chromium/third_party/angle/third_party/glmark2/src/src/libmatrix/mat.cc

//
// Copyright (c) 2010 Linaro Limited
//
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the MIT License which accompanies
// this distribution, and is available at
// http://www.opensource.org/licenses/mit-license.php
//
// Contributors:
//     Jesse Barker - original implementation.
//
#include <math.h>
#include "mat.h"

namespace LibMatrix
{
namespace Mat4
{

mat4
translate(float x, float y, float z)
{ … }

mat4
scale(float x, float y, float z)
{ … }

//
// As per the OpenGL "red book" definition of rotation, from the appendix
// on Homogeneous Coordinates and Transformation Matrices, the "upper left"
// 3x3 portion of the result matrix is formed by:
//
// M = uuT + (cos a)(I - uuT) + (sin a)S
//
// where u is the normalized input vector, uuT is the outer product of that
// vector and its transpose, I is the identity matrix and S is the matrix:
//
// |  0  -z'  y' |
// |  z'  0  -x' |
// | -y'  x'  0  |
//
// where x', y' and z' are the elements of u
//
mat4
rotate(float angle, float x, float y, float z)
{ … }

mat4
frustum(float left, float right, float bottom, float top, float near, float far)
{ … }

mat4
ortho(float left, float right, float bottom, float top, float near, float far)
{ … }

mat4
perspective(float fovy, float aspect, float zNear, float zFar)
{ … }

mat4 lookAt(float eyeX, float eyeY, float eyeZ, 
    float centerX, float centerY, float centerZ, 
    float upX, float upY, float upZ)
{ … }

} // namespace Mat4

} // namespace LibMatrix