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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"
#ifdef __cplusplus
extern "C" {
#endif
struct GPUShaderInterface;
void GPU_matrix_reset(void); /* to Identity transform & empty stack */
/* ModelView Matrix (2D or 3D) */
void GPU_matrix_push(void); /* TODO: PushCopy vs PushIdentity? */
void GPU_matrix_pop(void);
void GPU_matrix_identity_set(void);
void GPU_matrix_scale_1f(float factor);
/* 3D ModelView Matrix */
void GPU_matrix_set(const float m[4][4]);
void GPU_matrix_mul(const float m[4][4]);
void GPU_matrix_translate_3f(float x, float y, float z);
void GPU_matrix_translate_3fv(const float vec[3]);
void GPU_matrix_scale_3f(float x, float y, float z);
void GPU_matrix_scale_3fv(const float vec[3]);
void GPU_matrix_rotate_3f(float deg, float x, float y, float z); /* axis of rotation should be a unit vector */
void GPU_matrix_rotate_3fv(float deg, const float axis[3]); /* axis of rotation should be a unit vector */
void GPU_matrix_rotate_axis(float deg, char axis); /* TODO: enum for axis? */
void GPU_matrix_look_at(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 GPU_matrix_translate_2f(float x, float y);
void GPU_matrix_translate_2fv(const float vec[2]);
void GPU_matrix_scale_2f(float x, float y);
void GPU_matrix_scale_2fv(const float vec[2]);
void GPU_matrix_rotate_2d(float deg);
/* Projection Matrix (2D or 3D) */
void GPU_matrix_push_projection(void);
void GPU_matrix_pop_projection(void);
/* 3D Projection Matrix */
void GPU_matrix_identity_projection_set(void);
void GPU_matrix_projection_set(const float m[4][4]);
void GPU_matrix_ortho_set(float left, float right, float bottom, float top, float near, float far);
void GPU_matrix_frustum_set(float left, float right, float bottom, float top, float near, float far);
void GPU_matrix_perspective_set(float fovy, float aspect, float near, float far);
/* 3D Projection between Window and World Space */
void GPU_matrix_project(const float world[3], const float model[4][4], const float proj[4][4], const int view[4], float win[3]);
bool GPU_matrix_unproject(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 GPU_matrix_ortho_2d_set(float left, float right, float bottom, float top);
/* functions to get matrix values */
const float (*GPU_matrix_model_view_get(float m[4][4]))[4];
const float (*GPU_matrix_projection_get(float m[4][4]))[4];
const float (*GPU_matrix_model_view_projection_get(float m[4][4]))[4];
const float (*GPU_matrix_normal_get(float m[3][3]))[3];
const float (*GPU_matrix_normal_inverse_get(float m[3][3]))[3];
/* set uniform values for currently bound shader */
void GPU_matrix_bind(const struct GPUShaderInterface *);
bool GPU_matrix_dirty_get(void); /* since last bind */
/* Python API needs to be able to inspect the stack so errors raise exceptions instead of crashing. */
#ifdef USE_GPU_PY_MATRIX_API
int GPU_matrix_stack_level_get_model_view(void);
int GPU_matrix_stack_level_get_projection(void);
/* static assert ensures this doesn't change! */
#define GPU_PY_MATRIX_STACK_LEN 31
#endif /* USE_GPU_PY_MATRIX_API */
#ifdef __cplusplus
}
#endif
#ifndef SUPPRESS_GENERIC_MATRIX_API
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)
#define _GPU_MAT3_CONST_CAST(x) (_Generic((x), \
void *: (const float (*)[3])(x), \
float *: (const float (*)[3])(x), \
float [9]: (const float (*)[3])(x), \
float (*)[4]: (const float (*)[3])(x), \
float [4][4]: (const float (*)[3])(x), \
const void *: (const float (*)[3])(x), \
const float *: (const float (*)[3])(x), \
const float [9]: (const float (*)[3])(x), \
const float (*)[3]: (const float (*)[3])(x), \
const float [3][3]: (const float (*)[3])(x)) \
)
#define _GPU_MAT3_CAST(x) (_Generic((x), \
void *: (float (*)[3])(x), \
float *: (float (*)[3])(x), \
float [9]: (float (*)[3])(x), \
float (*)[3]: (float (*)[3])(x), \
float [3][3]: (float (*)[3])(x)) \
)
#define _GPU_MAT4_CONST_CAST(x) (_Generic((x), \
void *: (const float (*)[4])(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 void *: (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 _GPU_MAT4_CAST(x) (_Generic((x), \
void *: (float (*)[4])(x), \
float *: (float (*)[4])(x), \
float [16]: (float (*)[4])(x), \
float (*)[4]: (float (*)[4])(x), \
float [4][4]: (float (*)[4])(x)) \
)
#else
# define _GPU_MAT3_CONST_CAST(x) (const float (*)[3])(x)
# define _GPU_MAT3_CAST(x) (float (*)[3])(x)
# define _GPU_MAT4_CONST_CAST(x) (const float (*)[4])(x)
# define _GPU_MAT4_CAST(x) (float (*)[4])(x)
#endif /* C11 */
/* make matrix inputs generic, to avoid warnings */
# define GPU_matrix_mul(x) GPU_matrix_mul(_GPU_MAT4_CONST_CAST(x))
# define GPU_matrix_set(x) GPU_matrix_set(_GPU_MAT4_CONST_CAST(x))
# define GPU_matrix_projection_set(x) GPU_matrix_projection_set(_GPU_MAT4_CONST_CAST(x))
# define GPU_matrix_model_view_get(x) GPU_matrix_model_view_get(_GPU_MAT4_CAST(x))
# define GPU_matrix_projection_get(x) GPU_matrix_projection_get(_GPU_MAT4_CAST(x))
# define GPU_matrix_model_view_projection_get(x) GPU_matrix_model_view_projection_get(_GPU_MAT4_CAST(x))
# define GPU_matrix_normal_get(x) GPU_matrix_normal_get(_GPU_MAT3_CAST(x))
# define GPU_matrix_normal_inverse_get(x) GPU_matrix_normal_inverse_get(_GPU_MAT3_CAST(x))
#endif /* SUPPRESS_GENERIC_MATRIX_API */
#endif /* __GPU_MATRIX_H__ */
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