mirror of
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c0f477bd04
* removed www dir (dead links, almost none of the posted links are available - correct me when i'm wrong, then we can revert this remove) git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant/trunk@275 8a3a26a2-13c4-0310-b231-cf6edde360e5
791 lines
21 KiB
C
791 lines
21 KiB
C
/*
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Copyright (C) 1999-2007 id Software, Inc. and contributors.
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For a list of contributors, see the accompanying CONTRIBUTORS file.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant 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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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "mathlib.h"
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#include "memory.h"
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void m4x4_identity(m4x4_t matrix)
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{
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matrix[1] = matrix[2] = matrix[3] =
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matrix[4] = matrix[6] = matrix[7] =
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matrix[8] = matrix[9] = matrix[11] =
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matrix[12] = matrix[13] = matrix[14] = 0;
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matrix[0] = matrix[5] = matrix[10] = matrix[15] = 1;
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}
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void m4x4_translation_for_vec3(m4x4_t matrix, const vec3_t translation)
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{
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matrix[1] = matrix[2] = matrix[3] =
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matrix[4] = matrix[6] = matrix[7] =
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matrix[8] = matrix[9] = matrix[11] = 0;
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matrix[0] = matrix[5] = matrix[10] = matrix[15] = 1;
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matrix[12] = translation[0];
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matrix[13] = translation[1];
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matrix[14] = translation[2];
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}
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void m4x4_rotation_for_vec3(m4x4_t matrix, const vec3_t euler, eulerOrder_t order)
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{
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double cx, sx, cy, sy, cz, sz;
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cx = cos(DEG2RAD(euler[0]));
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sx = sin(DEG2RAD(euler[0]));
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cy = cos(DEG2RAD(euler[1]));
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sy = sin(DEG2RAD(euler[1]));
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cz = cos(DEG2RAD(euler[2]));
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sz = sin(DEG2RAD(euler[2]));
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switch(order)
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{
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case eXYZ:
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#if 1
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{
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matrix[0] = (vec_t)(cy*cz);
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matrix[1] = (vec_t)(cy*sz);
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matrix[2] = (vec_t)-sy;
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matrix[4] = (vec_t)(sx*sy*cz + cx*-sz);
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matrix[5] = (vec_t)(sx*sy*sz + cx*cz);
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matrix[6] = (vec_t)(sx*cy);
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matrix[8] = (vec_t)(cx*sy*cz + sx*sz);
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matrix[9] = (vec_t)(cx*sy*sz + -sx*cz);
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matrix[10] = (vec_t)(cx*cy);
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}
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matrix[12] = matrix[13] = matrix[14] = matrix[3] = matrix[7] = matrix[11] = 0;
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matrix[15] = 1;
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#else
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m4x4_identity(matrix);
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matrix[5] =(vec_t) cx; matrix[6] =(vec_t) sx;
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matrix[9] =(vec_t)-sx; matrix[10]=(vec_t) cx;
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{
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m4x4_t temp;
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m4x4_identity(temp);
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temp[0] =(vec_t) cy; temp[2] =(vec_t)-sy;
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temp[8] =(vec_t) sy; temp[10]=(vec_t) cy;
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m4x4_premultiply_by_m4x4(matrix, temp);
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m4x4_identity(temp);
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temp[0] =(vec_t) cz; temp[1] =(vec_t) sz;
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temp[4] =(vec_t)-sz; temp[5] =(vec_t) cz;
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m4x4_premultiply_by_m4x4(matrix, temp);
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}
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#endif
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break;
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case eYZX:
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m4x4_identity(matrix);
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matrix[0] =(vec_t) cy; matrix[2] =(vec_t)-sy;
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matrix[8] =(vec_t) sy; matrix[10]=(vec_t) cy;
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{
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m4x4_t temp;
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m4x4_identity(temp);
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temp[5] =(vec_t) cx; temp[6] =(vec_t) sx;
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temp[9] =(vec_t)-sx; temp[10]=(vec_t) cx;
