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102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
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/*
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* Mesa 3-D graphics library
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* Version: 3.5
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*
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* Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* New (3.1) transformation code written by Keith Whitwell.
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*/
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/* Note - respects the stride of the output vector.
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*/
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static void TAG(dotprod_vec2)( GLfloat *out,
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GLuint outstride,
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const GLvector4f *coord_vec,
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const GLfloat plane[4] )
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{
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GLuint stride = coord_vec->stride;
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GLfloat *coord = coord_vec->start;
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GLuint count = coord_vec->count;
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GLuint i;
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const GLfloat plane0 = plane[0], plane1 = plane[1], plane3 = plane[3];
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for (i=0;i<count;i++,STRIDE_F(coord,stride),STRIDE_F(out,outstride)) {
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*out = (coord[0] * plane0 +
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coord[1] * plane1 +
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plane3);
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}
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}
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static void TAG(dotprod_vec3)( GLfloat *out,
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GLuint outstride,
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const GLvector4f *coord_vec,
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const GLfloat plane[4] )
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{
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GLuint stride = coord_vec->stride;
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GLfloat *coord = coord_vec->start;
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GLuint count = coord_vec->count;
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GLuint i;
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const GLfloat plane0 = plane[0], plane1 = plane[1], plane2 = plane[2];
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const GLfloat plane3 = plane[3];
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for (i=0;i<count;i++,STRIDE_F(coord,stride),STRIDE_F(out,outstride)) {
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*out = (coord[0] * plane0 +
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coord[1] * plane1 +
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coord[2] * plane2 +
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plane3);
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}
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}
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static void TAG(dotprod_vec4)( GLfloat *out,
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GLuint outstride,
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const GLvector4f *coord_vec,
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const GLfloat plane[4] )
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{
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GLuint stride = coord_vec->stride;
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GLfloat *coord = coord_vec->start;
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GLuint count = coord_vec->count;
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GLuint i;
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const GLfloat plane0 = plane[0], plane1 = plane[1], plane2 = plane[2];
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const GLfloat plane3 = plane[3];
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for (i=0;i<count;i++,STRIDE_F(coord,stride),STRIDE_F(out,outstride)) {
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*out = (coord[0] * plane0 +
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coord[1] * plane1 +
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coord[2] * plane2 +
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coord[3] * plane3);
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}
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}
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static void TAG(init_dotprod)( void )
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{
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_mesa_dotprod_tab[2] = TAG(dotprod_vec2);
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_mesa_dotprod_tab[3] = TAG(dotprod_vec3);
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_mesa_dotprod_tab[4] = TAG(dotprod_vec4);
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}
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