dhewm3/neo/cm/CollisionModel_files.cpp

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2011-11-22 21:28:15 +00:00
/*
===========================================================================
Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).
Doom 3 Source Code 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 3 of the License, or
(at your option) any later version.
Doom 3 Source Code 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 Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
===========================================================================
*/
/*
===============================================================================
Trace model vs. polygonal model collision detection.
===============================================================================
*/
#include "../idlib/precompiled.h"
#pragma hdrstop
#include "CollisionModel_local.h"
#define CM_FILE_EXT "cm"
#define CM_FILEID "CM"
#define CM_FILEVERSION "1.00"
/*
===============================================================================
Writing of collision model file
===============================================================================
*/
void CM_GetNodeBounds( idBounds *bounds, cm_node_t *node );
int CM_GetNodeContents( cm_node_t *node );
/*
================
idCollisionModelManagerLocal::WriteNodes
================
*/
void idCollisionModelManagerLocal::WriteNodes( idFile *fp, cm_node_t *node ) {
fp->WriteFloatString( "\t( %d %f )\n", node->planeType, node->planeDist );
if ( node->planeType != -1 ) {
WriteNodes( fp, node->children[0] );
WriteNodes( fp, node->children[1] );
}
}
/*
================
idCollisionModelManagerLocal::CountPolygonMemory
================
*/
int idCollisionModelManagerLocal::CountPolygonMemory( cm_node_t *node ) const {
cm_polygonRef_t *pref;
cm_polygon_t *p;
int memory;
memory = 0;
for ( pref = node->polygons; pref; pref = pref->next ) {
p = pref->p;
if ( p->checkcount == checkCount ) {
continue;
}
p->checkcount = checkCount;
memory += sizeof( cm_polygon_t ) + ( p->numEdges - 1 ) * sizeof( p->edges[0] );
}
if ( node->planeType != -1 ) {
memory += CountPolygonMemory( node->children[0] );
memory += CountPolygonMemory( node->children[1] );
}
return memory;
}
/*
================
idCollisionModelManagerLocal::WritePolygons
================
*/
void idCollisionModelManagerLocal::WritePolygons( idFile *fp, cm_node_t *node ) {
cm_polygonRef_t *pref;
cm_polygon_t *p;
int i;
for ( pref = node->polygons; pref; pref = pref->next ) {
p = pref->p;
if ( p->checkcount == checkCount ) {
continue;
}
p->checkcount = checkCount;
fp->WriteFloatString( "\t%d (", p->numEdges );
for ( i = 0; i < p->numEdges; i++ ) {
fp->WriteFloatString( " %d", p->edges[i] );
}
fp->WriteFloatString( " ) ( %f %f %f ) %f", p->plane.Normal()[0], p->plane.Normal()[1], p->plane.Normal()[2], p->plane.Dist() );
fp->WriteFloatString( " ( %f %f %f )", p->bounds[0][0], p->bounds[0][1], p->bounds[0][2] );
fp->WriteFloatString( " ( %f %f %f )", p->bounds[1][0], p->bounds[1][1], p->bounds[1][2] );
fp->WriteFloatString( " \"%s\"\n", p->material->GetName() );
}
if ( node->planeType != -1 ) {
WritePolygons( fp, node->children[0] );
WritePolygons( fp, node->children[1] );
}
}
/*
================
idCollisionModelManagerLocal::CountBrushMemory
