/*
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.base.mathlib.MathLib;
import org.jwildfire.image.Pixel;
import org.jwildfire.image.SimpleImage;
import org.jwildfire.image.WFImage;
import com.l2fprod.common.beans.editor.ComboBoxPropertyEditor;
public class ShearTransformer extends Mesh2DTransformer {
public enum Axis {
X, Y
};
@Property(description = "X-coordinate of the effect origin")
private double centreX = 400.0;
@Property(description = "Y-coordinate of the effect origin")
private double centreY = 400.0;
@Property(description = "Shear axis", editorClass = AxisEditor.class)
private Axis axis = Axis.X;
@Property(category = PropertyCategory.SECONDARY, description = "Global zoom factor for the whole image")
@PropertyMin(0.01)
@PropertyMax(100.0)
private double zoom = 1.0;
@Property(description = "Damping of the effect", category = PropertyCategory.SECONDARY)
private double damping = -0.04;
@Property(description = "Shear amount")
private double amount = 60.0;
@Property(description = "Damping on/off", category = PropertyCategory.SECONDARY)
private boolean damp = true;
@Override
protected void performPixelTransformation(WFImage pImg) {
SimpleImage img = (SimpleImage) pImg;
if (axis == Axis.X) {
if (!damp || (Math.abs(damping) < MathLib.EPSILON))
shearX(img);
else
shearX_Damp(img);
}
else if (axis == Axis.Y) {
if (!damp || (Math.abs(damping) < MathLib.EPSILON))
shearY(img);
else
shearY_Damp(img);
}
applySmoothing(img, 1);
}
private void shearX(SimpleImage pImg) {
int width = pImg.getImageWidth();
int height = pImg.getImageHeight();
Pixel pPixel = new Pixel();
double cx = (double) width / 2.0 - 0.5;
double cy = (double) height / 2.0 - 0.5;
double oy = this.centreY - cy;
double zoom = this.zoom;
if (zoom < 0.01)
zoom = 0.01;
zoom = 1.0 / zoom;
double fshift = this.amount / (100.0 - 1.0);
double shift = 0.0 - fshift;
double w1 = (double) width - 1.0;
double h1 = (double) height - 1.0;
for (int i = 0; i < height; i++) {
double y0 = (double) i - cy;
for (int j = 0; j < width; j++) {
/* transform the point */
double x0 = (double) j - cx;
double amp = (y0 - oy) * shift;
double x = (x0 + amp) * zoom + cx;
double y = y0 * zoom + 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))));
}
pImg.setRGB(j, i, pPixel.r, pPixel.g, pPixel.b);
}
}
}
private void shearX_Damp(SimpleImage pImg) {
int width = pImg.getImageWidth();
int height = pImg.getImageHeight();
Pixel pPixel = new Pixel();
double cx = (double) width / 2.0 - 0.5;
double cy = (double) height / 2.0 - 0.5;
double ox = this.centreX - cx;
double oy = this.centreY - cy;
double zoom = this.zoom;
if (zoom < 0.01)
zoom = 0.01;
zoom = 1.0 / zoom;
double fshift = this.amount / (100.0 - 1.0);
double shift = 0.0 - fshift;
double damping = this.damping;
double w1 = (double) width - 1.0;
double h1 = (double) height - 1.0;
for (int i = 0; i < height; i++) {
double y0 = (double) i - cy;
for (int j = 0; j < width; j++) {
/* transform the point */
double x0 = (double) j - cx;
double amp = (y0 - oy) * shift;
double dl2 = x0 - ox;
if (dl2 < 0.0)
dl2 = 0.0 - dl2;
amp = amp * Math.exp(dl2 * damping);
double x = (x0 + amp) * zoom + cx;
double y = y0 * zoom + 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))));
}
pImg.setRGB(j, i, pPixel.r, pPixel.g, pPixel.b);
}
}
}
private void shearY(SimpleImage pImg) {
int width = pImg.getImageWidth();
int height = pImg.getImageHeight();
Pixel pPixel = new Pixel();
double cx = (double) width / 2.0 - 0.5;
double cy = (double) height / 2.0 - 0.5;
double ox = this.centreX - cx;
double zoom = this.zoom;
if (zoom < 0.01)
zoom = 0.01;
zoom = 1.0 / zoom;
double fshift = this.amount / (100.0 - 1.0);
double shift = 0.0 - fshift;
double w1 = (double) width - 1.0;
double h1 = (double) height - 1.0;
for (int i = 0; i < height; i++) {
double y0 = (double) i - cy;
for (int j = 0; j < width; j++) {
/* transform the point */
double x0 = (double) j - cx;
double amp = (x0 - ox) * shift;
double x = x0 * zoom + cx;
double y = (y0 + amp) * zoom + 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))));
}
pImg.setRGB(j, i, pPixel.r, pPixel.g, pPixel.b);
}
}
}
private void shearY_Damp(SimpleImage pImg) {
int width = pImg.getImageWidth();
int height = pImg.getImageHeight();
Pixel pPixel = new Pixel();
double cx = (double) width / 2.0 - 0.5;
double cy = (double) height / 2.0 - 0.5;
double ox = this.centreX - cx;
double oy = this.centreY - cy;
double zoom = this.zoom;
if (zoom < 0.01)
zoom = 0.01;
zoom = 1.0 / zoom;
double fshift = this.amount / (100.0 - 1.0);
double shift = 0.0 - fshift;
double damping = this.damping;
double w1 = (double) width - 1.0;
double h1 = (double) height - 1.0;
for (int i = 0; i < height; i++) {
double y0 = (double) i - cy;
for (int j = 0; j < width; j++) {
/* transform the point */
double x0 = (double) j - cx;
double amp = (x0 - ox) * shift;
double dl2 = y0 - oy;
if (dl2 < 0.0)
dl2 = 0.0 - dl2;
amp = amp * Math.exp(dl2 * damping);
double x = x0 * zoom + cx;
double y = (y0 + amp) * zoom + 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))));
}
pImg.setRGB(j, i, pPixel.r, pPixel.g, pPixel.b);
}
}
}
@Override
public void initDefaultParams(WFImage pImg) {
int width = pImg.getImageWidth();
int height = pImg.getImageHeight();
double rr = Math.sqrt(width * width + height * height);
centreX = Math.round((double) width / 2.0);
centreY = Math.round((double) height / 2.0);
amount = Math.round(rr / 6);
axis = Axis.X;
zoom = 1.0;
damping = -0.01;
damp = false;
}
public static class AxisEditor extends ComboBoxPropertyEditor {
public AxisEditor() {
super();
setAvailableValues(new Axis[] { Axis.X, Axis.Y });
}
}
public double getCentreX() {
return centreX;
}
public void setCentreX(double centreX) {
this.centreX = centreX;
}
public double getCentreY() {
return centreY;
}
public void setCentreY(double centreY) {
this.centreY = centreY;
}
public Axis getAxis() {
return axis;
}
public void setAxis(Axis axis) {
this.axis = axis;
}
public double getZoom() {
return zoom;
}
public void setZoom(double zoom) {
this.zoom = zoom;
}
public double getDamping() {
return damping;
}
public void setDamping(double damping) {
this.damping = damping;
}
public double getAmount() {
return amount;
}
public void setAmount(double amount) {
this.amount = amount;
}
public boolean isDamp() {
return damp;
}
public void setDamp(boolean damp) {
this.damp = damp;
}
}