mirror of
https://github.com/curioustorvald/Terrarum.git
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059abff814
Former-commit-id: 1647fa32ef6894bd7db44f741f07c2f4dcdf9054 Former-commit-id: 0e5810dcfbe1fd59b13e7cabe9f1e93c5542da2d
912 lines
21 KiB
Java
912 lines
21 KiB
Java
package org.newdawn.slick.particles;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.util.ArrayList;
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import org.newdawn.slick.Color;
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import org.newdawn.slick.Image;
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import org.newdawn.slick.SlickException;
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import org.newdawn.slick.geom.Vector2f;
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import org.newdawn.slick.util.FastTrig;
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import org.newdawn.slick.util.Log;
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/**
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* An emitter than can be externally configured. This configuration can also be
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* saved/loaded using the ParticleIO class.
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*
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* @see ParticleIO
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*
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* @author kevin
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*/
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public class ConfigurableEmitter implements ParticleEmitter {
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/** The path from which the images should be loaded */
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private static String relativePath = "";
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/**
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* Set the path from which images should be loaded
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*
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* @param path
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* The path from which images should be loaded
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*/
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public static void setRelativePath(String path) {
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if (!path.endsWith("/")) {
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path += "/";
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}
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relativePath = path;
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}
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/** The spawn interval range property - how often spawn happens */
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public Range spawnInterval = new Range(100, 100);
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/** The spawn count property - how many particles are spawned each time */
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public Range spawnCount = new Range(5, 5);
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/** The initial life of the new pixels */
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public Range initialLife = new Range(1000, 1000);
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/** The initial size of the new pixels */
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public Range initialSize = new Range(10, 10);
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/** The offset from the x position */
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public Range xOffset = new Range(0, 0);
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/** The offset from the y position */
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public Range yOffset = new Range(0, 0);
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/** The spread of the particles */
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public RandomValue spread = new RandomValue(360);
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/** The angular offset */
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public SimpleValue angularOffset = new SimpleValue(0);
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/** The initial distance of the particles */
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public Range initialDistance = new Range(0, 0);
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/** The speed particles fly out */
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public Range speed = new Range(50, 50);
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/** The growth factor on the particles */
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public SimpleValue growthFactor = new SimpleValue(0);
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/** The factor of gravity to apply */
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public SimpleValue gravityFactor = new SimpleValue(0);
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/** The factor of wind to apply */
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public SimpleValue windFactor = new SimpleValue(0);
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/** The length of the effect */
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public Range length = new Range(1000, 1000);
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/**
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* The color range
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*
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* @see ColorRecord
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*/
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public ArrayList colors = new ArrayList();
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/** The starting alpha value */
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public SimpleValue startAlpha = new SimpleValue(255);
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/** The ending alpha value */
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public SimpleValue endAlpha = new SimpleValue(0);
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/** Whiskas - Interpolated value for alpha */
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public LinearInterpolator alpha;
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/** Whiskas - Interpolated value for size */
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public LinearInterpolator size;
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/** Whiskas - Interpolated value for velocity */
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public LinearInterpolator velocity;
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/** Whiskas - Interpolated value for y axis scaling */
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public LinearInterpolator scaleY;
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/** The number of particles that will be emitted */
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public Range emitCount = new Range(1000, 1000);
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/** The points indicate */
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public int usePoints = Particle.INHERIT_POINTS;
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/** True if the quads should be orieted based on velocity */
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public boolean useOriented = false;
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/**
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* True if the additivie blending mode should be used for particles owned by
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* this emitter
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*/
