public void emit() {
for (int i = 1; i <= emitNum; i++) {
Particle x = new Particle(loc.x, loc.y, 0, null);
if (images != null) {
x.setImage(images[(int) randomP(images.length)]);
} else {
x.setImage(null);
}
double temp = angle2 - angle1;
double newAngle = (((rnd.nextDouble() * temp) + angle1) * Math.PI / 180);
if (randomV) {
x.setVel(
randomP(xSpeed) * FastMath.cos(newAngle), randomP(ySpeed) * FastMath.sin(newAngle), 0);
} else {
x.setVel(xSpeed * FastMath.cos(newAngle), ySpeed * FastMath.sin(newAngle), 0);
}
x.setFade(fade);
x.setFadeRate(fadeRate);
x.setLoc(loc.x + random(spreadX), loc.y + random(spreadY), 0);
x.setAcc(xAcc, yAcc, 0);
x.setMaxAge(maxAge);
x.setMaxSize(maxSize);
x.setSize(size);
x.setAgeRate(ageRate);
x.setGrowthRate(growthRate);
x.setBlink(blink);
x.setColor(color);
x.setMaxSpeed(new Vector3D(maxXSpeed, maxYSpeed, 0));
particleManager.addParticle(x);
}
}
/**
* @see
* org.newdawn.slick.particles.ParticleEmitter#updateParticle(org.newdawn.slick.particles.Particle,
* int)
*/
@SuppressWarnings("null")
@Override
public void updateParticle(Particle particle, int delta) {
particleCount++;
// adjust the particles if required
particle.x += adjustx;
particle.y += adjusty;
particle.adjustVelocity(
windFactor.getValue(0) * 0.00005f * delta, gravityFactor.getValue(0) * 0.00005f * delta);
float offset = particle.getLife() / particle.getOriginalLife();
float inv = 1 - offset;
float colOffset = 0;
float colInv = 1;
Color startColor = null;
Color endColor = null;
for (int i = 0; i < colors.size() - 1; i++) {
ColorRecord rec1 = colors.get(i);
ColorRecord rec2 = colors.get(i + 1);
if ((inv >= rec1.pos) && (inv <= rec2.pos)) {
startColor = rec1.col;
endColor = rec2.col;
float step = rec2.pos - rec1.pos;
colOffset = inv - rec1.pos;
colOffset /= step;
colOffset = 1 - colOffset;
colInv = 1 - colOffset;
}
}
if (startColor != null) {
float r = (startColor.r * colOffset) + (endColor.r * colInv);
float g = (startColor.g * colOffset) + (endColor.g * colInv);
float b = (startColor.b * colOffset) + (endColor.b * colInv);
float a;
if (alpha.isActive()) a = alpha.getValue(inv) / 255.0f;
else
a = ((startAlpha.getValue(0) / 255.0f) * offset) + ((endAlpha.getValue(0) / 255.0f) * inv);
particle.setColor(r, g, b, a);
}
if (size.isActive()) {
float s = size.getValue(inv);
particle.setSize(s);
} else particle.adjustSize(delta * growthFactor.getValue(0) * 0.001f);
if (velocity.isActive()) particle.setSpeed(velocity.getValue(inv));
if (scaleY.isActive()) particle.setScaleY(scaleY.getValue(inv));
}
/**
* @see
* org.newdawn.slick.particles.ParticleEmitter#update(org.newdawn.slick.particles.ParticleSystem,
* int)
*/
@Override
public void update(ParticleSystem system, int delta) {
this.engine = system;
if (!adjust) {
adjustx = 0;
adjusty = 0;
} else adjust = false;
if (updateImage) {
updateImage = false;
try {
image = new Image(relativePath + imageName);
} catch (SlickException e) {
image = null;
Log.error(e);
}
}
if (((wrapUp)
|| ((length.isEnabled()) && (timeout < 0))
|| ((emitCount.isEnabled() && (leftToEmit <= 0))))
&& (particleCount == 0)) {
completed = true;
}
particleCount = 0;
if (wrapUp) return;
if (length.isEnabled()) {
if (timeout < 0) return;
timeout -= delta;
}
if (emitCount.isEnabled() && leftToEmit <= 0) return;
nextSpawn -= delta;
if (nextSpawn < 0) {
nextSpawn = (int) spawnInterval.random();
int count = (int) spawnCount.random();
for (int i = 0; i < count; i++) {
Particle p = system.getNewParticle(this, initialLife.random());
p.setSize(initialSize.random());
p.setPosition(x + xOffset.random(), y + yOffset.random());
p.setVelocity(0, 0, 0);
float dist = initialDistance.random();
float power = speed.random();
if ((dist != 0) || (power != 0)) {
float s = spread.getValue(0);
float ang = (s + angularOffset.getValue(0) - (spread.getValue() / 2)) - 90;
float xa = (float) FastTrig.cos(Math.toRadians(ang)) * dist;
float ya = (float) FastTrig.sin(Math.toRadians(ang)) * dist;
p.adjustPosition(xa, ya);
float xv = (float) FastTrig.cos(Math.toRadians(ang));
float yv = (float) FastTrig.sin(Math.toRadians(ang));
p.setVelocity(xv, yv, power * 0.001f);
}
if (image != null) p.setImage(image);
ColorRecord start = colors.get(0);
p.setColor(start.col.r, start.col.g, start.col.b, startAlpha.getValue(0) / 255.0f);
p.setUsePoint(usePoints);
p.setOriented(useOriented);
if (emitCount.isEnabled()) {
leftToEmit--;
if (leftToEmit <= 0) break;
}
}
}
}
