NurbsSurfaceResult
from panda3d.core import NurbsSurfaceResult
- class NurbsSurfaceResult
Bases:
Bases:
ReferenceCountThe result of a
NurbsSurfaceEvaluator. This object represents a surface in a particular coordinate space. It can return the point and/or normal to the surface at any point.Inheritance diagram
- __init__(param0: NurbsSurfaceResult)
- eval_extended_point(u: float, v: float, d: int) float
Evaluates the surface in n-dimensional space according to the extended vertices associated with the surface in the indicated dimension.
- eval_extended_points(u: float, v: float, d: int, result: PN_stdfloat_[], num_values: int) bool
Simultaneously performs
eval_extended_point()on a contiguous sequence of dimensions. The dimensions evaluated are d through (d + num_values - 1); the results are filled into the num_values elements in the indicated result array.
- eval_normal(u: float, v: float, normal: LVecBase3) bool
Computes the normal to the surface at the indicated point in parametric time. This normal vector will not necessarily be normalized, and could be zero. See also
eval_point().
- eval_point(u: float, v: float, point: LVecBase3) bool
Computes the point on the surface corresponding to the indicated value in parametric time. Returns true if the u, v values are valid, false otherwise.
- eval_segment_extended_point(ui: int, vi: int, u: float, v: float, d: int) float
Evaluates the surface in n-dimensional space according to the extended vertices associated with the surface in the indicated dimension.
- eval_segment_extended_points(ui: int, vi: int, u: float, v: float, d: int, result: PN_stdfloat_[], num_values: int)
Simultaneously performs
eval_extended_point()on a contiguous sequence of dimensions. The dimensions evaluated are d through (d + num_values - 1); the results are filled into the num_values elements in the indicated result array.
- eval_segment_normal(ui: int, vi: int, u: float, v: float, normal: LVecBase3)
As
eval_segment_point(), but computes the normal to the surface at the indicated point. The normal vector will not necessarily be normalized, and could be zero.
- eval_segment_point(ui: int, vi: int, u: float, v: float, point: LVecBase3)
Evaluates the point on the surface corresponding to the indicated value in parametric time within the indicated surface segment. u and v should be in the range [0, 1].
The surface is internally represented as a number of connected (or possibly unconnected) piecewise continuous segments. The exact number of segments for a particular surface depends on the knot vector, and is returned by get_num_segments(). Normally,
eval_point()is used to evaluate a point along the continuous surface, but when you care more about local continuity, you can use eval_segment_point() to evaluate the points along each segment.
- get_num_u_segments() int
Returns the number of piecewise continuous segments within the surface in the U direction. This number is usually not important unless you plan to call
eval_segment_point().
- get_num_v_segments() int
Returns the number of piecewise continuous segments within the surface in the V direction. This number is usually not important unless you plan to call
eval_segment_point().
- get_segment_u(ui: int, u: float) float
Accepts a u value in the range [0, 1], and assumed to be relative to the indicated segment (as in
eval_segment_point()), and returns the corresponding u value in the entire surface (as ineval_point()).
- get_segment_v(vi: int, v: float) float
Accepts a v value in the range [0, 1], and assumed to be relative to the indicated segment (as in
eval_segment_point()), and returns the corresponding v value in the entire surface (as ineval_point()).