From BlenderWiki
Matrixes
Header File: GPU_matrix.h
uniform mat4 b_ModelViewMatrix; uniform mat4 b_ProjectionMatrix; uniform mat4 b_ModelViewProjectionMatrix; uniform mat4 b_TextureMatrix[b_MaxTextureCoords];
The common matrix library is designed based on the legacy OpenGL matrix stack.
In addition it contains re-implementations of GLU functions, some convenience functions, and some functions that are useful for Blender.
Where there is normally a float and double version of the function, only the floating point version is provided and no 'f' suffix is needed.
OpenGL Replacements
Where a GLenum is called for, it has the same value as from OpenGL with the same meaning.
void gpuPushMatrix(void); void gpuPopMatrix(void); void gpuMatrixMode(GLenum mode); void gpuLoadMatrix(const GLfloat* m); void gpuLoadIdentity(void); void gpuMultMatrix(const GLfloat*m); void gpuMultMatrixd(const double *m); void gpuTranslate(GLfloat x, GLfloat y, GLfloat z); void gpuScale(GLfloat x, GLfloat y, GLfloat z); void gpuOrtho(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top, GLfloat nearVal, GLfloat farVal); void gpuFrustum(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top, GLfloat nearVal, GLfloat farVal);
Get Replacements
State is queried without using deprecated GLenum values. For example, glGetFloatv(GL_MODELVIEW_MATRIX, ...) is replaced with gpuGetMatrix(GL_MODELVIEW_MATRIX, ...).
GLenum gpuGetMatrixMode(void); const GLfloat* gpuGetMatrix(GLenum type, GLfloat* m);
GLU Replacements
void gpuLookAt(GLfloat eyeX, GLfloat eyeY, GLfloat eyeZ, GLfloat centerX, GLfloat centerY, GLfloat centerZ, GLfloat upX, GLfloat upY, GLfloat upZ); void gpuProject(const GLfloat obj[3], const GLfloat model[4][4], const GLfloat proj[4][4], const GLint view[4], GLfloat win[3]); GLboolean gpuUnProject(const GLfloat win[3], const GLfloat model[4][4], const GLfloat proj[4][4], const GLint view[4], GLfloat obj[3]);
No OpenGL or GLU Equivalent
Angles are still given in degrees, not radians.
void gpuRotateVector(GLfloat deg, GLfloat vector[3]); void gpuRotateAxis(GLfloat deg, char axis); void gpuRotateRight(char type); void gpuLoadOrtho(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top, GLfloat nearVal, GLfloat farVal); void gpuLoadFrustum(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top, GLfloat nearVal, GLfloat farVal);