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public boolean useAdditive = false;
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/** The name attribute */
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public String name;
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/** The name of the image in use */
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public String imageName = "";
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/** The image being used for the particles */
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private Image image;
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/** True if the image needs updating */
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private boolean updateImage;
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/** True if the emitter is enabled */
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private boolean enabled = true;
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/** The x coordinate of the position of this emitter */
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private float x;
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/** The y coordinate of the position of this emitter */
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private float y;
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/** The time in milliseconds til the next spawn */
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private int nextSpawn = 0;
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/** The timeout counting down to spawn */
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private int timeout;
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/** The number of particles in use by this emitter */
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private int particleCount;
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/** The system this emitter is being updated to */
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private ParticleSystem engine;
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/** The number of particles that are left ot emit */
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private int leftToEmit;
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/** True if we're wrapping up */
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protected boolean wrapUp = false;
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/** True if the system has completed due to a wrap up */
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protected boolean completed = false;
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/** True if we need to adjust particles for movement */
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protected boolean adjust;
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/** The amount to adjust on the x axis */
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protected float adjustx;
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/** The amount to adjust on the y axis */
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protected float adjusty;
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/**
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* Create a new emitter configurable externally
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*
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* @param name
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* The name of emitter
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*/
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public ConfigurableEmitter(String name) {
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this.name = name;
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leftToEmit = (int) emitCount.random();
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timeout = (int) (length.random());
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colors.add(new ColorRecord(0, Color.white));
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colors.add(new ColorRecord(1, Color.red));
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ArrayList curve = new ArrayList();
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curve.add(new Vector2f(0.0f, 0.0f));
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curve.add(new Vector2f(1.0f, 255.0f));
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alpha = new LinearInterpolator(curve, 0, 255);
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curve = new ArrayList();
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curve.add(new Vector2f(0.0f, 0.0f));
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curve.add(new Vector2f(1.0f, 255.0f));
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size = new LinearInterpolator(curve, 0, 255);
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curve = new ArrayList();
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curve.add(new Vector2f(0.0f, 0.0f));
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curve.add(new Vector2f(1.0f, 1.0f));
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velocity = new LinearInterpolator(curve, 0, 1);
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curve = new ArrayList();
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curve.add(new Vector2f(0.0f, 0.0f));
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curve.add(new Vector2f(1.0f, 1.0f));
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scaleY = new LinearInterpolator(curve, 0, 1);
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}
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/**
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* Set the name of the image to use on a per particle basis. The complete
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* reference to the image is required (based on the relative path)
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*
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* @see #setRelativePath(String)
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*
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* @param imageName
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* The name of the image to use on a per particle reference
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*/
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public void setImageName(String imageName) {
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if (imageName.length() == 0) {
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imageName = null;
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}
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this.imageName = imageName;
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if (imageName == null) {
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image = null;
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} else {
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updateImage = true;
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}
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}
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/**
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* The name of the image to load
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*
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* @return The name of the image to load
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*/
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public String getImageName() {
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return imageName;
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}
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/**
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* @see java.lang.Object#toString()
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*/
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public String toString() {