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m4x4_premultiply_by_m4x4(matrix, temp);
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m4x4_identity(temp);
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temp[0] =(vec_t) cz; temp[1] =(vec_t) sz;
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temp[4] =(vec_t)-sz; temp[5] =(vec_t) cz;
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m4x4_premultiply_by_m4x4(matrix, temp);
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}
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break;
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case eZXY:
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m4x4_identity(matrix);
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matrix[0] =(vec_t) cz; matrix[1] =(vec_t) sz;
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matrix[4] =(vec_t)-sz; matrix[5] =(vec_t) cz;
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{
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m4x4_t temp;
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m4x4_identity(temp);
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temp[5] =(vec_t) cx; temp[6] =(vec_t) sx;
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temp[9] =(vec_t)-sx; temp[10]=(vec_t) cx;
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m4x4_premultiply_by_m4x4(matrix, temp);
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m4x4_identity(temp);
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temp[0] =(vec_t) cy; temp[2] =(vec_t)-sy;
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temp[8] =(vec_t) sy; temp[10]=(vec_t) cy;
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m4x4_premultiply_by_m4x4(matrix, temp);
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}
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break;
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case eXZY:
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m4x4_identity(matrix);
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matrix[5] =(vec_t) cx; matrix[6] =(vec_t) sx;
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matrix[9] =(vec_t)-sx; matrix[10]=(vec_t) cx;
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{
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m4x4_t temp;
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m4x4_identity(temp);
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temp[0] =(vec_t) cz; temp[1] =(vec_t) sz;
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temp[4] =(vec_t)-sz; temp[5] =(vec_t) cz;
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m4x4_premultiply_by_m4x4(matrix, temp);
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m4x4_identity(temp);
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temp[0] =(vec_t) cy; temp[2] =(vec_t)-sy;
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temp[8] =(vec_t) sy; temp[10]=(vec_t) cy;
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m4x4_premultiply_by_m4x4(matrix, temp);
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}
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break;
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case eYXZ:
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/* transposed
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| cy.cz + sx.sy.-sz + -cx.sy.0 0.cz + cx.-sz + sx.0 sy.cz + -sx.cy.-sz + cx.cy.0 |
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| cy.sz + sx.sy.cz + -cx.sy.0 0.sz + cx.cz + sx.0 sy.sz + -sx.cy.cz + cx.cy.0 |
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| cy.0 + sx.sy.0 + -cx.sy.1 0.0 + cx.0 + sx.1 sy.0 + -sx.cy.0 + cx.cy.1 |
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*/
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#if 1
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{
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matrix[0] = (vec_t)(cy*cz + sx*sy*-sz);
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matrix[1] = (vec_t)(cy*sz + sx*sy*cz);
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matrix[2] = (vec_t)(-cx*sy);
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matrix[4] = (vec_t)(cx*-sz);
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matrix[5] = (vec_t)(cx*cz);
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matrix[6] = (vec_t)(sx);
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matrix[8] = (vec_t)(sy*cz + -sx*cy*-sz);
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matrix[9] = (vec_t)(sy*sz + -sx*cy*cz);
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matrix[10] = (vec_t)(cx*cy);
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}
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matrix[12] = matrix[13] = matrix[14] = matrix[3] = matrix[7] = matrix[11] = 0;
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matrix[15] = 1;
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#else
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m4x4_identity(matrix);
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matrix[0] =(vec_t) cy; matrix[2] =(vec_t)-sy;
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matrix[8] =(vec_t) sy; matrix[10]=(vec_t) cy;
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{
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m4x4_t temp;
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m4x4_identity(temp);
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temp[5] =(vec_t) cx; temp[6] =(vec_t) sx;
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temp[9] =(vec_t)-sx; temp[10]=(vec_t) cx;
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m4x4_premultiply_by_m4x4(matrix, temp);
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m4x4_identity(temp);
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temp[0] =(vec_t) cz; temp[1] =(vec_t) sz;
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temp[4] =(vec_t)-sz; temp[5] =(vec_t) cz;
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m4x4_premultiply_by_m4x4(matrix, temp);
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}
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#endif
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break;
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case eZYX:
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#if 1
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{
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matrix[0] = (vec_t)(cy*cz);
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matrix[4] = (vec_t)(cy*-sz);
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matrix[8] = (vec_t)sy;
