three.js 源码注释（九十四）extras/core/Shape.js

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俺也是刚开始学,好多地儿肯定不对还请见谅.

以下代码是THREE.JS 源码文件中extras/core/Shape.js文件的注释.

更多更新在 : https://github.com/omni360/three.js.sourcecode

/**
 * @author zz85 / http://www.lab4games.net/zz85/blog
 * Defines a 2d shape plane using paths.
 **/

// STEP 1 Create a path.
// 1. 创建路径
// STEP 2 Turn path into shape.
// 2. 将路径变成截面
// STEP 3 ExtrudeGeometry takes in Shape/Shapes
// 3. 将截面拉伸成几何体
// STEP 3a - Extract points from each shape, turn to vertices
// 3a. 导出所有的截面顶点到vertices属性中
// STEP 3b - Triangulate each shape, add faces.
// 3b. 组织所有的顶点为三角面.
/*
///Shape对象将二维平面生成图形对象的抽象基类.
///
*/
///
Shape
THREE.Shape = function () {

	THREE.Path.apply( this, arguments );	//调用Path对象的call方法,将原本属于Path的方法交给当前对象Shape来使用.
	this.holes = [];	//将孔洞存放到holes数组中.

};
/*************************************************
****下面是Shape对象的方法属性定义,继承自Path对象.
**************************************************/
THREE.Shape.prototype = Object.create( THREE.Path.prototype );

/*
///extrude生成拉伸几何体的便利方法.
///
/// parameters = {
///
///  curveSegments: , // number of points on the curves 曲线上的顶点数量
///  steps: , // number of points for z-side extrusions / used for subdividing segements of extrude spline too 步数,曲线拉伸的细分线段数
///  amount: , // Depth to extrude the shape 拉伸线段的厚度.
///
///  bevelEnabled: , // turn on bevel 是否启用倒角
///  bevelThickness: , // how deep into the original shape bevel goes 倒角的厚度
///  bevelSize: , // how far from shape outline is bevel 从截面外轮廓倒角的尺寸.
///  bevelSegments: , // number of bevel layers 倒角部分的细分线段数.
///
///  extrudePath:  // 3d spline path to extrude shape along. (creates Frames if .frames aren't defined) 截面拉伸的路径,3d的spline对象.
///  frames:  // containing arrays of tangents, normals, binormals 包含三角形,法线,副法线数组.
///
///  material:  // material index for front and back faces 正面和背面材质索引
///  extrudeMaterial:  // material index for extrusion and beveled faces 拉伸体和斜面的材质索引
///  uvGenerator: