Moved osgUtil::PolytopeIntersector, osgUtil::PlaneIntersector and osgUtil::LineSegmentIntersector out from include/osgUtil/IntersecionVisitor into their own seperate files.

2006-11-28 16:30:38 +00:00
parent 345810ef22
commit a2e79f6a38
15 changed files with 1065 additions and 906 deletions
--- a/src/osgUtil/PlaneIntersector.cpp
+++ b/src/osgUtil/PlaneIntersector.cpp
@@ -0,0 +1,124 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * OpenSceneGraph Public License for more details.
+*/
+
+
+#include <osgUtil/PlaneIntersector>
+
+#include <osg/Geometry>
+#include <osg/Notify>
+#include <osg/io_utils>
+#include <osg/TriangleFunctor>
+
+using namespace osgUtil;
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+//  PlaneIntersector
+//
+PlaneIntersector::PlaneIntersector(const osg::Plane& plane, const osg::Polytope& boundingPolytope):
+    _parent(0),
+    _plane(plane),
+    _polytope(boundingPolytope)
+{
+}
+
+PlaneIntersector::PlaneIntersector(CoordinateFrame cf, const osg::Plane& plane, const osg::Polytope& boundingPolytope):
+    Intersector(cf),
+    _parent(0),
+    _plane(plane),
+    _polytope(boundingPolytope)
+{
+}
+
+Intersector* PlaneIntersector::clone(osgUtil::IntersectionVisitor& iv)
+{
+    if (_coordinateFrame==MODEL && iv.getModelMatrix()==0)
+    {
+        osg::ref_ptr<PlaneIntersector> pi = new PlaneIntersector(_plane, _polytope);
+        pi->_parent = this;
+        return pi.release();
+    }
+
+    // compute the matrix that takes this Intersector from its CoordinateFrame into the local MODEL coordinate frame
+    // that geometry in the scene graph will always be in.
+    osg::Matrix matrix;
+    switch (_coordinateFrame)
+    {
+        case(WINDOW): 
+            if (iv.getWindowMatrix()) matrix.preMult( *iv.getWindowMatrix() );
+            if (iv.getProjectionMatrix()) matrix.preMult( *iv.getProjectionMatrix() );
+            if (iv.getViewMatrix()) matrix.preMult( *iv.getViewMatrix() );
+            if (iv.getModelMatrix()) matrix.preMult( *iv.getModelMatrix() );
+            break;
+        case(PROJECTION): 
+            if (iv.getProjectionMatrix()) matrix.preMult( *iv.getProjectionMatrix() );
+            if (iv.getViewMatrix()) matrix.preMult( *iv.getViewMatrix() );
+            if (iv.getModelMatrix()) matrix.preMult( *iv.getModelMatrix() );
+            break;
+        case(VIEW): 
+            if (iv.getViewMatrix()) matrix.preMult( *iv.getViewMatrix() );
+            if (iv.getModelMatrix()) matrix.preMult( *iv.getModelMatrix() );
+            break;
+        case(MODEL):
+            if (iv.getModelMatrix()) matrix = *iv.getModelMatrix();
+            break;
+    }
+
+    osg::Plane plane = _plane;
+    plane.transformProvidingInverse(matrix);
+
+    osg::Polytope transformedPolytope;
+    transformedPolytope.setAndTransformProvidingInverse(_polytope, matrix);
+
+    osg::ref_ptr<PlaneIntersector> pi = new PlaneIntersector(plane, transformedPolytope);
+    pi->_parent = this;
+    return pi.release();
+}
+
+bool PlaneIntersector::enter(const osg::Node& node)
+{
+    return !node.isCullingActive() ||
+           ( _plane.intersect(node.getBound())==0 && _polytope.contains(node.getBound()) );
+}
+
+
+void PlaneIntersector::leave()
+{
+    // do nothing.
+}
+
+
+void PlaneIntersector::intersect(osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable)
+{
+    osg::notify(osg::NOTICE)<<"PlaneIntersector::intersect(osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable)"<<std::endl;
+
+    if ( !_plane.intersect( drawable->getBound() ) ) return;
+    if ( !_polytope.contains( drawable->getBound() ) ) return;
+
+    osg::notify(osg::NOTICE)<<"Succed PlaneIntersector::intersect(osgUtil::IntersectionVisitor& iv, osg::Drawable* drawable)"<<std::endl;
+
+    Intersection hit;
+    hit.nodePath = iv.getNodePath();
+    hit.drawable = drawable;
+    
+    insertIntersection(hit);
+}
+
+
+void PlaneIntersector::reset()
+{
+    Intersector::reset();
+    
+    _intersections.clear();
+}