def buildSection(self, sectionMask, cy):
vertexArrays = []
for (face, exposedFaceMask) in enumerate(self.exposedBlockMasks(sectionMask)):
blockIndices = sectionMask[1:-1, 1:-1, 1:-1] & exposedFaceMask
vertexBuffer = VertexArrayBuffer.fromIndices(face, blockIndices, False, False)
if not len(vertexBuffer.vertex):
continue
vertexBuffer.rgb[:] = faceShades[face]
vertexBuffer.alpha[:] = 0x77
vertexBuffer.vertex[..., 1] += cy << 4
vertexArrays.append(vertexBuffer)
return vertexArrays
