/**************************************************************************/
/* test_curve.h */
/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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#ifndef TEST_CURVE_H
#define TEST_CURVE_H
#include "core/math/math_funcs.h"
#include "scene/resources/curve.h"
#include "tests/test_macros.h"
namespace TestCurve {
TEST_CASE("[Curve] Default curve") {
const Ref<Curve> curve = memnew(Curve);
CHECK_MESSAGE(
curve->get_point_count() == 0,
"Default curve should contain the expected number of points.");
CHECK_MESSAGE(
Math::is_zero_approx(curve->sample(0)),
"Default curve should return the expected value at offset 0.0.");
CHECK_MESSAGE(
Math::is_zero_approx(curve->sample(0.5)),
"Default curve should return the expected value at offset 0.5.");
CHECK_MESSAGE(
Math::is_zero_approx(curve->sample(1)),
"Default curve should return the expected value at offset 1.0.");
}
TEST_CASE("[Curve] Custom curve with free tangents") {
Ref<Curve> curve = memnew(Curve);
// "Sawtooth" curve with an open ending towards the 1.0 offset.
curve->add_point(Vector2(0, 0));
curve->add_point(Vector2(0.25, 1));
curve->add_point(Vector2(0.5, 0));
curve->add_point(Vector2(0.75, 1));
curve->set_bake_resolution(11);
CHECK_MESSAGE(
Math::is_zero_approx(curve->get_point_left_tangent(0)),
"get_point_left_tangent() should return the expected value for point index 0.");
CHECK_MESSAGE(
Math::is_zero_approx(curve->get_point_right_tangent(0)),
"get_point_right_tangent() should return the expected value for point index 0.");
CHECK_MESSAGE(
curve->get_point_left_mode(0) == Curve::TangentMode::TANGENT_FREE,
"get_point_left_mode() should return the expected value for point index 0.");
CHECK_MESSAGE(
curve->get_point_right_mode(0) == Curve::TangentMode::TANGENT_FREE,
"get_point_right_mode() should return the expected value for point index 0.");
CHECK_MESSAGE(
curve->get_point_count() == 4,
"Custom free curve should contain the expected number of points.");
CHECK_MESSAGE(
Math::is_zero_approx(curve->sample(-0.1)),
"Custom free curve should return the expected value at offset -0.1.");
CHECK_MESSAGE(
curve->sample(0.1) == doctest::Approx((real_t)0.352),
"Custom free curve should return the expected value at offset 0.1.");
CHECK_MESSAGE(
curve->sample(0.4) == doctest::Approx((real_t)0.352),
"Custom free curve should return the expected value at offset 0.4.");
CHECK_MESSAGE(
curve->sample(0.7) == doctest::Approx((real_t)0.896),
"Custom free curve should return the expected value at offset 0.7.");
CHECK_MESSAGE(
curve->sample(1) == doctest::Approx(1),
"Custom free curve should return the expected value at offset 1.");
CHECK_MESSAGE(
curve->sample(2) == doctest::Approx(1),
"Custom free curve should return the expected value at offset 2.");
CHECK_MESSAGE(
Math::is_zero_approx(curve->sample_baked(-0.1)),
"Custom free curve should return the expected baked value at offset -0.1.");
CHECK_MESSAGE(
curve->sample_baked(0.1) == doctest::Approx((real_t)0.352),
"Custom free curve should return the expected baked value at offset 0.1.");
CHECK_MESSAGE(
curve->sample_baked(0.4) == doctest::Approx((real_t)0.352),
"Custom free curve should return the expected baked value at offset 0.4.");
CHECK_MESSAGE(
curve->sample_baked(0.7) == doctest::Approx((real_t)0.896),
"Custom free curve should return the expected baked value at offset 0.7.");
CHECK_MESSAGE(
curve->sample_baked(1) == doctest::Approx(1),
"Custom free curve should return the expected baked value at offset 1.");
CHECK_MESSAGE(
curve->sample_baked(2) == doctest::Approx(1),
"Custom free curve should return the expected baked value at offset 2.");
curve->remove_point(1);
CHECK_MESSAGE(
curve->sample(0.1) == doctest::Approx(0),
"Custom free curve should return the expected value at offset 0.1 after removing point at index 1.");
CHECK_MESSAGE(
curve->sample_baked(0.1) == doctest::Approx(0),
"Custom free curve should return the expected baked value at offset 0.1 after removing point at index 1.");
curve->clear_points();
CHECK_MESSAGE(
curve->sample(0.6) == doctest::Approx(0),
"Custom free curve should return the expected value at offset 0.6 after clearing all points.");
CHECK_MESSAGE(
curve->sample_baked(0.6) == doctest::Approx(0),
"Custom free curve should return the expected baked value at offset 0.6 after clearing all points.");
}
TEST_CASE("[Curve] Custom curve with linear tangents") {
Ref<Curve> curve = memnew(Curve);
// "Sawtooth" curve with an open ending towards the 1.0 offset.
