private void removeDeadParticles() {
for (Particle p : particles) {
if (p.killed()) {
particlesRemove.add(p);
}
}
for (Particle pr : particlesRemove) particles.remove(pr);
particlesRemove.clear();
}
@Override
public void createInner() {
List<Particle> particles = new LinkedList();
for (int i = 0; i < 2500; i++) {
particles.add(
new Particle(Window3D.pos.add(Vec3.randomSquare(MAX_DIST)), Math.random() * .04 + .06));
}
onUpdate(
dt -> {
Iterator<Particle> it = particles.iterator();
while (it.hasNext()) {
Particle p = it.next();
p.pos = p.pos.add(Vec3.randomSquare(dt / 5).add(new Vec3(0, 0, -dt)));
p.pos =
Window3D.pos.add(
p.pos
.subtract(Window3D.pos)
.perComponent(d -> (d + 3 * MAX_DIST) % (2 * MAX_DIST) - MAX_DIST));
}
});
Sprite s = new Sprite("snowflake2");
Core.renderLayer(.2)
.onEvent(
() -> {
glEnable(GL_TEXTURE_2D);
s.getTexture().bind();
WHITE.glColor();
glBegin(GL_QUADS);
particles.forEach(
p -> {
if (CubeMap.rayCastStream(p.pos, new Vec3(0, 0, 1))
.anyMatch(cd -> cd.c != null)) {
return;
}
;
Vec3 towards = p.pos.subtract(Window3D.pos);
Vec3 side = towards.cross(Window3D.UP).withLength(p.size / 2);
Vec3 snowUp = towards.cross(side).withLength(p.size / 2);
Graphics3D.drawQuadFastT(
p.pos.add(side).add(snowUp),
p.pos.subtract(side).add(snowUp),
p.pos.subtract(side).subtract(snowUp),
p.pos.add(side).subtract(snowUp));
});
glEnd();
})
.addChild(this);
}
protected void particlesUpdate() {
for (Particle p : particles) {
p.update();
}
}