/*
JWildfire - an image and animation processor written in Java
Copyright (C) 1995-2011 Andreas Maschke
This is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser
General Public License as published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this software;
if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jwildfire.transform;
import org.jwildfire.base.Property;
import org.jwildfire.base.PropertyCategory;
import org.jwildfire.base.PropertyMax;
import org.jwildfire.base.PropertyMin;
import org.jwildfire.base.Tools;
import org.jwildfire.image.Pixel;
import org.jwildfire.image.SimpleImage;
import org.jwildfire.image.WFImage;
public class BlackholeTransformer extends Mesh2DTransformer {
@Property(category = PropertyCategory.PRIMARY, description = "How many pixels are translated at the centre")
private double amount = 50.0;
@Property(category = PropertyCategory.SECONDARY, description = "Global zoom factor for the whole image")
@PropertyMin(0.01)
@PropertyMax(100.0)
private double zoom = 1.0;
@Property(category = PropertyCategory.PRIMARY, description = "X-coordinate of the centre")
private int centreX = 400;
@Property(category = PropertyCategory.PRIMARY, description = "Y-coordinate of the centre")
private int centreY = 400;
@Override
protected void performPixelTransformation(WFImage pImg) {
SimpleImage img = (SimpleImage) pImg;
double cx = centreX - 0.5;
double cy = centreY - 0.5;
double rZoom = 1.0 / zoom;
int width = pImg.getImageWidth();
int height = pImg.getImageHeight();
double w1 = (double) width - 1.0;
double h1 = (double) height - 1.0;
Pixel pPixel = new Pixel();
for (int pY = 0; pY < height; pY++) {
for (int pX = 0; pX < width; pX++) {
/* transform the point */
double x0 = pX - cx;
double y0 = pY - cy;
double rr = Math.sqrt(x0 * x0 + y0 * y0);
x0 *= rZoom;
y0 *= rZoom;
double scl;
if (rr != 0.0)
scl = (rr + amount) / rr;
else
scl = 0.0;
double x = x0 * scl + cx;
double y = y0 * scl + cy;
/* render it */
double xi = Tools.fmod33(x);
double yi = Tools.fmod33(y);
if ((x < 0.0) || (x > w1) || (y < 0.0) || (y > h1)) {
pPixel.r = pPixel.g = pPixel.b = 0;
}
else {
readSrcPixels(x, y);
pPixel.r = roundColor(((1.0 - yi) * ((1.0 - xi) * (srcP.r) + xi * (srcQ.r)) + yi
* ((1.0 - xi) * (srcR.r) + xi * (srcS.r))));
pPixel.g = roundColor(((1.0 - yi) * ((1.0 - xi) * (srcP.g) + xi * (srcQ.g)) + yi
* ((1.0 - xi) * (srcR.g) + xi * (srcS.g))));
pPixel.b = roundColor(((1.0 - yi) * ((1.0 - xi) * (srcP.b) + xi * (srcQ.b)) + yi
* ((1.0 - xi) * (srcR.b) + xi * (srcS.b))));
}
img.setRGB(pX, pY, pPixel.r, pPixel.g, pPixel.b);
}
}
}
@Override
public void initDefaultParams(WFImage pImg) {
int width = pImg.getImageWidth();
int height = pImg.getImageHeight();
zoom = 1.4;
centreX = (int) (width / 2.1 + 0.5);
centreY = (int) (height / 1.9 + 0.5);
double rr = Math.sqrt(width * width + height * height);
amount = rr / 10.0;
}
public double getAmount() {
return amount;
}
public void setAmount(double amount) {
this.amount = amount;
}
public double getZoom() {
return zoom;
}
public void setZoom(double zoom) {
this.zoom = zoom;
}
public int getCentreX() {
return centreX;
}
public void setCentreX(int centreX) {
this.centreX = centreX;
}
public int getCentreY() {
return centreY;
}
public void setCentreY(int centreY) {
this.centreY = centreY;
}
}