Developer Documentation
PolyMesh.cc
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46 * $Date: 2015-07-16 16:48:42 +0200 (Do, 16 Jul 2015) $ *
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49 
58 //== INCLUDES =================================================================
59 
61 
62 
63 PolyMeshObject::PolyMeshObject(const PolyMeshObject& _object) : MeshObject< PolyMesh >(_object) {
64 
65 }
66 
67 
68 PolyMeshObject::PolyMeshObject(DataType _typeId) : MeshObject< PolyMesh >(_typeId) {
69 
70 }
71 
72 
74 
75 }
76 
78  PolyMeshObject* object = new PolyMeshObject(*this );
79  return object;
80 }
81 
83 ACG::Vec3d PolyMeshObject::refinePick(ACG::SceneGraph::PickTarget _pickTarget, const ACG::Vec3d _hitPoint, const ACG::Vec3d _start , const ACG::Vec3d _dir, const unsigned int _targetIdx ) {
84  if ( _pickTarget == ACG::SceneGraph::PICK_FACE) {
85  //don't refine poly faces
86  return _hitPoint;
87  }
88 
89  if ( _pickTarget == ACG::SceneGraph::PICK_EDGE) {
90  // get picked edge handle
91  PolyMesh::EdgeHandle eh = mesh()->edge_handle(_targetIdx);
92  if(eh.is_valid())
93  {
94  PolyMesh::HalfedgeHandle heh = mesh()->halfedge_handle(eh,0);
95 
96  //get vertices of the edge
97  PolyMesh::VertexHandle vhbegin = mesh()->to_vertex_handle(heh);
98  PolyMesh::VertexHandle vhend = mesh()->from_vertex_handle(heh);
99  ACG::Vec3d edgeStart = mesh()->point(vhbegin);
100  ACG::Vec3d edgeEnd = mesh()->point(vhend);
101 
102  //retrieve the point on the edge that is closest to the backprojected hitpoint
103  ACG::Vec3d hitPointNew;
104  ACG::Geometry::distPointLineSquared(_hitPoint,edgeStart,edgeEnd,&hitPointNew);
105 
106 
107  return hitPointNew;
108  }
109  }
110 
111  if ( _pickTarget == ACG::SceneGraph::PICK_VERTEX) {
112  // get picked vertex handle
113  PolyMesh::VertexHandle vh = mesh()->vertex_handle(_targetIdx);
114  if(vh.is_valid())
115  {
116  ACG::Vec3d hitpointNew = mesh()->point(vh);
117 
118  //just return the vertex position
119  return hitpointNew;
120  }
121  }
122 
123  return _hitPoint;
124 }
125 
126 
127 //=============================================================================
128 
129 
130 
Predefined datatypes.
Definition: DataTypes.hh:96
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:300
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:83
PolyMesh * mesh()
return a pointer to the mesh
PickTarget
What target to use for picking.
Definition: BaseNode.hh:99
BaseObject * copy()
Definition: PolyMesh.cc:77
Kernel::VertexHandle VertexHandle
Handle for referencing the corresponding item.
Definition: PolyMeshT.hh:139
picks verices (may not be implemented for all nodes)
Definition: BaseNode.hh:108
virtual ~PolyMeshObject()
destructor
Definition: PolyMesh.cc:73
picks edges (may not be implemented for all nodes)
Definition: BaseNode.hh:106
Type for a Meshobject containing a poly mesh.
Definition: PolyMesh.hh:70
picks faces (should be implemented for all nodes)
Definition: BaseNode.hh:104
PolyMeshObject(const PolyMeshObject &_object)
copy constructor
Definition: PolyMesh.cc:63