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matrix[1] = (vec_t)(sx*sy*cz + cx*sz);
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matrix[5] = (vec_t)(sx*sy*-sz + cx*cz);
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matrix[9] = (vec_t)(-sx*cy);
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matrix[2] = (vec_t)(cx*-sy*cz + sx*sz);
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matrix[6] = (vec_t)(cx*-sy*-sz + sx*cz);
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matrix[10] = (vec_t)(cx*cy);
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}
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matrix[12] = matrix[13] = matrix[14] = matrix[3] = matrix[7] = matrix[11] = 0;
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matrix[15] = 1;
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#else
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m4x4_identity(matrix);
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matrix[0] =(vec_t) cz; matrix[1] =(vec_t) sz;
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matrix[4] =(vec_t)-sz; matrix[5] =(vec_t) cz;
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{
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m4x4_t temp;
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m4x4_identity(temp);
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temp[0] =(vec_t) cy; temp[2] =(vec_t)-sy;
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temp[8] =(vec_t) sy; temp[10]=(vec_t) cy;
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m4x4_premultiply_by_m4x4(matrix, temp);
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m4x4_identity(temp);
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temp[5] =(vec_t) cx; temp[6] =(vec_t) sx;
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temp[9] =(vec_t)-sx; temp[10]=(vec_t) cx;
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m4x4_premultiply_by_m4x4(matrix, temp);
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}
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#endif
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break;
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}
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}
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void m4x4_scale_for_vec3(m4x4_t matrix, const vec3_t scale)
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{
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matrix[1] = matrix[2] = matrix[3] =
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matrix[4] = matrix[6] = matrix[7] =
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matrix[8] = matrix[9] = matrix[11] =
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matrix[12] = matrix[13] = matrix[14] = 0;
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matrix[15] = 1;
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matrix[0] = scale[0];
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matrix[5] = scale[1];
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matrix[10] = scale[2];
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}
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void m4x4_rotation_for_quat(m4x4_t matrix, const vec4_t rotation)
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{
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float xx,xy,xz,xw,yy,yz,yw,zz,zw;
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xx = rotation[0] * rotation[0];
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xy = rotation[0] * rotation[1];
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xz = rotation[0] * rotation[2];
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xw = rotation[0] * rotation[3];
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yy = rotation[1] * rotation[1];
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yz = rotation[1] * rotation[2];
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yw = rotation[1] * rotation[3];
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zz = rotation[2] * rotation[2];
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zw = rotation[2] * rotation[3];
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matrix[0] = 1 - 2 * ( yy + zz );
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matrix[4] = 2 * ( xy - zw );
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matrix[8] = 2 * ( xz + yw );
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matrix[1] = 2 * ( xy + zw );
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matrix[5] = 1 - 2 * ( xx + zz );
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matrix[9] = 2 * ( yz - xw );
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matrix[2] = 2 * ( xz - yw );
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matrix[6] = 2 * ( yz + xw );
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matrix[10] = 1 - 2 * ( xx + yy );
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matrix[3] = matrix[7] = matrix[11] = matrix[12] = matrix[13] = matrix[14] = 0;
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matrix[15] = 1;
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}
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void m4x4_rotation_for_axisangle(m4x4_t matrix, const vec3_t axis, vec_t angle)
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{
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vec4_t rotation;
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angle *= 0.5;
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rotation[3] = (float)sin((float)(angle));
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rotation[0] = axis[0] * rotation[3];
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rotation[1] = axis[1] * rotation[3];
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rotation[2] = axis[2] * rotation[3];
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rotation[3] = (float)cos((float)(angle));
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m4x4_rotation_for_quat(matrix, rotation);
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}
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void m4x4_translate_by_vec3(m4x4_t matrix, const vec3_t translation)
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{
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m4x4_t temp;
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m4x4_translation_for_vec3(temp, translation);
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m4x4_multiply_by_m4x4(matrix, temp);
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}
