mirror of https://github.com/TTimo/GtkRadiant.git
613 lines
25 KiB
C++
613 lines
25 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 "stdafx.h"
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// compute a determinant using Sarrus rule
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//++timo "inline" this with a macro
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// NOTE : the three vec3_t are understood as columns of the matrix
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vec_t SarrusDet( vec3_t a, vec3_t b, vec3_t c ){
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return a[0] * b[1] * c[2] + b[0] * c[1] * a[2] + c[0] * a[1] * b[2]
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- c[0] * b[1] * a[2] - a[1] * b[0] * c[2] - a[0] * b[2] * c[1];
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}
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// in many case we know three points A,B,C in two axis base B1 and B2
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// and we want the matrix M so that A(B1) = T * A(B2)
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// NOTE: 2D homogeneous space stuff
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// NOTE: we don't do any check to see if there's a solution or we have a particular case .. need to make sure before calling
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// NOTE: the third coord of the A,B,C point is ignored
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// NOTE: see the commented out section to fill M and D
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//++timo TODO: update the other members to use this when possible
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void MatrixForPoints( vec3_t M[3], vec3_t D[2], brushprimit_texdef_t *T ){
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// vec3_t M[3]; // columns of the matrix .. easier that way (the indexing is not standard! it's column-line .. later computations are easier that way)
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vec_t det;
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// vec3_t D[2];
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M[2][0] = 1.0f; M[2][1] = 1.0f; M[2][2] = 1.0f;
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#if 0
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// fill the data vectors
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M[0][0] = A2[0]; M[0][1] = B2[0]; M[0][2] = C2[0];
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M[1][0] = A2[1]; M[1][1] = B2[1]; M[1][2] = C2[1];
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M[2][0] = 1.0f; M[2][1] = 1.0f; M[2][2] = 1.0f;
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D[0][0] = A1[0];
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D[0][1] = B1[0];
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D[0][2] = C1[0];
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D[1][0] = A1[1];
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D[1][1] = B1[1];
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D[1][2] = C1[1];
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#endif
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// solve
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det = SarrusDet( M[0], M[1], M[2] );
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T->coords[0][0] = SarrusDet( D[0], M[1], M[2] ) / det;
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T->coords[0][1] = SarrusDet( M[0], D[0], M[2] ) / det;
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T->coords[0][2] = SarrusDet( M[0], M[1], D[0] ) / det;
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T->coords[1][0] = SarrusDet( D[1], M[1], M[2] ) / det;
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T->coords[1][1] = SarrusDet( M[0], D[1], M[2] ) / det;
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T->coords[1][2] = SarrusDet( M[0], M[1], D[1] ) / det;
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}
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//++timo replace everywhere texX by texS etc. ( ----> and in q3map !)
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// NOTE : ComputeAxisBase here and in q3map code must always BE THE SAME !
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// WARNING : special case behaviour of atan2(y,x) <-> atan(y/x) might not be the same everywhere when x == 0
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// rotation by (0,RotY,RotZ) assigns X to normal
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void ComputeAxisBase( vec3_t normal,vec3_t texS,vec3_t texT ){
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vec_t RotY,RotZ;
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// do some cleaning
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if ( fabs( normal[0] ) < 1e-6 ) {
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normal[0] = 0.0f;
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}
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if ( fabs( normal[1] ) < 1e-6 ) {
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normal[1] = 0.0f;
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}
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if ( fabs( normal[2] ) < 1e-6 ) {
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normal[2] = 0.0f;
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}
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RotY = -atan2( normal[2],sqrt( normal[1] * normal[1] + normal[0] * normal[0] ) );
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RotZ = atan2( normal[1],normal[0] );
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// rotate (0,1,0) and (0,0,1) to compute texS and texT
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texS[0] = -sin( RotZ );
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texS[1] = cos( RotZ );
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texS[2] = 0;
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// the texT vector is along -Z ( T texture coorinates axis )
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texT[0] = -sin( RotY ) * cos( RotZ );
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texT[1] = -sin( RotY ) * sin( RotZ );
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texT[2] = -cos( RotY );
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}
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void FaceToBrushPrimitFace( face_t *f ){
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vec3_t texX,texY;
