From 23caf20169ac38436ee9c13914f1d6aa7cf6bb5e Mon Sep 17 00:00:00 2001 From: Keith Whitwell Date: Thu, 16 Nov 2000 21:05:34 +0000 Subject: Move the transform and lighting code to two new directories math: Provides basic matrix and vector functionality that might be useful to multiple software t&l implementations, and is used by core mesa to manage the Model, Project, etc matrices. tnl: The real transform & lighting code from core mesa, including everything from glVertex3f through vertex buffer handling, transformation, clipping, lighting and handoff to a driver for rasterization. The interfaces of these can be further tightened up, but the basic splitting up of state and code move is done. --- src/mesa/math/m_xform.c | 251 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 251 insertions(+) create mode 100644 src/mesa/math/m_xform.c (limited to 'src/mesa/math/m_xform.c') diff --git a/src/mesa/math/m_xform.c b/src/mesa/math/m_xform.c new file mode 100644 index 0000000000..6bc6a9cea3 --- /dev/null +++ b/src/mesa/math/m_xform.c @@ -0,0 +1,251 @@ +/* $Id: m_xform.c,v 1.1 2000/11/16 21:05:41 keithw Exp $ */ + +/* + * Mesa 3-D graphics library + * Version: 3.5 + * + * Copyright (C) 1999-2000 Brian Paul All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + + +/* + * Matrix/vertex/vector transformation stuff + * + * + * NOTES: + * 1. 4x4 transformation matrices are stored in memory in column major order. + * 2. Points/vertices are to be thought of as column vectors. + * 3. Transformation of a point p by a matrix M is: p' = M * p + */ + + +#include "glheader.h" +#include "macros.h" +#include "mmath.h" + +#include "m_matrix.h" +#include "m_xform.h" + + +#ifdef DEBUG +#include "m_debug_xform.h" +#endif + +#ifdef USE_X86_ASM +#include "X86/common_x86_asm.h" +#endif + +clip_func gl_clip_tab[5]; +dotprod_func gl_dotprod_tab[2][5]; +vec_copy_func gl_copy_tab[2][0x10]; +normal_func gl_normal_tab[0xf][0x4]; +transform_func **(gl_transform_tab[2]); +static transform_func *cull_transform_tab[5]; +static transform_func *raw_transform_tab[5]; + + +/* Raw data format used for: + * - Object-to-eye transform prior to culling, although this too + * could be culled under some circumstances. + * - Eye-to-clip transform (via the function above). + * - Cliptesting + * - And everything else too, if culling happens to be disabled. + */ +#define TAG(x) x##_raw +#define TAG2(x,y) x##y##_raw +#define IDX 0 +#define STRIDE_LOOP for (i=0;istride; + const GLfloat *from = (GLfloat *)clip_vec->start; + const GLuint count = clip_vec->count; + GLfloat (*vProj)[4] = (GLfloat (*)[4])proj_vec->start; + GLuint i; + + for (i = 0 ; i < count ; i++, STRIDE_F(from, stride)) + { + GLfloat oow = 1.0F / from[3]; + vProj[i][3] = oow; + vProj[i][0] = from[0] * oow; + vProj[i][1] = from[1] * oow; + vProj[i][2] = from[2] * oow; + } + + proj_vec->flags |= VEC_SIZE_4; + proj_vec->size = 3; + proj_vec->count = clip_vec->count; + return proj_vec; +} + + + + + + +/* + * Transform a 4-element row vector (1x4 matrix) by a 4x4 matrix. This + * function is used for transforming clipping plane equations and spotlight + * directions. + * Mathematically, u = v * m. + * Input: v - input vector + * m - transformation matrix + * Output: u - transformed vector + */ +void gl_transform_vector( GLfloat u[4], const GLfloat v[4], const GLfloat m[16] ) +{ + GLfloat v0=v[0], v1=v[1], v2=v[2], v3=v[3]; +#define M(row,col) m[row + col*4] + u[0] = v0 * M(0,0) + v1 * M(1,0) + v2 * M(2,0) + v3 * M(3,0); + u[1] = v0 * M(0,1) + v1 * M(1,1) + v2 * M(2,1) + v3 * M(3,1); + u[2] = v0 * M(0,2) + v1 * M(1,2) + v2 * M(2,2) + v3 * M(3,2); + u[3] = v0 * M(0,3) + v1 * M(1,3) + v2 * M(2,3) + v3 * M(3,3); +#undef M +} + + +/* Useful for one-off point transformations, as in clipping. + * Note that because the matrix isn't analyzed we do too many + * multiplies, and that the result is always 4-clean. + */ +void gl_transform_point_sz( GLfloat Q[4], const GLfloat M[16], + const GLfloat P[4], GLuint sz ) +{ + if (Q == P) + return; + + if (sz == 4) + { + Q[0] = M[0] * P[0] + M[4] * P[1] + M[8] * P[2] + M[12] * P[3]; + Q[1] = M[1] * P[0] + M[5] * P[1] + M[9] * P[2] + M[13] * P[3]; + Q[2] = M[2] * P[0] + M[6] * P[1] + M[10] * P[2] + M[14] * P[3]; + Q[3] = M[3] * P[0] + M[7] * P[1] + M[11] * P[2] + M[15] * P[3]; + } + else if (sz == 3) + { + Q[0] = M[0] * P[0] + M[4] * P[1] + M[8] * P[2] + M[12]; + Q[1] = M[1] * P[0] + M[5] * P[1] + M[9] * P[2] + M[13]; + Q[2] = M[2] * P[0] + M[6] * P[1] + M[10] * P[2] + M[14]; + Q[3] = M[3] * P[0] + M[7] * P[1] + M[11] * P[2] + M[15]; + } + else if (sz == 2) + { + Q[0] = M[0] * P[0] + M[4] * P[1] + M[12]; + Q[1] = M[1] * P[0] + M[5] * P[1] + M[13]; + Q[2] = M[2] * P[0] + M[6] * P[1] + M[14]; + Q[3] = M[3] * P[0] + M[7] * P[1] + M[15]; + } + else if (sz == 1) + { + Q[0] = M[0] * P[0] + M[12]; + Q[1] = M[1] * P[0] + M[13]; + Q[2] = M[2] * P[0] + M[14]; + Q[3] = M[3] * P[0] + M[15]; + } +} + + +/* + * This is called only once. It initializes several tables with pointers + * to optimized transformation functions. This is where we can test for + * AMD 3Dnow! capability, Intel Katmai, etc. and hook in the right code. + */ +void +_math_init_transformation( void ) +{ + gl_transform_tab[0] = raw_transform_tab; + gl_transform_tab[1] = cull_transform_tab; + + init_c_transformations_raw(); + init_c_transformations_masked(); + init_c_norm_transform_raw(); + init_c_norm_transform_masked(); + init_c_cliptest_raw(); + init_copy0_raw(); + init_copy0_masked(); + init_dotprod_raw(); + init_dotprod_masked(); + +#ifdef DEBUG + gl_test_all_transform_functions( "default" ); + gl_test_all_normal_transform_functions( "default" ); +#endif + +#ifdef USE_X86_ASM + gl_init_all_x86_transform_asm(); +#endif +} + +void +_math_init( void ) +{ + _math_init_transformation(); + _math_init_translate(); + _math_init_vertices(); +} -- cgit v1.2.3