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feat: inspira #252
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feat: inspira #252
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,242 @@ | ||
| <script setup lang="ts"> | ||
| import { createNoise3D } from 'simplex-noise' | ||
| import { cn } from '@/lib/utils' | ||
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| const props = withDefaults(defineProps<VortexProps>(), { | ||
| particleCount: 700, | ||
| rangeY: 100, | ||
| baseSpeed: 0.0, | ||
| rangeSpeed: 1.5, | ||
| baseRadius: 1, | ||
| rangeRadius: 2, | ||
| baseHue: 220, | ||
| backgroundColor: 'transparent', | ||
| }) | ||
| // All constants | ||
| const TAU = 2 * Math.PI | ||
| const baseTTL = 50 | ||
| const rangeTTL = 150 | ||
| const particlePropCount = 9 | ||
| const rangeHue = 100 | ||
| const noiseSteps = 3 | ||
| const xOff = 0.00125 | ||
| const yOff = 0.00125 | ||
| const zOff = 0.0005 | ||
| let tick = 0 | ||
|
|
||
| interface VortexProps { | ||
| class?: string | ||
| containerClass?: string | ||
| particleCount?: number | ||
| rangeY?: number | ||
| baseHue?: number | ||
| baseSpeed?: number | ||
| rangeSpeed?: number | ||
| baseRadius?: number | ||
| rangeRadius?: number | ||
| backgroundColor?: string | ||
| } | ||
|
|
||
| const canvasRef = useTemplateRef<HTMLCanvasElement | null>('canvasRef') | ||
| const containerRef = useTemplateRef<HTMLElement | null>('containerRef') | ||
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| const particlePropsLength = props.particleCount * particlePropCount | ||
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| const noise3D = createNoise3D() | ||
| let particleProps = new Float32Array(particlePropsLength) | ||
| const center: [number, number] = [0, 0] | ||
|
|
||
| function rand(n: number): number { | ||
| return n * Math.random() | ||
| } | ||
|
|
||
| function randRange(n: number): number { | ||
| return n - rand(2 * n) | ||
| } | ||
|
|
||
| function fadeInOut(t: number, m: number): number { | ||
| const hm = 0.5 * m | ||
| return Math.abs(((t + hm) % m) - hm) / hm | ||
| } | ||
|
|
||
| function lerp(n1: number, n2: number, speed: number): number { | ||
| return (1 - speed) * n1 + speed * n2 | ||
| } | ||
|
|
||
| function setup() { | ||
| const canvas = canvasRef.value | ||
| const container = containerRef.value | ||
| if (canvas && container) { | ||
| const ctx = canvas.getContext('2d') | ||
| if (ctx) { | ||
| resize(canvas, ctx) | ||
| initParticles() | ||
| draw(canvas, ctx) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function initParticles() { | ||
| tick = 0 | ||
| particleProps = new Float32Array(particlePropsLength) | ||
| for (let i = 0; i < particlePropsLength; i += particlePropCount) { | ||
| initParticle(i) | ||
| } | ||
| } | ||
|
|
||
| function initParticle(i: number) { | ||
| const canvas = canvasRef.value | ||
| if (!canvas) | ||
| return | ||
|
|
||
| const x = rand(canvas.width) | ||
| const y = center[1] + randRange(props.rangeY) | ||
| const vx = 0 | ||
| const vy = 0 | ||
| const life = 0 | ||
| const ttl = baseTTL + rand(rangeTTL) | ||
| const speed = props.baseSpeed + rand(props.rangeSpeed) | ||
| const radius = props.baseRadius + rand(props.rangeRadius) | ||
| const hue = props.baseHue + rand(rangeHue) | ||
|
|
||
| particleProps.set([x, y, vx, vy, life, ttl, speed, radius, hue], i) | ||
| } | ||
|
|
||
| function draw(canvas: HTMLCanvasElement, ctx: CanvasRenderingContext2D) { | ||
| tick++ | ||
| ctx.clearRect(0, 0, canvas.width, canvas.height) | ||
|
|
||
| ctx.fillStyle = props.backgroundColor | ||
| ctx.fillRect(0, 0, canvas.width, canvas.height) | ||
|
|
||
| drawParticles(ctx) | ||
| renderGlow(canvas, ctx) | ||
| renderToScreen(canvas, ctx) | ||
|
|
||
| requestAnimationFrame(() => draw(canvas, ctx)) | ||
| } | ||
|
|
||
| function drawParticles(ctx: CanvasRenderingContext2D) { | ||
| for (let i = 0; i < particlePropsLength; i += particlePropCount) { | ||
| updateParticle(i, ctx) | ||
| } | ||
| } | ||
|
|
||
| function updateParticle(i: number, ctx: CanvasRenderingContext2D) { | ||
| const canvas = canvasRef.value | ||
| if (!canvas) | ||
| return | ||
|
|
||
| const [x, y, vx, vy, life, ttl, speed, radius, hue] = [ | ||
| particleProps[i], | ||
