worldspawn/tools/vmap/bsp_scale.c

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2020-11-17 11:16:16 +00:00
/* -------------------------------------------------------------------------------
Copyright (C) 1999-2007 id Software, Inc. and contributors.
For a list of contributors, see the accompanying CONTRIBUTORS file.
This file is part of GtkRadiant.
GtkRadiant is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
GtkRadiant is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-------------------------------------------------------------------------------
This code has been altered significantly from its original form, to support
several games based on the Quake III Arena engine, in the form of "Q3Map2."
------------------------------------------------------------------------------- */
/* dependencies */
#include "vmap.h"
static void ExtrapolateTexcoords( const float *axyz, const float *ast, const float *bxyz, const float *bst, const float *cxyz, const float *cst, const float *axyz_new, float *ast_out, const float *bxyz_new, float *bst_out, const float *cxyz_new, float *cst_out ){
vec4_t scoeffs, tcoeffs;
float md;
m4x4_t solvematrix;
vec3_t norm;
vec3_t dab, dac;
VectorSubtract( bxyz, axyz, dab );
VectorSubtract( cxyz, axyz, dac );
CrossProduct( dab, dac, norm );
// assume:
// s = f(x, y, z)
// s(v + norm) = s(v) when n ortho xyz
// s(v) = DotProduct(v, scoeffs) + scoeffs[3]
// solve:
// scoeffs * (axyz, 1) == ast[0]
// scoeffs * (bxyz, 1) == bst[0]
// scoeffs * (cxyz, 1) == cst[0]
// scoeffs * (norm, 0) == 0
// scoeffs * [axyz, 1 | bxyz, 1 | cxyz, 1 | norm, 0] = [ast[0], bst[0], cst[0], 0]
solvematrix[0] = axyz[0];
solvematrix[4] = axyz[1];
solvematrix[8] = axyz[2];
solvematrix[12] = 1;
solvematrix[1] = bxyz[0];
solvematrix[5] = bxyz[1];
solvematrix[9] = bxyz[2];
solvematrix[13] = 1;
solvematrix[2] = cxyz[0];
solvematrix[6] = cxyz[1];
solvematrix[10] = cxyz[2];
solvematrix[14] = 1;
solvematrix[3] = norm[0];
solvematrix[7] = norm[1];
solvematrix[11] = norm[2];
solvematrix[15] = 0;
md = m4_det( solvematrix );
if ( md * md < 1e-10 ) {
Sys_Printf( "Cannot invert some matrix, some texcoords aren't extrapolated!" );
return;
}
m4x4_invert( solvematrix );
scoeffs[0] = ast[0];
scoeffs[1] = bst[0];
scoeffs[2] = cst[0];
scoeffs[3] = 0;
m4x4_transform_vec4( solvematrix, scoeffs );
tcoeffs[0] = ast[1];
tcoeffs[1] = bst[1];
tcoeffs[2] = cst[1];
tcoeffs[3] = 0;
m4x4_transform_vec4( solvematrix, tcoeffs );
ast_out[0] = scoeffs[0] * axyz_new[0] + scoeffs[1] * axyz_new[1] + scoeffs[2] * axyz_new[2] + scoeffs[3];
ast_out[1] = tcoeffs[0] * axyz_new[0] + tcoeffs[1] * axyz_new[1] + tcoeffs[2] * axyz_new[2] + tcoeffs[3];
bst_out[0] = scoeffs[0] * bxyz_new[0] + scoeffs[1] * bxyz_new[1] + scoeffs[2] * bxyz_new[2] + scoeffs[3];
bst_out[1] = tcoeffs[0] * bxyz_new[0] + tcoeffs[1] * bxyz_new[1] + tcoeffs[2] * bxyz_new[2] + tcoeffs[3];
cst_out[0] = scoeffs[0] * cxyz_new[0] + scoeffs[1] * cxyz_new[1] + scoeffs[2] * cxyz_new[2] + scoeffs[3];
cst_out[1] = tcoeffs[0] * cxyz_new[0] + tcoeffs[1] * cxyz_new[1] + tcoeffs[2] * cxyz_new[2] + tcoeffs[3];
}
/*
ScaleBSPMain()
amaze and confuse your enemies with wierd scaled maps!
