openscenegraph
SmoothingVisitor
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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version. The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14#ifndef OSGUTIL_SMOOTHINGVISITOR
15#define OSGUTIL_SMOOTHINGVISITOR 1
16
17#include <osg/NodeVisitor>
18#include <osg/Geode>
19#include <osg/Geometry>
20
21#include <osgUtil/Export>
22
23namespace osgUtil {
24
25/** A smoothing visitor for calculating smoothed normals for
26 * osg::GeoSet's which contains surface primitives.
27 */
28class OSGUTIL_EXPORT SmoothingVisitor : public osg::NodeVisitor
29{
30 public:
31
32 /// default to traversing all children.
33 SmoothingVisitor();
34 virtual ~SmoothingVisitor();
35
36 /// smooth geoset by creating per vertex normals.
37 static void smooth(osg::Geometry& geoset, double creaseAngle=osg::PI);
38
39 /// apply smoothing method to all geometries.
40 virtual void apply(osg::Geometry& geom);
41
42 /// set the maximum angle, in radians, at which angle between adjacent triangles that normals are smoothed
43 /// for edges that greater the shared vertices are duplicated
44 void setCreaseAngle(double angle) { _creaseAngle = angle; }
45 double getCreaseAngle() const { return _creaseAngle; }
46
47 protected:
48
49 double _creaseAngle;
50
51};
52
53}
54
55#endif