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vec3_t proj;
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// ST of (0,0) (1,0) (0,1)
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vec_t ST[3][5]; // [ point index ] [ xyz ST ]
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//++timo not used as long as brushprimit_texdef and texdef are static
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/* f->brushprimit_texdef.contents=f->texdef.contents;
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f->brushprimit_texdef.flags=f->texdef.flags;
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f->brushprimit_texdef.value=f->texdef.value;
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strcpy(f->brushprimit_texdef.name,f->texdef.name); */
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#ifdef DBG_BP
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if ( f->plane.normal[0] == 0.0f && f->plane.normal[1] == 0.0f && f->plane.normal[2] == 0.0f ) {
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Sys_Printf( "Warning : f->plane.normal is (0,0,0) in FaceToBrushPrimitFace\n" );
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}
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// check d_texture
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if ( !f->d_texture ) {
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Sys_Printf( "Warning : f.d_texture is NULL in FaceToBrushPrimitFace\n" );
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return;
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}
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#endif
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// compute axis base
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ComputeAxisBase( f->plane.normal,texX,texY );
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// compute projection vector
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VectorCopy( f->plane.normal,proj );
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VectorScale( proj,f->plane.dist,proj );
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// (0,0) in plane axis base is (0,0,0) in world coordinates + projection on the affine plane
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// (1,0) in plane axis base is texX in world coordinates + projection on the affine plane
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// (0,1) in plane axis base is texY in world coordinates + projection on the affine plane
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// use old texture code to compute the ST coords of these points
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VectorCopy( proj,ST[0] );
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EmitTextureCoordinates( ST[0], f->d_texture, f );
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VectorCopy( texX,ST[1] );
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VectorAdd( ST[1],proj,ST[1] );
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EmitTextureCoordinates( ST[1], f->d_texture, f );
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VectorCopy( texY,ST[2] );
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VectorAdd( ST[2],proj,ST[2] );
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EmitTextureCoordinates( ST[2], f->d_texture, f );
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// compute texture matrix
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f->brushprimit_texdef.coords[0][2] = ST[0][3];
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f->brushprimit_texdef.coords[1][2] = ST[0][4];
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f->brushprimit_texdef.coords[0][0] = ST[1][3] - f->brushprimit_texdef.coords[0][2];
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f->brushprimit_texdef.coords[1][0] = ST[1][4] - f->brushprimit_texdef.coords[1][2];
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f->brushprimit_texdef.coords[0][1] = ST[2][3] - f->brushprimit_texdef.coords[0][2];
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f->brushprimit_texdef.coords[1][1] = ST[2][4] - f->brushprimit_texdef.coords[1][2];
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}
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// compute texture coordinates for the winding points
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void EmitBrushPrimitTextureCoordinates( face_t * f, winding_t * w ){
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vec3_t texX,texY;
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vec_t x,y;
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// compute axis base
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ComputeAxisBase( f->plane.normal,texX,texY );
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// in case the texcoords matrix is empty, build a default one
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// same behaviour as if scale[0]==0 && scale[1]==0 in old code
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if ( f->brushprimit_texdef.coords[0][0] == 0 && f->brushprimit_texdef.coords[1][0] == 0 && f->brushprimit_texdef.coords[0][1] == 0 && f->brushprimit_texdef.coords[1][1] == 0 ) {
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f->brushprimit_texdef.coords[0][0] = 1.0f;
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f->brushprimit_texdef.coords[1][1] = 1.0f;
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ConvertTexMatWithQTexture( &f->brushprimit_texdef, NULL, &f->brushprimit_texdef, f->d_texture );
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}
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int i;
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for ( i = 0 ; i < w->numpoints ; i++ )
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{
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x = DotProduct( w->points[i],texX );
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y = DotProduct( w->points[i],texY );
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#ifdef DBG_BP
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if ( g_qeglobals.bNeedConvert ) {
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// check we compute the same ST as the traditional texture computation used before
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vec_t S = f->brushprimit_texdef.coords[0][0] * x + f->brushprimit_texdef.coords[0][1] * y + f->brushprimit_texdef.coords[0][2];
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vec_t T = f->brushprimit_texdef.coords[1][0] * x + f->brushprimit_texdef.coords[1][1] * y + f->brushprimit_texdef.coords[1][2];
