126 lines
3.9 KiB
Markdown
126 lines
3.9 KiB
Markdown
Wirefram
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场景中渲染线条的对象
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1.
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// 用Geometry 创建线框
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protected createWireframeForGeometry() {
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// 创建一个cube Mesh
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var cube: egret3d.Mesh = new egret3d.Mesh(new egret3d.CubeGeometry(100, 100, 100), new egret3d.ColorMaterial(0x333333));
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this.view.addChild3D(cube);
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cube.x = 500;
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// 用cube 的Geometry 创建线框
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var cubeWireframe: egret3d.Wireframe = new egret3d.Wireframe();
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cubeWireframe.fromGeometry(cube.geometry);
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// 把cube的线框绑定在cube 上
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cube.addChild(cubeWireframe);
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// 创建一个球 Mesh
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var s: egret3d.Mesh = new egret3d.Mesh(new egret3d.SphereGeometry(100, 20, 20), new egret3d.ColorMaterial(0x333333));
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this.view.addChild3D(s);
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// 打开球的包围盒 显示包围盒
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s.bound.visible = true;
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s.x = 800;
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// 用球 的Geometry 创建线框
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var sWireframe: egret3d.Wireframe = new egret3d.Wireframe();
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sWireframe.fromGeometry(s.geometry);
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// 把球的线框绑定在球 上
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s.addChild(sWireframe);
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}
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2.
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// 用顶点 创建线框
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protected createWireframeForVertex() {
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var wireframe0: egret3d.Wireframe = new egret3d.Wireframe();
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var vb0: number[] = [];
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// 添加5个顶点 依次连接 连接成一个4边形
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vb0.push(0, 100, 0, 1, 0, 0, 1);
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vb0.push(0, 100, 100, 0, 1, 0, 1);
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vb0.push(100, 100, 100, 0, 0, 1, 1);
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vb0.push(100, 100, 0, 0, 0, 1, 1);
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vb0.push(0, 100, 0, 1, 0, 0, 1);
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// 设置顶点 和 顶点格式为 坐标和颜色
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wireframe0.fromVertexs(vb0, egret3d.VertexFormat.VF_POSITION | egret3d.VertexFormat.VF_COLOR);
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this.view.addChild3D(wireframe0);
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wireframe0.x = -400;
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var wireframe1: egret3d.Wireframe = new egret3d.Wireframe();
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var vb1: number[] = [];
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// 添加8个顶点 两两相边 连接成一个4边形
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vb1.push(0, 100, 0, 1, 0, 0, 1);
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vb1.push(0, 100, 100, 0, 1, 0, 1);
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vb1.push(0, 100, 100, 0, 1, 0, 1);
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vb1.push(100, 100, 100, 0, 0, 1, 1);
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vb1.push(100, 100, 100, 0, 0, 1, 1);
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vb1.push(100, 100, 0, 0, 0, 1, 1);
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vb1.push(100, 100, 0, 0, 0, 1, 1);
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vb1.push(0, 100, 0, 1, 0, 0, 1);
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// 设置顶点 和 顶点格式为 坐标和颜色
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wireframe1.fromVertexsEx(vb1, egret3d.VertexFormat.VF_POSITION | egret3d.VertexFormat.VF_COLOR);
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this.view.addChild3D(wireframe1);
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wireframe1.x = -200;
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}
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3.
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// 用顶点和索引的方式 创建线框
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protected createWireframe() {
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// 创建一个20 * 20 行的 每个格子100 * 100 大小
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var wir: egret3d.Wireframe = new egret3d.Wireframe();
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wir.material.diffuseColor = 0x000000;
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this.view.addChild3D(wir);
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var geom: egret3d.Geometry = wir.geometry;
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var width: number = 100;
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var height: number = 100;
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var row: number = 20;
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var col: number = 20;
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var point_row: number = row + 1;
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var point_col: number = col + 1;
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var vb: Array<number> = new Array<number>();
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var ib: Array<number> = new Array<number>();
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for (var i: number = 0; i < point_row; ++i) {
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vb.push(-width * col / 2, 0, height * i - height * row / 2);
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vb.push(width * col / 2, 0, height * i - height * row / 2);
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}
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for (var i: number = 0; i < point_col; ++i) {
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vb.push(width * i - width * col / 2, 0, height * col / 2);
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vb.push(width * i - width * col / 2, 0, -height * col / 2);
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}
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for (var i: number = 0; i < vb.length / 3; ++i) {
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ib.push(i);
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}
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// 设置顶点数据
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geom.setVerticesForIndex(0, egret3d.VertexFormat.VF_POSITION, vb, vb.length / 3);
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// 设置索引数据
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geom.setVertexIndices(0, ib);
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}
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