Path: blob/master/src/sage/plot/plot3d/parametric_surface.pxd
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from index_face_set cimport IndexFaceSet
from transform cimport point_c, face_c
cdef class ParametricSurface(IndexFaceSet):
cdef object f
cdef object render_grid
cdef int eval_grid(self, urange, vrange) except -1
cdef int eval_c(self, point_c *res, double u, double v) except -1