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void m4x4_rotate_by_vec3(m4x4_t matrix, const vec3_t euler, eulerOrder_t order)
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{
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m4x4_t temp;
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m4x4_rotation_for_vec3(temp, euler, order);
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m4x4_multiply_by_m4x4(matrix, temp);
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}
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void m4x4_scale_by_vec3(m4x4_t matrix, const vec3_t scale)
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{
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m4x4_t temp;
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m4x4_scale_for_vec3(temp, scale);
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m4x4_multiply_by_m4x4(matrix, temp);
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}
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void m4x4_rotate_by_quat(m4x4_t matrix, const vec4_t rotation)
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{
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m4x4_t temp;
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m4x4_rotation_for_quat(temp, rotation);
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m4x4_multiply_by_m4x4(matrix, temp);
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}
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void m4x4_rotate_by_axisangle(m4x4_t matrix, const vec3_t axis, vec_t angle)
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{
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m4x4_t temp;
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m4x4_rotation_for_axisangle(temp, axis, angle);
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m4x4_multiply_by_m4x4(matrix, temp);
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}
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void m4x4_transform_by_vec3(m4x4_t matrix, const vec3_t translation, const vec3_t euler, eulerOrder_t order, const vec3_t scale)
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{
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m4x4_translate_by_vec3(matrix, translation);
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m4x4_rotate_by_vec3(matrix, euler, order);
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m4x4_scale_by_vec3(matrix, scale);
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}
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void m4x4_pivoted_rotate_by_vec3(m4x4_t matrix, const vec3_t euler, eulerOrder_t order, const vec3_t pivotpoint)
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{
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vec3_t vec3_temp;
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VectorNegative(pivotpoint, vec3_temp);
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m4x4_translate_by_vec3(matrix, pivotpoint);
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m4x4_rotate_by_vec3(matrix, euler, order);
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m4x4_translate_by_vec3(matrix, vec3_temp);
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}
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void m4x4_pivoted_scale_by_vec3(m4x4_t matrix, const vec3_t scale, const vec3_t pivotpoint)
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{
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vec3_t vec3_temp;
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VectorNegative(pivotpoint, vec3_temp);
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m4x4_translate_by_vec3(matrix, pivotpoint);
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m4x4_scale_by_vec3(matrix, scale);
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m4x4_translate_by_vec3(matrix, vec3_temp);
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}
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void m4x4_pivoted_transform_by_vec3(m4x4_t matrix, const vec3_t translation, const vec3_t euler, eulerOrder_t order, const vec3_t scale, const vec3_t pivotpoint)
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{
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vec3_t vec3_temp;
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VectorAdd(pivotpoint, translation, vec3_temp);
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m4x4_translate_by_vec3(matrix, vec3_temp);
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m4x4_rotate_by_vec3(matrix, euler, order);
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m4x4_scale_by_vec3(matrix, scale);
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VectorNegative(pivotpoint, vec3_temp);
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m4x4_translate_by_vec3(matrix, vec3_temp);
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}
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void m4x4_pivoted_rotate_by_quat(m4x4_t matrix, const vec4_t rotation, const vec3_t pivotpoint)
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{
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vec3_t vec3_temp;
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VectorNegative(pivotpoint, vec3_temp);
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m4x4_translate_by_vec3(matrix, pivotpoint);
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m4x4_rotate_by_quat(matrix, rotation);
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m4x4_translate_by_vec3(matrix, vec3_temp);
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}
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void m4x4_pivoted_rotate_by_axisangle(m4x4_t matrix, const vec3_t axis, vec_t angle, const vec3_t pivotpoint)
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{
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vec3_t vec3_temp;
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VectorNegative(pivotpoint, vec3_temp);
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m4x4_translate_by_vec3(matrix, pivotpoint);
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m4x4_rotate_by_axisangle(matrix, axis, angle);
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m4x4_translate_by_vec3(matrix, vec3_temp);
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}
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/*
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A = A.B
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A0 = B0 * A0 + B1 * A4 + B2 * A8 + B3 * A12
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A4 = B4 * A0 + B5 * A4 + B6 * A8 + B7 * A12
