// Copyright by Barry G. Becker, 2013. Licensed under MIT License: http://www.opensource.org/licenses/MIT
package com.barrybecker4.simulation.lsystem.model;
import com.barrybecker4.simulation.common.Profiler;
import com.barrybecker4.simulation.lsystem.rendering.LSystemRenderer;
import javax.swing.JOptionPane;
import java.awt.image.BufferedImage;
/**
*
* @author Barry Becker
*/
public class LSystemModel {
public static final String DEFAULT_EXPRESSION = "F(+F)F(-F)F";
public static final int DEFAULT_ITERATIONS = 1;
public static final double DEFAULT_ANGLE = 90.0;
public static final double DEFAULT_SCALE = 0.9;
public static final double DEFAULT_SCALE_FACTOR = 0.7;
public static final int DEFAULT_SIZE = 256;
private LSystemRenderer renderer;
private int numIterations;
private double angle;
private double scale;
private double scaleFactor;
private String expression;
private boolean restartRequested = false;
public LSystemModel() {
reset();
}
public void setSize(int width, int height) {
if (width != renderer.getWidth() || height != renderer.getHeight()) {
requestRestart(width, height);
}
}
public void reset() {
numIterations = DEFAULT_ITERATIONS;
angle = DEFAULT_ANGLE;
scale = DEFAULT_SCALE;
scaleFactor = DEFAULT_SCALE_FACTOR;
expression = DEFAULT_EXPRESSION;
renderer = new LSystemRenderer(DEFAULT_SIZE, DEFAULT_SIZE, expression, numIterations, angle, scale, scaleFactor);
}
public void setNumIterations(int num) {
if (num != this.numIterations) {
numIterations = num;
requestRestart(renderer.getWidth(), renderer.getHeight());
}
}
public void setAngle(double ang) {
if (ang != angle) {
angle = ang;
requestRestart(renderer.getWidth(), renderer.getHeight());
}
}
public void setScale(double value) {
if (value != scale) {
scale = value;
requestRestart(renderer.getWidth(), renderer.getHeight());
}
}
public void setScaleFactor(double value) {
if (value != scaleFactor) {
scaleFactor = value;
requestRestart(renderer.getWidth(), renderer.getHeight());
}
}
public void setExpression(String exp) {
if (!exp.equals(expression)) {
expression = exp;
requestRestart(renderer.getWidth(), renderer.getHeight());
}
}
private void requestRestart(int width, int height) {
try {
renderer = new LSystemRenderer(width, height, expression, numIterations, angle, scale, scaleFactor);
restartRequested = true;
} catch (IllegalArgumentException e) {
JOptionPane.showMessageDialog(null, e.getMessage());
}
}
public BufferedImage getImage() {
return renderer.getImage();
}
/**
* @param timeStep number of rows to compute on this timestep.
* @return true when done computing whole renderer.
*/
public boolean timeStep(double timeStep) {
if (restartRequested) {
restartRequested = false;
renderer.reset();
Profiler.getInstance().startCalculationTime();
renderer.render();
}
return false;
}
}