00001 // Filename: eggPolygon.I 00002 // Created by: drose (10Feb99) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) Carnegie Mellon University. All rights reserved. 00008 // 00009 // All use of this software is subject to the terms of the revised BSD 00010 // license. You should have received a copy of this license along 00011 // with this source code in a file named "LICENSE." 00012 // 00013 //////////////////////////////////////////////////////////////////// 00014 00015 00016 //////////////////////////////////////////////////////////////////// 00017 // Function: EggPolygon::Constructor 00018 // Access: Published 00019 // Description: 00020 //////////////////////////////////////////////////////////////////// 00021 INLINE EggPolygon:: 00022 EggPolygon(const string &name) : EggPrimitive(name) { 00023 } 00024 00025 //////////////////////////////////////////////////////////////////// 00026 // Function: EggPolygon::Copy constructor 00027 // Access: Published 00028 // Description: 00029 //////////////////////////////////////////////////////////////////// 00030 INLINE EggPolygon:: 00031 EggPolygon(const EggPolygon ©) : EggPrimitive(copy) { 00032 } 00033 00034 //////////////////////////////////////////////////////////////////// 00035 // Function: EggPolygon::Copy assignment operator 00036 // Access: Published 00037 // Description: 00038 //////////////////////////////////////////////////////////////////// 00039 INLINE EggPolygon &EggPolygon:: 00040 operator = (const EggPolygon ©) { 00041 EggPrimitive::operator = (copy); 00042 return *this; 00043 } 00044 00045 //////////////////////////////////////////////////////////////////// 00046 // Function: EggPolygon::recompute_polygon_normal 00047 // Access: Published 00048 // Description: Recalculates the normal according to the order of the 00049 // vertices, and sets it. Returns true if the normal is 00050 // computed correctly, or false if the polygon is 00051 // degenerate and does not have a normal. 00052 //////////////////////////////////////////////////////////////////// 00053 INLINE bool EggPolygon:: 00054 recompute_polygon_normal(CoordinateSystem cs) { 00055 LNormald normal; 00056 if (calculate_normal(normal, cs)) { 00057 set_normal(normal); 00058 return true; 00059 } 00060 clear_normal(); 00061 return false; 00062 } 00063 00064 //////////////////////////////////////////////////////////////////// 00065 // Function: EggPolygon::triangulate_into 00066 // Access: Published 00067 // Description: Subdivides the polygon into triangles and adds each 00068 // one to the indicated container. If the polygon is 00069 // already a triangle, adds an exact copy of the polygon 00070 // to the container. Does not remove the polygon from 00071 // its existing parent or modify it in any way. 00072 // 00073 // Returns true if the triangulation is successful, or 00074 // false if there was some error (in which case the 00075 // container may contain some partial triangulation). 00076 // 00077 // If convex_also is true, both concave and convex 00078 // polygons will be subdivided into triangles; 00079 // otherwise, only concave polygons will be subdivided, 00080 // and convex polygons will be copied unchanged into the 00081 // container. 00082 //////////////////////////////////////////////////////////////////// 00083 INLINE bool EggPolygon:: 00084 triangulate_into(EggGroupNode *container, bool convex_also) const { 00085 PT(EggPolygon) copy = new EggPolygon(*this); 00086 return copy->triangulate_poly(container, convex_also); 00087 }