在three.js中拉伸一行

本文介绍了在three.js中拉伸一行的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一条线(点)，我想挤出它.

I have a line (of points) and I want to extrude it.

实现这一目标的简单方法是什么?

What would be a simple way to achieve this?

推荐答案

我找到了解决方案.不确定这是否是最好的方法，因为three.js会抛出信息以改用PlaneBufferGeometry.

I've found a solution. Not sure if this is the best way because three.js throws an info to use PlaneBufferGeometry instead.

function extrudePath( points, depth ) {
  var geometry = new THREE.PlaneGeometry(0, 0, points.length - 1, 1);
  var vertices = geometry.vertices; 

  for (var i = 0, l = points.length, p; i < l; i++) {
    p = points[i];

    vertices[i].x = vertices[i + l].x = p[0];
    vertices[i].y = vertices[i + l].y = p[1];

    vertices[i].z = p[2];
    vertices[i + l].z = p[2] + depth;
  }

  geometry.computeFaceNormals();

  return geometry;
}

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