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import { useEffect, useId, useRef, useState } from "react"; import { useReducedMotion } from "motion/react"; export type ShaderHeroProps = { eyebrow?: string; title?: string; description?: string; actionLabel?: string; onAction?: () => void; className?: string; }; const vertexSource = `attribute vec2 position; void main() { gl_Position = vec4(position, 0.0, 1.0); }`; const fragmentSource = `precision mediump float; uniform vec2 resolution; uniform vec2 pointer; uniform float time; uniform float motion; float hash(vec2 p) { return fract(sin(dot(p, vec2(41.31, 289.23))) * 43758.5); } void main() { vec2 uv = gl_FragCoord.xy / resolution.xy; uv.x *= resolution.x / resolution.y; vec2 p = uv - vec2(.82, .54); p.x -= .28; float distanceToPointer = length(uv - pointer); float wave = sin((uv.x * 7. + uv.y * 4. + time * .45) + distanceToPointer * 16.) * .055 * motion; float arc = smoothstep(.61 + wave, .12 + wave, length(p + vec2(sin(time*.18)*.035, 0.0))); float rim = smoothstep(.13, .0, abs(length(p) - .32 - wave)); float grain = (hash(gl_FragCoord.xy) - .5) * .035; vec3 base = vec3(.025, .035, .06); vec3 bloom = vec3(.18, .75, .82) * arc + vec3(.85, .2, .47) * rim; vec3 color = base + bloom * (1. - distanceToPointer * .32) + grain; gl_FragColor = vec4(color, 1.0); }`; function compile(gl: WebGLRenderingContext, type: number, source: string) { const shader = gl.createShader(type); if (!shader) return null; gl.shaderSource(shader, source); gl.compileShader(shader); if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) { gl.deleteShader(shader); return null; } return shader; } export function ShaderHero({ eyebrow = "Spatial interface", title = "Make the atmosphere part of the product.", description = "A responsive field that holds its shape before interaction and bends gently around intent.", actionLabel = "Open field notes", onAction, className = "", }: ShaderHeroProps) { const reduced = useReducedMotion() === true; const headingId = useId(); const canvasRef = useRef(null); const visibleRef = useRef(true); const pointerRef = useRef({ x: 0.76, y: 0.46 }); const frameRef = useRef(null); const [supported, setSupported] = useState(true); useEffect(() => { const canvas = canvasRef.current; if (!canvas) return; const gl = canvas.getContext("webgl", { alpha: false, antialias: false, powerPreference: "low-power" }); if (!gl) { setSupported(false); return; } const vertex = compile(gl, gl.VERTEX_SHADER, vertexSource); const fragment = compile(gl, gl.FRAGMENT_SHADER, fragmentSource); if (!vertex || !fragment) { setSupported(false); if (vertex) gl.deleteShader(vertex); if (fragment) gl.deleteShader(fragment); return; } const program = gl.createProgram(); if (!program) { setSupported(false); return; } gl.attachShader(program, vertex); gl.attachShader(program, fragment); gl.linkProgram(program); if (!gl.getProgramParameter(program, gl.LINK_STATUS)) { setSupported(false); gl.deleteProgram(program); return; } const buffer = gl.createBuffer(); if (!buffer) { setSupported(false); return; } gl.bindBuffer(gl.ARRAY_BUFFER, buffer); gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([-1, -1, 1, -1, -1, 1, -1, 1, 1, -1, 1, 1]), gl.STATIC_DRAW); const position = gl.getAttribLocation(program, "position"); const resolution = gl.getUniformLocation(program, "resolution"); const pointer = gl.getUniformLocation(program, "pointer"); const time = gl.getUniformLocation(program, "time"); const motion = gl.getUniformLocation(program, "motion"); const start = performance.now(); const resize = () => { const bounds = canvas.getBoundingClientRect(); const ratio = Math.min(window.devicePixelRatio || 1, 1.5); canvas.width = Math.max(1, Math.floor(bounds.width * ratio)); canvas.height = Math.max(1, Math.floor(bounds.height * ratio)); gl.viewport(0, 0, canvas.width, canvas.height); }; const draw = (now: number) => { frameRef.current = null; gl.useProgram(program); gl.bindBuffer(gl.ARRAY_BUFFER, buffer); gl.enableVertexAttribArray(position); gl.vertexAttribPointer(position, 2, gl.FLOAT, false, 0, 0); gl.uniform2f(resolution, canvas.width, canvas.height); gl.uniform2f(pointer, pointerRef.current.x, pointerRef.current.y); gl.uniform1f(time, reduced ? 0 : (now - start) / 1000); gl.uniform1f(motion, reduced ? 0 : 1); gl.drawArrays(gl.TRIANGLES, 0, 6); if (!reduced && visibleRef.current) frameRef.current = requestAnimationFrame(draw); }; const observer = new IntersectionObserver(([entry]) => { visibleRef.current = entry?.isIntersecting ?? false; if (visibleRef.current && frameRef.current === null) frameRef.current = requestAnimationFrame(draw); }, { threshold: 0.08 }); const resizeObserver = new ResizeObserver(() => { resize(); if (frameRef.current === null) frameRef.current = requestAnimationFrame(draw); }); resize(); observer.observe(canvas); resizeObserver.observe(canvas); frameRef.current = requestAnimationFrame(draw); return () => { observer.disconnect(); resizeObserver.disconnect(); if (frameRef.current !== null) cancelAnimationFrame(frameRef.current); gl.deleteBuffer(buffer); gl.deleteProgram(program); gl.deleteShader(vertex); gl.deleteShader(fragment); 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{title}