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if ( fabs( S - w->points[i][3] ) > 1e-2 || fabs( T - w->points[i][4] ) > 1e-2 ) {
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if ( fabs( S - w->points[i][3] ) > 1e-4 || fabs( T - w->points[i][4] ) > 1e-4 ) {
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Sys_Printf( "Warning : precision loss in brush -> brush primitive texture computation\n" );
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}
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else{
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Sys_Printf( "Warning : brush -> brush primitive texture computation bug detected\n" );
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}
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}
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}
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#endif
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w->points[i][3] = f->brushprimit_texdef.coords[0][0] * x + f->brushprimit_texdef.coords[0][1] * y + f->brushprimit_texdef.coords[0][2];
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w->points[i][4] = f->brushprimit_texdef.coords[1][0] * x + f->brushprimit_texdef.coords[1][1] * y + f->brushprimit_texdef.coords[1][2];
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}
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}
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// compute a fake shift scale rot representation from the texture matrix
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// these shift scale rot values are to be understood in the local axis base
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void TexMatToFakeTexCoords( vec_t texMat[2][3], float shift[2], float *rot, float scale[2] ){
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#ifdef DBG_BP
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// check this matrix is orthogonal
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if ( fabs( texMat[0][0] * 1.0L * texMat[0][1] + texMat[1][0] * 1.0L * texMat[1][1] ) > ZERO_EPSILON ) {
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Sys_Printf( "Warning : non orthogonal texture matrix in TexMatToFakeTexCoords\n" );
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}
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#endif
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scale[0] = sqrt( texMat[0][0] * 1.0L * texMat[0][0] + texMat[1][0] * 1.0L * texMat[1][0] );
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scale[1] = sqrt( texMat[0][1] * 1.0L * texMat[0][1] + texMat[1][1] * 1.0L * texMat[1][1] );
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#ifdef DBG_BP
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if ( scale[0] < ZERO_EPSILON || scale[1] < ZERO_EPSILON ) {
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Sys_Printf( "Warning : unexpected scale==0 in TexMatToFakeTexCoords\n" );
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}
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#endif
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// compute rotate value
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if ( fabs( texMat[0][0] ) < ZERO_EPSILON ) {
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#ifdef DBG_BP
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// check brushprimit_texdef[1][0] is not zero
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if ( fabs( texMat[1][0] ) < ZERO_EPSILON ) {
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Sys_Printf( "Warning : unexpected texdef[1][0]==0 in TexMatToFakeTexCoords\n" );
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}
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#endif
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// rotate is +-90
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if ( texMat[1][0] > 0 ) {
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*rot = 90.0f;
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}
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else{
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*rot = -90.0f;
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}
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}
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else{
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*rot = RAD2DEG( atan2( texMat[1][0] * 1.0L, texMat[0][0] * 1.0L ) );
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}
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shift[0] = -texMat[0][2];
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shift[1] = texMat[1][2];
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}
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// compute back the texture matrix from fake shift scale rot
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// the matrix returned must be understood as a qtexture_t with width=2 height=2 ( the default one )
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void FakeTexCoordsToTexMat( float shift[2], float rot, float scale[2], vec_t texMat[2][3] ){
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texMat[0][0] = scale[0] * 1.0L * cos( DEG2RAD( 1.0L * rot ) );
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texMat[1][0] = scale[0] * 1.0L * sin( DEG2RAD( 1.0L * rot ) );
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texMat[0][1] = -scale[1] * 1.0L * sin( DEG2RAD( 1.0L * rot ) );
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texMat[1][1] = scale[1] * 1.0L * cos( DEG2RAD( 1.0L * rot ) );
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texMat[0][2] = -shift[0];
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texMat[1][2] = shift[1];
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}
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// convert a texture matrix between two qtexture_t
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// if NULL for qtexture_t, basic 2x2 texture is assumed ( straight mapping between s/t coordinates and geometric coordinates )
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void ConvertTexMatWithQTexture( vec_t texMat1[2][3], qtexture_t *qtex1, vec_t texMat2[2][3], qtexture_t *qtex2 ){
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float s1,s2;
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s1 = ( qtex1 ? static_cast<float>( qtex1->width ) : 2.0f ) / ( qtex2 ? static_cast<float>( qtex2->width ) : 2.0f );
