A bit of cleanup:

- Ditching the face vertex thing since we're not likely to use the low-quality render path in practice, and this saves a ton on extra vertex data
- No need to build a world-space bounding box per face anymore

lighting.cpp

@@ -40,44 +40,23 @@ void export_lightmap(const world_t* world, const face_t* face, const FaceBound&
 	if (face->lightmap < 0)
 		return;
 
-	const unsigned char* lightmap = &world->lightmap[face->lightmap];
-	const plane_t* plane = &world->planes[face->plane_id];
+	Vec3 minBounds = (bounds.lightmapBounds.min / 16).floor();
+	Vec3 maxBounds = (bounds.lightmapBounds.max / 16).ceil();
 
-	int width, height;
-	switch (plane->type)
-	{
-	case 0:
-	case 3:
-		// Towards X
-		width = (int)(ceil(bounds.worldBounds.max.y / 16) - floor(bounds.worldBounds.min.y / 16));
-		height = (int)(ceil(bounds.worldBounds.max.z / 16) - floor(bounds.worldBounds.min.z / 16));
-		break;
-	case 1:
-	case 4:
-		// Towards Y
-		width = (int)(ceil(bounds.worldBounds.max.x / 16) - floor(bounds.worldBounds.min.x / 16));
-		height = (int)(ceil(bounds.worldBounds.max.z / 16) - floor(bounds.worldBounds.min.z / 16));
-		break;
-	case 2:
-	case 5:
-		// Towards Z
-		width = (int)(ceil(bounds.worldBounds.max.x / 16) - floor(bounds.worldBounds.min.x / 16));
-		height = (int)(ceil(bounds.worldBounds.max.y / 16) - floor(bounds.worldBounds.min.y / 16));
-		break;
-	default:
-		printf("Error: unknown plane type %d\n", plane->type);
-		return;
-	}
+	int width = ((int)maxBounds.x - (int)minBounds.x) * 16;		// extents[0]
+	int height = ((int)maxBounds.y - (int)minBounds.y) * 16;	// extents[1]
 
-	width += 1;
+	width = (width >> 4) + 1;
+	height = (height >> 4) + 1;
 
 	char path[_MAX_PATH];
-	sprintf_s(path, _MAX_PATH, "lightmap_face%d_e%d_PT%d_%dx%d.raw", faceIdx, face->ledge_num, plane->type, width, height);
+	sprintf_s(path, _MAX_PATH, "lightmap_face%d_e%d_%dx%d.raw", faceIdx, face->ledge_num, width, height);
 	FILE* flm;
 	fopen_s(&flm, path, "wb");
 	if (!flm)
 		return;
 
+	const unsigned char* lightmap = &world->lightmap[face->lightmap];
 	for (int y = 0; y < height; ++y)
 	{
 		fwrite(&lightmap[y * width], sizeof(unsigned char), width, flm);

lighting.h

@@ -18,7 +18,6 @@ struct Surface
 
 struct FaceBound
 {
-	BoundBox worldBounds;
 	Matrix4x4 textureTransform;
 	BoundBox textureBounds;
 	Matrix4x4 lightmapTransform;

main.cpp

@@ -100,12 +100,7 @@ int process_faces(const world_t* world, const TextureList& textures)
 			const vertex_t* vertex = &world->vertices[vertIndex];
 			Vec3 vertexPoint = vertex->toVec();
 
-			// Calculate bounding box of this face
-			if (edgeListIdx == 0)
-				bounds.worldBounds.init(vertexPoint);
-			else
-				bounds.worldBounds.includePoint(vertexPoint);
-
+			// Calculate bounding boxes of this face
 			Vec3 texturePoint = bounds.textureTransform.TransformPoint(vertexPoint);
 			bounds.addTexturePoint(texturePoint.x, texturePoint.y);
 
@@ -114,10 +109,6 @@ int process_faces(const world_t* world, const TextureList& textures)
 
 			// Sum all vertices to calculate an average center point
 			vertexSum = vertexSum + vertexPoint;
-
-			ps1bsp_facevertex_t faceVertex = { 0 };
-			faceVertex.index = (unsigned short)tesselator.addVertex(vertexPoint);
-			outFaceVertices.push_back(faceVertex);
 		}
 
 		faceBounds[face] = bounds;