191 lines
6.6 KiB
C++
191 lines
6.6 KiB
C++
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2012 Blender Foundation.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): Alexandr Kuznetsov, Jason Wilkins, Mike Erwin
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file source/blender/gpu/GPU_matrix.h
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* \ingroup gpu
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*/
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#ifndef __GPU_MATRIX_H__
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#define __GPU_MATRIX_H__
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#include "BLI_sys_types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct Gwn_ShaderInterface;
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void gpuMatrixReset(void); /* to Identity transform & empty stack */
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/* ModelView Matrix (2D or 3D) */
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void gpuPushMatrix(void); /* TODO: PushCopy vs PushIdentity? */
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void gpuPopMatrix(void);
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void gpuLoadIdentity(void);
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void gpuScaleUniform(float factor);
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/* 3D ModelView Matrix */
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void gpuLoadMatrix(const float m[4][4]);
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void gpuMultMatrix(const float m[4][4]);
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void gpuTranslate3f(float x, float y, float z);
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void gpuTranslate3fv(const float vec[3]);
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void gpuScale3f(float x, float y, float z);
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void gpuScale3fv(const float vec[3]);
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void gpuRotate3f(float deg, float x, float y, float z); /* axis of rotation should be a unit vector */
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void gpuRotate3fv(float deg, const float axis[3]); /* axis of rotation should be a unit vector */
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void gpuRotateAxis(float deg, char axis); /* TODO: enum for axis? */
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void gpuLookAt(float eyeX, float eyeY, float eyeZ, float centerX, float centerY, float centerZ, float upX, float upY, float upZ);
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/* TODO: variant that takes eye[3], center[3], up[3] */
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/* 2D ModelView Matrix */
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void gpuTranslate2f(float x, float y);
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void gpuTranslate2fv(const float vec[2]);
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void gpuScale2f(float x, float y);
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void gpuScale2fv(const float vec[2]);
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void gpuRotate2D(float deg);
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/* Projection Matrix (2D or 3D) */
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void gpuPushProjectionMatrix(void);
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void gpuPopProjectionMatrix(void);
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/* 3D Projection Matrix */
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void gpuLoadIdentityProjectionMatrix(void);
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void gpuLoadProjectionMatrix(const float m[4][4]);
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void gpuOrtho(float left, float right, float bottom, float top, float near, float far);
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void gpuFrustum(float left, float right, float bottom, float top, float near, float far);
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void gpuPerspective(float fovy, float aspect, float near, float far);
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/* 3D Projection between Window and World Space */
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void gpuProject(const float world[3], const float model[4][4], const float proj[4][4], const int view[4], float win[3]);
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bool gpuUnProject(const float win[3], const float model[4][4], const float proj[4][4], const int view[4], float world[3]);
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/* 2D Projection Matrix */
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void gpuOrtho2D(float left, float right, float bottom, float top);
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/* functions to get matrix values */
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const float (*gpuGetModelViewMatrix(float m[4][4]))[4];
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const float (*gpuGetProjectionMatrix(float m[4][4]))[4];
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const float (*gpuGetModelViewProjectionMatrix(float m[4][4]))[4];
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const float (*gpuGetNormalMatrix(float m[3][3]))[3];
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const float (*gpuGetNormalMatrixInverse(float m[3][3]))[3];
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/* set uniform values for currently bound shader */
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void gpuBindMatrices(const struct Gwn_ShaderInterface *);
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bool gpuMatricesDirty(void); /* since last bind */
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/* Python API needs to be able to inspect the stack so errors raise exceptions instead of crashing. */
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#ifdef USE_GPU_PY_MATRIX_API
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int GPU_matrix_stack_level_get_model_view(void);
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int GPU_matrix_stack_level_get_projection(void);
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/* static assert ensures this doesn't change! */
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#define GPU_PY_MATRIX_STACK_LEN 31
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#endif /* USE_GPU_PY_MATRIX_API */
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#ifdef __cplusplus
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}
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#endif
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#ifndef SUPPRESS_GENERIC_MATRIX_API
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#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)
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#define _GPU_MAT3_CONST_CAST(x) (_Generic((x), \
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void *: (const float (*)[3])(x), \
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float *: (const float (*)[3])(x), \
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float [9]: (const float (*)[3])(x), \
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float (*)[4]: (const float (*)[3])(x), \
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float [4][4]: (const float (*)[3])(x), \
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const void *: (const float (*)[3])(x), \
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const float *: (const float (*)[3])(x), \
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const float [9]: (const float (*)[3])(x), \
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const float (*)[3]: (const float (*)[3])(x), \
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const float [3][3]: (const float (*)[3])(x)) \
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)
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#define _GPU_MAT3_CAST(x) (_Generic((x), \
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void *: (float (*)[3])(x), \
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float *: (float (*)[3])(x), \
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float [9]: (float (*)[3])(x), \
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float (*)[3]: (float (*)[3])(x), \
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float [3][3]: (float (*)[3])(x)) \
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)
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#define _GPU_MAT4_CONST_CAST(x) (_Generic((x), \
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void *: (const float (*)[4])(x), \
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float *: (const float (*)[4])(x), \
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float [16]: (const float (*)[4])(x), \
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float (*)[4]: (const float (*)[4])(x), \
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float [4][4]: (const float (*)[4])(x), \
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const void *: (const float (*)[4])(x), \
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const float *: (const float (*)[4])(x), \
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const float [16]: (const float (*)[4])(x), \
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const float (*)[4]: (const float (*)[4])(x), \
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const float [4][4]: (const float (*)[4])(x)) \
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)
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#define _GPU_MAT4_CAST(x) (_Generic((x), \
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void *: (float (*)[4])(x), \
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float *: (float (*)[4])(x), \
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float [16]: (float (*)[4])(x), \
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float (*)[4]: (float (*)[4])(x), \
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float [4][4]: (float (*)[4])(x)) \
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)
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#else
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# define _GPU_MAT3_CONST_CAST(x) (const float (*)[3])(x)
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# define _GPU_MAT3_CAST(x) (float (*)[3])(x)
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# define _GPU_MAT4_CONST_CAST(x) (const float (*)[4])(x)
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# define _GPU_MAT4_CAST(x) (float (*)[4])(x)
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#endif /* C11 */
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/* make matrix inputs generic, to avoid warnings */
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# define gpuMultMatrix(x) gpuMultMatrix(_GPU_MAT4_CONST_CAST(x))
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# define gpuLoadMatrix(x) gpuLoadMatrix(_GPU_MAT4_CONST_CAST(x))
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# define gpuLoadProjectionMatrix(x) gpuLoadProjectionMatrix(_GPU_MAT4_CONST_CAST(x))
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# define gpuGetModelViewMatrix(x) gpuGetModelViewMatrix(_GPU_MAT4_CAST(x))
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# define gpuGetProjectionMatrix(x) gpuGetProjectionMatrix(_GPU_MAT4_CAST(x))
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# define gpuGetModelViewProjectionMatrix(x) gpuGetModelViewProjectionMatrix(_GPU_MAT4_CAST(x))
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# define gpuGetNormalMatrix(x) gpuGetNormalMatrix(_GPU_MAT3_CAST(x))
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# define gpuGetNormalMatrixInverse(x) gpuGetNormalMatrixInverse(_GPU_MAT3_CAST(x))
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#endif /* SUPPRESS_GENERIC_MATRIX_API */
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#endif /* __GPU_MATRIX_H__ */
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