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s2 = ( qtex1 ? static_cast<float>( qtex1->height ) : 2.0f ) / ( qtex2 ? static_cast<float>( qtex2->height ) : 2.0f );
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texMat2[0][0] = s1 * texMat1[0][0];
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texMat2[0][1] = s1 * texMat1[0][1];
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texMat2[0][2] = s1 * texMat1[0][2];
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texMat2[1][0] = s2 * texMat1[1][0];
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texMat2[1][1] = s2 * texMat1[1][1];
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texMat2[1][2] = s2 * texMat1[1][2];
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}
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void ConvertTexMatWithQTexture( brushprimit_texdef_t *texMat1, qtexture_t *qtex1, brushprimit_texdef_t *texMat2, qtexture_t *qtex2 ){
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ConvertTexMatWithQTexture( texMat1->coords, qtex1, texMat2->coords, qtex2 );
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}
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// used for texture locking
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// will move the texture according to a geometric vector
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void ShiftTextureGeometric_BrushPrimit( face_t *f, vec3_t delta ){
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vec3_t texS,texT;
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vec_t tx,ty;
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vec3_t M[3]; // columns of the matrix .. easier that way
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vec_t det;
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vec3_t D[2];
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// compute plane axis base ( doesn't change with translation )
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ComputeAxisBase( f->plane.normal, texS, texT );
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// compute translation vector in plane axis base
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tx = DotProduct( delta, texS );
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ty = DotProduct( delta, texT );
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// fill the data vectors
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M[0][0] = tx; M[0][1] = 1.0f + tx; M[0][2] = tx;
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M[1][0] = ty; M[1][1] = ty; M[1][2] = 1.0f + ty;
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M[2][0] = 1.0f; M[2][1] = 1.0f; M[2][2] = 1.0f;
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D[0][0] = f->brushprimit_texdef.coords[0][2];
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D[0][1] = f->brushprimit_texdef.coords[0][0] + f->brushprimit_texdef.coords[0][2];
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D[0][2] = f->brushprimit_texdef.coords[0][1] + f->brushprimit_texdef.coords[0][2];
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D[1][0] = f->brushprimit_texdef.coords[1][2];
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D[1][1] = f->brushprimit_texdef.coords[1][0] + f->brushprimit_texdef.coords[1][2];
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D[1][2] = f->brushprimit_texdef.coords[1][1] + f->brushprimit_texdef.coords[1][2];
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// solve
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det = SarrusDet( M[0], M[1], M[2] );
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f->brushprimit_texdef.coords[0][0] = SarrusDet( D[0], M[1], M[2] ) / det;
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f->brushprimit_texdef.coords[0][1] = SarrusDet( M[0], D[0], M[2] ) / det;
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f->brushprimit_texdef.coords[0][2] = SarrusDet( M[0], M[1], D[0] ) / det;
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f->brushprimit_texdef.coords[1][0] = SarrusDet( D[1], M[1], M[2] ) / det;
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f->brushprimit_texdef.coords[1][1] = SarrusDet( M[0], D[1], M[2] ) / det;
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f->brushprimit_texdef.coords[1][2] = SarrusDet( M[0], M[1], D[1] ) / det;
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}
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// shift a texture (texture adjustments) along it's current texture axes
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// x and y are geometric values, which we must compute as ST increments
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// this depends on the texture size and the pixel/texel ratio
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void ShiftTextureRelative_BrushPrimit( face_t *f, float x, float y ){
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float s,t;
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// as a ratio against texture size
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// the scale of the texture is not relevant here (we work directly on a transformation from the base vectors)
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s = ( x * 2.0 ) / (float)f->d_texture->width;
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t = ( y * 2.0 ) / (float)f->d_texture->height;
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f->brushprimit_texdef.coords[0][2] -= s;
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f->brushprimit_texdef.coords[1][2] -= t;
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}
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// TTimo: FIXME: I don't like that, it feels broken
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// (and it's likely that it's not used anymore)
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// best fitted 2D vector is x.X+y.Y
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void ComputeBest2DVector( vec3_t v, vec3_t X, vec3_t Y, int &x, int &y ){
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double sx,sy;
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sx = DotProduct( v, X );
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sy = DotProduct( v, Y );
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if ( fabs( sy ) > fabs( sx ) ) {
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x = 0;
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if ( sy > 0.0 ) {
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y = 1;
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}
