1. A geometry processing engine for processing primitives in a graphics rendering pipeline, the geometry processing unit configured to: receive vertex data related to each vertex of a primitive; compute a first vector based on at least a portion of the vertex data to generate an object-space to texture-space mapping for the primitive; and transform a second vector associated with one of the vertices of the primitive from an object-space representation to a texture-space representation by transforming the object space representation by the object-space to texture-space mapping.