threejs打造一个三维铅笔签字绘画签名效果代码-html代码-BFW代码库

代码语言：html

所属分类：三维

代码描述：threejs打造一个三维铅笔签字绘画签名效果代码，可保存为png图片，支持手机端

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
<style>
    #mfPreviewBar {
  display: none !important;
}

html,
body {
  position: fixed;
  overflow: hidden;
  touch-action: none;
}

body {
  background-color: #f7f4f0;
  cursor: url("data:image/png;base64,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"), auto;
  font-family: "Galano Grotesque Semi Bold";
  margin: 0;
  overflow: hidden;
}

button {
  font-family: "Galano Grotesque Semi Bold";
}

.colours {
  bottom: 90px;
  display: none;
  left: 50%;
  list-style-type: none;
  padding-left: 0;
  position: absolute;
  transform: translateX(-50%);
  z-index: 10;
}
@media (min-width: 1024px) {
  .colours {
    display: flex;
  }
}
.colours li {
  border-radius: 50%;
  display: inline-block;
  height: 14px;
  margin: 0 12px;
  width: 14px;
}
.colours li:nth-child(1) {
  background-color: #100c08;
}
.colours li:nth-child(2) {
  background-color: #759BA9;
}
.colours li:nth-child(3) {
  background-color: #77dd77;
}
.colours li:nth-child(4) {
  background-color: #ff6961;
}
.colours li:nth-child(5) {
  background-color: #ffd1dc;
}

.pencil__border {
  bottom: 0;
  left: 0;
  pointer-events: none;
  position: absolute;
  right: 0;
  top: 0;
  z-index: 3;
}
.pencil__border div:nth-child(1), .pencil__border div:nth-child(2) {
  height: 100%;
  left: 0;
  position: absolute;
  top: 0;
  width: 100%;
}
.pencil__border div:nth-child(1):before, .pencil__border div:nth-child(1):after, .pencil__border div:nth-child(2):before, .pencil__border div:nth-child(2):after {
  background-color: #FF851B;
  content: "";
  opacity: 0.98;
  position: absolute;
}
.pencil__border div:nth-child(1):before {
  height: 20px;
  left: 20px;
  top: 0;
  width: 100%;
}
@media (min-width: 1024px) {
  .pencil__border div:nth-child(1):before {
    height: 60px;
    left: 55px;
  }
}
.pencil__border div:nth-child(1):after {
  bottom: 60px;
  height: 100%;
  left: 0;
  width: 20px;
}
@media (min-width: 1024px) {
  .pencil__border div:nth-child(1):after {
    bottom: 80px;
    width: 55px;
  }
}
.pencil__border div:nth-child(2):before {
  bottom: 0;
  right: 20px;
  height: 60px;
  width: 100%;
}
@media (min-width: 1024px) {
  .pencil__border div:nth-child(2):before {
    height: 80px;
    right: 55px;
  }
}
.pencil__border div:nth-child(2):after {
  bottom: 0;
  height: 100%;
  right: 0;
  width: 20px;
}
@media (min-width: 1024px) {
  .pencil__border div:nth-child(2):after {
    bottom: -60px;
    width: 55px;
  }
}

.pencil__border-inner {
  border: solid 1px #000;
  border-width: 2px;
  border-style: solid;
  bottom: 58px;
  left: 19px;
  position: absolute;
  right: 19px;
  top: 19px;
}
@media (min-width: 1024px) {
  .pencil__border-inner {
    bottom: 78px;
    left: 54px;
    right: 54px;
    top: 58px;
  }
}

.pencil__refresh {
  background-color: #FCF4EA;
  border: none;
  border-radius: 50%;
  bottom: 18px;
  cursor: pointer;
  height: 26px;
  padding: 4px 1px 0px;
  position: absolute;
  left: 50%;
  text-align: center;
  transform: translateX(-50%);
  width: auto;
  z-index: 3;
}
@media (min-width: 1024px) {
  .pencil__refresh {
    bottom: 27px;
    left: 80px;
    transform: none;
  }
}

.pencil__submit {
  bottom: 27px;
  display: none;
  position: absolute;
  right: 80px;
  z-index: 4;
}
@media (min-width: 1024px) {
  .pencil__submit {
    display: block;
  }
}

.btn {
  background-color: transparent;
  border: none;
  cursor: pointer;
  font-size: 13px;
  letter-spacing: 0.15em;
  outline: none;
  padding: 5px 10px 1px 10px;
  text-transform: uppercase;
  user-select: none;
  -moz-user-select: none;
}
</style>

