CollisionPolygon¶
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class
CollisionPolygon¶ Bases:
CollisionPlaneInheritance diagram
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CollisionPolygon(LVecBase3 const &a, LVecBase3 const &b, LVecBase3 const &c, LVecBase3 const &d)¶ Creates an invalid polygon. Only used when reading from a bam file.
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static TypeHandle
get_class_type(void)¶
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std::size_t
get_num_points(void) const¶ Returns the number of vertices of the
CollisionPolygon.
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LPoint3
get_point(std::size_t n) const¶ Returns the nth vertex of the
CollisionPolygon, expressed in 3-D space.
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bool
is_concave(void) const¶ Returns true if the
CollisionPolygonappears to be concave, or false if it is safely convex.
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bool
is_valid(void) const¶ Returns true if the
CollisionPolygonis valid (that is, it has at least three vertices), or false otherwise.
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bool
verify_points(LPoint3 const &a, LPoint3 const &b, LPoint3 const &c, LPoint3 const &d)¶ Verifies that the indicated set of points will define a valid CollisionPolygon: that is, at least three non-collinear points, with no points repeated.
Verifies that the indicated set of points will define a valid CollisionPolygon: that is, at least three non-collinear points, with no points repeated.
Verifies that the indicated set of points will define a valid CollisionPolygon: that is, at least three non-collinear points, with no points repeated.
This does not check that the polygon defined is convex; that check is made later, once we have projected the points to 2-d space where the decision is easier.
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