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 package eu.svjatoslav.sixth.e3d.math;
   6
   7 import eu.svjatoslav.sixth.e3d.geometry.Point2D;
   8 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
   9 import eu.svjatoslav.sixth.e3d.gui.RenderingContext;
  10
  11 public class GeometryCoordinate {
  12
  13     public Point3D coordinate;
  14     public Point3D transformedCoordinate;
  15     public Point2D onScreenCoordinate;
  16
  17     private int lastTransformedFrame;
  18
  19     public GeometryCoordinate() {
  20         coordinate = new Point3D();
  21         transformedCoordinate = new Point3D();
  22         onScreenCoordinate = new Point2D();
  23     }
  24
  25     public GeometryCoordinate(final Point3D location) {
  26         coordinate = location;
  27         transformedCoordinate = new Point3D();
  28         onScreenCoordinate = new Point2D();
  29     }
  30
  31     public void transform(final TransformPipe transforms,
  32                           final RenderingContext renderContext) {
  33
  34         if (lastTransformedFrame == renderContext.frameNumber)
  35             return;
  36
  37         lastTransformedFrame = renderContext.frameNumber;
  38
  39         transforms.transform(coordinate, transformedCoordinate);
  40
  41         onScreenCoordinate.x = ((transformedCoordinate.x / transformedCoordinate.z) * renderContext.zoom)
  42                 + renderContext.xCenter;
  43         onScreenCoordinate.y = ((transformedCoordinate.y / transformedCoordinate.z) * renderContext.zoom)
  44                 + renderContext.yCenter;
  45     }
  46 }