Lines Matching refs:du
149 GLfloat uu = (u - map->u1) * map->du;
168 GLfloat uu = (u - map->u1) * map->du;
194 GLfloat uu = (u - map->u1) * map->du;
216 GLfloat uu = (u - map->u1) * map->du;
224 GLfloat du[4], dv[4];
226 _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv,
231 du[0] = du[0]*vertex[3] - du[3]*vertex[0];
232 du[1] = du[1]*vertex[3] - du[3]*vertex[1];
233 du[2] = du[2]*vertex[3] - du[3]*vertex[2];
241 CROSS3(normal, du, dv);