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return "[" + name + "]";
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}
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/**
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* Set the position of this particle source
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*
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* @param x
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* The x coodinate of that this emitter should spawn at
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* @param y
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* The y coodinate of that this emitter should spawn at
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*/
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public void setPosition(float x, float y) {
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setPosition(x,y,true);
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}
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/**
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* Set the position of this particle source
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*
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* @param x
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* The x coodinate of that this emitter should spawn at
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* @param y
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* The y coodinate of that this emitter should spawn at
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* @param moveParticles
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* True if particles should be moved with the emitter
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*/
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public void setPosition(float x, float y, boolean moveParticles) {
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if (moveParticles) {
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adjust = true;
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adjustx -= this.x - x;
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adjusty -= this.y - y;
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}
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this.x = x;
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this.y = y;
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}
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/**
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* Get the base x coordiante for spawning particles
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*
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* @return The x coordinate for spawning particles
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*/
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public float getX() {
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return x;
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}
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/**
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* Get the base y coordiante for spawning particles
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*
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* @return The y coordinate for spawning particles
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*/
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public float getY() {
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return y;
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}
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/**
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* @see org.newdawn.slick.particles.ParticleEmitter#isEnabled()
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*/
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public boolean isEnabled() {
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return enabled;
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}
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/**
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* @see org.newdawn.slick.particles.ParticleEmitter#setEnabled(boolean)
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*/
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public void setEnabled(boolean enabled) {
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this.enabled = enabled;
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}
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/**
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* @see org.newdawn.slick.particles.ParticleEmitter#update(org.newdawn.slick.particles.ParticleSystem,
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* int)
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*/
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public void update(ParticleSystem system, int delta) {
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this.engine = system;
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if (!adjust) {
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adjustx = 0;
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adjusty = 0;
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} else {
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adjust = false;
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}
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if (updateImage) {
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updateImage = false;
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try {
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image = new Image(relativePath + imageName);
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} catch (SlickException e) {
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image = null;
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Log.error(e);
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}
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}
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if ((wrapUp) ||
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((length.isEnabled()) && (timeout < 0)) ||
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((emitCount.isEnabled() && (leftToEmit <= 0)))) {
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if (particleCount == 0) {
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completed = true;
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}
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}
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particleCount = 0;
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if (wrapUp) {
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return;
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}
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if (length.isEnabled()) {
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if (timeout < 0) {
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return;
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}
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timeout -= delta;
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}
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if (emitCount.isEnabled()) {
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if (leftToEmit <= 0) {
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return;
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}
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}
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nextSpawn -= delta;
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if (nextSpawn < 0) {
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nextSpawn = (int) spawnInterval.random();
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int count = (int) spawnCount.random();
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for (int i = 0; i < count; i++) {
