tsparticles
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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.
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JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.OpacityUpdater = void 0;
const Utils_1 = require("../../Utils");
function checkDestroy(particle, value, minValue, maxValue) {
switch (particle.options.opacity.animation.destroy) {
case "max":
if (value >= maxValue) {
particle.destroy();
}
break;
case "min":
if (value <= minValue) {
particle.destroy();
}
break;
}
}
function updateOpacity(particle, delta) {
var _a, _b, _c, _d, _e;
if (!particle.opacity) {
return;
}
const minValue = particle.opacity.min;
const maxValue = particle.opacity.max;
if (particle.destroyed ||
!particle.opacity.enable ||
(((_a = particle.opacity.maxLoops) !== null && _a !== void 0 ? _a : 0) > 0 && ((_b = particle.opacity.loops) !== null && _b !== void 0 ? _b : 0) > ((_c = particle.opacity.maxLoops) !== null && _c !== void 0 ? _c : 0))) {
return;
}
switch (particle.opacity.status) {
case 0:
if (particle.opacity.value >= maxValue) {
particle.opacity.status = 1;
if (!particle.opacity.loops) {
particle.opacity.loops = 0;
}
particle.opacity.loops++;
}
else {
particle.opacity.value += ((_d = particle.opacity.velocity) !== null && _d !== void 0 ? _d : 0) * delta.factor;
}
break;
case 1:
if (particle.opacity.value <= minValue) {
particle.opacity.status = 0;
if (!particle.opacity.loops) {
particle.opacity.loops = 0;
}
particle.opacity.loops++;
}
else {
particle.opacity.value -= ((_e = particle.opacity.velocity) !== null && _e !== void 0 ? _e : 0) * delta.factor;
}
break;
}
checkDestroy(particle, particle.opacity.value, minValue, maxValue);
if (!particle.destroyed) {
particle.opacity.value = (0, Utils_1.clamp)(particle.opacity.value, minValue, maxValue);
}
}
class OpacityUpdater {
constructor(container) {
this.container = container;
}
init(particle) {
const opacityOptions = particle.options.opacity;
particle.opacity = {
enable: opacityOptions.animation.enable,
max: (0, Utils_1.getRangeMax)(opacityOptions.value),
min: (0, Utils_1.getRangeMin)(opacityOptions.value),
value: (0, Utils_1.getRangeValue)(opacityOptions.value),
loops: 0,
maxLoops: (0, Utils_1.getRangeValue)(opacityOptions.animation.count),
};
const opacityAnimation = opacityOptions.animation;
if (opacityAnimation.enable) {
particle.opacity.status = 0;
const opacityRange = opacityOptions.value;
particle.opacity.min = (0, Utils_1.getRangeMin)(opacityRange);
particle.opacity.max = (0, Utils_1.getRangeMax)(opacityRange);
switch (opacityAnimation.startValue) {
case "min":
particle.opacity.value = particle.opacity.min;
particle.opacity.status = 0;
break;
case "random":
particle.opacity.value = (0, Utils_1.randomInRange)(particle.opacity);
particle.opacity.status =
Math.random() >= 0.5 ? 0 : 1;
break;
case "max":
default:
particle.opacity.value = particle.opacity.max;
particle.opacity.status = 1;
break;
}
particle.opacity.velocity =
((0, Utils_1.getRangeValue)(opacityAnimation.speed) / 100) * this.container.retina.reduceFactor;
if (!opacityAnimation.sync) {
particle.opacity.velocity *= Math.random();
}
}
}
isEnabled(particle) {
var _a, _b, _c, _d;
return (!particle.destroyed &&
!particle.spawning &&
!!particle.opacity &&
particle.opacity.enable &&
(((_a = particle.opacity.maxLoops) !== null && _a !== void 0 ? _a : 0) <= 0 ||
(((_b = particle.opacity.maxLoops) !== null && _b !== void 0 ? _b : 0) > 0 &&
((_c = particle.opacity.loops) !== null && _c !== void 0 ? _c : 0) < ((_d = particle.opacity.maxLoops) !== null && _d !== void 0 ? _d : 0))));
}
update(particle, delta) {
if (!this.isEnabled(particle)) {
return;
}
updateOpacity(particle, delta);
}
}
exports.OpacityUpdater = OpacityUpdater;