zoukankan      html  css  js  c++  java
  • threejs结合svg

    svg做的demo

    https://www.html5tricks.com/tag/svg/

    在线制作svg

    http://tools.jb51.net/static/api/svg/index.html

    3维文字

    svg文字

     3维的显示好看点,但是不能修改,必须删除原有的3维对象再创建新的,这样很麻烦,尤其不适合显示实时改动的数据

    svg文字效果上好像是差一点,但是便于修改,所以最终决定采用svg的方式

    为了方便改动,那为什么不直接使用html标签?因为html标签的文字font-size最小只能显示到7好些,不太记得了,总之不适合这里的小框框,用html总是显示半行就显示不下了

    其他方案:

    1:可以直接像图上的table那样,直接在二维平面展示数据,不好的地方是平面上放太多东西就会使3维的可见区域变小

    2:可以使用threejs的css2d,没有什么大的缺点,就是单纯因为我做这个css2d的标签做的不好看不想用

    上svg的代码:

        createPlane(w, h, position, rotation) {
     
            // 基础网格材质
            var material = new THREE.MeshBasicMaterial({
              color: 0x000000,
              opacity: 0.0,
              side: THREE.DoubleSide
            });
         
            // 平面缓冲几何体
            var geometry = new THREE.PlaneGeometry(w, h);
         
            var mesh = new THREE.Mesh(geometry, material);
         
            mesh.position.x = position.x;
            mesh.position.y = position.y;
            mesh.position.z = position.z;
         
            mesh.rotation.x = rotation.x;
            mesh.rotation.y = rotation.y;
            mesh.rotation.z = rotation.z;
         
            return mesh;
        },
    
        createCssObject(w, h, position, rotation) {
     
            var html = [
         
              '<svg width="' + (w + 1) + '" height="' + (h + 1) + '" viewBox="-10 -5 200 70" preserveAspectRatio="xMinYMid meet" xmlns="http://www.w3.org/2000/svg">',
              '<g>',
              '  <text xml:space="preserve" id="wendu" text-anchor="start" font-family="Helvetica, Arial, sans-serif" font-size="24" id="svg_1" y="22" x="0" stroke-width="0" stroke="#fff" fill="#fff">温度:22℃</text>',
              '  <text xml:space="preserve" id="shidu" text-anchor="start" font-family="Helvetica, Arial, sans-serif" font-size="24" id="svg_2" y="57" x="0" stroke-width="0" stroke="#fff" fill="#fff">湿度:80%</text>',
              '</g>',
              '</svg>'
         
            ].join('\n');
         
            var div = document.createElement('div');
            div.style.background = "#505088" // #505088  1d6166
            div.innerHTML = html
         
            var cssObject = new CSS3DObject(div);
         
            cssObject.position.x = position.x;
            cssObject.position.y = position.y;
            cssObject.position.z = position.z;
         
            cssObject.rotation.x = rotation.x;
            cssObject.rotation.y = rotation.y;
            cssObject.rotation.z = rotation.z;
         
            return cssObject;
        },
    
        create3dPage(w, h, position, rotation) {
            var plane = My3D.createPlane(w, h, position, rotation);
            My3D.glScene.add(plane);
         
            var cssObject = My3D.createCssObject(w, h, position, rotation);
            My3D.cssScene.add(cssObject);
        },
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  • 原文地址:https://www.cnblogs.com/LcxSummer/p/15572259.html
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