particleEmitterSystem = (env, ents) => {
for (const ent of ents) {
if (ent.particleEmitter && ent.position) {
const { _particles, emit, perFrame, forces, dieAfter } =
ent.particleEmitter;
let i = dieAfter < perFrame ? dieAfter : perFrame;
ent.particleEmitter.dieAfter -= i;
while (i--) {
const p = emit(ent);
if (p) _particles.push(p);
}
i = _particles.length;
while (i--) {
_particles[i].update(forces);
if (_particles[i].isDead) _particles.splice(i, 1);
}
if (ent.particleEmitter.dieAfter <= 0 && _particles.length === 0) {
env.killEntity(ent);
}
}
}
}
import {
vec2,
PI,
TWO_PI,
HALF_PI,
random,
justCanvas,
sim,
entity,
basicMover,
position,
rotation,
graphics,
drawArrow,
rect,
circle,
polygon,
drawPolygon,
movement,
velocity,
renderer,
rotateWithDirection,
angularVelocity,
clampAngularVelocity,
angularAcceleration,
angularMovement,
globalForces,
noiseAcc,
noiseAcceleration,
overflowWrap,
overflowKill,
killOnStageExit,
followMouseAcceleration,
accToMouse,
force,
onClick,
onEntityClick,
KeyboardCapturer,
attachTo,
moveAttached,
pointInEntity,
debug,
stateDump,
ImgSprite
} from "@ajur/the-nature-of-code-tools"
import {
spaceshipKeyboardSteeringSys,
spaceshipKeyboardSteering
} from "@ajur/the-nature-of-code-3-oscillation"
particlesTexture = FileAttachment("particles.png").image()
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
