Refactoring.

[sixth-3d.git] / src / main / java / eu / svjatoslav / sixth / e3d / math / GeometryCoordinate.java

diff --git a/src/main/java/eu/svjatoslav/sixth/e3d/math/GeometryCoordinate.java b/src/main/java/eu/svjatoslav/sixth/e3d/math/GeometryCoordinate.java
new file mode 100644 (file)
index 0000000..d95717c
--- /dev/null
+++ b/src/main/java/eu/svjatoslav/sixth/e3d/math/GeometryCoordinate.java
@@ -0,0 +1,51 @@
+/*
+ * Sixth 3D engine. Copyright ©2012-2018, Svjatoslav Agejenko, svjatoslav@svjatoslav.eu
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 3 of the GNU Lesser General Public License
+ * or later as published by the Free Software Foundation.
+ *
+ */
+
+package eu.svjatoslav.sixth.e3d.math;
+
+import eu.svjatoslav.sixth.e3d.geometry.Point2D;
+import eu.svjatoslav.sixth.e3d.geometry.Point3D;
+import eu.svjatoslav.sixth.e3d.gui.RenderingContext;
+
+public class GeometryCoordinate {
+
+    public Point3D coordinate;
+    public Point3D transformedCoordinate;
+    public Point2D onScreenCoordinate;
+
+    private int lastTransformedFrame;
+
+    public GeometryCoordinate() {
+        coordinate = new Point3D();
+        transformedCoordinate = new Point3D();
+        onScreenCoordinate = new Point2D();
+    }
+
+    public GeometryCoordinate(final Point3D location) {
+        coordinate = location;
+        transformedCoordinate = new Point3D();
+        onScreenCoordinate = new Point2D();
+    }
+
+    public void transform(final TransformPipe transforms,
+                          final RenderingContext renderContext) {
+
+        if (lastTransformedFrame == renderContext.frameNumber)
+            return;
+
+        lastTransformedFrame = renderContext.frameNumber;
+
+        transforms.transform(coordinate, transformedCoordinate);
+
+        onScreenCoordinate.x = ((transformedCoordinate.x / transformedCoordinate.z) * renderContext.zoom)
+                + renderContext.xCenter;
+        onScreenCoordinate.y = ((transformedCoordinate.y / transformedCoordinate.z) * renderContext.zoom)
+                + renderContext.yCenter;
+    }
+}