Lines Matching refs:du
132 GLfloat uu = (u - map->u1) * map->du;
152 GLfloat uu = (u - map->u1) * map->du;
178 GLfloat uu = (u - map->u1) * map->du;
201 GLfloat uu = (u - map->u1) * map->du;
209 GLfloat du[4], dv[4];
211 _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv,
216 du[0] = du[0]*vertex[3] - du[3]*vertex[0];
217 du[1] = du[1]*vertex[3] - du[3]*vertex[1];
218 du[2] = du[2]*vertex[3] - du[3]*vertex[2];
226 CROSS3(&normal[0].f, du, dv);
