diff --git a/components/background.tsx b/components/background.tsx new file mode 100644 index 0000000..41a61cb --- /dev/null +++ b/components/background.tsx @@ -0,0 +1,162 @@ +import React, { useEffect } from 'react' +import { PerspectiveCamera, Scene, BufferGeometry, BufferAttribute, ShaderMaterial, Color, Points, WebGLRenderer, Camera } from 'three' + +import '../styles/backgorund.styl' + +// const SEPARATION = 150, AMOUNTX = 200, AMOUNTY = 200, HEIGHT = 75 +const SEPARATION = 150, AMOUNTX = 50, AMOUNTY = 50, HEIGHT = 75 + +let container: HTMLElement | null +let camera: PerspectiveCamera +let scene: Scene +let renderer: WebGLRenderer + +let count = 1 +let particles: Points + +let mouseX = 0 +let mouseY = 0 +let windowHalfX = window.innerWidth / 2 +let windowHalfY = window.innerHeight / 2 + +function init() { + container = window.document.getElementById('bg') || document.createElement('div') + + document.body.appendChild(container) + camera = new PerspectiveCamera(75, window.innerWidth / window.innerHeight, 1, 10000000) + scene = new Scene() + + const numParticles = AMOUNTX * AMOUNTY + const positions = new Float32Array(numParticles * 3) + const scales = new Float32Array(numParticles) + + let i = 0, j = 0 + for (let ix = 0; ix < AMOUNTX; ix++) { + for (let iy = 0; iy < AMOUNTY; iy++) { + positions[i] = ix * SEPARATION - ((AMOUNTX * SEPARATION) / 2) // x + positions[i + 1] = 0 // y + positions[i + 2] = iy * SEPARATION - ((AMOUNTY * SEPARATION) / 2) // z + scales[j] = 1 + i += 3 + j++ + } + } + + const geometry = new BufferGeometry() + geometry.setAttribute('position', new BufferAttribute(positions, 3)) + geometry.setAttribute('scale', new BufferAttribute(scales, 1)) + + const material = new ShaderMaterial({ + uniforms: { + color: { value: new Color(0xffffff) }, + }, + vertexShader: document.getElementById('vertexshader')?.textContent || '', + fragmentShader: document.getElementById('fragmentshader')?.textContent || '' + }) + + particles = new Points(geometry, material) + scene.add(particles) + + renderer = new WebGLRenderer({ antialias: true }) + renderer.setPixelRatio(window.devicePixelRatio) + renderer.setSize(window.innerWidth, window.innerHeight) + + container.appendChild(renderer.domElement) + document.addEventListener('mousemove', onDocumentMouseMove, false) + document.addEventListener('touchstart', onDocumentTouchStart, false) + document.addEventListener('touchmove', onDocumentTouchMove, false) + + window.addEventListener('resize', onWindowResize, false) +} + +function onWindowResize() { + windowHalfX = window.innerWidth / 2 + windowHalfY = window.innerHeight / 2 + camera.aspect = window.innerWidth / window.innerHeight + camera.updateProjectionMatrix() + renderer.setSize(window.innerWidth, window.innerHeight) +} + +function setMouse(x: number, y: number) { + mouseX = (x - windowHalfX) / windowHalfX + mouseY = -(y - windowHalfY) / windowHalfY +} + + +function onDocumentMouseMove(event: MouseEvent) { + setMouse(event.clientX, event.clientY) +} + +function onDocumentTouchStart(event: TouchEvent) { + if (event.touches.length === 1) { + event.preventDefault() + setMouse(event.touches[0].pageX, event.touches[0].pageY) + } +} + +function onDocumentTouchMove(event: TouchEvent) { + if (event.touches.length === 1) { + event.preventDefault() + setMouse(event.touches[0].pageX, event.touches[0].pageY) + } +} + +function animate() { + requestAnimationFrame(animate) + render() +} + +function render() { + // Noence from 0.0 to 1.0 + const noence = (Math.sin(count / 4) + 1) / 2 + const noence_inv = 1 - noence + + camera.position.x = -mouseX * 500 + camera.position.y = 1000 - mouseY * 500 + camera.position.z = 1000 - mouseY * 250 + camera.lookAt(scene.position) + + if (particles.geometry instanceof BufferGeometry) { + const positions = particles.geometry.attributes.position.array + const scales = particles.geometry.attributes.scale.array + let i = 0, j = 0 + for (let ix = 0; ix < AMOUNTX; ix++) { + for (let iy = 0; iy < AMOUNTY; iy++) { + const dx = Math.sin((ix + count) * 0.3) + const dy = Math.sin((iy + count) * 0.5) + // @ts-ignore + positions[i + 1] = (dx * HEIGHT) + (dy * HEIGHT) + // @ts-ignore + scales[j] = (dx + 1) * 8 + (dy + 1) * 8 + i += 3 + j++ + } + } + + + // @ts-ignore + particles.material.uniforms.color.value.setRGB(1 - 0.5 * noence_inv, 0.2 + 0.8 * noence, 1) + if (particles.geometry.attributes.position instanceof BufferAttribute) + particles.geometry.attributes.position.needsUpdate = true + if (particles.geometry.attributes.scale instanceof BufferAttribute) + particles.geometry.attributes.scale.needsUpdate = true + + } + renderer.render(scene, camera) + + count += 0.05 + (0.01 * noence) +} + +const Background: React.FC = ({ children }) => { + + useEffect(() => { + init() + animate() + }, []) + + return