{"name":"Threads","title":"Threads","description":"Animated pattern of lines forming a fabric-like motion.","type":"registry:component","add":"when-added","files":[{"type":"registry:component","role":"file","content":"<template>\n  <div ref=\"containerRef\" class=\"w-full h-full relative\" />\n</template>\n\n<script setup lang=\"ts\">\nimport { onMounted, onUnmounted, watch, useTemplateRef } from 'vue';\nimport { Renderer, Program, Mesh, Triangle, Color } from 'ogl';\nimport type { OGLRenderingContext } from 'ogl';\n\ninterface Props {\n  color?: [number, number, number];\n  amplitude?: number;\n  distance?: number;\n  enableMouseInteraction?: boolean;\n}\n\nconst props = withDefaults(defineProps<Props>(), {\n  color: () => [1, 1, 1] as [number, number, number],\n  amplitude: 1,\n  distance: 0,\n  enableMouseInteraction: false\n});\n\nconst containerRef = useTemplateRef<HTMLDivElement>('containerRef');\n\nlet renderer: Renderer | null = null;\nlet gl: OGLRenderingContext | null = null;\nlet program: Program | null = null;\nlet mesh: Mesh | null = null;\nlet animationId: number | null = null;\nlet currentMouse = [0.5, 0.5];\nlet targetMouse = [0.5, 0.5];\n\nconst vertexShader = `\nattribute vec2 position;\nattribute vec2 uv;\nvarying vec2 vUv;\nvoid main() {\n  vUv = uv;\n  gl_Position = vec4(position, 0.0, 1.0);\n}\n`;\n\nconst fragmentShader = `\nprecision highp float;\n\nuniform float iTime;\nuniform vec3 iResolution;\nuniform vec3 uColor;\nuniform float uAmplitude;\nuniform float uDistance;\nuniform vec2 uMouse;\n\n#define PI 3.1415926538\n\nconst int u_line_count = 40;\nconst float u_line_width = 7.0;\nconst float u_line_blur = 10.0;\n\nfloat Perlin2D(vec2 P) {\n    vec2 Pi = floor(P);\n    vec4 Pf_Pfmin1 = P.xyxy - vec4(Pi, Pi + 1.0);\n    vec4 Pt = vec4(Pi.xy, Pi.xy + 1.0);\n    Pt = Pt - floor(Pt * (1.0 / 71.0)) * 71.0;\n    Pt += vec2(26.0, 161.0).xyxy;\n    Pt *= Pt;\n    Pt = Pt.xzxz * Pt.yyww;\n    vec4 hash_x = fract(Pt * (1.0 / 951.135664));\n    vec4 hash_y = fract(Pt * (1.0 / 642.949883));\n    vec4 grad_x = hash_x - 0.49999;\n    vec4 grad_y = hash_y - 0.49999;\n    vec4 grad_results = inversesqrt(grad_x * grad_x + grad_y * grad_y)\n        * (grad_x * Pf_Pfmin1.xzxz + grad_y * Pf_Pfmin1.yyww);\n    grad_results *= 1.4142135623730950;\n    vec2 blend = Pf_Pfmin1.xy * Pf_Pfmin1.xy * Pf_Pfmin1.xy\n               * (Pf_Pfmin1.xy * (Pf_Pfmin1.xy * 6.0 - 15.0) + 10.0);\n    vec4 blend2 = vec4(blend, vec2(1.0 - blend));\n    return dot(grad_results, blend2.zxzx * blend2.wwyy);\n}\n\nfloat pixel(float count, vec2 resolution) {\n    return (1.0 / max(resolution.x, resolution.y)) * count;\n}\n\nfloat lineFn(vec2 st, float width, float perc, float offset, vec2 mouse, float time, float amplitude, float distance) {\n    float split_offset = (perc * 0.4);\n    float split_point = 0.1 + split_offset;\n\n    float amplitude_normal = smoothstep(split_point, 0.7, st.x);\n    float amplitude_strength = 0.5;\n    float finalAmplitude = amplitude_normal * amplitude_strength\n                           * amplitude * (1.0 + (mouse.y - 0.5) * 0.2);\n\n    float time_scaled = time / 10.0 + (mouse.x - 0.5) * 1.0;\n    float blur = smoothstep(split_point, split_point + 0.05, st.x) * perc;\n\n    float xnoise = mix(\n        Perlin2D(vec2(time_scaled, st.x + perc) * 2.5),\n        Perlin2D(vec2(time_scaled, st.x + time_scaled) * 3.5) / 1.5,\n        st.x * 0.3\n    );\n\n    float y = 0.5 + (perc - 0.5) * distance + xnoise / 2.0 * finalAmplitude;\n\n    float line_start = smoothstep(\n        y + (width / 2.0) + (u_line_blur * pixel(1.0, iResolution.xy) * blur),\n        y,\n        st.y\n    );\n\n    float line_end = smoothstep(\n        y,\n        y - (width / 2.0) - (u_line_blur * pixel(1.0, iResolution.xy) * blur),\n        st.y\n    );\n\n    return clamp(\n        (line_start - line_end) * (1.0 - smoothstep(0.0, 1.0, pow(perc, 0.3))),\n        0.0,\n        1.0\n    );\n}\n\nvoid mainImage(out vec4 fragColor, in vec2 fragCoord) {\n    vec2 uv = fragCoord / iResolution.xy;\n\n    float line_strength = 1.0;\n    for (int i = 0; i < u_line_count; i++) {\n        float p = float(i) / float(u_line_count);\n        line_strength *= (1.0 - lineFn(\n            uv,\n            u_line_width * pixel(1.0, iResolution.xy) * (1.0 - p),\n            p,\n            (PI * 1.0) * p,\n            uMouse,\n            iTime,\n            uAmplitude,\n            uDistance\n        ));\n    }\n\n    float colorVal = 1.0 - line_strength;\n    fragColor = vec4(uColor * colorVal, colorVal);\n}\n\nvoid main() {\n    mainImage(gl_FragColor, gl_FragCoord.xy);\n}\n`;\n\nconst resize = () => {\n  if (!containerRef.value || !renderer || !program) return;\n\n  const container = containerRef.value;\n  const { clientWidth, clientHeight } = container;\n  renderer.setSize(clientWidth, clientHeight);\n  program.uniforms.iResolution.value.r = clientWidth;\n  program.uniforms.iResolution.value.g = clientHeight;\n  program.uniforms.iResolution.value.b = clientWidth / clientHeight;\n};\n\nconst handleMouseMove = (e: MouseEvent) => {\n  if (!containerRef.value) return;\n\n  const rect = containerRef.value.getBoundingClientRect();\n  const x = (e.clientX - rect.left) / rect.width;\n  const y = 1.0 - (e.clientY - rect.top) / rect.height;\n  targetMouse = [x, y];\n};\n\nconst handleMouseLeave = () => {\n  targetMouse = [0.5, 0.5];\n};\n\nconst update = (t: number) => {\n  if (!program || !renderer || !mesh) return;\n\n  if (props.enableMouseInteraction) {\n    const smoothing = 0.05;\n    currentMouse[0] += smoothing * (targetMouse[0] - currentMouse[0]);\n    currentMouse[1] += smoothing * (targetMouse[1] - currentMouse[1]);\n    program.uniforms.uMouse.value[0] = currentMouse[0];\n    program.uniforms.uMouse.value[1] = currentMouse[1];\n  } else {\n    program.uniforms.uMouse.value[0] = 0.5;\n    program.uniforms.uMouse.value[1] = 0.5;\n  }\n\n  program.uniforms.iTime.value = t * 0.001;\n  renderer.render({ scene: mesh });\n  animationId = requestAnimationFrame(update);\n};\n\nconst initializeScene = () => {\n  if (!containerRef.value) return;\n\n  cleanup();\n\n  const container = containerRef.value;\n  renderer = new Renderer({ alpha: true });\n  gl = renderer.gl;\n  gl.clearColor(0, 0, 0, 0);\n  gl.enable(gl.BLEND);\n  gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);\n\n  const geometry = new Triangle(gl);\n  program = new Program(gl, {\n    vertex: vertexShader,\n    fragment: fragmentShader,\n    uniforms: {\n      iTime: { value: 0 },\n      iResolution: {\n        value: new Color(gl.canvas.width, gl.canvas.height, gl.canvas.width / gl.canvas.height)\n      },\n      uColor: { value: new Color(...props.color) },\n      uAmplitude: { value: props.amplitude },\n      uDistance: { value: props.distance },\n      uMouse: { value: new Float32Array([0.5, 0.5]) }\n    }\n  });\n\n  mesh = new Mesh(gl, { geometry, program });\n\n  const canvas = gl.canvas as HTMLCanvasElement;\n  canvas.style.width = '100%';\n  canvas.style.height = '100%';\n  canvas.style.display = 'block';\n\n  container.appendChild(canvas);\n\n  window.addEventListener('resize', resize);\n  if (props.enableMouseInteraction) {\n    container.addEventListener('mousemove', handleMouseMove);\n    container.addEventListener('mouseleave', handleMouseLeave);\n  }\n\n  resize();\n  animationId = requestAnimationFrame(update);\n};\n\nconst cleanup = () => {\n  if (animationId) {\n    cancelAnimationFrame(animationId);\n    animationId = null;\n  }\n\n  window.removeEventListener('resize', resize);\n\n  if (containerRef.value) {\n    containerRef.value.removeEventListener('mousemove', handleMouseMove);\n    containerRef.value.removeEventListener('mouseleave', handleMouseLeave);\n\n    const canvas = containerRef.value.querySelector('canvas');\n    if (canvas) {\n      containerRef.value.removeChild(canvas);\n    }\n  }\n\n  if (gl) {\n    gl.getExtension('WEBGL_lose_context')?.loseContext();\n  }\n\n  renderer = null;\n  gl = null;\n  program = null;\n  mesh = null;\n  currentMouse = [0.5, 0.5];\n  targetMouse = [0.5, 0.5];\n};\n\nonMounted(() => {\n  initializeScene();\n});\n\nonUnmounted(() => {\n  cleanup();\n});\n\nwatch(\n  [() => props.color, () => props.amplitude, () => props.distance, () => props.enableMouseInteraction],\n  () => {\n    initializeScene();\n  },\n  { deep: true }\n);\n</script>\n","path":"Threads/Threads.vue","_imports_":[],"registryDependencies":[],"dependencies":[],"devDependencies":[]}],"registryDependencies":[],"dependencies":[{"ecosystem":"js","name":"ogl","version":"^1.0.11"}],"devDependencies":[],"categories":["Backgrounds"]}