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Particle p = system.getNewParticle(this, initialLife.random());
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p.setSize(initialSize.random());
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p.setPosition(x + xOffset.random(), y + yOffset.random());
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p.setVelocity(0, 0, 0);
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float dist = initialDistance.random();
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float power = speed.random();
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if ((dist != 0) || (power != 0)) {
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float s = spread.getValue(0);
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float ang = (s + angularOffset.getValue(0) - (spread
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.getValue() / 2)) - 90;
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float xa = (float) FastTrig.cos(Math.toRadians(ang)) * dist;
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float ya = (float) FastTrig.sin(Math.toRadians(ang)) * dist;
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p.adjustPosition(xa, ya);
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float xv = (float) FastTrig.cos(Math.toRadians(ang));
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float yv = (float) FastTrig.sin(Math.toRadians(ang));
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p.setVelocity(xv, yv, power * 0.001f);
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}
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if (image != null) {
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p.setImage(image);
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}
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ColorRecord start = (ColorRecord) colors.get(0);
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p.setColor(start.col.r, start.col.g, start.col.b, startAlpha
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.getValue(0) / 255.0f);
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p.setUsePoint(usePoints);
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p.setOriented(useOriented);
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if (emitCount.isEnabled()) {
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leftToEmit--;
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if (leftToEmit <= 0) {
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break;
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}
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}
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}
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}
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}
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/**
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* @see org.newdawn.slick.particles.ParticleEmitter#updateParticle(org.newdawn.slick.particles.Particle,
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* int)
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*/
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public void updateParticle(Particle particle, int delta) {
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particleCount++;
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// adjust the particles if required
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particle.x += adjustx;
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particle.y += adjusty;
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particle.adjustVelocity(windFactor.getValue(0) * 0.00005f * delta, gravityFactor
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.getValue(0) * 0.00005f * delta);
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float offset = particle.getLife() / particle.getOriginalLife();
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float inv = 1 - offset;
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float colOffset = 0;
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float colInv = 1;
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Color startColor = null;
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Color endColor = null;
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for (int i = 0; i < colors.size() - 1; i++) {
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ColorRecord rec1 = (ColorRecord) colors.get(i);
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ColorRecord rec2 = (ColorRecord) colors.get(i + 1);
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if ((inv >= rec1.pos) && (inv <= rec2.pos)) {
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startColor = rec1.col;
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endColor = rec2.col;
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float step = rec2.pos - rec1.pos;
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colOffset = inv - rec1.pos;
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colOffset /= step;
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colOffset = 1 - colOffset;
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colInv = 1 - colOffset;
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}
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}
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if (startColor != null) {
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float r = (startColor.r * colOffset) + (endColor.r * colInv);
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float g = (startColor.g * colOffset) + (endColor.g * colInv);
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float b = (startColor.b * colOffset) + (endColor.b * colInv);
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float a;
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if (alpha.isActive()) {
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a = alpha.getValue(inv) / 255.0f;
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} else {
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a = ((startAlpha.getValue(0) / 255.0f) * offset)
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+ ((endAlpha.getValue(0) / 255.0f) * inv);
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}
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particle.setColor(r, g, b, a);
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}
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if (size.isActive()) {
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float s = size.getValue(inv);
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particle.setSize(s);
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} else {
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particle.adjustSize(delta * growthFactor.getValue(0) * 0.001f);
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}
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if (velocity.isActive()) {
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particle.setSpeed(velocity.getValue(inv));
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}
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if (scaleY.isActive()) {
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particle.setScaleY(scaleY.getValue(inv));
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}
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}
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/**
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* Check if this emitter has completed it's cycle
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*
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* @return True if the emitter has completed it's cycle
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*/
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public boolean completed() {
