog.xy = unpackHalf2x16(fog_rg);
fog.zw = unpackHalf2x16(fog_ba);
frag_color.rgb = mix(frag_color.rgb, fog.rgb, fog.a);
#endif // !FOG_DISABLED
// Tonemap before writing as we are writing to an sRGB framebuffer
frag_color.rgb *= exposure;
#ifdef APPLY_TONEMAPPING
frag_color.rgb = apply_tonemapping(frag_color.rgb, white);
#endif
frag_color.rgb = linear_to_srgb(frag_color.rgb);
#else // !BASE_PASS
frag_color = vec4(0.0, 0.0, 0.0, alpha);
#endif // !BASE_PASS
/* ADDITIVE LIGHTING PASS */
#ifdef USE_ADDITIVE_LIGHTING
diffuse_light = vec3(0.0);
specular_light = vec3(0.0);
#ifdef USE_VERTEX_LIGHTING
diffuse_light = additive_diffuse_light_interp;
specular_light = additive_specular_light_interp * f0;
#endif // USE_VERTEX_LIGHTING
#if !defined(ADDITIVE_OMNI) && !defined(ADDITIVE_SPOT)
#ifndef SHADOWS_DISABLED
// Orthogonal shadows
#if !defined(LIGHT_USE_PSSM2) && !defined(LIGHT_USE_PSSM4)
float directional_shadow = sample_shadow(directional_shadow_atlas, directional_shadows[directional_shadow_index].shadow_atlas_pixel_size, shadow_coord);
#endif // !defined(LIGHT_USE_PSSM2) && !defined(LIGHT_USE_PSSM4)
// PSSM2 shadows
#ifdef LIGHT_USE_PSSM2
float depth_z = -vertex.z;
vec4 light_split_offsets = directional_shadows[directional_shadow_index].shadow_split_offsets;
//take advantage of prefetch
float shadow1 = sample_shadow(directional_shadow_atlas, directional_shadows[directional_shadow_index].shadow_atlas_pixel_size, shadow_coord);
float shadow2 = sample_shadow(directional_shadow_atlas, directional_shadows[directional_shadow_index].shadow_atlas_pixel_size, shadow_coord2);
float directional_shadow = 1.0;
if (depth_z < light_split_offsets.y) {
#ifdef LIGHT_USE_PSSM_BLEND
float directional_shadow2 = 1.0;
float pssm_blend = 0.0;
bool use_blend = true;
#endif
if (depth_z < light_split_offsets.x) {
directional_shadow = shadow1;
#ifdef LIGHT_USE_PSSM_BLEND
directional_shadow2 = shadow2;
pssm_blend = smoothstep(0.0, light_split_offsets.x, depth_z);
#endif
} else {
directional_shadow = shadow2;
#ifdef LIGHT_USE_PSSM_BLEND
use_blend = false;
#endif
}
#ifdef LIGHT_USE_PSSM_BLEND
if (use_blend) {
directional_shadow = mix(directional_shadow, directional_shadow2, pssm_blend);
}
#endif
}
#endif //LIGHT_USE_PSSM2
// PSSM4 shadows
#ifdef LIGHT_USE_PSSM4
float depth_z = -vertex.z;
vec4 light_split_offsets = directional_shadows[directional_shadow_index].shadow_split_offsets;
float shadow1 = sample_shadow(directional_shadow_atlas, directional_shadows[directional_shadow_index].shadow_atlas_pixel_size, shadow_coord);
float shadow2 = sample_shadow(directional_shadow_atlas, directional_shadows[directional_shadow_index].shadow_atlas_pixel_size, shadow_coord2);
float shadow3 = sample_shadow(directional_shadow_atlas, directional_shadows[directional_shadow_index].shadow_atlas_pixel_size, shadow_coord3);
float shadow4 = sample_shadow(directional_shadow_atlas, directional_shadows[directional_shadow_index].shadow_atlas_pixel_size, shadow_coord4);
float directional_shadow = 1.0;
if (depth_z < light_split_offsets.w) {
#ifdef LIGHT_USE_PSSM_BLEND
float directional_shadow2 = 1.0;
float pssm_blend = 0.0;
bool use_blend = true;
#endif
if (depth_z < light_split_offsets.y) {
if (depth_z < light_split_offsets.x) {
directional_shadow = shadow1;
#ifdef LIGHT_USE_PSSM_BLEND
directional_shadow2 = shadow2;
pssm_blend = smoothstep(0.0, light_split_offsets.x, depth_z);
#endif
} else {
directional_shadow = shadow2;
#ifdef LIGHT_USE_PSSM_BLEND
directional_shadow2 = shadow3;
pssm_blend = smoothstep(light_split_offsets.x, light_split_offsets.y, depth_z);
#endif
}
} else {
if (depth_z < light_split_offsets.z) {
directional_shadow = shadow3;
#if defined(LIGHT_USE_PSSM_BLEND)
directional_shadow2 = shadow4;
pssm_blend = smoothstep(light_split_offsets.y, light_split_offsets.z, depth_z);
#endif
} else {
directional_shadow = shadow4;
#if defined(LIGHT_USE_PSSM_BLEND)
use_blend = false;
#endif
}
}
#if defined(LIGHT_USE_PSSM_BLEND)
if (use_blend) {
directional_shadow = mix(directional_shadow, directional_shadow2, pssm_blend);
}
#endif
}
#endif //LIGHT_USE_PSSM4
directional_shadow = mix(directional_shadow, 1.0, smoothstep(directional_shadows[directional_shadow_index].fade_from, directional_shadows[directional_shadow_index].fade_to, vertex.z));
directional_shadow = mix(1.0, directional_shadow, directional_lights[directional_shadow_index].shadow_opacity);
#else
float directional_shadow = 1.0f;
#endif // SHADOWS_DISABLED
#ifndef USE_VERTEX_LIGHTING
light_compute(normal, normalize(directional_lights[directional_shadow_index].direction), normalize(view), directional_lights[directional_shadow_index].size, directional_lights[directional_shadow_index].color * directional_lights[directional_shadow_index].energy, true, directional_shadow, f0, roughness, metallic, 1.0, albedo, alpha,
#ifdef LIGHT_BACKLIGHT_USED
backlight,
#endif
#ifdef LIGHT_RIM_USED
rim, rim_tint,
#endif
#ifdef LIGHT_CLEARCOAT_USED
clearcoat, clearcoat_roughness, normalize(normal_interp),
#endif
#ifdef LIGHT_ANISOTROPY_USED
binormal,
tangent, anisotropy,
#endif
diffuse_light,
specular_light);
#else
// Just apply shadows to vertex lighting.
