Improved code readability

[sixth-3d.git] / src / main / java / eu / svjatoslav / sixth / e3d / renderer / raster / shapes / basic / texturedpolygon / TexturedPolygon.java

diff --git a/src/main/java/eu/svjatoslav/sixth/e3d/renderer/raster/shapes/basic/texturedpolygon/TexturedPolygon.java b/src/main/java/eu/svjatoslav/sixth/e3d/renderer/raster/shapes/basic/texturedpolygon/TexturedPolygon.java
index ff900d8..2cd60e7 100644 (file)
--- a/src/main/java/eu/svjatoslav/sixth/e3d/renderer/raster/shapes/basic/texturedpolygon/TexturedPolygon.java
+++ b/src/main/java/eu/svjatoslav/sixth/e3d/renderer/raster/shapes/basic/texturedpolygon/TexturedPolygon.java
@@ -1,17 +1,11 @@
 /*
- * Sixth - System for data storage, computation, exploration and interaction.
- * Copyright ©2012-2016, 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.
+ * Sixth 3D engine. Author: Svjatoslav Agejenko.
+ * This project is released under Creative Commons Zero (CC0) license.
  */
-
 package eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.texturedpolygon;
 
 import eu.svjatoslav.sixth.e3d.geometry.Point2D;
 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
-import eu.svjatoslav.sixth.e3d.geometry.Polygon;
 import eu.svjatoslav.sixth.e3d.gui.RenderingContext;
 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.AbstractCoordinateShape;
 import eu.svjatoslav.sixth.e3d.renderer.raster.slicer.PolygonCoordinate;
@@ -20,17 +14,33 @@ import eu.svjatoslav.sixth.e3d.renderer.raster.texture.TextureBitmap;
 
 import java.awt.*;
 
+import static eu.svjatoslav.sixth.e3d.geometry.Polygon.pointWithinPolygon;
+import static java.util.Arrays.sort;
+
+/**
+ * Textured polygon.
+ * <p>
+ *
+ * <pre>
+ * This is how perspective-correct texture rendering is implemented:
+ * If polygon is sufficiently small, it is rendered without perspective correction.
+ * Otherwise, it is sliced into smaller polygons.
+ * </pre>
+ */
+
 public class TexturedPolygon extends AbstractCoordinateShape {
 
     public final Texture texture;
-    final PolygonBorderInterpolator[] is = new PolygonBorderInterpolator[]{
-            new PolygonBorderInterpolator(), new PolygonBorderInterpolator(),
-            new PolygonBorderInterpolator()};
     /**
      * Polygon texture coordinates.
      */
     public Point2D texturePoint1, texturePoint2, texturePoint3;
-    private boolean showBorders = false;
+
+    /**
+     * If <code>true</code> then polygon borders will be drawn.
+     * It is used for debugging purposes.
+     */
+    public boolean showBorders = false;
     private double totalTextureDistance = -1;
 
     public TexturedPolygon(final Point3D p1, final Point3D p2,
@@ -50,8 +60,8 @@ public class TexturedPolygon extends AbstractCoordinateShape {
                            final PolygonCoordinate pc2, final PolygonCoordinate pc3,
                            final Texture texture) {
 
-        this(pc1.space, pc2.space, pc3.space, pc1.texture, pc2.texture,
-                pc3.texture, texture);
+        this(pc1.spaceCoordinate, pc2.spaceCoordinate, pc3.spaceCoordinate, pc1.textureCoordinate, pc2.textureCoordinate,
+                pc3.textureCoordinate, texture);
     }
 
     private void computeTotalTextureDistance() {
@@ -105,7 +115,7 @@ public class TexturedPolygon extends AbstractCoordinateShape {
             x2 = renderBuffer.width - 1;
 
         int renderBufferOffset = ((y * renderBuffer.width) + x1) * 4;
-        final byte[] renderBufferBytes = renderBuffer.bytes;
+        final byte[] renderBufferBytes = renderBuffer.pixels;
 
         final double twidth = tx2 - tx1;
         final double theight = ty2 - ty1;
@@ -140,11 +150,11 @@ public class TexturedPolygon extends AbstractCoordinateShape {
         projectedPoint3.roundToInteger();
 
         if (mouseInteractionController != null)
-            if (renderBuffer.mouseClick != null)
-                if (Polygon.pointWithinPolygon(
-                        renderBuffer.mouseClick.coordinate, projectedPoint1,
+            if (renderBuffer.getMouseEvent() != null)
+                if (pointWithinPolygon(
+                        renderBuffer.getMouseEvent().coordinate, projectedPoint1,
                         projectedPoint2, projectedPoint3))
-                    renderBuffer.clickedItem = mouseInteractionController;
+                    renderBuffer.setCurrentObjectUnderMouseCursor(mouseInteractionController);
 
         // Show polygon boundaries (for debugging)
         if (showBorders)
@@ -175,8 +185,7 @@ public class TexturedPolygon extends AbstractCoordinateShape {
             yBottom = renderBuffer.height - 1;
 
         // paint
-        double totalVisibleDistance = projectedPoint1
-                .getDistanceTo(projectedPoint2);
+        double totalVisibleDistance = projectedPoint1.getDistanceTo(projectedPoint2);
         totalVisibleDistance += projectedPoint1.getDistanceTo(projectedPoint3);
         totalVisibleDistance += projectedPoint2.getDistanceTo(projectedPoint3);
 
@@ -186,6 +195,10 @@ public class TexturedPolygon extends AbstractCoordinateShape {
 
         final TextureBitmap zoomedBitmap = texture.getZoomedBitmap(scaleFactor);
 
+        final PolygonBorderInterpolator[] is = new PolygonBorderInterpolator[]{
+                new PolygonBorderInterpolator(), new PolygonBorderInterpolator(),
+                new PolygonBorderInterpolator()};
+
         is[0].setPoints(projectedPoint1, projectedPoint2, texturePoint1,
                 texturePoint2);
         is[1].setPoints(projectedPoint1, projectedPoint3, texturePoint1,
@@ -193,7 +206,7 @@ public class TexturedPolygon extends AbstractCoordinateShape {
         is[2].setPoints(projectedPoint2, projectedPoint3, texturePoint2,
                 texturePoint3);
 
-        java.util.Arrays.sort(is);
+        sort(is);
 
         for (int y = yTop; y < yBottom; y++)
             if (is[0].containsY(y)) {