/*
- * 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.
- *
+ * 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.math.Vertex;
import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.AbstractCoordinateShape;
-import eu.svjatoslav.sixth.e3d.renderer.raster.slicer.PolygonCoordinate;
import eu.svjatoslav.sixth.e3d.renderer.raster.texture.Texture;
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.
+ * If <code>true</code> then polygon borders will be drawn.
+ * It is used for debugging purposes.
*/
- public Point2D texturePoint1, texturePoint2, texturePoint3;
- private boolean showBorders = false;
+ public boolean showBorders = false;
+
private double totalTextureDistance = -1;
- public TexturedPolygon(final Point3D p1, final Point3D p2,
- final Point3D p3, final Point2D tp1, final Point2D tp2,
- final Point2D tp3, final Texture texture) {
+ public TexturedPolygon(Vertex p1, Vertex p2, Vertex p3, final Texture texture) {
super(p1, p2, p3);
-
- texturePoint1 = tp1;
- texturePoint2 = tp2;
- texturePoint3 = tp3;
-
this.texture = texture;
}
- public TexturedPolygon(final PolygonCoordinate pc1,
- final PolygonCoordinate pc2, final PolygonCoordinate pc3,
- final Texture texture) {
-
- this(pc1.space, pc2.space, pc3.space, pc1.texture, pc2.texture,
- pc3.texture, texture);
- }
-
private void computeTotalTextureDistance() {
// compute total texture distance
- totalTextureDistance = texturePoint1.getDistanceTo(texturePoint2);
- totalTextureDistance += texturePoint1.getDistanceTo(texturePoint3);
- totalTextureDistance += texturePoint2.getDistanceTo(texturePoint3);
+ totalTextureDistance = coordinates[0].textureCoordinate.getDistanceTo(coordinates[1].textureCoordinate);
+ totalTextureDistance += coordinates[0].textureCoordinate.getDistanceTo(coordinates[2].textureCoordinate);
+ totalTextureDistance += coordinates[1].textureCoordinate.getDistanceTo(coordinates[2].textureCoordinate);
}
private void drawHorizontalLine(final PolygonBorderInterpolator line1,
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)
yBottom = renderBuffer.height - 1;
// paint
- double totalVisibleDistance = projectedPoint1
- .getDistanceTo(projectedPoint2);
+ double totalVisibleDistance = projectedPoint1.getDistanceTo(projectedPoint2);
totalVisibleDistance += projectedPoint1.getDistanceTo(projectedPoint3);
totalVisibleDistance += projectedPoint2.getDistanceTo(projectedPoint3);
final TextureBitmap zoomedBitmap = texture.getZoomedBitmap(scaleFactor);
- is[0].setPoints(projectedPoint1, projectedPoint2, texturePoint1,
- texturePoint2);
- is[1].setPoints(projectedPoint1, projectedPoint3, texturePoint1,
- texturePoint3);
- is[2].setPoints(projectedPoint2, projectedPoint3, texturePoint2,
- texturePoint3);
-
- java.util.Arrays.sort(is);
+ final PolygonBorderInterpolator[] is = new PolygonBorderInterpolator[]{
+ new PolygonBorderInterpolator(), new PolygonBorderInterpolator(),
+ new PolygonBorderInterpolator()};
+
+ is[0].setPoints(projectedPoint1, projectedPoint2,
+ coordinates[0].textureCoordinate,
+ coordinates[1].textureCoordinate);
+ is[1].setPoints(projectedPoint1, projectedPoint3,
+ coordinates[0].textureCoordinate,
+ coordinates[2].textureCoordinate);
+ is[2].setPoints(projectedPoint2, projectedPoint3,
+ coordinates[1].textureCoordinate,
+ coordinates[2].textureCoordinate);
+
+ sort(is);
for (int y = yTop; y < yBottom; y++)
if (is[0].containsY(y)) {