*/
int ScaleBSPMain( int argc, char **argv ){
int i, j;
float f, a;
vec3_t scale;
vec3_t vec;
char str[ 1024 ];
int uniform, axis;
qboolean texscale;
float *old_xyzst = NULL;
float spawn_ref = 0;
/* arg checking */
if ( argc < 3 ) {
Sys_Printf( "Usage: q3map [-v] -scale [-tex] [-spawn_ref <value>] <value> <mapname>\n" );
return 0;
}
texscale = qfalse;
for ( i = 1; i < argc - 2; ++i )
{
if ( !strcmp( argv[i], "-tex" ) ) {
texscale = qtrue;
}
else if ( !strcmp( argv[i], "-spawn_ref" ) ) {
spawn_ref = atof( argv[i + 1] );
++i;
}
else{
break;
}
}
/* get scale */
// if(argc-2 >= i) // always true
scale[2] = scale[1] = scale[0] = atof( argv[ argc - 2 ] );
if ( argc - 3 >= i ) {
scale[1] = scale[0] = atof( argv[ argc - 3 ] );
}
if ( argc - 4 >= i ) {
scale[0] = atof( argv[ argc - 4 ] );
}
uniform = ( ( scale[0] == scale[1] ) && ( scale[1] == scale[2] ) );
if ( scale[0] == 0.0f || scale[1] == 0.0f || scale[2] == 0.0f ) {
Sys_Printf( "Usage: q3map [-v] -scale [-tex] [-spawn_ref <value>] <value> <mapname>\n" );
Sys_Printf( "Non-zero scale value required.\n" );
return 0;
}
/* do some path mangling */
strcpy( source, ExpandArg( argv[ argc - 1 ] ) );
StripExtension( source );
DefaultExtension( source, ".bsp" );
/* load the bsp */
Sys_Printf( "Loading %s\n", source );
LoadBSPFile( source );
ParseEntities();
/* note it */
Sys_Printf( "--- ScaleBSP ---\n" );
Sys_FPrintf( SYS_VRB, "%9d entities\n", numEntities );
/* scale entity keys */
for ( i = 0; i < numBSPEntities && i < numEntities; i++ )
{
/* scale origin */
GetVectorForKey( &entities[ i ], "origin", vec );
if ( ( vec[ 0 ] || vec[ 1 ] || vec[ 2 ] ) ) {
if ( !strncmp( ValueForKey( &entities[i], "classname" ), "info_player_", 12 ) ) {
vec[2] += spawn_ref;
}
vec[0] *= scale[0];
vec[1] *= scale[1];
vec[2] *= scale[2];
if ( !strncmp( ValueForKey( &entities[i], "classname" ), "info_player_", 12 ) ) {
vec[2] -= spawn_ref;
}
sprintf( str, "%f %f %f", vec[ 0 ], vec[ 1 ], vec[ 2 ] );
SetKeyValue( &entities[ i ], "origin", str );
}
a = FloatForKey( &entities[ i ], "angle" );
if ( a == -1 || a == -2 ) { // z scale
axis = 2;
}
else if ( fabs( sin( DEG2RAD( a ) ) ) < 0.707 ) {
axis = 0;
}
else{
axis = 1;
}
/* scale door lip */
f = FloatForKey( &entities[ i ], "lip" );
if ( f ) {
f *= scale[axis];
sprintf( str, "%f", f );
SetKeyValue( &entities[ i ], "lip", str );
}
/* scale plat height */
f = FloatForKey( &entities[ i ], "height" );
if ( f ) {
f *= scale[2];
sprintf( str, "%f", f );
SetKeyValue( &entities[ i ], "height", str );
}
// TODO maybe allow a definition file for entities to specify which values are scaled how?
