增加背景样式种类

2025-12-06 12:55:26 +08:00
parent b9691b0965
commit f41e9757bf
4 changed files with 415 additions and 11 deletions
@@ -0,0 +1,206 @@
+<template>
+  <canvas ref="canvas" class="bg-gradient"></canvas>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted, onBeforeUnmount } from 'vue'
+
+const canvas = ref<HTMLCanvasElement | null>(null)
+let ctx: CanvasRenderingContext2D | null = null
+let width = 0
+let height = 0
+let raf = 0
+let running = true
+
+// Mouse interaction
+const mouse = { x: 0, y: 0, tx: 0, ty: 0 }
+
+function parseColor(c: string): [number, number, number] {
+  if (!c) return [0, 0, 0]
+  if (c.startsWith('#')) {
+    const v = c.slice(1)
+    const n = v.length === 3 ? v.split('').map(ch => ch + ch).join('') : v
+    const r = parseInt(n.slice(0, 2), 16)
+    const g = parseInt(n.slice(2, 4), 16)
+    const b = parseInt(n.slice(4, 6), 16)
+    return [r, g, b]
+  }
+  return [255, 255, 255]
+}
+
+function getThemeColors() {
+  const cs = getComputedStyle(document.documentElement)
+  const accent = parseColor(cs.getPropertyValue('--color-accent').trim())
+  const primary = parseColor(cs.getPropertyValue('--color-bg-primary').trim())
+  
+  return { accent, primary }
+}
+
+function resize() {
+  if (!canvas.value) return
+  width = window.innerWidth
+  height = window.innerHeight
+  canvas.value.width = width
+  canvas.value.height = height
+}
+
+// Mesh points
+interface Point {
+  x: number
+  y: number
+  originX: number
+  originY: number
+  noiseOffsetX: number
+  noiseOffsetY: number
+}
+
+const points: Point[] = []
+const gridSize = 100 // Size of mesh cells
+
+function initMesh() {
+  points.length = 0
+  const cols = Math.ceil(width / gridSize) + 2
+  const rows = Math.ceil(height / gridSize) + 2
+  
+  for (let i = 0; i < cols; i++) {
+    for (let j = 0; j < rows; j++) {
+      const x = (i - 1) * gridSize
+      const y = (j - 1) * gridSize
+      points.push({
+        x,
+        y,
+        originX: x,
+        originY: y,
+        noiseOffsetX: Math.random() * 1000,
+        noiseOffsetY: Math.random() * 1000
+      })
+    }
+  }
+}
+
+function draw() {
+  if (!ctx) return
+  
+  ctx.clearRect(0, 0, width, height)
+  
+  // Smooth mouse
+  mouse.x += (mouse.tx - mouse.x) * 0.05
+  mouse.y += (mouse.ty - mouse.y) * 0.05
+  
+  const time = performance.now() / 2000
+  const { accent, primary } = getThemeColors()
+  
+  // Update points
+  points.forEach(p => {
+    // Simplex-like noise movement (simplified with sine/cos)
+    const noiseX = Math.sin(time + p.noiseOffsetX) * 30
+    const noiseY = Math.cos(time + p.noiseOffsetY) * 30
+    
+    // Mouse influence (gentle push)
+    const dx = mouse.x - p.originX
+    const dy = mouse.y - p.originY
+    const dist = Math.sqrt(dx*dx + dy*dy)
+    const maxDist = 400
+    let mouseX = 0
+    let mouseY = 0
+    
+    if (dist < maxDist) {
+      const force = Math.pow(1 - dist / maxDist, 2) * 40
+      const angle = Math.atan2(dy, dx)
+      mouseX = Math.cos(angle) * force
+      mouseY = Math.sin(angle) * force
+    }
+    
