bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/snap/RelativeScaleSnapAdvisor.java

   1 /*******************************************************************************
   2  * Copyright (c) 2020 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  *     Semantum Oy - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.scenegraph.g2d.snap;
  13
  14 import java.awt.geom.Point2D;
  15
  16 public class RelativeScaleSnapAdvisor implements ISnapAdvisor {
  17
  18     private double step;
  19
  20     public RelativeScaleSnapAdvisor(double step) {
  21         this.step = step;
  22     }
  23
  24     @Override
  25     public void snap(Point2D point) {
  26         point.setLocation(
  27                 Math.pow(1 + step, Math.round(Math.log(point.getX()) / Math.log(1 + step))),
  28                 Math.pow(1 + step, Math.round(Math.log(point.getY()) / Math.log(1 + step))));
  29     }
  30
  31     @Override
  32     public void snap(Point2D point, Point2D[] features) {
  33         snap(point);
  34     }
  35
  36 }