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if (engine == null) {
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return false;
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}
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if (length.isEnabled()) {
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if (timeout > 0) {
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return false;
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}
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return completed;
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}
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if (emitCount.isEnabled()) {
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if (leftToEmit > 0) {
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return false;
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}
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return completed;
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}
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if (wrapUp) {
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return completed;
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}
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return false;
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}
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/**
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* Cause the emitter to replay it's circle
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*/
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public void replay() {
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reset();
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nextSpawn = 0;
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leftToEmit = (int) emitCount.random();
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timeout = (int) (length.random());
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}
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/**
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* Release all the particles held by this emitter
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*/
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public void reset() {
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completed = false;
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if (engine != null) {
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engine.releaseAll(this);
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}
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}
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/**
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* Check if the replay has died out - used by the editor
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*/
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public void replayCheck() {
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if (completed()) {
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if (engine != null) {
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if (engine.getParticleCount() == 0) {
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replay();
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}
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}
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}
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}
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/**
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* Create a duplicate of this emitter.
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* The duplicate should be added to a ParticleSystem to be used.
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* @return a copy if no IOException occurred, null otherwise
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*/
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public ConfigurableEmitter duplicate() {
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ConfigurableEmitter theCopy = null;
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try {
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ByteArrayOutputStream bout = new ByteArrayOutputStream();
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ParticleIO.saveEmitter(bout, this);
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ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
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theCopy = ParticleIO.loadEmitter(bin);
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} catch (IOException e) {
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Log.error("Slick: ConfigurableEmitter.duplicate(): caught exception " + e.toString());
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return null;
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}
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return theCopy;
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}
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/**
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* a general interface to provide a general value :]
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*
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* @author void
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*/
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public interface Value {
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/**
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* get the current value that might depend from the given time
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*
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* @param time
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* @return the current value
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*/
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public float getValue(float time);
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}
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/**
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* A configurable simple single value
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*
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* @author void
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*/
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public class SimpleValue implements Value {
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/** The value configured */
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private float value;
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/** The next value */
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private float next;
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/**
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* Create a new configurable new value
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*
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* @param value
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* The initial value
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*/
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private SimpleValue(float value) {
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this.value = value;
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}
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/**
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* Get the currently configured value
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*
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* @return The currently configured value
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*/
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public float getValue(float time) {
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return value;
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}
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/**