}
/* scale models */
for ( i = 0; i < numBSPModels; i++ )
{
bspModels[ i ].mins[0] *= scale[0];
bspModels[ i ].mins[1] *= scale[1];
bspModels[ i ].mins[2] *= scale[2];
bspModels[ i ].maxs[0] *= scale[0];
bspModels[ i ].maxs[1] *= scale[1];
bspModels[ i ].maxs[2] *= scale[2];
}
/* scale nodes */
for ( i = 0; i < numBSPNodes; i++ )
{
bspNodes[ i ].mins[0] *= scale[0];
bspNodes[ i ].mins[1] *= scale[1];
bspNodes[ i ].mins[2] *= scale[2];
bspNodes[ i ].maxs[0] *= scale[0];
bspNodes[ i ].maxs[1] *= scale[1];
bspNodes[ i ].maxs[2] *= scale[2];
}
/* scale leafs */
for ( i = 0; i < numBSPLeafs; i++ )
{
bspLeafs[ i ].mins[0] *= scale[0];
bspLeafs[ i ].mins[1] *= scale[1];
bspLeafs[ i ].mins[2] *= scale[2];
bspLeafs[ i ].maxs[0] *= scale[0];
bspLeafs[ i ].maxs[1] *= scale[1];
bspLeafs[ i ].maxs[2] *= scale[2];
}
if ( texscale ) {
Sys_Printf( "Using texture unlocking (and probably breaking texture alignment a lot)\n" );
old_xyzst = safe_malloc( sizeof( *old_xyzst ) * numBSPDrawVerts * 5 );
for ( i = 0; i < numBSPDrawVerts; i++ )
{
old_xyzst[5 * i + 0] = bspDrawVerts[i].xyz[0];
old_xyzst[5 * i + 1] = bspDrawVerts[i].xyz[1];
old_xyzst[5 * i + 2] = bspDrawVerts[i].xyz[2];
old_xyzst[5 * i + 3] = bspDrawVerts[i].st[0];
old_xyzst[5 * i + 4] = bspDrawVerts[i].st[1];
}
}
/* scale drawverts */
for ( i = 0; i < numBSPDrawVerts; i++ )
{
bspDrawVerts[i].xyz[0] *= scale[0];
bspDrawVerts[i].xyz[1] *= scale[1];
bspDrawVerts[i].xyz[2] *= scale[2];
bspDrawVerts[i].normal[0] /= scale[0];
bspDrawVerts[i].normal[1] /= scale[1];
bspDrawVerts[i].normal[2] /= scale[2];
VectorNormalize( bspDrawVerts[i].normal, bspDrawVerts[i].normal );
}
if ( texscale ) {
for ( i = 0; i < numBSPDrawSurfaces; i++ )
{
switch ( bspDrawSurfaces[i].surfaceType )
{
case SURFACE_FACE:
case SURFACE_META:
if ( bspDrawSurfaces[i].numIndexes % 3 ) {
Error( "Not a triangulation!" );
}
for ( j = bspDrawSurfaces[i].firstIndex; j < bspDrawSurfaces[i].firstIndex + bspDrawSurfaces[i].numIndexes; j += 3 )
{
int ia = bspDrawIndexes[j] + bspDrawSurfaces[i].firstVert, ib = bspDrawIndexes[j + 1] + bspDrawSurfaces[i].firstVert, ic = bspDrawIndexes[j + 2] + bspDrawSurfaces[i].firstVert;
bspDrawVert_t *a = &bspDrawVerts[ia], *b = &bspDrawVerts[ib], *c = &bspDrawVerts[ic];
float *oa = &old_xyzst[ia * 5], *ob = &old_xyzst[ib * 5], *oc = &old_xyzst[ic * 5];
// extrapolate:
// a->xyz -> oa
// b->xyz -> ob
// c->xyz -> oc
ExtrapolateTexcoords(
&oa[0], &oa[3],
&ob[0], &ob[3],
&oc[0], &oc[3],
a->xyz, a->st,
b->xyz, b->st,
c->xyz, c->st );
}
break;
}
}
}
/* scale planes */
if ( uniform ) {
for ( i = 0; i < numBSPPlanes; i++ )
{
bspPlanes[ i ].dist *= scale[0];
}
}
else
{
for ( i = 0; i < numBSPPlanes; i++ )
{
bspPlanes[ i ].normal[0] /= scale[0];
bspPlanes[ i ].normal[1] /= scale[1];
bspPlanes[ i ].normal[2] /= scale[2];
f = 1 / VectorLength( bspPlanes[i].normal );
VectorScale( bspPlanes[i].normal, f, bspPlanes[i].normal );
bspPlanes[ i ].dist *= f;
}
}
/* scale gridsize */
GetVectorForKey( &entities[ 0 ], "gridsize", vec );
if ( ( vec[ 0 ] + vec[ 1 ] + vec[ 2 ] ) == 0.0f ) {
VectorCopy( gridSize, vec );
}
vec[0] *= scale[0];
vec[1] *= scale[1];
vec[2] *= scale[2];
sprintf( str, "%f %f %f", vec[ 0 ], vec[ 1 ], vec[ 2 ] );
SetKeyValue( &entities[ 0 ], "gridsize", str );
/* inject command line parameters */
InjectCommandLine( argv, 0, argc - 1 );
/* write the bsp */
UnparseEntities();
StripExtension( source );
DefaultExtension( source, "_s.bsp" );
Sys_Printf( "Writing %s\n", source );
WriteBSPFile( source );
/* return to sender */
return 0;
}