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A8 = B8 * A0 + B9 * A4 + B10* A8 + B11* A12
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A12= B12* A0 + B13* A4 + B14* A8 + B15* A12
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A1 = B0 * A1 + B1 * A5 + B2 * A9 + B3 * A13
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A5 = B4 * A1 + B5 * A5 + B6 * A9 + B7 * A13
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A9 = B8 * A1 + B9 * A5 + B10* A9 + B11* A13
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A13= B12* A1 + B13* A5 + B14* A9 + B15* A13
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A2 = B0 * A2 + B1 * A6 + B2 * A10+ B3 * A14
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A6 = B4 * A2 + B5 * A6 + B6 * A10+ B7 * A14
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A10= B8 * A2 + B9 * A6 + B10* A10+ B11* A14
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A14= B12* A2 + B13* A6 + B14* A10+ B15* A14
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A3 = B0 * A3 + B1 * A7 + B2 * A11+ B3 * A15
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A7 = B4 * A3 + B5 * A7 + B6 * A11+ B7 * A15
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A11= B8 * A3 + B9 * A7 + B10* A11+ B11* A15
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A15= B12* A3 + B13* A7 + B14* A11+ B15* A15
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*/
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void m4x4_multiply_by_m4x4(m4x4_t dst, const m4x4_t src)
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{
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vec_t dst0, dst1, dst2, dst3;
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#if 1
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dst0 = src[0] * dst[0] + src[1] * dst[4] + src[2] * dst[8] + src[3] * dst[12];
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dst1 = src[4] * dst[0] + src[5] * dst[4] + src[6] * dst[8] + src[7] * dst[12];
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dst2 = src[8] * dst[0] + src[9] * dst[4] + src[10]* dst[8] + src[11]* dst[12];
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dst3 = src[12]* dst[0] + src[13]* dst[4] + src[14]* dst[8] + src[15]* dst[12];
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dst[0] = dst0; dst[4] = dst1; dst[8] = dst2; dst[12]= dst3;
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dst0 = src[0] * dst[1] + src[1] * dst[5] + src[2] * dst[9] + src[3] * dst[13];
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dst1 = src[4] * dst[1] + src[5] * dst[5] + src[6] * dst[9] + src[7] * dst[13];
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dst2 = src[8] * dst[1] + src[9] * dst[5] + src[10]* dst[9] + src[11]* dst[13];
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dst3 = src[12]* dst[1] + src[13]* dst[5] + src[14]* dst[9] + src[15]* dst[13];
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dst[1] = dst0; dst[5] = dst1; dst[9] = dst2; dst[13]= dst3;
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dst0 = src[0] * dst[2] + src[1] * dst[6] + src[2] * dst[10]+ src[3] * dst[14];
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dst1 = src[4] * dst[2] + src[5] * dst[6] + src[6] * dst[10]+ src[7] * dst[14];
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dst2 = src[8] * dst[2] + src[9] * dst[6] + src[10]* dst[10]+ src[11]* dst[14];
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dst3 = src[12]* dst[2] + src[13]* dst[6] + src[14]* dst[10]+ src[15]* dst[14];
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dst[2] = dst0; dst[6] = dst1; dst[10]= dst2; dst[14]= dst3;
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dst0 = src[0] * dst[3] + src[1] * dst[7] + src[2] * dst[11]+ src[3] * dst[15];
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dst1 = src[4] * dst[3] + src[5] * dst[7] + src[6] * dst[11]+ src[7] * dst[15];
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dst2 = src[8] * dst[3] + src[9] * dst[7] + src[10]* dst[11]+ src[11]* dst[15];
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dst3 = src[12]* dst[3] + src[13]* dst[7] + src[14]* dst[11]+ src[15]* dst[15];
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dst[3] = dst0; dst[7] = dst1; dst[11]= dst2; dst[15]= dst3;
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#else
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vec_t * p = dst;
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for(int i=0;i<4;i++)
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{
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dst1 = src[0] * p[0];
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dst1 += src[1] * p[4];
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dst1 += src[2] * p[8];
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dst1 += src[3] * p[12];
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dst2 = src[4] * p[0];
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dst2 += src[5] * p[4];
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dst2 += src[6] * p[8];
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dst2 += src[7] * p[12];
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dst3 = src[8] * p[0];
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dst3 += src[9] * p[4];
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dst3 += src[10] * p[8];
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dst3 += src[11] * p[12];
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dst4 = src[12] * p[0];
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dst4 += src[13] * p[4];
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dst4 += src[14] * p[8];
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dst4 += src[15] * p[12];
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p[0] = dst1;
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p[4] = dst2;
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p[8] = dst3;
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p[12] = dst4;
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p++;
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}
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#endif
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}
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/*
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A = B.A
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A0 = A0 * B0 + A1 * B4 + A2 * B8 + A3 * B12
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A1 = A0 * B1 + A1 * B5 + A2 * B9 + A3 * B13
