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

   1 /*
   2  * Sixth 3D engine. Author: Svjatoslav Agejenko.
   3  * This project is released under Creative Commons Zero (CC0) license.
   4  *
   5 *
   6  */
   7
   8 package eu.svjatoslav.sixth.e3d.math;
   9
  10 import eu.svjatoslav.sixth.e3d.geometry.Point2D;
  11 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
  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     private 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 }