html点线面制作,利用HTML5绘制点线面组成的3D图形的示例

最新推荐文章于 2023-07-20 16:20:02 发布

Craig Fedewidget

最新推荐文章于 2023-07-20 16:20:02 发布

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文章标签： html点线面制作

本文介绍了一个简单的三维立方体类 Cube 的实现方式，该类通过设置边长并初始化顶点坐标来构建立方体，并定义了绘制立方体各面的方法。每个面使用不同的颜色进行区分，并按 z 轴顺序排序以确保正确的视觉层次。

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var Cube = function(length){ this.length = length;

this.faces = []; this.vectors = [];

} Cube.prototype = {

_initVector:function(){ this.vectors[0] = new Vector(-this.length/2 , -this.length/2 , this.length/2);

this.vectors[1] = new Vector(-this.length/2 , this.length/2 , this.length/2); this.vectors[2] = new Vector(this.length/2 , -this.length/2 , this.length/2);

this.vectors[3] = new Vector(this.length/2 , this.length/2 , this.length/2); this.vectors[4] = new Vector(this.length/2 , -this.length/2 , -this.length/2);

this.vectors[5] = new Vector(this.length/2 , this.length/2 , -this.length/2); this.vectors[6] = new Vector(-this.length/2 , -this.length/2 , -this.length/2);

this.vectors[7] = new Vector(-this.length/2 , this.length/2 , -this.length/2); },

_draw:function(){ this.faces[0] = new Face(this.vectors[0] , this.vectors[1] , this.vectors[3] , this.vectors[2] , "#6c6");

this.faces[1] = new Face(this.vectors[2] , this.vectors[3] , this.vectors[5] , this.vectors[4] , "#6cc"); this.faces[2] = new Face(this.vectors[4] , this.vectors[5] , this.vectors[7] , this.vectors[6] , "#cc6");

this.faces[3] = new Face(this.vectors[6] , this.vectors[7] , this.vectors[1] , this.vectors[0] , "#c6c"); this.faces[4] = new Face(this.vectors[1] , this.vectors[3] , this.vectors[5] , this.vectors[7] , "#666");

this.faces[5] = new Face(this.vectors[0] , this.vectors[2] , this.vectors[4] , this.vectors[6] , "#ccc");

this.faces.sort(function(a , b){ return b.zIndex - a.zIndex;

}); this.faces.foreach(function(){

this.draw(); })

} }