tsparticles
Version:
Easily create highly customizable particle, confetti and fireworks animations and use them as animated backgrounds for your website. Ready to use components available also for React, Vue.js (2.x and 3.x), Angular, Svelte, jQuery, Preact, Riot.js, Inferno.
159 lines (158 loc) • 7.35 kB
JavaScript
import { colorToRgb, getDistance, getDistances, getRangeValue, getStyleFromRgb, isPointInside } from "../../Utils";
import { Absorber } from "./Options/Classes/Absorber";
import { Vector } from "../../Core";
export class AbsorberInstance {
constructor(absorbers, container, options, position) {
var _a, _b, _c;
this.absorbers = absorbers;
this.container = container;
this.initialPosition = position ? Vector.create(position.x, position.y) : undefined;
if (options instanceof Absorber) {
this.options = options;
}
else {
this.options = new Absorber();
this.options.load(options);
}
this.dragging = false;
this.name = this.options.name;
this.opacity = this.options.opacity;
this.size = getRangeValue(this.options.size.value) * container.retina.pixelRatio;
this.mass = this.size * this.options.size.density * container.retina.reduceFactor;
const limit = this.options.size.limit;
this.limit = {
radius: limit.radius * container.retina.pixelRatio * container.retina.reduceFactor,
mass: limit.mass,
};
this.color = (_a = colorToRgb(this.options.color)) !== null && _a !== void 0 ? _a : {
b: 0,
g: 0,
r: 0,
};
this.position = (_c = (_b = this.initialPosition) === null || _b === void 0 ? void 0 : _b.copy()) !== null && _c !== void 0 ? _c : this.calcPosition();
}
attract(particle) {
const container = this.container;
const options = this.options;
if (options.draggable) {
const mouse = container.interactivity.mouse;
if (mouse.clicking && mouse.downPosition) {
const mouseDist = getDistance(this.position, mouse.downPosition);
if (mouseDist <= this.size) {
this.dragging = true;
}
}
else {
this.dragging = false;
}
if (this.dragging && mouse.position) {
this.position.x = mouse.position.x;
this.position.y = mouse.position.y;
}
}
const pos = particle.getPosition();
const { dx, dy, distance } = getDistances(this.position, pos);
const v = Vector.create(dx, dy);
v.length = (this.mass / Math.pow(distance, 2)) * container.retina.reduceFactor;
if (distance < this.size + particle.getRadius()) {
const sizeFactor = particle.getRadius() * 0.033 * container.retina.pixelRatio;
if ((this.size > particle.getRadius() && distance < this.size - particle.getRadius()) ||
(particle.absorberOrbit !== undefined && particle.absorberOrbit.length < 0)) {
if (options.destroy) {
particle.destroy();
}
else {
particle.needsNewPosition = true;
this.updateParticlePosition(particle, v);
}
}
else {
if (options.destroy) {
particle.size.value -= sizeFactor;
}
this.updateParticlePosition(particle, v);
}
if (this.limit.radius <= 0 || this.size < this.limit.radius) {
this.size += sizeFactor;
}
if (this.limit.mass <= 0 || this.mass < this.limit.mass) {
this.mass += sizeFactor * this.options.size.density * container.retina.reduceFactor;
}
}
else {
this.updateParticlePosition(particle, v);
}
}
resize() {
const initialPosition = this.initialPosition;
this.position =
initialPosition && isPointInside(initialPosition, this.container.canvas.size)
? initialPosition
: this.calcPosition();
}
draw(context) {
context.translate(this.position.x, this.position.y);
context.beginPath();
context.arc(0, 0, this.size, 0, Math.PI * 2, false);
context.closePath();
context.fillStyle = getStyleFromRgb(this.color, this.opacity);
context.fill();
}
calcPosition() {
var _a, _b;
const container = this.container;
const percentPosition = this.options.position;
return Vector.create((getRangeValue((_a = percentPosition === null || percentPosition === void 0 ? void 0 : percentPosition.x) !== null && _a !== void 0 ? _a : Math.random() * 100) / 100) * container.canvas.size.width, (getRangeValue((_b = percentPosition === null || percentPosition === void 0 ? void 0 : percentPosition.y) !== null && _b !== void 0 ? _b : Math.random() * 100) / 100) * container.canvas.size.height);
}
updateParticlePosition(particle, v) {
var _a;
if (particle.destroyed) {
return;
}
const container = this.container;
const canvasSize = container.canvas.size;
if (particle.needsNewPosition) {
particle.position.x = Math.floor(Math.random() * canvasSize.width);
particle.position.y = Math.floor(Math.random() * canvasSize.height);
particle.velocity.setTo(particle.initialVelocity);
particle.absorberOrbit = undefined;
particle.needsNewPosition = false;
}
if (this.options.orbits) {
if (particle.absorberOrbit === undefined) {
particle.absorberOrbit = Vector.create(0, 0);
particle.absorberOrbit.length = getDistance(particle.getPosition(), this.position);
particle.absorberOrbit.angle = Math.random() * Math.PI * 2;
}
if (particle.absorberOrbit.length <= this.size && !this.options.destroy) {
const minSize = Math.min(canvasSize.width, canvasSize.height);
particle.absorberOrbit.length = minSize * (1 + (Math.random() * 0.2 - 0.1));
}
if (particle.absorberOrbitDirection === undefined) {
particle.absorberOrbitDirection =
particle.velocity.x >= 0 ? "clockwise" : "counter-clockwise";
}
const orbitRadius = particle.absorberOrbit.length;
const orbitAngle = particle.absorberOrbit.angle;
const orbitDirection = particle.absorberOrbitDirection;
particle.velocity.x = 0;
particle.velocity.y = 0;
const updateFunc = {
x: orbitDirection === "clockwise" ? Math.cos : Math.sin,
y: orbitDirection === "clockwise" ? Math.sin : Math.cos,
};
particle.position.x = this.position.x + orbitRadius * updateFunc.x(orbitAngle);
particle.position.y = this.position.y + orbitRadius * updateFunc.y(orbitAngle);
particle.absorberOrbit.length -= v.length;
particle.absorberOrbit.angle +=
((((_a = particle.retina.moveSpeed) !== null && _a !== void 0 ? _a : 0) * container.retina.pixelRatio) / 100) *
container.retina.reduceFactor;
}
else {
const addV = Vector.origin;
addV.length = v.length;
addV.angle = v.angle;
particle.velocity.addTo(addV);
}
}
}