| particleProps[i + 1], | ||
| particleProps[i + 2], | ||
| particleProps[i + 3], | ||
| particleProps[i + 4], | ||
| particleProps[i + 5], | ||
| particleProps[i + 6], | ||
| particleProps[i + 7], | ||
| particleProps[i + 8], | ||
| ] | ||
|
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||
| const n = noise3D(x * xOff, y * yOff, tick * zOff) * noiseSteps * TAU | ||
| const nextVx = lerp(vx, Math.cos(n), 0.5) | ||
| const nextVy = lerp(vy, Math.sin(n), 0.5) | ||
|
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||
| drawParticle(x, y, x + nextVx * speed, y + nextVy * speed, life, ttl, radius, hue, ctx) | ||
|
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| particleProps[i] = x + nextVx * speed | ||
| particleProps[i + 1] = y + nextVy * speed | ||
| particleProps[i + 2] = nextVx | ||
| particleProps[i + 3] = nextVy | ||
| particleProps[i + 4] = life + 1 | ||
|
|
||
| if (checkBounds(x, y, canvas) || life > ttl) { | ||
| initParticle(i) | ||
| } | ||
| } | ||
|
|
||
| function drawParticle( | ||
| x: number, | ||
| y: number, | ||
| x2: number, | ||
| y2: number, | ||
| life: number, | ||
| ttl: number, | ||
| radius: number, | ||
| hue: number, | ||
| ctx: CanvasRenderingContext2D, | ||
| ) { | ||
| ctx.save() | ||
| ctx.lineCap = 'round' | ||
| ctx.lineWidth = radius | ||
| ctx.strokeStyle = `hsla(${hue},100%,60%,${fadeInOut(life, ttl)})` | ||
| ctx.beginPath() | ||
| ctx.moveTo(x, y) | ||
| ctx.lineTo(x2, y2) | ||
| ctx.stroke() | ||
| ctx.closePath() | ||
| ctx.restore() | ||
| } | ||
|
|
||
| function checkBounds(x: number, y: number, canvas: HTMLCanvasElement) { | ||
| return x > canvas.width || x < 0 || y > canvas.height || y < 0 | ||
| } | ||
|
|
||
| function resize(canvas: HTMLCanvasElement, ctx?: CanvasRenderingContext2D) { | ||
| const { innerWidth, innerHeight } = window | ||
| canvas.width = innerWidth | ||
| canvas.height = innerHeight | ||
| center[0] = 0.5 * canvas.width | ||
| center[1] = 0.5 * canvas.height | ||
| } | ||
|
|
||
| function renderGlow(canvas: HTMLCanvasElement, ctx: CanvasRenderingContext2D) { | ||
| ctx.save() | ||
| ctx.filter = 'blur(8px) brightness(200%)' | ||
| ctx.globalCompositeOperation = 'lighter' | ||
| ctx.drawImage(canvas, 0, 0) | ||
| ctx.restore() | ||
|
|
||
| ctx.save() | ||
| ctx.filter = 'blur(4px) brightness(200%)' | ||
| ctx.globalCompositeOperation = 'lighter' | ||
| ctx.drawImage(canvas, 0, 0) | ||
| ctx.restore() | ||
| } | ||
|
|
||
| function renderToScreen(canvas: HTMLCanvasElement, ctx: CanvasRenderingContext2D) { | ||
| ctx.save() | ||
| ctx.globalCompositeOperation = 'lighter' | ||
| ctx.drawImage(canvas, 0, 0) | ||
| ctx.restore() | ||
| } | ||
|
|
||
| onMounted(() => { | ||
| setup() | ||
| window.addEventListener('resize', () => { | ||
| const canvas = canvasRef.value | ||
| const ctx = canvas?.getContext('2d') | ||
| if (canvas && ctx) { | ||
| resize(canvas, ctx) | ||
| } | ||
| }) | ||
| }) | ||
|
|
||
| onUnmounted(() => { | ||
| window.removeEventListener('resize', () => { }) | ||
| }) | ||
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|
||
| </script> | ||
|
|
||
| <template> | ||
| <div :class="cn('relative h-full w-full', props.containerClass)"> | ||
| <div ref="containerRef" v-motion :initial="{ opacity: 0 }" :enter="{ opacity: 1 }" | ||
| class="absolute inset-0 z-0 flex size-full items-center justify-center bg-transparent"> | ||
| <canvas ref="canvasRef" /> | ||
| </div> | ||
|
|
||
| <div :class="cn('relative z-10', props.class)"> | ||
| <slot /> | ||
| </div> | ||
| </div> | ||
| </template> | ||
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Handle cleanup of animation frames on component unmounting.
The animation loop initiated by
requestAnimationFramein thedrawfunction continues indefinitely. Ensure that the animation loop is stopped when the component is unmounted to prevent memory leaks.Implement a mechanism to cancel the animation frame on unmount:
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@MrSunshyne
drawseems to be called recursively. Are you aware if it's ok to leave it as is or should there be some kind of conditional return to break out of the function?There was a problem hiding this comment.
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