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else{
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y = -1;
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}
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}
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else
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{
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y = 0;
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if ( sx > 0.0 ) {
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x = 1;
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}
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else{
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x = -1;
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}
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}
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}
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//++timo FIXME quick'n dirty hack, doesn't care about current texture settings (angle)
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// can be improved .. bug #107311
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// mins and maxs are the face bounding box
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//++timo fixme: we use the face info, mins and maxs are irrelevant
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void Face_FitTexture_BrushPrimit( face_t *f, vec3_t mins, vec3_t maxs, int nHeight, int nWidth ){
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vec3_t BBoxSTMin, BBoxSTMax;
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winding_t *w;
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int i,j;
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vec_t val;
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vec3_t M[3],D[2];
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// vec3_t N[2],Mf[2];
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brushprimit_texdef_t N;
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vec3_t Mf[2];
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// we'll be working on a standardized texture size
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// ConvertTexMatWithQTexture( &f->brushprimit_texdef, f->d_texture, &f->brushprimit_texdef, NULL );
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// compute the BBox in ST coords
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EmitBrushPrimitTextureCoordinates( f, f->face_winding );
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ClearBounds( BBoxSTMin, BBoxSTMax );
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w = f->face_winding;
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for ( i = 0 ; i < w->numpoints ; i++ )
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{
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// AddPointToBounds in 2D on (S,T) coordinates
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for ( j = 0 ; j < 2 ; j++ )
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{
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val = w->points[i][j + 3];
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if ( val < BBoxSTMin[j] ) {
|
|
BBoxSTMin[j] = val;
|
|
}
|
|
if ( val > BBoxSTMax[j] ) {
|
|
BBoxSTMax[j] = val;
|
|
}
|
|
}
|
|
}
|
|
// we have the three points of the BBox (BBoxSTMin[0].BBoxSTMin[1]) (BBoxSTMax[0],BBoxSTMin[1]) (BBoxSTMin[0],BBoxSTMax[1]) in ST space
|
|
// the BP matrix we are looking for gives (0,0) (nwidth,0) (0,nHeight) coordinates in (Sfit,Tfit) space to these three points
|
|
// we have A(Sfit,Tfit) = (0,0) = Mf * A(TexS,TexT) = N * M * A(TexS,TexT) = N * A(S,T)
|
|
// so we solve the system for N and then Mf = N * M
|
|
M[0][0] = BBoxSTMin[0]; M[0][1] = BBoxSTMax[0]; M[0][2] = BBoxSTMin[0];
|
|
M[1][0] = BBoxSTMin[1]; M[1][1] = BBoxSTMin[1]; M[1][2] = BBoxSTMax[1];
|
|
D[0][0] = 0.0f; D[0][1] = nWidth; D[0][2] = 0.0f;
|
|
D[1][0] = 0.0f; D[1][1] = 0.0f; D[1][2] = nHeight;
|
|
MatrixForPoints( M, D, &N );
|
|
|
|
#if 0
|
|
// FIT operation gives coordinates of three points of the bounding box in (S',T'), our target axis base
|
|
// A(S',T')=(0,0) B(S',T')=(nWidth,0) C(S',T')=(0,nHeight)
|
|
// and we have them in (S,T) axis base: A(S,T)=(BBoxSTMin[0],BBoxSTMin[1]) B(S,T)=(BBoxSTMax[0],BBoxSTMin[1]) C(S,T)=(BBoxSTMin[0],BBoxSTMax[1])
|
|
// we compute the N transformation so that: A(S',T') = N * A(S,T)
|
|
VectorSet( N[0], ( BBoxSTMax[0] - BBoxSTMin[0] ) / (float)nWidth, 0.0f, BBoxSTMin[0] );
|
|
VectorSet( N[1], 0.0f, ( BBoxSTMax[1] - BBoxSTMin[1] ) / (float)nHeight, BBoxSTMin[1] );
|
|
#endif
|
|
|
|
// the final matrix is the product (Mf stands for Mfit)
|
|
Mf[0][0] = N.coords[0][0] * f->brushprimit_texdef.coords[0][0] + N.coords[0][1] * f->brushprimit_texdef.coords[1][0];
|
|
Mf[0][1] = N.coords[0][0] * f->brushprimit_texdef.coords[0][1] + N.coords[0][1] * f->brushprimit_texdef.coords[1][1];
|
|
Mf[0][2] = N.coords[0][0] * f->brushprimit_texdef.coords[0][2] + N.coords[0][1] * f->brushprimit_texdef.coords[1][2] + N.coords[0][2];
|
|
Mf[1][0] = N.coords[1][0] * f->brushprimit_texdef.coords[0][0] + N.coords[1][1] * f->brushprimit_texdef.coords[1][0];
|
|
Mf[1][1] = N.coords[1][0] * f->brushprimit_texdef.coords[0][1] + N.coords[1][1] * f->brushprimit_texdef.coords[1][1];
|
|
Mf[1][2] = N.coords[1][0] * f->brushprimit_texdef.coords[0][2] + N.coords[1][1] * f->brushprimit_texdef.coords[1][2] + N.coords[1][2];
|
|
// copy back
|
|
VectorCopy( Mf[0], f->brushprimit_texdef.coords[0] );
|
|
VectorCopy( Mf[1], f->brushprimit_texdef.coords[1] );
|
|
// handle the texture size
|
|
// ConvertTexMatWithQTexture( &f->brushprimit_texdef, NULL, &f->brushprimit_texdef, f->d_texture );
|
|
}
|
|
|
|
void BrushPrimitFaceToFace( face_t *f ){
|
|
#if 0
|
|
// we have parsed brush primitives and need conversion back to standard format
|
|
// NOTE: converting back is a quick hack, there's some information lost and we can't do anything about it
|
|
// FIXME: if we normalize the texture matrix to a standard 2x2 size, we end up with wrong scaling
|
|
// I tried various tweaks, no luck .. seems shifting is lost
|
|
brushprimit_texdef_t aux;
|
|
ConvertTexMatWithQTexture( &face->brushprimit_texdef, face->d_texture, &aux, NULL );
|
|
TexMatToFakeTexCoords( aux.coords, face->texdef.shift, &face->texdef.rotate, face->texdef.scale );
|
|
face->texdef.scale[0] /= 2.0;
|
|
face->texdef.scale[1] /= 2.0;
|
|
#else
|
|
// new method by divVerent@alientrap.org: Shift and scale no longer get lost when opening a BP map in texdef mode.
