static {
Core.update.forEach(
dt -> {
Iterator<Particle> it = ALL.iterator();
while (it.hasNext()) {
Particle p = it.next();
p.vel = p.vel.add(p.gra.multiply(dt));
p.pos = p.pos.add(p.vel.multiply(dt));
p.lifeTime -= dt;
if (p.lifeTime < 0 || CubeMap.isSolid(p.pos)) {
it.remove();
}
}
});
Sprite s = new Sprite("ball");
Core.render.onEvent(
() -> {
ALL.forEach(
p -> {
s.scale = new Vec2(p.size);
s.color = p.color;
Vec3 towardsSprite = p.pos.subtract(Window3D.pos);
s.draw(
p.pos.subtract(towardsSprite.cross(Window3D.UP).withLength(-s.scale.x / 2)),
-towardsSprite.direction2() + Math.PI / 2,
towardsSprite.direction() + Math.PI / 2);
});
});
}
@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);
}