diffuse_light *= directional_shadow;
specular_light *= directional_shadow;
#endif // !USE_VERTEX_LIGHTING
#endif // !defined(ADDITIVE_OMNI) && !defined(ADDITIVE_SPOT)
#ifdef ADDITIVE_OMNI
float omni_shadow = 1.0f;
#ifndef SHADOWS_DISABLED
vec3 light_ray = ((positional_shadows[positional_shadow_index].shadow_matrix * vec4(shadow_coord.xyz, 1.0))).xyz;
omni_shadow = texture(omni_shadow_texture, vec4(light_ray, 1.0 - length(light_ray) * omni_lights[omni_light_index].inv_radius));
omni_shadow = mix(1.0, omni_shadow, omni_lights[omni_light_index].shadow_opacity);
#endif // SHADOWS_DISABLED
#ifndef USE_VERTEX_LIGHTING
light_process_omni(omni_light_index, vertex, view, normal, f0, roughness, metallic, omni_shadow, albedo, alpha,
#ifdef LIGHT_BACKLIGHT_USED
backlight,
#endif
#ifdef LIGHT_RIM_USED
rim,
rim_tint,
#endif
#ifdef LIGHT_CLEARCOAT_USED
clearcoat, clearcoat_roughness, normalize(normal_interp),
#endif
#ifdef LIGHT_ANISOTROPY_USED
binormal, tangent, anisotropy,
#endif
diffuse_light, specular_light);
#else
// Just apply shadows to vertex lighting.
diffuse_light *= omni_shadow;
specular_light *= omni_shadow;
#endif // !USE_VERTEX_LIGHTING
#endif // ADDITIVE_OMNI
#ifdef ADDITIVE_SPOT
float spot_shadow = 1.0f;
#ifndef SHADOWS_DISABLED
spot_shadow = sample_shadow(spot_shadow_texture, positional_shadows[positional_shadow_index].shadow_atlas_pixel_size, shadow_coord);
spot_shadow = mix(1.0, spot_shadow, spot_lights[spot_light_index].shadow_opacity);
#endif // SHADOWS_DISABLED
#ifndef USE_VERTEX_LIGHTING
light_process_spot(spot_light_index, vertex, view, normal, f0, roughness, metallic, spot_shadow, albedo, alpha,
#ifdef LIGHT_BACKLIGHT_USED
backlight,
#endif
#ifdef LIGHT_RIM_USED
rim,
rim_tint,
#endif
#ifdef LIGHT_CLEARCOAT_USED
clearcoat, clearcoat_roughness, normalize(normal_interp),
#endif
#ifdef LIGHT_ANISOTROPY_USED
tangent,
binormal, anisotropy,
#endif
diffuse_light, specular_light);
#else
// Just apply shadows to vertex lighting.
diffuse_light *= spot_shadow;
specular_light *= spot_shadow;
#endif // !USE_VERTEX_LIGHTING
#endif // ADDITIVE_SPOT
diffuse_light *= albedo;
diffuse_light *= 1.0 - metallic;
vec3 additive_light_color = diffuse_light + specular_light;
#ifndef FOG_DISABLED
fog.xy = unpackHalf2x16(fog_rg);
fog.zw = unpackHalf2x16(fog_ba);
additive_light_color *= (1.0 - fog.a);
#endif // !FOG_DISABLED
// Tonemap before writing as we are writing to an sRGB framebuffer
additive_light_color *= exposure;
#ifdef APPLY_TONEMAPPING
additive_light_color = apply_tonemapping(additive_light_color, white);
#endif
additive_light_color = linear_to_srgb(additive_light_color);
frag_color.rgb += additive_light_color;
#endif // USE_ADDITIVE_LIGHTING
frag_color.rgb *= scene_data.luminance_multiplier;
#endif // !RENDER_MATERIAL
#endif // !MODE_RENDER_DEPTH
#ifdef PREMUL_ALPHA_USED
frag_color.rgb *= premul_alpha;
#endif // PREMUL_ALPHA_USED
}
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