src/main/java/eu/svjatoslav/sixth/e3d/geometry/GeometryCoordinate.java

   1 /*
   2  * Sixth 3D engine. Copyright ©2012-2018, Svjatoslav Agejenko, svjatoslav@svjatoslav.eu
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of version 3 of the GNU Lesser General Public License
   6  * or later as published by the Free Software Foundation.
   7  *
   8  */
   9
  10 package eu.svjatoslav.sixth.e3d.geometry;
  11
  12 import eu.svjatoslav.sixth.e3d.gui.RenderingContext;
  13
  14 public class GeometryCoordinate {
  15
  16     public Point3D coordinate;
  17     public Point3D transformedCoordinate;
  18     public Point2D onScreenCoordinate;
  19
  20     int lastTransformedFrame;
  21
  22     public GeometryCoordinate() {
  23         coordinate = new Point3D();
  24         transformedCoordinate = new Point3D();
  25         onScreenCoordinate = new Point2D();
  26     }
  27
  28     public GeometryCoordinate(final Point3D location) {
  29         coordinate = location;
  30         transformedCoordinate = new Point3D();
  31         onScreenCoordinate = new Point2D();
  32     }
  33
  34     public void transform(final TransformPipe transforms,
  35                           final RenderingContext renderContext) {
  36
  37         if (lastTransformedFrame == renderContext.frameNumber)
  38             return;
  39
  40         lastTransformedFrame = renderContext.frameNumber;
  41
  42         transforms.transform(coordinate, transformedCoordinate);
  43
  44         onScreenCoordinate.x = ((transformedCoordinate.x / transformedCoordinate.z) * renderContext.zoom)
  45                 + renderContext.xCenter;
  46         onScreenCoordinate.y = ((transformedCoordinate.y / transformedCoordinate.z) * renderContext.zoom)
  47                 + renderContext.yCenter;
  48     }
  49 }