+    p.x = p.originX + noiseX - mouseX
+    p.y = p.originY + noiseY - mouseY
+  })
+  
+  // Draw mesh
+  ctx.lineWidth = 1
+  // Create gradient for lines
+  const gradient = ctx.createLinearGradient(0, 0, width, height)
+  gradient.addColorStop(0, `rgba(${accent[0]}, ${accent[1]}, ${accent[2]}, 0.05)`)
+  gradient.addColorStop(0.5, `rgba(${accent[0]}, ${accent[1]}, ${accent[2]}, 0.1)`)
+  gradient.addColorStop(1, `rgba(${accent[0]}, ${accent[1]}, ${accent[2]}, 0.05)`)
+  
+  ctx.strokeStyle = gradient
+  
+  const cols = Math.ceil(width / gridSize) + 2
+  const rows = Math.ceil(height / gridSize) + 2
+  
+  // Draw connections
+  ctx.beginPath()
+  for (let i = 0; i < cols; i++) {
+    for (let j = 0; j < rows; j++) {
+      const index = i * rows + j
+      const p = points[index]
+      
+      if (i < cols - 1) {
+        const right = points[(i + 1) * rows + j]
+        if (p) ctx.moveTo(p.x, p.y)
+        if (right) ctx.lineTo(right.x, right.y)
+      }
+      
+      if (j < rows - 1) {
+        const bottom = points[i * rows + (j + 1)]
+        if (p) ctx.moveTo(p.x, p.y)
+        if (bottom) ctx.lineTo(bottom.x, bottom.y)
+      }
+    }
+  }
+  ctx.stroke()
+  
+  // Fill subtle gradient background
+  const bgGradient = ctx.createRadialGradient(
+    mouse.x, mouse.y, 0,
+    mouse.x, mouse.y, Math.max(width, height)
+  )
+  bgGradient.addColorStop(0, `rgba(${accent[0]}, ${accent[1]}, ${accent[2]}, 0.03)`)
+  bgGradient.addColorStop(1, 'rgba(0,0,0,0)')
+  
+  ctx.fillStyle = bgGradient
+  ctx.fillRect(0, 0, width, height)
+}
+
+function loop() {
+  if (!running) return
+  draw()
+  raf = requestAnimationFrame(loop)
+}
+
+function onMouseMove(e: MouseEvent) {
+  mouse.tx = e.clientX
+  mouse.ty = e.clientY
+}
+
+function onResize() {
+  resize()
+  initMesh()
+}
+
+onMounted(() => {
+  if (!canvas.value) return
+  ctx = canvas.value.getContext('2d')
+  resize()
+  initMesh()
+  window.addEventListener('resize', onResize)
+  window.addEventListener('mousemove', onMouseMove)
+  raf = requestAnimationFrame(loop)
+})
+
+onBeforeUnmount(() => {
+  running = false
+  cancelAnimationFrame(raf)
+  window.removeEventListener('resize', onResize)
+  window.removeEventListener('mousemove', onMouseMove)
+})
+</script>
+
+<style scoped>
+.bg-gradient {
+  position: fixed;
+  inset: 0;
+  z-index: 0;
+  pointer-events: none;
+}
+</style>
@@ -0,0 +1,153 @@
+<template>
+  <canvas ref="canvas" class="bg-grid"></canvas>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted, onBeforeUnmount } from 'vue'
+
+const canvas = ref<HTMLCanvasElement | null>(null)
+let ctx: CanvasRenderingContext2D | null = null
+let width = 0
+let height = 0
+let raf = 0
+let running = true
+
+// Mouse interaction
+const mouse = { x: 0, y: 0, tx: 0, ty: 0 }
+
+// Grid properties
+const gridSize = 50 // Increased grid size for cleaner look
+let offset = 0
+
+function parseColor(c: string): [number, number, number] {
+  if (!c) return [0, 0, 0]
+  if (c.startsWith('#')) {
+    const v = c.slice(1)
+    const n = v.length === 3 ? v.split('').map(ch => ch + ch).join('') : v
