bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/InstancingShapeNode.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in 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.scenegraph.g2d.nodes;
  13
  14 import java.awt.Graphics2D;
  15 import java.awt.Paint;
  16 import java.awt.Shape;
  17 import java.awt.geom.AffineTransform;
  18 import java.awt.geom.Rectangle2D;
  19
  20 /**
  21  * A scene graph node that renders multiple separately transformed instances of
  22  * a {@link Shape} by optionally filling or stroking it.
  23  *
  24  * If filling is enabled, it will be performed before stroking the shape.
  25  *
  26  * @author Tuukka Lehtonen
  27  */
  28 public class InstancingShapeNode extends ShapeNode {
  29
  30     private static final long serialVersionUID = -681327976554446434L;
  31
  32     AffineTransform[] transforms = {};
  33     Paint[] paints = {};
  34
  35     @SyncField({"instances", "paints"})
  36     public void setInstances(AffineTransform[] transforms, Paint[] paints) {
  37         if (transforms.length != paints.length)
  38             throw new IllegalArgumentException("transforms.length (" + transforms.length + ") != paints.length (" + paints.length + ")");
  39
  40         this.transforms = transforms;
  41         this.paints = paints;
  42     }
  43
  44     @Override
  45     public void render(Graphics2D g2d) {
  46         if (shape == null)
  47             return;
  48         if (transforms == null || transforms.length == 0)
  49             return;
  50
  51         setupRender(g2d);
  52
  53         AffineTransform startTr = g2d.getTransform();
  54         Paint startPaint = g2d.getPaint();
  55
  56         for (int i = 0; i < transforms.length; ++i) {
  57             if (transforms[i] != null)
  58                 g2d.transform(transforms[i]);
  59
  60             if (paints[i] != null)
  61                 g2d.setPaint(paints[i]);
  62             else
  63                 g2d.setPaint(startPaint);
  64
  65             renderShape(g2d, shape);
  66
  67             g2d.setTransform(startTr);
  68         }
  69     }
  70
  71     @Override
  72     public Rectangle2D getBoundsInLocal() {
  73         if (shape == null)
  74             return null;
  75         if (transforms == null || transforms.length == 0)
  76             return null;
  77
  78         Rectangle2D result = null;
  79         Rectangle2D sb = shape.getBounds2D();
  80         for (AffineTransform at : transforms) {
  81             Rectangle2D instanceBounds = at.createTransformedShape(sb).getBounds2D();
  82             if (result == null)
  83                 result = instanceBounds;
  84             else
  85                 Rectangle2D.union(result, instanceBounds, result);
  86         }
  87
  88         return result;
  89     }
  90
  91 }