</head>
<body>
<!-- partial:index.partial.html -->
<ul class="colours">
	<li></li>
	<li></li>
	<li></li>
	<li></li>
	<li></li>
</ul>
<div class="pencil__border">
	<div></div>
	<div></div>
	<div class="pencil__border-inner"></div>
</div>
<button class="pencil__refresh btn">
	刷新
</button>
<button class="pencil__submit btn">保存PNG</button>
<!-- partial -->

<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/three.84.js"></script>
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/MTLLoader.min.js"></script>
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/OBJLoader.min.js"></script>
<script>
    
    // -- Drawing
const colors = [
"#100c08",
"#759BA9",
"#77dd77",
"#ff6961",
"#ffd1dc"];


let currentColorIndex = 0;

let colorButtons = document.querySelectorAll('.colours li'),
colorButtonsL = colorButtons.length;

for (var x = 0; x < colorButtonsL; x++) {
  (x => {
    colorButtons[x].addEventListener('click', () => {
      setActiveColour(x);
    });
  })(x);
}

function setActiveColour(x) {
  currentColorIndex = x;
}

// -- Drawing
const drawingCanvas = document.createElement('canvas');
drawingCanvas.width = window.innerWidth;
drawingCanvas.height = window.innerHeight;

drawingCanvas.style.position = 'fixed';
drawingCanvas.style.left = 0;
drawingCanvas.style.top = 0;
drawingCanvas.style.zIndex = 1;

document.body.appendChild(drawingCanvas);

var drawingCtx = drawingCanvas.getContext('2d');

let isDrawing,
newlyUp = false,
lastPoint;

let pencilPathDefaults = {
  minThickness: .2,
  maxThickness: 2 };


let pencilPathCurrent = {
  thickness: .2 };


let pencilPathTarget = {
  thickness: .2 };


document.addEventListener('touchstart', handleMouseDown);
document.addEventListener('mousedown', handleMouseDown);

function handleMouseDown(e) {
  if (e.target.localName !== 'canvas') return;
  isDrawing = true;
  pencilTargetPos.height = 0;
  pencilTargetPos.heightRotate = .2;

  pencilPathTarget.thickness = pencilPathDefaults.maxThickness;

  let xPos = e.touches ? e.touches[0].clientX : e.clientX,
  yPos = e.touches ? e.touches[0].clientY : e.clientY;

  let currentPoint = { x: xPos, y: yPos };

  drawingCtx.beginPath();
  drawingCtx.fillStyle = colors[currentColorIndex];
  drawingCtx.globalAlpha = .9;
  drawingCtx.arc(
  currentPoint.x + 5, currentPoint.y + 5, pencilPathDefaults.thickness,
  false, Math.PI * 2, false);
  drawingCtx.fill();

  lastPoint = currentPoint;
}

document.addEventListener('touchend', handleMouseUp);
document.addEventListener('mouseup', handleMouseUp);

function handleMouseUp() {
  newlyUp = true;
  isDrawing = false;
  pencilTargetPos.height = pencilDefaultPos.height;
  pencilTargetPos.heightRotate = 0;
  pencilPathTarget.thickness = pencilPathDefaults.minThickness;

  setTimeout(fullyUp, 50);
}

function fullyUp() {
  newlyUp = false;
}

// -- Pencil
// Renderer
var renderer = new THREE.WebGLRenderer({
  alpha: true,
  antialias: true,
  autoClear: true });


renderer.setClearColor(0x000000, 0);
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.domElement.style.zIndex = 5;
renderer.domElement.style.position = 'relative';
renderer.domElement.style.pointerEvents = 'none';
document.body.appendChild(renderer.domElement);

// Ensure Full Screen on Resize
function fullScreen() {
  camera.aspect = window.innerWidth / window.innerHeight;
  camera.updateProjectionMatrix();

  renderer.setSize(window.innerWidth, window.innerHeight);
}

window.addEventListener('resize', fullScreen, false);

// Scene
var scene = new THREE.Scene();

// Lighting

let hemiLight,
dirLight;

function createLights() {
  hemiLight = new THREE.HemisphereLight(0xffffff, 0xffffff, 0.6);
  hemiLight.color.setHSL(0.6, 1, 0.2);
  hemiLight.groundColor.setHSL(0.095, 1, 0.75);
  hemiLight.position.set(0, 0, 50);
  scene.add(hemiLight);
  hemiLightHelper = new THREE.HemisphereLightHelper(hemiLight, 10);
  // scene.add( hemiLightHelper )

  directionalLight = new THREE.DirectionalLight(0xffffff, 1);
  directionalLight.color.setHSL(1, 1, 1);
  directionalLight.position.set(-.5, 1, 10);
  scene.add(directionalLight);
  directionalLight.castShadow = true;
  directionalLight.shadow.mapSize.width = 2048;
  directionalLight.shadow.mapSize.height = 204.........完整代码请登录后点击上方下载按钮下载查看