================
*/
int idCollisionModelManagerLocal::CountBrushMemory( cm_node_t *node ) const {
cm_brushRef_t *bref;
cm_brush_t *b;
int memory;
memory = 0;
for ( bref = node->brushes; bref; bref = bref->next ) {
b = bref->b;
if ( b->checkcount == checkCount ) {
continue;
}
b->checkcount = checkCount;
memory += sizeof( cm_brush_t ) + ( b->numPlanes - 1 ) * sizeof( b->planes[0] );
}
if ( node->planeType != -1 ) {
memory += CountBrushMemory( node->children[0] );
memory += CountBrushMemory( node->children[1] );
}
return memory;
}
/*
================
idCollisionModelManagerLocal::WriteBrushes
================
*/
void idCollisionModelManagerLocal::WriteBrushes( idFile *fp, cm_node_t *node ) {
cm_brushRef_t *bref;
cm_brush_t *b;
int i;
for ( bref = node->brushes; bref; bref = bref->next ) {
b = bref->b;
if ( b->checkcount == checkCount ) {
continue;
}
b->checkcount = checkCount;
fp->WriteFloatString( "\t%d {\n", b->numPlanes );
for ( i = 0; i < b->numPlanes; i++ ) {
fp->WriteFloatString( "\t\t( %f %f %f ) %f\n", b->planes[i].Normal()[0], b->planes[i].Normal()[1], b->planes[i].Normal()[2], b->planes[i].Dist() );
}
fp->WriteFloatString( "\t} ( %f %f %f )", b->bounds[0][0], b->bounds[0][1], b->bounds[0][2] );
fp->WriteFloatString( " ( %f %f %f ) \"%s\"\n", b->bounds[1][0], b->bounds[1][1], b->bounds[1][2], StringFromContents( b->contents ) );
}
if ( node->planeType != -1 ) {
WriteBrushes( fp, node->children[0] );
WriteBrushes( fp, node->children[1] );
}
}
/*
================
idCollisionModelManagerLocal::WriteCollisionModel
================
*/
void idCollisionModelManagerLocal::WriteCollisionModel( idFile *fp, cm_model_t *model ) {
int i, polygonMemory, brushMemory;
fp->WriteFloatString( "collisionModel \"%s\" {\n", model->name.c_str() );
// vertices
fp->WriteFloatString( "\tvertices { /* numVertices = */ %d\n", model->numVertices );
for ( i = 0; i < model->numVertices; i++ ) {
fp->WriteFloatString( "\t/* %d */ ( %f %f %f )\n", i, model->vertices[i].p[0], model->vertices[i].p[1], model->vertices[i].p[2] );
}
fp->WriteFloatString( "\t}\n" );
// edges
fp->WriteFloatString( "\tedges { /* numEdges = */ %d\n", model->numEdges );
for ( i = 0; i < model->numEdges; i++ ) {
fp->WriteFloatString( "\t/* %d */ ( %d %d ) %d %d\n", i, model->edges[i].vertexNum[0], model->edges[i].vertexNum[1], model->edges[i].internal, model->edges[i].numUsers );
}
fp->WriteFloatString( "\t}\n" );
// nodes
fp->WriteFloatString( "\tnodes {\n" );
WriteNodes( fp, model->node );
fp->WriteFloatString( "\t}\n" );
// polygons
checkCount++;
polygonMemory = CountPolygonMemory( model->node );
fp->WriteFloatString( "\tpolygons /* polygonMemory = */ %d {\n", polygonMemory );
checkCount++;
WritePolygons( fp, model->node );
fp->WriteFloatString( "\t}\n" );
// brushes
checkCount++;
brushMemory = CountBrushMemory( model->node );
fp->WriteFloatString( "\tbrushes /* brushMemory = */ %d {\n", brushMemory );
checkCount++;
WriteBrushes( fp, model->node );
fp->WriteFloatString( "\t}\n" );
// closing brace
fp->WriteFloatString( "}\n" );
}
/*
================
idCollisionModelManagerLocal::WriteCollisionModelsToFile
================
*/
void idCollisionModelManagerLocal::WriteCollisionModelsToFile( const char *filename, int firstModel, int lastModel, unsigned int mapFileCRC ) {
int i;