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A2 = A0 * B2 + A1 * B6 + A2 * B10+ A3 * B14
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A3 = A0 * B3 + A1 * B7 + A2 * B11+ A3 * B15
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A4 = A4 * B0 + A5 * B4 + A6 * B8 + A7 * B12
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A5 = A4 * B1 + A5 * B5 + A6 * B9 + A7 * B13
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A6 = A4 * B2 + A5 * B6 + A6 * B10+ A7 * B14
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A7 = A4 * B3 + A5 * B7 + A6 * B11+ A7 * B15
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A8 = A8 * B0 + A9 * B4 + A10* B8 + A11* B12
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A9 = A8 * B1 + A9 * B5 + A10* B9 + A11* B13
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A10= A8 * B2 + A9 * B6 + A10* B10+ A11* B14
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A11= A8 * B3 + A9 * B7 + A10* B11+ A11* B15
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A12= A12* B0 + A13* B4 + A14* B8 + A15* B12
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A13= A12* B1 + A13* B5 + A14* B9 + A15* B13
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A14= A12* B2 + A13* B6 + A14* B10+ A15* B14
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A15= A12* B3 + A13* B7 + A14* B11+ A15* B15
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*/
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void m4x4_premultiply_by_m4x4(m4x4_t dst, const m4x4_t src)
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{
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vec_t dst0, dst1, dst2, dst3;
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#if 1
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dst0 = dst[0] * src[0] + dst[1] * src[4] + dst[2] * src[8] + dst[3] * src[12];
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dst1 = dst[0] * src[1] + dst[1] * src[5] + dst[2] * src[9] + dst[3] * src[13];
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dst2 = dst[0] * src[2] + dst[1] * src[6] + dst[2] * src[10]+ dst[3] * src[14];
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dst3 = dst[0] * src[3] + dst[1] * src[7] + dst[2] * src[11]+ dst[3] * src[15];
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dst[0] = dst0; dst[1] = dst1; dst[2] = dst2; dst[3]= dst3;
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dst0 = dst[4] * src[0] + dst[5] * src[4] + dst[6] * src[8] + dst[7] * src[12];
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dst1 = dst[4] * src[1] + dst[5] * src[5] + dst[6] * src[9] + dst[7] * src[13];
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dst2 = dst[4] * src[2] + dst[5] * src[6] + dst[6] * src[10]+ dst[7] * src[14];
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dst3 = dst[4] * src[3] + dst[5] * src[7] + dst[6] * src[11]+ dst[7] * src[15];
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dst[4] = dst0; dst[5] = dst1; dst[6] = dst2; dst[7]= dst3;
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dst0 = dst[8] * src[0] + dst[9] * src[4] + dst[10]* src[8] + dst[11]* src[12];
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dst1 = dst[8] * src[1] + dst[9] * src[5] + dst[10]* src[9] + dst[11]* src[13];
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dst2 = dst[8] * src[2] + dst[9] * src[6] + dst[10]* src[10]+ dst[11]* src[14];
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dst3 = dst[8] * src[3] + dst[9] * src[7] + dst[10]* src[11]+ dst[11]* src[15];
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dst[8] = dst0; dst[9] = dst1; dst[10] = dst2; dst[11]= dst3;
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dst0 = dst[12]* src[0] + dst[13]* src[4] + dst[14]* src[8] + dst[15]* src[12];
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dst1 = dst[12]* src[1] + dst[13]* src[5] + dst[14]* src[9] + dst[15]* src[13];
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dst2 = dst[12]* src[2] + dst[13]* src[6] + dst[14]* src[10]+ dst[15]* src[14];
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dst3 = dst[12]* src[3] + dst[13]* src[7] + dst[14]* src[11]+ dst[15]* src[15];
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dst[12] = dst0; dst[13] = dst1; dst[14] = dst2; dst[15]= dst3;
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#else
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vec_t* p = dst;
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for(int i=0;i<4;i++)
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{
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dst1 = src[0] * p[0];
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dst2 = src[1] * p[0];
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dst3 = src[2] * p[0];
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dst4 = src[3] * p[0];
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dst1 += src[4] * p[1];
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dst2 += src[5] * p[1];
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dst3 += src[6] * p[1];
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dst4 += src[7] * p[1];
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dst1 += src[8] * p[2];
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dst2 += src[9] * p[2];
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dst4 += src[11] * p[2];
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dst3 += src[10] * p[2];
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dst1 += src[12] * p[3];
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dst2 += src[13] * p[3];
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dst3 += src[14] * p[3];
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dst4 += src[15] * p[3];
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*p++ = dst1;
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*p++ = dst2;
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*p++ = dst3;
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*p++ = dst4;
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}
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#endif
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}
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void m4x4_transform_point(const m4x4_t matrix, vec3_t point)
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{
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float out1, out2, out3;
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out1 = matrix[0] * point[0];
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out2 = matrix[1] * point[0];
