src/main/java/eu/svjatoslav/sixth/e3d/math/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.math;
  11
  12 import eu.svjatoslav.sixth.e3d.geometry.Point2D;
  13 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
  14 import eu.svjatoslav.sixth.e3d.gui.RenderingContext;
  15
  16 public class GeometryCoordinate {
  17
  18     public Point3D coordinate;
  19     public Point3D transformedCoordinate;
  20     public Point2D onScreenCoordinate;
  21
  22     private int lastTransformedFrame;
  23
  24     public GeometryCoordinate() {
  25         coordinate = new Point3D();
  26         transformedCoordinate = new Point3D();
  27         onScreenCoordinate = new Point2D();
  28     }
  29
  30     public GeometryCoordinate(final Point3D location) {
  31         coordinate = location;
  32         transformedCoordinate = new Point3D();
  33         onScreenCoordinate = new Point2D();
  34     }
  35
  36     public void transform(final TransformPipe transforms,
  37                           final RenderingContext renderContext) {
  38
  39         if (lastTransformedFrame == renderContext.frameNumber)
  40             return;
  41
  42         lastTransformedFrame = renderContext.frameNumber;
  43
  44         transforms.transform(coordinate, transformedCoordinate);
  45
  46         onScreenCoordinate.x = ((transformedCoordinate.x / transformedCoordinate.z) * renderContext.zoom)
  47                 + renderContext.xCenter;
  48         onScreenCoordinate.y = ((transformedCoordinate.y / transformedCoordinate.z) * renderContext.zoom)
  49                 + renderContext.yCenter;
  50     }
  51 }