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* Set the configured value
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*
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* @param value
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* The configured value
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*/
|
|
public void setValue(float value) {
|
|
this.value = value;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A configurable simple linear random value
|
|
*
|
|
* @author void
|
|
*/
|
|
public class RandomValue implements Value {
|
|
/** The value configured */
|
|
private float value;
|
|
|
|
/**
|
|
* Create a new configurable new value
|
|
*
|
|
* @param value
|
|
* The initial value
|
|
*/
|
|
private RandomValue(float value) {
|
|
this.value = value;
|
|
}
|
|
|
|
/**
|
|
* Get the currently configured value
|
|
*
|
|
* @return The currently configured value
|
|
*/
|
|
public float getValue(float time) {
|
|
return (float) (Math.random() * value);
|
|
}
|
|
|
|
/**
|
|
* Set the configured value
|
|
*
|
|
* @param value
|
|
* The configured value
|
|
*/
|
|
public void setValue(float value) {
|
|
this.value = value;
|
|
}
|
|
|
|
/**
|
|
* get the configured value
|
|
*
|
|
* @return the configured value
|
|
*/
|
|
public float getValue() {
|
|
return value;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A value computed based on linear interpolation between a set of points
|
|
*
|
|
* @author void
|
|
*/
|
|
public class LinearInterpolator implements Value {
|
|
/** The list of points to interpolate between */
|
|
private ArrayList curve;
|
|
/** True if this interpolation value is active */
|
|
private boolean active;
|
|
/** The minimum value in the data set */
|
|
private int min;
|
|
/** The maximum value in the data set */
|
|
private int max;
|
|
|
|
/**
|
|
* Create a new interpolated value
|
|
*
|
|
* @param curve The set of points to interpolate between
|
|
* @param min The minimum value in the dataset
|
|
* @param max The maximum value possible in the dataset
|
|
*/
|
|
public LinearInterpolator(ArrayList curve, int min, int max) {
|
|
this.curve = curve;
|
|
this.min = min;
|
|
this.max = max;
|
|
this.active = false;
|
|
}
|
|
|
|
/**
|
|
* Set the collection of data points to interpolate between
|
|
*
|
|
* @param curve The list of data points to interpolate between
|
|
*/
|
|
public void setCurve(ArrayList curve) {
|
|
this.curve = curve;
|
|
}
|
|
|
|
/**
|
|
* The list of data points to interpolate between
|
|
*
|
|
* @return A list of Vector2f of the data points to interpolate between
|
|
*/
|
|
public ArrayList getCurve() {
|
|
return curve;
|
|
}
|
|
|
|
/**
|
|
* Get the value to use at a given time value
|
|
*
|
|
* @param t The time value (expecting t in [0,1])
|
|
* @return The value to use at the specified time
|
|
*/
|
|
public float getValue(float t) {
|
|
// first: determine the segment we are in
|
|
Vector2f p0 = (Vector2f) curve.get(0);
|
|
for (int i = 1; i < curve.size(); i++) {
|
|
Vector2f p1 = (Vector2f) curve.get(i);
|
|
|
|
if (t >= p0.getX() && t <= p1.getX()) {
|
|
// found the segment
|
|
float st = (t - p0.getX())
|
|
/ (p1.getX() - p0.getX());
|
|
float r = p0.getY() + st
|
|
* (p1.getY() - p0.getY());
|
|
// System.out.println( "t: " + t + ", " + p0.x + ", " + p0.y
|
|
// + " : " + p1.x + ", " + p1.y + " => " + r );
|
|
|
|
return r;
|
|
}
|
|
|
|
p0 = p1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Check if this interpolated value should be used
|
|
*
|
|
* @return True if this value is in use
|
|
*/
|
|
public boolean isActive() {
|
|
return active;
|
|
}
|
|
|
|
/**
|
|
* Indicate if this interpoalte value should be used
|
|
*
|
|
* @param active True if this value should be used
|
|
*/
|
|
public void setActive(boolean active) {
|
|
this.active = active;
|
|
}
|
|
|
|
/**
|
|
* Get the maxmimum value possible in this data set
|
|
*
|
|
* @return The maximum value possible in this data set
|
|
*/
|
|
public int getMax() {
|
|
return max;
|
|
}
|
|
|
|
/**
|
|
* Set the maximum value possible in this data set
|
|
*
|
|
* @param max The maximum value possible in this data set
|
|
*/
|
|
public void setMax(int max) {
|
|
this.max = max;
|
|
}
|
|
|
|
/**
|
|
* Get the minimum value possible in this data set
|
|
*
|
|
* @return The minimum value possible in this data set
|
|
*/
|
|
public int getMin() {
|
|
return min;
|
|
}
|
|
|
|
/**
|
|
* Set the minimum value possible in this data set
|
|
*
|
|
* @param min The minimum value possible in this data set
|
|
*/
|
|
public void setMin(int min) {
|
|
this.min = min;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A single element in the colour range of this emitter
|
|
*
|
|
* @author kevin
|
|
*/
|
|
public class ColorRecord {
|
|
/** The position in the life cycle */
|
|
public float pos;
|
|
/** The color at this position */
|
|
public Color col;
|
|
|
|
/**
|
|
* Create a new record
|
|
*
|
|
* @param pos
|
|
* The position in the life cycle (0 = start, 1 = end)
|
|
* @param col
|
|
* The color applied at this position
|
|
*/
|
|
public ColorRecord(float pos, Color col) {
|
|
this.pos = pos;
|
|
this.col = col;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add a point in the colour cycle
|
|
*
|
|
* @param pos
|
|
* The position in the life cycle (0 = start, 1 = end)
|
|
* @param col
|
|
* The color applied at this position
|
|
*/
|
|
public void addColorPoint(float pos, Color col) {
|
|
colors.add(new ColorRecord(pos, col));
|
|
}
|
|
|
|
/**
|
|
* A simple bean describing a range of values
|
|
*
|
|
* @author kevin
|
|
*/
|
|
public class Range {
|
|
/** The maximum value in the range */
|
|
private float max;
|
|
/** The minimum value in the range */
|
|
private float min;
|
|
/** True if this range application is enabled */
|
|
private boolean enabled = false;
|
|
|
|
/**
|
|
* Create a new configurable range
|
|
*
|
|
* @param min
|
|
* The minimum value of the range
|
|
* @param max
|
|
* The maximum value of the range
|
|
*/
|
|
private Range(float min, float max) {
|
|
this.min = min;
|
|
this.max = max;
|
|
}
|
|
|
|
/**
|
|
* Generate a random number in the range
|
|
*
|
|
* @return The random number from the range
|
|
*/
|
|
public float random() {
|
|
return (float) (min + (Math.random() * (max - min)));
|
|
}
|
|
|
|
/**
|
|
* Check if this configuration option is enabled
|
|
*
|
|
* @return True if the range is enabled
|
|
*/
|
|
public boolean isEnabled() {
|
|
return enabled;
|
|
}
|
|
|
|
/**
|
|
* Indicate if this option should be enabled
|
|
*
|
|
* @param enabled
|
|
* True if this option should be enabled
|
|
*/
|
|
public void setEnabled(boolean enabled) {
|
|
this.enabled = enabled;
|
|
}
|
|
|
|
/**
|
|
* Get the maximum value for this range
|
|
*
|
|
* @return The maximum value for this range
|
|
*/
|
|
public float getMax() {
|
|
return max;
|
|
}
|
|
|
|
/**
|
|
* Set the maxmium value for this range
|
|
*
|
|
* @param max
|
|
* The maximum value for this range
|
|
*/
|
|
public void setMax(float max) {
|
|
this.max = max;
|
|
}
|
|
|
|
/**
|
|
* Get the minimum value for this range
|
|
*
|
|
* @return The minimum value for this range
|
|
*/
|
|
public float getMin() {
|
|
return min;
|
|
}
|
|
|
|
/**
|
|
* Set the minimum value for this range
|
|
*
|
|
* @param min
|
|
* The minimum value for this range
|
|
*/
|
|
public void setMin(float min) {
|
|
this.min = min;
|
|
}
|
|
}
|
|
|
|
public boolean useAdditive() {
|
|
return useAdditive;
|
|
}
|
|
|
|
public boolean isOriented() {
|
|
return this.useOriented;
|
|
}
|
|
|
|
public boolean usePoints(ParticleSystem system) {
|
|
return (this.usePoints == Particle.INHERIT_POINTS) && (system.usePoints()) ||
|
|
(this.usePoints == Particle.USE_POINTS);
|
|
}
|
|
|
|
public Image getImage() {
|
|
return image;
|
|
}
|
|
|
|
public void wrapUp() {
|
|
wrapUp = true;
|
|
}
|
|
|
|
public void resetState() {
|
|
wrapUp = false;
|
|
replay();
|
|
}
|
|
}
|