+    const r = parseInt(n.slice(0, 2), 16)
+    const g = parseInt(n.slice(2, 4), 16)
+    const b = parseInt(n.slice(4, 6), 16)
+    return [r, g, b]
+  }
+  return [255, 255, 255]
+}
+
+function getThemeColors() {
+  const cs = getComputedStyle(document.documentElement)
+  const accent = parseColor(cs.getPropertyValue('--color-accent').trim())
+  const text = parseColor(cs.getPropertyValue('--color-text-primary').trim())
+  
+  return { accent, text }
+}
+
+function resize() {
+  if (!canvas.value) return
+  width = window.innerWidth
+  height = window.innerHeight
+  canvas.value.width = width
+  canvas.value.height = height
+}
+
+function draw() {
+  if (!ctx) return
+  
+  // Clear canvas
+  ctx.clearRect(0, 0, width, height)
+  
+  // Smooth mouse
+  mouse.x += (mouse.tx - mouse.x) * 0.1
+  mouse.y += (mouse.ty - mouse.y) * 0.1
+  
+  const { accent, text } = getThemeColors()
+  const time = performance.now() / 1000
+  
+  // Moving grid effect
+  offset = (time * 20) % gridSize // Slower movement
+  
+  ctx.lineWidth = 1
+  
+  // Draw vertical lines
+  for (let x = 0; x <= width; x += gridSize) {
+    const dx = x - mouse.x
+    const dist = Math.abs(dx)
+    const maxDist = 400
+    
+    let drawX = x
+    let alpha = 0.03 // Very subtle base opacity
+    
+    if (dist < maxDist) {
+      const force = Math.cos((dist / maxDist) * Math.PI / 2)
+      drawX += (dx > 0 ? 1 : -1) * force * 15
+      alpha += force * 0.08 // Subtle highlight
+    }
+    
+    const [r, g, b] = x % (gridSize * 4) === 0 ? accent : text
+    ctx.strokeStyle = `rgba(${r}, ${g}, ${b}, ${alpha})`
+    
+    ctx.beginPath()
+    ctx.moveTo(drawX, 0)
+    ctx.lineTo(drawX, height)
+    ctx.stroke()
+  }
+  
+  // Draw horizontal lines
+  for (let y = offset; y <= height; y += gridSize) {
+    const dy = y - mouse.y
+    const dist = Math.abs(dy)
+    const maxDist = 400
+    
+    let drawY = y
+    let alpha = 0.03
+    
+    if (dist < maxDist) {
+      const force = Math.cos((dist / maxDist) * Math.PI / 2)
+      drawY += (dy > 0 ? 1 : -1) * force * 15
+      alpha += force * 0.08
+    }
+    
+    const [r, g, b] = Math.abs(y - offset) % (gridSize * 4) < 1 ? accent : text
+    ctx.strokeStyle = `rgba(${r}, ${g}, ${b}, ${alpha})`
+    
+    ctx.beginPath()
+    ctx.moveTo(0, drawY)
+    ctx.lineTo(width, drawY)
+    ctx.stroke()
+  }
+}
+
+function loop() {
+  if (!running) return
+  draw()
+  raf = requestAnimationFrame(loop)
+}
+
+function onMouseMove(e: MouseEvent) {
+  mouse.tx = e.clientX
+  mouse.ty = e.clientY
+}
+
+onMounted(() => {
+  if (!canvas.value) return
+  ctx = canvas.value.getContext('2d')
+  resize()
+  window.addEventListener('resize', resize)
+  window.addEventListener('mousemove', onMouseMove)
+  raf = requestAnimationFrame(loop)
+})
+
+onBeforeUnmount(() => {
+  running = false
+  cancelAnimationFrame(raf)
+  window.removeEventListener('resize', resize)
+  window.removeEventListener('mousemove', onMouseMove)
+})
+</script>
+
+<style scoped>
+.bg-grid {
+  position: fixed;
+  inset: 0;
+  z-index: 0;
+  pointer-events: none;
+}
+</style>