Developer Documentation
PolyMesh.cc
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41 
42 
51 //== INCLUDES =================================================================
52 
54 
55 #include <ACG/Scenegraph/MaterialNode.hh>
56 #include <ACG/Scenegraph/ManipulatorNode.hh>
57 #include <ACG/Scenegraph/StatusNodesT.hh>
58 #include <ACG/QtScenegraph/QtTranslationManipulatorNode.hh>
59 
60 PolyMeshObject::PolyMeshObject(const PolyMeshObject& _object) : MeshObject< PolyMesh >(_object) {
61 
62 }
63 
64 
65 PolyMeshObject::PolyMeshObject(DataType _typeId) : MeshObject< PolyMesh >(_typeId) {
66 
67 }
68 
69 
71 
72 }
73 
75  PolyMeshObject* object = new PolyMeshObject(*this );
76  return object;
77 }
78 
80 ACG::Vec3d PolyMeshObject::refinePick(ACG::SceneGraph::PickTarget _pickTarget, const ACG::Vec3d _hitPoint, const ACG::Vec3d _start , const ACG::Vec3d _dir, const unsigned int _targetIdx ) {
81  if ( _pickTarget == ACG::SceneGraph::PICK_FACE) {
82  //don't refine poly faces
83  return _hitPoint;
84  }
85 
86  if ( _pickTarget == ACG::SceneGraph::PICK_EDGE) {
87  // get picked edge handle
88  PolyMesh::EdgeHandle eh = mesh()->edge_handle(_targetIdx);
89  if(eh.is_valid())
90  {
91  PolyMesh::HalfedgeHandle heh = mesh()->halfedge_handle(eh,0);
92 
93  //get vertices of the edge
94  PolyMesh::VertexHandle vhbegin = mesh()->to_vertex_handle(heh);
95  PolyMesh::VertexHandle vhend = mesh()->from_vertex_handle(heh);
96  ACG::Vec3d edgeStart = mesh()->point(vhbegin);
97  ACG::Vec3d edgeEnd = mesh()->point(vhend);
98 
99  //retrieve the point on the edge that is closest to the backprojected hitpoint
100  ACG::Vec3d hitPointNew;
101  ACG::Geometry::distPointLineSquared(_hitPoint,edgeStart,edgeEnd,&hitPointNew);
102 
103 
104  return hitPointNew;
105  }
106  }
107 
108  if ( _pickTarget == ACG::SceneGraph::PICK_VERTEX) {
109  // get picked vertex handle
110  PolyMesh::VertexHandle vh = mesh()->vertex_handle(_targetIdx);
111  if(vh.is_valid())
112  {
113  ACG::Vec3d hitpointNew = mesh()->point(vh);
114 
115  //just return the vertex position
116  return hitpointNew;
117  }
118  }
119 
120  return _hitPoint;
121 }
122 
123 
124 //=============================================================================
125 
126 
127 
Vec::value_type distPointLineSquared(const Vec &_p, const Vec &_v0, const Vec &_v1, Vec *_min_v)
squared distance from point _p to line segment (_v0,_v1)
Definition: Algorithms.cc:290
picks edges (may not be implemented for all nodes)
Definition: PickTarget.hh:80
picks faces (should be implemented for all nodes)
Definition: PickTarget.hh:78
Type for a Meshobject containing a poly mesh.
Definition: PolyMesh.hh:65
virtual ~PolyMeshObject()
destructor
Definition: PolyMesh.cc:70
Predefined datatypes.
Definition: DataTypes.hh:83
PolyMesh * mesh()
return a pointer to the mesh
PickTarget
What target to use for picking.
Definition: PickTarget.hh:73
picks verices (may not be implemented for all nodes)
Definition: PickTarget.hh:82
ACG::Vec3d refinePick(ACG::SceneGraph::PickTarget _pickTarget, const ACG::Vec3d _hitPoint, const ACG::Vec3d _start, const ACG::Vec3d _dir, const unsigned int _targetIdx)
Refine picking on triangle meshes.
Definition: PolyMesh.cc:80
BaseObject * copy()
Definition: PolyMesh.cc:74
PolyMeshObject(const PolyMeshObject &_object)
copy constructor
Definition: PolyMesh.cc:60
Kernel::VertexHandle VertexHandle
Handle for referencing the corresponding item.
Definition: PolyMeshT.hh:136