tsparticles/dist/browser/Interactions/Particles/Collider.js

Easily create highly customizable particle 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.

import { CollisionMode } from "../../Enums";
import { NumberUtils, Utils } from "../../Utils";
function bounce(p1, p2) {
    Utils.circleBounce(Utils.circleBounceDataFromParticle(p1), Utils.circleBounceDataFromParticle(p2));
}
function destroy(p1, p2) {
    if (p1.getRadius() === undefined && p2.getRadius() !== undefined) {
        p1.destroy();
    }
    else if (p1.getRadius() !== undefined && p2.getRadius() === undefined) {
        p2.destroy();
    }
    else if (p1.getRadius() !== undefined && p2.getRadius() !== undefined) {
        if (p1.getRadius() >= p2.getRadius()) {
            p2.destroy();
        }
        else {
            p1.destroy();
        }
    }
}
export class Collider {
    constructor(container) {
        this.container = container;
    }
    isEnabled(particle) {
        return particle.options.collisions.enable;
    }
    reset() {
    }
    interact(p1) {
        const container = this.container;
        const pos1 = p1.getPosition();
        const query = container.particles.quadTree.queryCircle(pos1, p1.getRadius() * 2);
        for (const p2 of query) {
            if (p1 === p2 ||
                !p2.options.collisions.enable ||
                p1.options.collisions.mode !== p2.options.collisions.mode ||
                p2.destroyed ||
                p2.spawning) {
                continue;
            }
            const pos2 = p2.getPosition();
            const dist = NumberUtils.getDistance(pos1, pos2);
            const radius1 = p1.getRadius();
            const radius2 = p2.getRadius();
            const distP = radius1 + radius2;
            if (dist <= distP) {
                this.resolveCollision(p1, p2);
            }
        }
    }
    resolveCollision(p1, p2) {
        switch (p1.options.collisions.mode) {
            case CollisionMode.absorb: {
                this.absorb(p1, p2);
                break;
            }
            case CollisionMode.bounce: {
                bounce(p1, p2);
                break;
            }
            case CollisionMode.destroy: {
                destroy(p1, p2);
                break;
            }
        }
    }
    absorb(p1, p2) {
        const container = this.container;
        const fps = container.actualOptions.fpsLimit / 1000;
        if (p1.getRadius() === undefined && p2.getRadius() !== undefined) {
            p1.destroy();
        }
        else if (p1.getRadius() !== undefined && p2.getRadius() === undefined) {
            p2.destroy();
        }
        else if (p1.getRadius() !== undefined && p2.getRadius() !== undefined) {
            if (p1.getRadius() >= p2.getRadius()) {
                const factor = NumberUtils.clamp(p1.getRadius() / p2.getRadius(), 0, p2.getRadius()) * fps;
                p1.size.value += factor;
                p2.size.value -= factor;
                if (p2.getRadius() <= container.retina.pixelRatio) {
                    p2.size.value = 0;
                    p2.destroy();
                }
            }
            else {
                const factor = NumberUtils.clamp(p2.getRadius() / p1.getRadius(), 0, p1.getRadius()) * fps;
                p1.size.value -= factor;
                p2.size.value += factor;
                if (p1.getRadius() <= container.retina.pixelRatio) {
                    p1.size.value = 0;
                    p1.destroy();
                }
            }
        }
    }
}