idFile *fp;
idStr name;
name = filename;
name.SetFileExtension( CM_FILE_EXT );
common->Printf( "writing %s\n", name.c_str() );
// _D3XP was saving to fs_cdpath
fp = fileSystem->OpenFileWrite( name, "fs_devpath" );
if ( !fp ) {
common->Warning( "idCollisionModelManagerLocal::WriteCollisionModelsToFile: Error opening file %s\n", name.c_str() );
return;
}
// write file id and version
fp->WriteFloatString( "%s \"%s\"\n\n", CM_FILEID, CM_FILEVERSION );
// write the map file crc
fp->WriteFloatString( "%u\n\n", mapFileCRC );
// write the collision models
for ( i = firstModel; i < lastModel; i++ ) {
WriteCollisionModel( fp, models[ i ] );
}
fileSystem->CloseFile( fp );
}
/*
================
idCollisionModelManagerLocal::WriteCollisionModelForMapEntity
================
*/
bool idCollisionModelManagerLocal::WriteCollisionModelForMapEntity( const idMapEntity *mapEnt, const char *filename, const bool testTraceModel ) {
idFile *fp;
idStr name;
cm_model_t *model;
SetupHash();
model = CollisionModelForMapEntity( mapEnt );
model->name = filename;
name = filename;
name.SetFileExtension( CM_FILE_EXT );
common->Printf( "writing %s\n", name.c_str() );
fp = fileSystem->OpenFileWrite( name, "fs_devpath" );
if ( !fp ) {
common->Printf( "idCollisionModelManagerLocal::WriteCollisionModelForMapEntity: Error opening file %s\n", name.c_str() );
FreeModel( model );
return false;
}
// write file id and version
fp->WriteFloatString( "%s \"%s\"\n\n", CM_FILEID, CM_FILEVERSION );
// write the map file crc
fp->WriteFloatString( "%u\n\n", 0 );
// write the collision model
WriteCollisionModel( fp, model );
fileSystem->CloseFile( fp );
if ( testTraceModel ) {
idTraceModel trm;
TrmFromModel( model, trm );
}
FreeModel( model );
return true;
}
/*
===============================================================================
Loading of collision model file
===============================================================================
*/
/*
================
idCollisionModelManagerLocal::ParseVertices
================
*/
void idCollisionModelManagerLocal::ParseVertices( idLexer *src, cm_model_t *model ) {
int i;
src->ExpectTokenString( "{" );
model->numVertices = src->ParseInt();
model->maxVertices = model->numVertices;
model->vertices = (cm_vertex_t *) Mem_Alloc( model->maxVertices * sizeof( cm_vertex_t ) );
for ( i = 0; i < model->numVertices; i++ ) {
src->Parse1DMatrix( 3, model->vertices[i].p.ToFloatPtr() );
model->vertices[i].side = 0;
model->vertices[i].sideSet = 0;
model->vertices[i].checkcount = 0;
}
src->ExpectTokenString( "}" );
}
/*
================
idCollisionModelManagerLocal::ParseEdges
================
*/
void idCollisionModelManagerLocal::ParseEdges( idLexer *src, cm_model_t *model ) {
int i;
src->ExpectTokenString( "{" );
model->numEdges = src->ParseInt();
model->maxEdges = model->numEdges;
model->edges = (cm_edge_t *) Mem_Alloc( model->maxEdges * sizeof( cm_edge_t ) );
for ( i = 0; i < model->numEdges; i++ ) {
src->ExpectTokenString( "(" );
model->edges[i].vertexNum[0] = src->ParseInt();
model->edges[i].vertexNum[1] = src->ParseInt();
src->ExpectTokenString( ")" );
model->edges[i].side = 0;
model->edges[i].sideSet = 0;
model->edges[i].internal = src->ParseInt();
model->edges[i].numUsers = src->ParseInt();
model->edges[i].normal = vec3_origin;