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out3 = matrix[2] * point[0];
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out1 += matrix[4] * point[1];
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out2 += matrix[5] * point[1];
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out3 += matrix[6] * point[1];
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out1 += matrix[8] * point[2];
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out2 += matrix[9] * point[2];
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out3 += matrix[10] * point[2];
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out1 += matrix[12];
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out2 += matrix[13];
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out3 += matrix[14];
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point[0] = out1;
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point[1] = out2;
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point[2] = out3;
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}
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void m4x4_transform_normal(const m4x4_t matrix, vec3_t normal)
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{
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float out1, out2, out3;
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out1 = matrix[0] * normal[0];
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out2 = matrix[1] * normal[0];
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out3 = matrix[2] * normal[0];
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out1 += matrix[4] * normal[1];
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out2 += matrix[5] * normal[1];
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out3 += matrix[6] * normal[1];
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out1 += matrix[8] * normal[2];
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out2 += matrix[9] * normal[2];
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out3 += matrix[10] * normal[2];
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normal[0] = out1;
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normal[1] = out2;
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normal[2] = out3;
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}
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void m4x4_transform_vec4(const m4x4_t matrix, vec4_t vector)
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{
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float out1, out2, out3, out4;
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out1 = matrix[0] * vector[0];
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out2 = matrix[1] * vector[0];
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out3 = matrix[2] * vector[0];
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out4 = matrix[3] * vector[0];
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out1 += matrix[4] * vector[1];
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out2 += matrix[5] * vector[1];
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out3 += matrix[6] * vector[1];
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out4 += matrix[7] * vector[1];
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out1 += matrix[8] * vector[2];
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out2 += matrix[9] * vector[2];
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out3 += matrix[10] * vector[2];
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out4 += matrix[11] * vector[2];
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out1 += matrix[12] * vector[3];
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out2 += matrix[13] * vector[3];
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out3 += matrix[14] * vector[3];
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out4 += matrix[15] * vector[3];
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vector[0] = out1;
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vector[1] = out2;
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vector[2] = out3;
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vector[3] = out4;
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}
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void m4x4_transpose(m4x4_t matrix)
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{
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int i, j;
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float temp, *p1, *p2;
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for (i=1; i<4; i++) {
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for (j=0; j<i; j++) {
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p1 = matrix+(j*4+i);
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p2 = matrix+(i*4+j);
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temp = *p1;
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*p1=*p2;
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*p2=temp;
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}
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}
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}
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void m4x4_orthogonal_invert(m4x4_t matrix)
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{
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float temp;
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temp = -matrix[3];
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matrix[3] = matrix[12];
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matrix[12] = temp;
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temp = -matrix[7];
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matrix[7] = matrix[13];
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matrix[13] = temp;
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temp = -matrix[11];
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matrix[11] = matrix[14];
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matrix[14] = temp;
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/*
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temp = matrix[1];
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matrix[1] = matrix[4];
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matrix[4] = temp;
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temp = matrix[2];
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matrix[2] = matrix[8];
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matrix[8] = temp;