|
|
vec3_t texX,texY;
|
|
vec3_t proj;
|
|
vec_t ST[3][5];
|
|
|
|
ComputeAxisBase( f->plane.normal,texX,texY );
|
|
VectorCopy( f->plane.normal,proj );
|
|
VectorScale( proj,f->plane.dist,proj );
|
|
VectorCopy( proj,ST[0] );
|
|
VectorCopy( texX,ST[1] );
|
|
VectorAdd( ST[1],proj,ST[1] );
|
|
VectorCopy( texY,ST[2] );
|
|
VectorAdd( ST[2],proj,ST[2] );
|
|
|
|
ST[0][3] = f->brushprimit_texdef.coords[0][2];
|
|
ST[0][4] = f->brushprimit_texdef.coords[1][2];
|
|
ST[1][3] = f->brushprimit_texdef.coords[0][0] + ST[0][3];
|
|
ST[1][4] = f->brushprimit_texdef.coords[1][0] + ST[0][4];
|
|
ST[2][3] = f->brushprimit_texdef.coords[0][1] + ST[0][3];
|
|
ST[2][4] = f->brushprimit_texdef.coords[1][1] + ST[0][4];
|
|
|
|
Face_TexdefFromTextureCoordinates( ST[0], ST[1], ST[2], f->d_texture, f );
|
|
#endif
|
|
}
|
|
|
|
// TEXTURE LOCKING -----------------------------------------------------------------------------------------------------
|
|
// (Relevant to the editor only?)
|
|
|
|
// internally used for texture locking on rotation and flipping
|
|
// the general algorithm is the same for both lockings, it's only the geometric transformation part that changes
|
|
// so I wanted to keep it in a single function
|
|
// if there are more linear transformations that need the locking, going to a C++ or code pointer solution would be best
|
|
// (but right now I want to keep brush_primit.cpp striclty C)
|
|
|
|
qboolean txlock_bRotation;
|
|
|
|
// rotation locking params
|
|
int txl_nAxis;
|
|
float txl_fDeg;
|
|
vec3_t txl_vOrigin;
|
|
|
|
// flip locking params
|
|
vec3_t txl_matrix[3];
|
|
vec3_t txl_origin;
|
|
|
|
void TextureLockTransformation_BrushPrimit( face_t *f ){
|
|
vec3_t Orig,texS,texT; // axis base of initial plane
|
|
// used by transformation algo
|
|
vec3_t temp; int j;
|
|
vec3_t vRotate; // rotation vector
|
|
|
|
vec3_t rOrig,rvecS,rvecT; // geometric transformation of (0,0) (1,0) (0,1) { initial plane axis base }
|
|
vec3_t rNormal,rtexS,rtexT; // axis base for the transformed plane
|
|
vec3_t lOrig,lvecS,lvecT; // [2] are not used ( but usefull for debugging )
|
|
vec3_t M[3];
|
|
vec_t det;
|
|
vec3_t D[2];
|
|
|
|
// compute plane axis base
|
|
ComputeAxisBase( f->plane.normal, texS, texT );
|
|
VectorSet( Orig, 0.0f, 0.0f, 0.0f );
|
|
|
|
// compute coordinates of (0,0) (1,0) (0,1) ( expressed in initial plane axis base ) after transformation
|
|
// (0,0) (1,0) (0,1) ( expressed in initial plane axis base ) <-> (0,0,0) texS texT ( expressed world axis base )
|
|
// input: Orig, texS, texT (and the global locking params)
|
|
// ouput: rOrig, rvecS, rvecT, rNormal
|
|
if ( txlock_bRotation ) {
|
|
// rotation vector
|
|
VectorSet( vRotate, 0.0f, 0.0f, 0.0f );
|
|
vRotate[txl_nAxis] = txl_fDeg;
|
|
VectorRotateOrigin( Orig, vRotate, txl_vOrigin, rOrig );
|
|
VectorRotateOrigin( texS, vRotate, txl_vOrigin, rvecS );
|
|
VectorRotateOrigin( texT, vRotate, txl_vOrigin, rvecT );
|
|
// compute normal of plane after rotation
|
|
VectorRotate( f->plane.normal, vRotate, rNormal );
|
|
}
|
|
else
|
|
{
|
|
VectorSubtract( Orig, txl_origin, temp );
|
|
for ( j = 0 ; j < 3 ; j++ )
|
|
rOrig[j] = DotProduct( temp, txl_matrix[j] ) + txl_origin[j];
|
|
VectorSubtract( texS, txl_origin, temp );
|
|
for ( j = 0 ; j < 3 ; j++ )
|
|
rvecS[j] = DotProduct( temp, txl_matrix[j] ) + txl_origin[j];
|
|
VectorSubtract( texT, txl_origin, temp );
|
|
for ( j = 0 ; j < 3 ; j++ )
|
|
rvecT[j] = DotProduct( temp, txl_matrix[j] ) + txl_origin[j];
|
|
// we also need the axis base of the target plane, apply the transformation matrix to the normal too..