curve->add_point(Vector2(0, 0), 0, 0, Curve::TangentMode::TANGENT_LINEAR, Curve::TangentMode::TANGENT_LINEAR);
curve->add_point(Vector2(0.25, 1), 0, 0, Curve::TangentMode::TANGENT_LINEAR, Curve::TangentMode::TANGENT_LINEAR);
curve->add_point(Vector2(0.5, 0), 0, 0, Curve::TangentMode::TANGENT_LINEAR, Curve::TangentMode::TANGENT_LINEAR);
curve->add_point(Vector2(0.75, 1), 0, 0, Curve::TangentMode::TANGENT_LINEAR, Curve::TangentMode::TANGENT_LINEAR);
CHECK_MESSAGE(
curve->get_point_left_tangent(3) == doctest::Approx(4),
"get_point_left_tangent() should return the expected value for point index 3.");
CHECK_MESSAGE(
Math::is_zero_approx(curve->get_point_right_tangent(3)),
"get_point_right_tangent() should return the expected value for point index 3.");
CHECK_MESSAGE(
curve->get_point_left_mode(3) == Curve::TangentMode::TANGENT_LINEAR,
"get_point_left_mode() should return the expected value for point index 3.");
CHECK_MESSAGE(
curve->get_point_right_mode(3) == Curve::TangentMode::TANGENT_LINEAR,
"get_point_right_mode() should return the expected value for point index 3.");
ERR_PRINT_OFF;
CHECK_MESSAGE(
Math::is_zero_approx(curve->get_point_right_tangent(300)),
"get_point_right_tangent() should return the expected value for invalid point index 300.");
CHECK_MESSAGE(
curve->get_point_left_mode(-12345) == Curve::TangentMode::TANGENT_FREE,
"get_point_left_mode() should return the expected value for invalid point index -12345.");
ERR_PRINT_ON;
CHECK_MESSAGE(
curve->get_point_count() == 4,
"Custom linear curve should contain the expected number of points.");
CHECK_MESSAGE(
Math::is_zero_approx(curve->sample(-0.1)),
"Custom linear curve should return the expected value at offset -0.1.");
CHECK_MESSAGE(
curve->sample(0.1) == doctest::Approx((real_t)0.4),
"Custom linear curve should return the expected value at offset 0.1.");
CHECK_MESSAGE(
curve->sample(0.4) == doctest::Approx((real_t)0.4),
"Custom linear curve should return the expected value at offset 0.4.");
CHECK_MESSAGE(
curve->sample(0.7) == doctest::Approx((real_t)0.8),
"Custom linear curve should return the expected value at offset 0.7.");
CHECK_MESSAGE(
curve->sample(1) == doctest::Approx(1),
"Custom linear curve should return the expected value at offset 1.0.");
CHECK_MESSAGE(
curve->sample(2) == doctest::Approx(1),
"Custom linear curve should return the expected value at offset 2.0.");
CHECK_MESSAGE(
Math::is_zero_approx(curve->sample_baked(-0.1)),
"Custom linear curve should return the expected baked value at offset -0.1.");
CHECK_MESSAGE(
curve->sample_baked(0.1) == doctest::Approx((real_t)0.4),
"Custom linear curve should return the expected baked value at offset 0.1.");
CHECK_MESSAGE(
curve->sample_baked(0.4) == doctest::Approx((real_t)0.4),
"Custom linear curve should return the expected baked value at offset 0.4.");
CHECK_MESSAGE(
curve->sample_baked(0.7) == doctest::Approx((real_t)0.8),
"Custom linear curve should return the expected baked value at offset 0.7.");
CHECK_MESSAGE(
curve->sample_baked(1) == doctest::Approx(1),
"Custom linear curve should return the expected baked value at offset 1.0.");
CHECK_MESSAGE(
curve->sample_baked(2) == doctest::Approx(1),
"Custom linear curve should return the expected baked value at offset 2.0.");
ERR_PRINT_OFF;
curve->remove_point(10);
ERR_PRINT_ON;
CHECK_MESSAGE(
curve->sample(0.7) == doctest::Approx((real_t)0.8),
"Custom free curve should return the expected value at offset 0.7 after removing point at invalid index 10.");
CHECK_MESSAGE(
curve->sample_baked(0.7) == doctest::Approx((real_t)0.8),
"Custom free curve should return the expected baked value at offset 0.7 after removing point at invalid index 10.");
}
TEST_CASE("[Curve] Straight line offset test") {
Ref<Curve> curve = memnew(Curve);
curve->add_point(Vector2(0, 0));
curve->add_point(Vector2(1, 1));
CHECK_MESSAGE(
curve->sample_baked(1.0 - (0.5 / curve->get_bake_resolution())) != curve->sample_baked(1),
"Straight line curve should return different baked values at offset 1 vs offset (1 - 0.5 / bake resolution) .");
}
TEST_CASE("[Curve2D] Linear sampling should return exact value") {
Ref<Curve2D> curve = memnew(Curve2D);
real_t len = 2048.0;
curve->add_point(Vector2(0, 0));
curve->add_point(Vector2(len, 0));
real_t baked_length = curve->get_baked_length();
CHECK(len == baked_length);
for (int i = 0; i < len; i++) {
Vector2 pos = curve->sample_baked(i);
CHECK_MESSAGE(Math::is_equal_approx(pos.x, i), "sample_baked should return exact value");
}
}
TEST_CASE("[Curve3D] Linear sampling should return exact value") {
Ref<Curve3D> curve = memnew(Curve3D);
real_t len = 2048.0;
curve->add_point(Vector3(0, 0, 0));
curve->add_point(Vector3(len, 0, 0));
ERR_PRINT_OFF
real_t baked_length = curve->get_baked_length();
ERR_PRINT_ON
CHECK(len == baked_length);
for (int i = 0; i < len; i++) {
Vector3 pos = curve->sample_baked(i);
CHECK_MESSAGE(Math::is_equal_approx(pos.x, i), "sample_baked should return exact value");
}
}
} // namespace TestCurve
#endif // TEST_CURVE_H
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