model->edges[i].checkcount = 0;
model->numInternalEdges += model->edges[i].internal;
}
src->ExpectTokenString( "}" );
}
/*
================
idCollisionModelManagerLocal::ParseNodes
================
*/
cm_node_t *idCollisionModelManagerLocal::ParseNodes( idLexer *src, cm_model_t *model, cm_node_t *parent ) {
cm_node_t *node;
model->numNodes++;
node = AllocNode( model, model->numNodes < NODE_BLOCK_SIZE_SMALL ? NODE_BLOCK_SIZE_SMALL : NODE_BLOCK_SIZE_LARGE );
node->brushes = NULL;
node->polygons = NULL;
node->parent = parent;
src->ExpectTokenString( "(" );
node->planeType = src->ParseInt();
node->planeDist = src->ParseFloat();
src->ExpectTokenString( ")" );
if ( node->planeType != -1 ) {
node->children[0] = ParseNodes( src, model, node );
node->children[1] = ParseNodes( src, model, node );
}
return node;
}
/*
================
idCollisionModelManagerLocal::ParsePolygons
================
*/
void idCollisionModelManagerLocal::ParsePolygons( idLexer *src, cm_model_t *model ) {
cm_polygon_t *p;
int i, numEdges;
idVec3 normal;
idToken token;
if ( src->CheckTokenType( TT_NUMBER, 0, &token ) ) {
model->polygonBlock = (cm_polygonBlock_t *) Mem_Alloc( sizeof( cm_polygonBlock_t ) + token.GetIntValue() );
model->polygonBlock->bytesRemaining = token.GetIntValue();
model->polygonBlock->next = ( (byte *) model->polygonBlock ) + sizeof( cm_polygonBlock_t );
}
src->ExpectTokenString( "{" );
while ( !src->CheckTokenString( "}" ) ) {
// parse polygon
numEdges = src->ParseInt();
p = AllocPolygon( model, numEdges );
p->numEdges = numEdges;
src->ExpectTokenString( "(" );
for ( i = 0; i < p->numEdges; i++ ) {
p->edges[i] = src->ParseInt();
}
src->ExpectTokenString( ")" );
src->Parse1DMatrix( 3, normal.ToFloatPtr() );
p->plane.SetNormal( normal );
p->plane.SetDist( src->ParseFloat() );
src->Parse1DMatrix( 3, p->bounds[0].ToFloatPtr() );
src->Parse1DMatrix( 3, p->bounds[1].ToFloatPtr() );
src->ExpectTokenType( TT_STRING, 0, &token );
// get material
p->material = declManager->FindMaterial( token );
p->contents = p->material->GetContentFlags();
p->checkcount = 0;
// filter polygon into tree
R_FilterPolygonIntoTree( model, model->node, NULL, p );
}
}
/*
================
idCollisionModelManagerLocal::ParseBrushes
================
*/
void idCollisionModelManagerLocal::ParseBrushes( idLexer *src, cm_model_t *model ) {
cm_brush_t *b;
int i, numPlanes;
idVec3 normal;
idToken token;
if ( src->CheckTokenType( TT_NUMBER, 0, &token ) ) {
model->brushBlock = (cm_brushBlock_t *) Mem_Alloc( sizeof( cm_brushBlock_t ) + token.GetIntValue() );
model->brushBlock->bytesRemaining = token.GetIntValue();
model->brushBlock->next = ( (byte *) model->brushBlock ) + sizeof( cm_brushBlock_t );
}
src->ExpectTokenString( "{" );
while ( !src->CheckTokenString( "}" ) ) {
// parse brush
numPlanes = src->ParseInt();
b = AllocBrush( model, numPlanes );
b->numPlanes = numPlanes;
src->ExpectTokenString( "{" );
for ( i = 0; i < b->numPlanes; i++ ) {
src->Parse1DMatrix( 3, normal.ToFloatPtr() );
b->planes[i].SetNormal( normal );
b->planes[i].SetDist( src->ParseFloat() );
}
src->ExpectTokenString( "}" );
src->Parse1DMatrix( 3, b->bounds[0].ToFloatPtr() );
src->Parse1DMatrix( 3, b->bounds[1].ToFloatPtr() );
src->ReadToken( &token );
if ( token.type == TT_NUMBER ) {
