org.simantics.g3d.vtk/src/org/simantics/g3d/vtk/handlers/ParallelPerspectiveHandler.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.handlers;
  13
  14 import org.eclipse.core.commands.AbstractHandler;
  15 import org.eclipse.core.commands.Command;
  16 import org.eclipse.core.commands.ExecutionEvent;
  17 import org.eclipse.core.commands.ExecutionException;
  18 import org.eclipse.ui.IWorkbenchPart;
  19 import org.eclipse.ui.handlers.HandlerUtil;
  20 import org.simantics.g3d.vtk.common.VtkView;
  21 import org.simantics.utils.threads.AWTThread;
  22 import org.simantics.utils.threads.ThreadUtils;
  23
  24 import vtk.vtkCamera;
  25 import vtk.vtkRenderer;
  26
  27 public class ParallelPerspectiveHandler extends AbstractHandler {
  28
  29
  30         @Override
  31         public Object execute(ExecutionEvent event) throws ExecutionException {
  32                 Command command = event.getCommand();
  33                 boolean oldValue = HandlerUtil.toggleCommandState(command);
  34                 final boolean activate = !oldValue;
  35
  36                 final IWorkbenchPart ap = HandlerUtil.getActiveEditor(event);
  37                 final VtkView panel = (VtkView)ap.getAdapter(VtkView.class);
  38
  39                 ThreadUtils.asyncExec(AWTThread.getThreadAccess(), new Runnable() {
  40
  41                         @Override
  42                         public void run() {
  43                             vtkRenderer ren = panel.getRenderer();
  44                             vtkCamera cam = ren.GetActiveCamera();
  45                                 if (activate){
  46                                         double distance = cam.GetDistance();
  47                                         double angle = cam.GetViewAngle();
  48                                         double scale = Math.tan(Math.toRadians(angle / 2)) * distance;
  49                                         cam.SetParallelScale(scale);
  50                                         cam.SetParallelProjection(1);
  51                                         ren.ResetCameraClippingRange();
  52                                 } else {
  53                                         cam.SetParallelProjection(0);
  54                                         ren.ResetCameraClippingRange();
  55                                 }
  56                                 panel.refresh();
  57
  58                         }
  59                 });
  60
  61                 return null;
  62
  63         }
  64
  65
  66
  67 }