Break apart loops into cythonizable ones

src/mcedit2/rendering/modelmesh.pyx

@@ -36,38 +36,42 @@ class BlockModelMesh(object):
         blocktypes = self.sectionUpdate.blocktypes
         areaBlocks = self.sectionUpdate.areaBlocks
         faceQuadVerts = []
+        
+        cdef unsigned short y, z, x, ID, meta
+        cdef short dx, dy, dz,
+        cdef unsigned short nx, ny, nz, nID
 
-        for y in xrange(1, 17):
-          yield
-          for z, x in itertools.product(xrange(1, 17), xrange(1, 17)):
-            ID = areaBlocks[y, z, x]
-            if ID == 0:
-                continue
-            meta = section.Data[y-1, z-1, x-1]
+        for y in range(1, 17):
+            for z in range(1, 17):
+                for x in range(1, 17):
+                    ID = areaBlocks[y, z, x]
+                    if ID == 0:
+                        continue
+                    meta = section.Data[y-1, z-1, x-1]
 
-            block = blocktypes[ID, meta]
-            if block.renderType != 3:  # only model blocks for now
-                continue
-            nameAndState = block.internalName + block.blockState
-            quads = blockModels.cookedModels[nameAndState]
+                    block = blocktypes[ID, meta]
+                    if block.renderType != 3:  # only model blocks for now
+                        continue
+                    nameAndState = block.internalName + block.blockState
+                    quads = blockModels.cookedModels[nameAndState]
 
-            for face, xyzuvc, cullface in quads:
-                if cullface is not None:
-                    dx, dy, dz = cullface.vector
-                    nx = x + dx
-                    ny = y + dy
-                    nz = z + dz
-                    nID = areaBlocks[ny, nz, nx]
-                    if nID != 0:
-                        nBlock = blocktypes[nID]
-                        if nBlock.opaqueCube:
-                            continue
+                    for face, xyzuvc, cullface in quads:
+                        if cullface is not None:
+                            dx, dy, dz = cullface.vector
+                            nx = x + dx
+                            ny = y + dy
+                            nz = z + dz
+                            nID = areaBlocks[ny, nz, nx]
+                            if nID != 0:
+                                nBlock = blocktypes[nID]
+                                if nBlock.opaqueCube:
+                                    continue
 
-                verts = numpy.array(xyzuvc)
-                verts.shape = 1, 4, 6
-                verts[..., :3] += (x - 1, y - 1 + (cy << 4), z - 1)
-                faceQuadVerts.append(verts)
-                # log.info("Block %s:\nVertices: %s", (x-1, y-1, z-1), verts)
+                        verts = numpy.array(xyzuvc)
+                        verts.shape = 1, 4, 6
+                        verts[..., :3] += (x - 1, y - 1 + (cy << 4), z - 1)
+                        faceQuadVerts.append(verts)
+                        # log.info("Block %s:\nVertices: %s", (x-1, y-1, z-1), verts)
 
         # raise SystemExit
         if len(faceQuadVerts):