- _mesa_dotprod_tab[VB->ObjPtr->size]( (GLfloat *) input->data,
- 4 * sizeof(GLfloat),
- VB->ObjPtr, plane );
-
- input->count = VB->ObjPtr->count;
+ _mesa_dotprod_tab[VB->AttribPtr[_TNL_ATTRIB_POS]->size]
+ ( (GLfloat *) input->data,
+ 4 * sizeof(GLfloat),
+ VB->AttribPtr[_TNL_ATTRIB_POS], plane );
+
+ input->count = VB->AttribPtr[_TNL_ATTRIB_POS]->count;
+
+ /* make sure coords are really positive
+ NOTE should avoid going through array twice */
+ coord = input->start;
+ for (i = 0; i < input->count; i++) {
+ *coord = fabsf(*coord);
+ STRIDE_F(coord, input->stride);
+ }