|
|
for ( j = 0 ; j < 3 ; j++ )
|
|
rNormal[j] = DotProduct( f->plane.normal, txl_matrix[j] );
|
|
}
|
|
|
|
// compute rotated plane axis base
|
|
ComputeAxisBase( rNormal, rtexS, rtexT );
|
|
// compute S/T coordinates of the three points in rotated axis base ( in M matrix )
|
|
lOrig[0] = DotProduct( rOrig, rtexS );
|
|
lOrig[1] = DotProduct( rOrig, rtexT );
|
|
lvecS[0] = DotProduct( rvecS, rtexS );
|
|
lvecS[1] = DotProduct( rvecS, rtexT );
|
|
lvecT[0] = DotProduct( rvecT, rtexS );
|
|
lvecT[1] = DotProduct( rvecT, rtexT );
|
|
M[0][0] = lOrig[0]; M[1][0] = lOrig[1]; M[2][0] = 1.0f;
|
|
M[0][1] = lvecS[0]; M[1][1] = lvecS[1]; M[2][1] = 1.0f;
|
|
M[0][2] = lvecT[0]; M[1][2] = lvecT[1]; M[2][2] = 1.0f;
|
|
// fill data vector
|
|
D[0][0] = f->brushprimit_texdef.coords[0][2];
|
|
D[0][1] = f->brushprimit_texdef.coords[0][0] + f->brushprimit_texdef.coords[0][2];
|
|
D[0][2] = f->brushprimit_texdef.coords[0][1] + f->brushprimit_texdef.coords[0][2];
|
|
D[1][0] = f->brushprimit_texdef.coords[1][2];
|
|
D[1][1] = f->brushprimit_texdef.coords[1][0] + f->brushprimit_texdef.coords[1][2];
|
|
D[1][2] = f->brushprimit_texdef.coords[1][1] + f->brushprimit_texdef.coords[1][2];
|
|
// solve
|
|
det = SarrusDet( M[0], M[1], M[2] );
|
|
f->brushprimit_texdef.coords[0][0] = SarrusDet( D[0], M[1], M[2] ) / det;
|
|
f->brushprimit_texdef.coords[0][1] = SarrusDet( M[0], D[0], M[2] ) / det;
|
|
f->brushprimit_texdef.coords[0][2] = SarrusDet( M[0], M[1], D[0] ) / det;
|
|
f->brushprimit_texdef.coords[1][0] = SarrusDet( D[1], M[1], M[2] ) / det;
|
|
f->brushprimit_texdef.coords[1][1] = SarrusDet( M[0], D[1], M[2] ) / det;
|
|
f->brushprimit_texdef.coords[1][2] = SarrusDet( M[0], M[1], D[1] ) / det;
|
|
}
|
|
|
|
// texture locking
|
|
// called before the points on the face are actually rotated
|
|
void RotateFaceTexture_BrushPrimit( face_t *f, int nAxis, float fDeg, vec3_t vOrigin ){
|
|
// this is a placeholder to call the general texture locking algorithm
|
|
txlock_bRotation = true;
|
|
txl_nAxis = nAxis;
|
|
txl_fDeg = fDeg;
|
|
VectorCopy( vOrigin, txl_vOrigin );
|
|
TextureLockTransformation_BrushPrimit( f );
|
|
}
|
|
|
|
// compute the new brush primit texture matrix for a transformation matrix and a flip order flag (change plane orientation)
|
|
// this matches the select_matrix algo used in select.cpp
|
|
// this needs to be called on the face BEFORE any geometric transformation
|
|
// it will compute the texture matrix that will represent the same texture on the face after the geometric transformation is done
|
|
void ApplyMatrix_BrushPrimit( face_t *f, vec3_t matrix[3], vec3_t origin ){
|
|
// this is a placeholder to call the general texture locking algorithm
|
|
txlock_bRotation = false;
|
|
VectorCopy( matrix[0], txl_matrix[0] );
|
|
VectorCopy( matrix[1], txl_matrix[1] );
|
|
VectorCopy( matrix[2], txl_matrix[2] );
|
|
VectorCopy( origin, txl_origin );
|
|
TextureLockTransformation_BrushPrimit( f );
|
|
}
|
|
|
|
// don't do C==A!
