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18 lines
692 B
18 lines
692 B
import {rand} from "./util"
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export default class Spark {
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constructor(x, y, options) {
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this.x = x
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this.y = y
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this.age = 0
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this.acceleration = rand(options.acceleration[0], options.acceleration[1])
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this.color = options.randColor ? rand(0, 255) + "," + rand(0, 255) + "," + rand(0, 255) : OPT.color
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this.opacity = options.maxOpacity - this.age / (options.lifetime * rand(1, 10))
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}
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go(options) {
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this.x += options.speed * options.direction.x * this.acceleration / 2
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this.y += options.speed * options.direction.y * this.acceleration / 2
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this.opacity = options.maxOpacity - ++this.age / options.lifetime
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}
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}
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