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temp = matrix[6];
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matrix[6] = matrix[9];
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matrix[9] = temp;
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matrix[3] = -matrix[3];
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matrix[7] = -matrix[7];
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matrix[11] = -matrix[11];
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*/
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}
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float m3_det( m3x3_t mat )
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{
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float det;
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det = mat[0] * ( mat[4]*mat[8] - mat[7]*mat[5] )
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- mat[1] * ( mat[3]*mat[8] - mat[6]*mat[5] )
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+ mat[2] * ( mat[3]*mat[7] - mat[6]*mat[4] );
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return( det );
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}
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/*
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void m3_inverse( m3x3_t mr, m3x3_t ma )
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{
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float det = m3_det( ma );
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if ( fabs( det ) < 0.0005 )
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{
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m3_identity( ma );
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return;
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}
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mr[0] = ma[4]*ma[8] - ma[5]*ma[7] / det;
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mr[1] = -( ma[1]*ma[8] - ma[7]*ma[2] ) / det;
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mr[2] = ma[1]*ma[5] - ma[4]*ma[2] / det;
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mr[3] = -( ma[3]*ma[8] - ma[5]*ma[6] ) / det;
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mr[4] = ma[0]*ma[8] - ma[6]*ma[2] / det;
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mr[5] = -( ma[0]*ma[5] - ma[3]*ma[2] ) / det;
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mr[6] = ma[3]*ma[7] - ma[6]*ma[4] / det;
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mr[7] = -( ma[0]*ma[7] - ma[6]*ma[1] ) / det;
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mr[8] = ma[0]*ma[4] - ma[1]*ma[3] / det;
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}
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*/
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void m4_submat( m4x4_t mr, m3x3_t mb, int i, int j )
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{
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int ti, tj, idst, jdst;
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idst = 0;
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for ( ti = 0; ti < 4; ti++ )
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{
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if ( ti < i )
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idst = ti;
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else
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if ( ti > i )
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idst = ti-1;
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for ( tj = 0; tj < 4; tj++ )
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{
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if ( tj < j )
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jdst = tj;
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else
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if ( tj > j )
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jdst = tj-1;
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if ( ti != i && tj != j )
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mb[idst*3 + jdst] = mr[ti*4 + tj ];
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}
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}
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}
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float m4_det( m4x4_t mr )
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{
|
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float det, result = 0, i = 1;
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m3x3_t msub3;
|
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int n;
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for ( n = 0; n < 4; n++, i *= -1 )
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{
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m4_submat( mr, msub3, 0, n );
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det = m3_det( msub3 );
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result += mr[n] * det * i;
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}
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return result;
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}
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int m4x4_invert(m4x4_t matrix)
|
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{
|
|
float mdet = m4_det( matrix );
|
|
m3x3_t mtemp;
|
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int i, j, sign;
|
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m4x4_t m4x4_temp;
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if ( fabs( mdet ) < 0.0000000001 ) //% 0.0005
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return 1;
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memcpy(m4x4_temp, matrix, sizeof(m4x4_t));
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for ( i = 0; i < 4; i++ )
|
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for ( j = 0; j < 4; j++ )
|
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{
|
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sign = 1 - ( (i +j) % 2 ) * 2;
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m4_submat( m4x4_temp, mtemp, i, j );
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|
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matrix[i+j*4] = ( m3_det( mtemp ) * sign ) / mdet;
|
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}
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return 0;
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|
}
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