|
|
void BPMatMul( vec_t A[2][3], vec_t B[2][3], vec_t C[2][3] ){
|
|
C[0][0] = A[0][0] * B[0][0] + A[0][1] * B[1][0];
|
|
C[1][0] = A[1][0] * B[0][0] + A[1][1] * B[1][0];
|
|
C[0][1] = A[0][0] * B[0][1] + A[0][1] * B[1][1];
|
|
C[1][1] = A[1][0] * B[0][1] + A[1][1] * B[1][1];
|
|
C[0][2] = A[0][0] * B[0][2] + A[0][1] * B[1][2] + A[0][2];
|
|
C[1][2] = A[1][0] * B[0][2] + A[1][1] * B[1][2] + A[1][2];
|
|
}
|
|
|
|
void BPMatDump( vec_t A[2][3] ){
|
|
Sys_Printf( "%g %g %g\n%g %g %g\n0 0 1\n", A[0][0], A[0][1], A[0][2], A[1][0], A[1][1], A[1][2] );
|
|
}
|
|
|
|
void BPMatRotate( vec_t A[2][3], float theta ){
|
|
vec_t m[2][3];
|
|
vec_t aux[2][3];
|
|
memset( &m, 0, sizeof( vec_t ) * 6 );
|
|
m[0][0] = cos( theta * Q_PI / 180.0 );
|
|
m[0][1] = -sin( theta * Q_PI / 180.0 );
|
|
m[1][0] = -m[0][1];
|
|
m[1][1] = m[0][0];
|
|
BPMatMul( A, m, aux );
|
|
BPMatCopy( aux,A );
|
|
}
|
|
|
|
// get the relative axes of the current texturing
|
|
void BrushPrimit_GetRelativeAxes( face_t *f, vec3_t vecS, vec3_t vecT ){
|
|
vec_t vS[2],vT[2];
|
|
// first we compute them as expressed in plane axis base
|
|
// BP matrix has coordinates of plane axis base expressed in geometric axis base
|
|
// so we use the line vectors
|
|
vS[0] = f->brushprimit_texdef.coords[0][0];
|
|
vS[1] = f->brushprimit_texdef.coords[0][1];
|
|
vT[0] = f->brushprimit_texdef.coords[1][0];
|
|
vT[1] = f->brushprimit_texdef.coords[1][1];
|
|
// now compute those vectors in geometric space
|
|
vec3_t texS, texT; // axis base of the plane (geometric)
|
|
ComputeAxisBase( f->plane.normal, texS, texT );
|
|
// vecS[] = vS[0].texS[] + vS[1].texT[]
|
|
// vecT[] = vT[0].texS[] + vT[1].texT[]
|
|
vecS[0] = vS[0] * texS[0] + vS[1] * texT[0];
|
|
vecS[1] = vS[0] * texS[1] + vS[1] * texT[1];
|
|
vecS[2] = vS[0] * texS[2] + vS[1] * texT[2];
|
|
vecT[0] = vT[0] * texS[0] + vT[1] * texT[0];
|
|
vecT[1] = vT[0] * texS[1] + vT[1] * texT[1];
|
|
vecT[2] = vT[0] * texS[2] + vT[1] * texT[2];
|
|
}
|
|
|
|
// GL matrix 4x4 product (3D homogeneous matrix)
|
|
// NOTE: the crappy thing is that GL doesn't follow the standard convention [line][column]
|
|
// otherwise it's all good
|
|
void GLMatMul( vec_t M[4][4], vec_t A[4], vec_t B[4] ){
|
|
unsigned short i,j;
|
|
for ( i = 0; i < 4; i++ )
|
|
{
|
|
B[i] = 0.0;
|
|
for ( j = 0; j < 4; j++ )
|
|
{
|
|
B[i] += M[j][i] * A[j];
|
|
}
|
|
}
|
|
}
|
|
|
|
qboolean IsBrushPrimitMode(){
|
|
return( g_qeglobals.m_bBrushPrimitMode );
|
|
}
|