b->contents = token.GetIntValue(); // old .cm files use a single integer
} else {
b->contents = ContentsFromString( token );
}
b->checkcount = 0;
b->primitiveNum = 0;
// filter brush into tree
R_FilterBrushIntoTree( model, model->node, NULL, b );
}
}
/*
================
idCollisionModelManagerLocal::ParseCollisionModel
================
*/
bool idCollisionModelManagerLocal::ParseCollisionModel( idLexer *src ) {
cm_model_t *model;
idToken token;
if ( numModels >= MAX_SUBMODELS ) {
common->Error( "LoadModel: no free slots" );
return false;
}
model = AllocModel();
models[numModels ] = model;
numModels++;
// parse the file
src->ExpectTokenType( TT_STRING, 0, &token );
model->name = token;
src->ExpectTokenString( "{" );
while ( !src->CheckTokenString( "}" ) ) {
src->ReadToken( &token );
if ( token == "vertices" ) {
ParseVertices( src, model );
continue;
}
if ( token == "edges" ) {
ParseEdges( src, model );
continue;
}
if ( token == "nodes" ) {
src->ExpectTokenString( "{" );
model->node = ParseNodes( src, model, NULL );
src->ExpectTokenString( "}" );
continue;
}
if ( token == "polygons" ) {
ParsePolygons( src, model );
continue;
}
if ( token == "brushes" ) {
ParseBrushes( src, model );
continue;
}
src->Error( "ParseCollisionModel: bad token \"%s\"", token.c_str() );
}
// calculate edge normals
checkCount++;
CalculateEdgeNormals( model, model->node );
// get model bounds from brush and polygon bounds
CM_GetNodeBounds( &model->bounds, model->node );
// get model contents
model->contents = CM_GetNodeContents( model->node );
// total memory used by this model
model->usedMemory = model->numVertices * sizeof(cm_vertex_t) +
model->numEdges * sizeof(cm_edge_t) +
model->polygonMemory +
model->brushMemory +
model->numNodes * sizeof(cm_node_t) +
model->numPolygonRefs * sizeof(cm_polygonRef_t) +
model->numBrushRefs * sizeof(cm_brushRef_t);
return true;
}
/*
================
idCollisionModelManagerLocal::LoadCollisionModelFile
================
*/
bool idCollisionModelManagerLocal::LoadCollisionModelFile( const char *name, unsigned int mapFileCRC ) {
idStr fileName;
idToken token;
idLexer *src;
unsigned int crc;
// load it
fileName = name;
fileName.SetFileExtension( CM_FILE_EXT );
src = new idLexer( fileName );
src->SetFlags( LEXFL_NOSTRINGCONCAT | LEXFL_NODOLLARPRECOMPILE );
if ( !src->IsLoaded() ) {
delete src;
return false;
}
if ( !src->ExpectTokenString( CM_FILEID ) ) {
common->Warning( "%s is not an CM file.", fileName.c_str() );
delete src;
return false;
}
if ( !src->ReadToken( &token ) || token != CM_FILEVERSION ) {
common->Warning( "%s has version %s instead of %s", fileName.c_str(), token.c_str(), CM_FILEVERSION );
delete src;
return false;
}
if ( !src->ExpectTokenType( TT_NUMBER, TT_INTEGER, &token ) ) {
common->Warning( "%s has no map file CRC", fileName.c_str() );
delete src;
return false;
}
crc = token.GetUnsignedLongValue();
if ( mapFileCRC && crc != mapFileCRC ) {
common->Printf( "%s is out of date\n", fileName.c_str() );
delete src;
return false;
}
// parse the file
while ( 1 ) {
if ( !src->ReadToken( &token ) ) {
break;
}
if ( token == "collisionModel" ) {
if ( !ParseCollisionModel( src ) ) {
delete src;
return false;
}
continue;
}
src->Error( "idCollisionModelManagerLocal::LoadCollisionModelFile: bad token \"%s\"", token.c_str() );
}
delete src;
return true;
}