org.simantics.g3d.vtk/src/org/simantics/g3d/vtk/shape/MeshActor.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012, 2013 Association for Decentralized Information Management in
   3  * Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.g3d.vtk.shape;
  13
  14 import javax.vecmath.Tuple3d;
  15 import javax.vecmath.Vector3d;
  16
  17 import org.simantics.g3d.shape.Color4d;
  18 import org.simantics.g3d.shape.Mesh;
  19
  20 import vtk.vtkActor;
  21 import vtk.vtkDataSetMapper;
  22 import vtk.vtkIdList;
  23 import vtk.vtkPoints;
  24 import vtk.vtkPolyData;
  25 import vtk.vtkPolyDataMapper;
  26 import vtk.vtkPolyDataNormals;
  27 import vtk.vtkTriangle;
  28 import vtk.vtkUnsignedCharArray;
  29
  30 public class MeshActor extends vtkActor {
  31
  32         public void setMesh(Mesh mesh) {
  33
  34                 vtkPolyDataMapper mapper = new vtkPolyDataMapper();
  35
  36                 vtkPolyData polyData = new vtkPolyData();
  37                 polyData.Allocate(mesh.getIndices().size()/3, mesh.getIndices().size()/3);
  38
  39                 vtkTriangle triangle = new vtkTriangle();
  40         vtkIdList list = triangle.GetPointIds();
  41         for (int i = 0; i < mesh.getIndices().size(); i+=3) {
  42                 list.SetId(0, mesh.getIndices().get(i));
  43                 list.SetId(1, mesh.getIndices().get(i+1));
  44                 list.SetId(2, mesh.getIndices().get(i+2));
  45                 polyData.InsertNextCell(triangle.GetCellType(), list);
  46         }
  47         list.Delete();
  48         triangle.Delete();
  49
  50
  51         vtkPoints points = new vtkPoints();
  52         for (int i = 0; i < mesh.getVertices().size(); i++) {
  53                 Tuple3d p = mesh.getVertices().get(i);
  54                 points.InsertPoint(i, p.x, p.y, p.z);
  55         }
  56
  57         polyData.SetPoints(points);
  58         points.Delete();
  59
  60         if (mesh.getColors() != null) {
  61                 vtkUnsignedCharArray colors = new vtkUnsignedCharArray();
  62                 colors.SetName("Colors");
  63                 colors.SetNumberOfComponents(3);
  64                 colors.SetNumberOfTuples(mesh.getColors().size());
  65                 for (int i = 0; i < mesh.getColors().size(); i++) {
  66                         Color4d c = mesh.getColors().get(i);
  67                         colors.InsertTuple3(i, 255.0* c.x, 255.0 * c.y, 255.0 * c.z);
  68                 }
  69                 polyData.GetPointData().AddArray(colors);
  70                 colors.Delete();
  71
  72         }
  73
  74         boolean computeNormals = true;
  75         if (computeNormals) {
  76                 vtkPolyDataNormals normals = new vtkPolyDataNormals();
  77                 normals.SetInputData(polyData);
  78                 mapper.SetInputConnection(normals.GetOutputPort());
  79                 normals.GetOutputPort().Delete();
  80                 normals.Delete();
  81         } else {
  82                 mapper.SetInputData(polyData);
  83         }
  84
  85         if (mesh.getColors() != null) {
  86                  mapper.ScalarVisibilityOn();
  87                  mapper.SetScalarModeToUsePointFieldData();
  88                  mapper.SelectColorArray("Colors");
  89         }
  90
  91         SetMapper(mapper);
  92         mapper.Delete();
  93         polyData.GetPointData().Delete();
  94         polyData.Delete();
  95
  96         }
  97
  98 }