hello world

2026-03-19 16:39:24 +01:00 · 2011-11-22 15:28:15 -06:00
commit fb1609f554
2155 changed files with 1017022 additions and 0 deletions
--- a/neo/renderer/tr_polytope.cpp
+++ b/neo/renderer/tr_polytope.cpp
@@ -0,0 +1,111 @@
+/*
+===========================================================================
+
+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.
+
+===========================================================================
+*/
+
+#include "../idlib/precompiled.h"
+#pragma hdrstop
+
+#include "tr_local.h"
+
+#define MAX_POLYTOPE_PLANES		6
+
+/*
+=====================
+R_PolytopeSurface
+
+Generate vertexes and indexes for a polytope, and optionally returns the polygon windings.
+The positive sides of the planes will be visible.
+=====================
+*/
+srfTriangles_t *R_PolytopeSurface( int numPlanes, const idPlane *planes, idWinding **windings ) {
+	int i, j;
+	srfTriangles_t *tri;
+	idFixedWinding planeWindings[MAX_POLYTOPE_PLANES];
+	int numVerts, numIndexes;
+
+	if ( numPlanes > MAX_POLYTOPE_PLANES ) {
+		common->Error( "R_PolytopeSurface: more than %d planes", MAX_POLYTOPE_PLANES );
+	}
+
+	numVerts = 0;
+	numIndexes = 0;
+	for ( i = 0; i < numPlanes; i++ ) {
+		const idPlane &plane = planes[i];
+		idFixedWinding &w = planeWindings[i];
+
+		w.BaseForPlane( plane );
+		for ( j = 0; j < numPlanes; j++ ) {
+			const idPlane &plane2 = planes[j];
+			if ( j == i ) {
+				continue;
+			}
+			if ( !w.ClipInPlace( -plane2, ON_EPSILON ) ) {
+				break;
+			}
+		}
+		if ( w.GetNumPoints() <= 2 ) {
+			continue;
+		}
+		numVerts += w.GetNumPoints();
+		numIndexes += ( w.GetNumPoints() - 2 ) * 3;
+	}
+
+	// allocate the surface
+	tri = R_AllocStaticTriSurf();
+	R_AllocStaticTriSurfVerts( tri, numVerts );
+	R_AllocStaticTriSurfIndexes( tri, numIndexes );
+
+	// copy the data from the windings
+	for ( i = 0; i < numPlanes; i++ ) {
+		idFixedWinding &w = planeWindings[i];
+		if ( !w.GetNumPoints() ) {
+			continue;
+		}
+		for ( j = 0 ; j < w.GetNumPoints() ; j++ ) {
+			tri->verts[tri->numVerts + j ].Clear();
+			tri->verts[tri->numVerts + j ].xyz = w[j].ToVec3();
+		}
+
+		for ( j = 1 ; j < w.GetNumPoints() - 1 ; j++ ) {
+			tri->indexes[ tri->numIndexes + 0 ] = tri->numVerts;
+			tri->indexes[ tri->numIndexes + 1 ] = tri->numVerts + j;
+			tri->indexes[ tri->numIndexes + 2 ] = tri->numVerts + j + 1;
+			tri->numIndexes += 3;
+		}
+		tri->numVerts += w.GetNumPoints();
+
+		// optionally save the winding
+		if ( windings ) {
+			windings[i] = new idWinding( w.GetNumPoints() );
+			*windings[i] = w;
+		}
+	}
+
+	R_BoundTriSurf( tri );
+
+	return tri;
+}