Prevent 16-bit overflow when storing face area; fixes wildly inconsistent tessellation LOD calculations

main.cpp

@@ -152,8 +152,8 @@ int process_faces(const world_t* world, const TextureList& textures)
 
 		outFace.numFaceVertices = (unsigned char)(outFaceVertices.size() - outFace.firstFaceVertex);
 		outFace.center = (vertexSum / face->ledge_num).convertWorldPosition();
-		float area = computeFaceArea(world, face);	// TODO: divide by number of polygons
-		outFace.center.pad = (short)(sqrt(area));
+		float area = computeFaceArea(world, face);
+		outFace.center.pad = (short)(area / 100);
 		outFaces.push_back(outFace);
 	}
 
@@ -285,6 +285,7 @@ int process_faces(const world_t* world, const TextureList& textures)
 		}
 
 		outFace->numPolygons = (unsigned char)(outPolygons.size() - outFace->firstPolygon);
+		outFace->center.pad = (short)sqrt((double)outFace->center.pad * 100 / outFace->numPolygons);
 	}
 
 	printf("Converting data...\n");

ps1bsp.h

@@ -95,9 +95,9 @@ typedef struct
 	unsigned char b : 5;
 } ps1bsp_facevertex_t;
 
-#define SURF_DRAWSKY		0x2
-#define SURF_DRAWLIQUID		0x4
-#define SURF_DRAWWATER		0x8
+#define SURF_DRAWSKY		0x4
+#define SURF_DRAWLIQUID		0x8
+#define SURF_DRAWWATER		0x10
 
 // High quality: Face -> polygons -> polygon vertex indices (index + UV + light) -> vertices
 // Low quality: Face -> face vertex indices (index + color) -> vertices