private boolean selectRandomImage;
private boolean facingVelocity;
private float particlesPerSec = 20;
- private float emitCarry;
+ private float timeDifference = 0;
private float lowLife = 3f;
private float highLife = 7f;
private Vector3f gravity = new Vector3f(0.0f, 0.1f, 0.0f);
meshType = type;
-
-
// Must create clone of shape/influencer so that a reference to a static is
// not maintained
shape = shape.deepClone();
// assert !unusedIndices.contains(index);
// unusedIndices.add(index);
// }
- private boolean emitParticle(Vector3f min, Vector3f max) {
+ private Particle emitParticle(Vector3f min, Vector3f max) {
// int idx = newIndex();
// if (idx == -1)
// return false;
int idx = lastUsed + 1;
if (idx >= particles.length) {
- return false;
+ return null;
}
Particle p = particles[idx];
++lastUsed;
firstUnUsed = idx + 1;
- return true;
+ return p;
}
/**
max.set(Vector3f.NEGATIVE_INFINITY);
}
- while (emitParticle(min, max));
+ while (emitParticle(min, max) != null);
bbox.setMinMax(min, max);
this.setBoundRefresh();
particles[idx2] = p1;
}
+ private void updateParticle(Particle p, float tpf, Vector3f min, Vector3f max){
+ // applying gravity
+ p.velocity.x -= gravity.x * tpf;
+ p.velocity.y -= gravity.y * tpf;
+ p.velocity.z -= gravity.z * tpf;
+ temp.set(p.velocity).multLocal(tpf);
+ p.position.addLocal(temp);
+
+ // affecting color, size and angle
+ float b = (p.startlife - p.life) / p.startlife;
+ p.color.interpolate(startColor, endColor, b);
+ p.size = FastMath.interpolateLinear(b, startSize, endSize);
+ p.angle += p.rotateSpeed * tpf;
+
+ // Computing bounding volume
+ temp.set(p.position).addLocal(p.size, p.size, p.size);
+ max.maxLocal(temp);
+ temp.set(p.position).subtractLocal(p.size, p.size, p.size);
+ min.minLocal(temp);
+
+ if (!selectRandomImage) {
+ p.imageIndex = (int) (b * imagesX * imagesY);
+ }
+ }
+
private void updateParticleState(float tpf) {
// Force world transform to update
this.getWorldTransform();
TempVars vars = TempVars.get();
-
Vector3f min = vars.vect1.set(Vector3f.POSITIVE_INFINITY);
Vector3f max = vars.vect2.set(Vector3f.NEGATIVE_INFINITY);
continue;
}
- // position += velocity * tpf
- //p.distToCam = -1;
-
- // applying gravity
- p.velocity.x -= gravity.x * tpf;
- p.velocity.y -= gravity.y * tpf;
- p.velocity.z -= gravity.z * tpf;
- temp.set(p.velocity).multLocal(tpf);
- p.position.addLocal(temp);
-
- // affecting color, size and angle
- float b = (p.startlife - p.life) / p.startlife;
- p.color.interpolate(startColor, endColor, b);
- p.size = FastMath.interpolateLinear(b, startSize, endSize);
- p.angle += p.rotateSpeed * tpf;
-
- // Computing bounding volume
- temp.set(p.position).addLocal(p.size, p.size, p.size);
- max.maxLocal(temp);
- temp.set(p.position).subtractLocal(p.size, p.size, p.size);
- min.minLocal(temp);
-
- if (!selectRandomImage) {
- p.imageIndex = (int) (b * imagesX * imagesY);
- }
+ updateParticle(p, tpf, min, max);
if (firstUnUsed < i) {
this.swap(firstUnUsed, i);
firstUnUsed++;
}
}
-
- float particlesToEmitF = particlesPerSec * tpf;
- int particlesToEmit = (int) particlesToEmitF;
- emitCarry += particlesToEmitF - particlesToEmit;
-
- while (emitCarry > 1f) {
- ++particlesToEmit;
- emitCarry -= 1f;
- }
-
- for (int i = 0; i < particlesToEmit; ++i) {
- this.emitParticle(min, max);
+
+ // Spawns particles within the tpf timeslot with proper age
+ float interval = 1f / particlesPerSec;
+ tpf += timeDifference;
+ while (tpf > interval){
+ tpf -= interval;
+ Particle p = emitParticle(min, max);
+ if (p != null){
+ p.life -= tpf;
+ if (p.life <= 0){
+ freeParticle(lastUsed);
+ }else{
+ updateParticle(p, tpf, min, max);
+ }
+ }
}
+ timeDifference = tpf;
BoundingBox bbox = (BoundingBox) this.getMesh().getBound();
bbox.setMinMax(min, max);