70 lines
1.9 KiB
Text
70 lines
1.9 KiB
Text
/**
|
|
* PANDA 3D SOFTWARE
|
|
* Copyright (c) Carnegie Mellon University. All rights reserved.
|
|
*
|
|
* All use of this software is subject to the terms of the revised BSD
|
|
* license. You should have received a copy of this license along
|
|
* with this source code in a file named "LICENSE."
|
|
*
|
|
* @file eggPolygon.I
|
|
* @author drose
|
|
* @date 1999-02-10
|
|
*/
|
|
|
|
/**
|
|
*
|
|
*/
|
|
INLINE EggPolygon::
|
|
EggPolygon(const std::string &name) : EggPrimitive(name) {
|
|
}
|
|
|
|
/**
|
|
*
|
|
*/
|
|
INLINE EggPolygon::
|
|
EggPolygon(const EggPolygon ©) : EggPrimitive(copy) {
|
|
}
|
|
|
|
/**
|
|
*
|
|
*/
|
|
INLINE EggPolygon &EggPolygon::
|
|
operator = (const EggPolygon ©) {
|
|
EggPrimitive::operator = (copy);
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
* Recalculates the normal according to the order of the vertices, and sets
|
|
* it. Returns true if the normal is computed correctly, or false if the
|
|
* polygon is degenerate and does not have a normal.
|
|
*/
|
|
INLINE bool EggPolygon::
|
|
recompute_polygon_normal(CoordinateSystem cs) {
|
|
LNormald normal;
|
|
if (calculate_normal(normal, cs)) {
|
|
set_normal(normal);
|
|
return true;
|
|
}
|
|
clear_normal();
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Subdivides the polygon into triangles and adds each one to the indicated
|
|
* container. If the polygon is already a triangle, adds an exact copy of the
|
|
* polygon to the container. Does not remove the polygon from its existing
|
|
* parent or modify it in any way.
|
|
*
|
|
* Returns true if the triangulation is successful, or false if there was some
|
|
* error (in which case the container may contain some partial triangulation).
|
|
*
|
|
* If convex_also is true, both concave and convex polygons will be subdivided
|
|
* into triangles; otherwise, only concave polygons will be subdivided, and
|
|
* convex polygons will be copied unchanged into the container.
|
|
*/
|
|
INLINE bool EggPolygon::
|
|
triangulate_into(EggGroupNode *container, bool convex_also) const {
|
|
PT(EggPolygon) copy = new EggPolygon(*this);
|
|
return copy->triangulate_poly(container, convex_also);
|
|
}
|