Aframe VR弯曲的平面和文本

时间:2017-07-13 15:20:09

标签: javascript virtual-reality aframe

Aframe API支持曲面图像。然而,除了曲线图像,我想制作弯曲的文字和平面。有人可以帮我解决这个问题吗?

我想我必须创建一个实体,但我不知道必须设置哪些属性。

2 个答案:

答案 0 :(得分:2)

我使用https://github.com/mayognaise/aframe-html-shader创建弯曲文字。弯曲文本是一个部分圆柱体,使用repeat: -1 1在内部渲染材料。

HTML着色器使用HTML为我们创建纹理,我们可以将其用于文本,然后将该纹理应用于圆柱体。不幸的是,我们必须手动应用repeat: -1 1,因为该选项未公开。粗略的想法......

<!DOCTYPE html>
<html>
  <head>
    <title>Hello, WebVR! - A-Frame</title>
    <meta name="description" content="Hello, WebVR! - A-Frame">
    <script src="https://aframe.io/releases/0.6.0/aframe.min.js"></script>
    <script src="https://unpkg.com/aframe-html-shader@0.2.0/dist/aframe-html-shader.min.js">
  </head>
  <body>
    <script>
      AFRAME.registerComponent('update-repeat', {
        dependencies: ['material'], 

        init: function () {
          var texture = this.el.components.material.material.map;
          texture.repeat = new THREE.Vector2(-1, 1);
          texture.needsUpdate = true;
        }
      });
    </script>

    <div id="texture" style="width: 100%; height: 100%; position: fixed; left: 0; top: 0; z-index: -1; overflow: hidden">
      <p style="position: relative; top: 20px; font-size: 72px">HELLO HELLO</p>
      <p style="position: relative; top: 20px; font-size: 48px">curvy text</p>
    </div>

    <a-scene>
      <a-entity geometry="primitive: cylinder; radius: 2; segmentsRadial: 48; thetaLength: -160; openEnded: true"       
                material="shader: html; target: #texture; side: double; width: 500; height: 300; transparent: true" update-repeat position="0 0 -4" rotation="0 -90 0"></a-entity>
      <a-sky color="#FAFAFA"></a-sky>
    </a-scene>
  </body>
</html>

请参阅此example glitch I made for full answer

https://aframe-curved-text.glitch.me/

答案 1 :(得分:0)

只需使用带有src =“#canvas”的a-curvedimage。您可以在画布中生成所需的内容。

<!DOCTYPE html>
<html>
    <head>
        <script src="https://aframe.io/releases/1.0.3/aframe.min.js"></script>
    </head>
    <body>

    <a-scene>
        <a-assets>
            <canvas id="myCanvas"></canvas>
        </a-assets>

        <a-curvedimage
            src="#myCanvas"
            radius="2"
            theta-length="30"
            rotation="0 160 0"
            >        
        </a-curvedimage>
    </a-scene>

    <script>
        var canvas = document.getElementById("myCanvas");
        var ctx = canvas.getContext("2d");
        ctx.fillStyle = "#000"
        ctx.font = "22px sans-serif";
        ctx.fillText("Lorem ipsum dolor sit amet", 0, 30);
    </script>
</body>
</html>