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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2012 Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): Alexandr Kuznetsov, Jason Wilkins, Mike Erwin
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file source/blender/gpu/GPU_matrix.h
* \ingroup gpu
*/
#ifndef _GPU_MATRIX_H_
#define _GPU_MATRIX_H_
#include "BLI_sys_types.h"
#include "GPU_glew.h"
#ifdef __cplusplus
extern "C" {
#endif
/* For now we support the legacy matrix stack in gpuGetMatrix functions.
* Will remove this after switching to core profile, which can happen after
* we convert all code to use the API in this file. */
#define SUPPORT_LEGACY_MATRIX 1
void gpuMatrixInit(void); /* called by system -- make private? */
/* MatrixMode is conceptually different from GL_MATRIX_MODE */
typedef enum {
MATRIX_MODE_INACTIVE,
MATRIX_MODE_2D,
MATRIX_MODE_3D
} MatrixMode;
MatrixMode gpuMatrixMode(void);
void gpuMatrixBegin2D(void);
void gpuMatrixBegin3D(void);
void gpuMatrixEnd(void);
/* TODO: gpuMatrixResume2D & gpuMatrixResume3D to switch modes but not reset stack */
/* ModelView Matrix (2D or 3D) */
void gpuPushMatrix(void); /* TODO: PushCopy vs PushIdentity? */
void gpuPopMatrix(void);
void gpuLoadIdentity(void);
void gpuScaleUniform(float factor);
/* 3D ModelView Matrix */
void gpuLoadMatrix3D(const float m[4][4]);
void gpuMultMatrix3D(const float m[4][4]);
//const float *gpuGetMatrix3D(float m[4][4]);
void gpuTranslate3f(float x, float y, float z);
void gpuTranslate3fv(const float vec[3]);
void gpuScale3f(float x, float y, float z);
void gpuScale3fv(const float vec[3]);
void gpuRotate3f(float deg, float x, float y, float z); /* axis of rotation should be a unit vector */
void gpuRotate3fv(float deg, const float axis[3]); /* axis of rotation should be a unit vector */
void gpuRotateAxis(float deg, char axis); /* TODO: enum for axis? */
void gpuLookAt(float eyeX, float eyeY, float eyeZ, float centerX, float centerY, float centerZ, float upX, float upY, float upZ);
/* TODO: variant that takes eye[3], center[3], up[3] */
/* 2D ModelView Matrix */
void gpuLoadMatrix2D(const float m[3][3]);
void gpuMultMatrix2D(const float m[3][3]);
void gpuTranslate2f(float x, float y);
void gpuTranslate2fv(const float vec[2]);
void gpuScale2f(float x, float y);
void gpuScale2fv(const float vec[2]);
void gpuRotate2D(float deg);
/* 3D Projection Matrix */
void gpuLoadProjectionMatrix3D(const float m[4][4]);
void gpuOrtho(float left, float right, float bottom, float top, float near, float far);
void gpuFrustum(float left, float right, float bottom, float top, float near, float far);
void gpuPerspective(float fovy, float aspect, float near, float far);
/* 3D Projection between Window and World Space */
void gpuProject(const float world[3], const float model[4][4], const float proj[4][4], const int view[4], float win[3]);
bool gpuUnProject(const float win[3], const float model[4][4], const float proj[4][4], const int view[4], float world[3]);
/* 2D Projection Matrix */
void gpuOrtho2D(float left, float right, float bottom, float top);
/* functions to get matrix values */
const float *gpuGetModelViewMatrix3D(float m[4][4]);
const float *gpuGetProjectionMatrix3D(float m[4][4]);
const float *gpuGetModelViewProjectionMatrix3D(float m[4][4]);
const float *gpuGetNormalMatrix(float m[3][3]);
const float *gpuGetNormalMatrixInverse(float m[3][3]);
/* set uniform values for currently bound shader */
void gpuBindMatrices(GLuint program);
bool gpuMatricesDirty(void); /* since last bind */
#ifdef __cplusplus
}
#endif
#ifndef SUPPRESS_GENERIC_MATRIX_API
/* make matrix inputs generic, to avoid warnings */
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)
# define gpuMultMatrix3D(x) \
gpuMultMatrix3D(_Generic((x), \
float *: (const float (*)[4])(x), \
float [16]: (const float (*)[4])(x), \
float (*)[4]: (const float (*)[4])(x), \
float [4][4]: (const float (*)[4])(x), \
const float *: (const float (*)[4])(x), \
const float [16]: (const float (*)[4])(x), \
const float (*)[4]: (const float (*)[4])(x), \
const float [4][4]: (const float (*)[4])(x)) \
)
# define gpuLoadMatrix3D(x) \
gpuLoadMatrix3D(_Generic((x), \
float *: (const float (*)[4])(x), \
float [16]: (const float (*)[4])(x), \
float (*)[4]: (const float (*)[4])(x), \
float [4][4]: (const float (*)[4])(x), \
const float *: (const float (*)[4])(x), \
const float [16]: (const float (*)[4])(x), \
const float (*)[4]: (const float (*)[4])(x), \
const float [4][4]: (const float (*)[4])(x)) \
)
/* TODO: finish this in a simpler way --^ */
#else
# define gpuMultMatrix3D(x) gpuMultMatrix3D((const float (*)[4])(x))
# define gpuLoadMatrix3D(x) gpuLoadMatrix3D((const float (*)[4])(x))
# define gpuLoadProjectionMatrix3D(x) gpuLoadProjectionMatrix3D((const float (*)[4])(x))
# define gpuMultMatrix2D(x) gpuMultMatrix2D((const float (*)[3])(x))
# define gpuLoadMatrix2D(x) gpuLoadMatrix2D((const float (*)[3])(x))
# define gpuGetModelViewMatrix3D(x) gpuGetModelViewMatrix3D((float (*)[4])(x))
# define gpuGetProjectionMatrix3D(x) gpuGetProjectionMatrix3D((float (*)[4])(x))
# define gpuGetModelViewProjectionMatrix3D(x) gpuGetModelViewProjectionMatrix3D((float (*)[4])(x))
# define gpuGetNormalMatrix(x) gpuGetNormalMatrix((float (*)[3])(x))
# define gpuGetNormalMatrixInverse(x) gpuGetNormalMatrixInverse((float (*)[3])(x))
#endif /* C11 */
#endif /* SUPPRESS_GENERIC_MATRIX_API */
#endif /* GPU_MATRIX_H */
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