@tsparticles/move-base/browser/BaseMover.js

tsParticles Base movement

import { getRangeMax, getRangeValue } from "@tsparticles/engine";
import { applyDistance, getProximitySpeedFactor, initSpin, move, spin } from "./Utils.js";
const diffFactor = 2, defaultSizeFactor = 1, defaultDeltaFactor = 1;
export class BaseMover {
    init(particle) {
        const options = particle.options, gravityOptions = options.move.gravity;
        particle.gravity = {
            enable: gravityOptions.enable,
            acceleration: getRangeValue(gravityOptions.acceleration),
            inverse: gravityOptions.inverse,
        };
        initSpin(particle);
    }
    isEnabled(particle) {
        return !particle.destroyed && particle.options.move.enable;
    }
    move(particle, delta) {
        const particleOptions = particle.options, moveOptions = particleOptions.move;
        if (!moveOptions.enable) {
            return;
        }
        const container = particle.container, pxRatio = container.retina.pixelRatio;
        particle.retina.moveSpeed ??= getRangeValue(moveOptions.speed) * pxRatio;
        particle.retina.moveDrift ??= getRangeValue(particle.options.move.drift) * pxRatio;
        const slowFactor = getProximitySpeedFactor(particle), reduceFactor = container.retina.reduceFactor, baseSpeed = particle.retina.moveSpeed, moveDrift = particle.retina.moveDrift, maxSize = getRangeMax(particleOptions.size.value) * pxRatio, sizeFactor = moveOptions.size ? particle.getRadius() / maxSize : defaultSizeFactor, deltaFactor = delta.factor || defaultDeltaFactor, moveSpeed = (baseSpeed * sizeFactor * slowFactor * deltaFactor) / diffFactor, maxSpeed = particle.retina.maxSpeed ?? container.retina.maxSpeed;
        if (moveOptions.spin.enable) {
            spin(particle, moveSpeed, reduceFactor);
        }
        else {
            move(particle, moveOptions, moveSpeed, maxSpeed, moveDrift, reduceFactor, delta);
        }
        applyDistance(particle);
    }
}