/*
* Copyright (c) 2009 Piotr Piastucki
*
* This file is part of Patchca CAPTCHA library.
*
* Patchca 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 3 of the License, or
* (at your option) any later version.
*
* Patchca 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 Patchca. If not, see <http://www.gnu.org/licenses/>.
*/
package com.xiongyingqi.captcha.filter.library;
public class WobbleImageOp extends AbstractTransformImageOp {
private double xWavelength;
private double yWavelength;
private double xAmplitude;
private double yAmplitude;
private double xRandom;
private double yRandom;
private double xScale;
private double yScale;
public WobbleImageOp() {
xWavelength = 15;
yWavelength = 15;
xAmplitude = 4.0;
yAmplitude = 3.0;
xScale = 1.0;
yScale = 1.0;
xRandom = 3 * Math.random();
yRandom = 10 * Math.random();
}
public double getxWavelength() {
return xWavelength;
}
public void setxWavelength(double xWavelength) {
this.xWavelength = xWavelength;
}
public double getyWavelength() {
return yWavelength;
}
public void setyWavelength(double yWavelength) {
this.yWavelength = yWavelength;
}
public double getxAmplitude() {
return xAmplitude;
}
public void setxAmplitude(double xAmplitude) {
this.xAmplitude = xAmplitude;
}
public double getyAmplitude() {
return yAmplitude;
}
public void setyAmplitude(double yAmplitude) {
this.yAmplitude = yAmplitude;
}
public double getxScale() {
return xScale;
}
public void setxScale(double xScale) {
this.xScale = xScale;
}
public double getyScale() {
return yScale;
}
public void setyScale(double yScale) {
this.yScale = yScale;
}
@Override
protected void transform(int x, int y, double[] t) {
double tx = Math.cos((double) (xScale * x + y) / xWavelength + xRandom);
double ty = Math.sin((double) (yScale * y + x) / yWavelength + yRandom);
t[0] = x + xAmplitude * tx;
t[1] = y + yAmplitude * ty;
}
}