Three.js Source Note (84) extras/geometries/parametricgeometry.js

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The following code is a comment for the extras/geometries/parametricgeometry.js file in the three.js source file.

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/** * @author zz85/https://github.com/zz85 * Parametric surfaces Geometry * Based on the brilliant article by @prideout HTTP://PRIDEOUT.NET/BLOG/?P=44 * * New three. Parametricgeometry (Parametricfunction, usegments, ysegements); * *//*///parametricgeometry is used to create a geometry within a three-dimensional space through the definition of the parameter func. With this object, all the collections you want, play your math talent.//////usage://var func = function ( U,V) {///var point = new three. Vector3 ();///point.x = + math.cos (u);///point.y = + Math.sin (v);///return point;///};///var geometry = new THR Ee. Parametricgeometry (func,8,8);///var material = new three. Meshbasicmaterial ({color:0x00ff00});///var param = new three. Mesh (geometry,material);////Scene.add (param); *////<summary>parametricgeometry</summary>///<param Name = "Func" type= "Funciton" > function function, must accept parameter u,v, return vector3</param>///<param name = "slices" type= "int" > The number of subdivision segments in the u direction </param>///<param name = "Stacks" type= "int" >v the number of segments in the direction of </param>three. Parametricgeometry = function (func, slices, stACKs) {three. Geometry.call (this);//Call method of the Geometry object is called, the method that originally belongs to Geometry is given to the current object parametricgeometry to use. var verts = this.vertices; var faces = This.faces;var Uvs = this.facevertexuvs[0];var i, IL, J, P;var u, v;var stackcount = stacks + 1;var Slicecou NT = slices + 1;//calculates vertex data and presses into vertices array. for (i = 0; I <= stacks; i + +) {v = i/stacks;for (j = 0; J <= Slices; j + +) {u = j/slices;p = func (U, v); Verts.push (P);}} var A, B, C, D;var UVA, UVB, UVC, uvd;//compute triangular faces, and map uv.for (i = 0; i < stacks; I + +) {for (j = 0; J < slices; J + +) {a = i * slicecount + j;b = i * slicecount + j + 1;c = (i + 1) * Slicecount + j + 1;d = (i + 1) * Slicecount + J;uva = n EW three. Vector2 (J/slices, i/stacks); UVB = new three. Vector2 ((j + 1)/slices, i/stacks), UVC = new three. Vector2 ((j + 1)/slices, (i + 1)/stacks); UVD = new three. Vector2 (J/slices, (i + 1)/stacks); Faces.push (new three. Face3 (A, B, D)); Uvs.push ([UVA, UVB, UVD]); Faces.push (new three. Face3 (b, C, d)); Uvs.push ([Uvb.clone (), UVC, Uvd.clone ()]);}} Console.log (this);//Magic bullet//var diff = this.mergevertices ();//Console.log (' Removed ', diff, ' vertices by Merg ing '); this.computefacenormals ();//Calculates the normals of the Face This.computevertexnormals ();//calculates vertex normals};/******************************* The following is a method property definition for the Parametricgeometry object, inherited from the Geometry object. ******************************************* /three. Parametricgeometry.prototype = Object.create (three. Geometry.prototype);

Commercial Territory (http://blog.csdn.net/omni360/)

This article follows "Attribution-non-commercial use-consistent" authoring public agreement

Reprint Please keep this sentence: Business Domain-this blog focuses on Agile development and mobile and IoT device research: Data visualization, Golang, HTML5, WEBGL, three. JS, Otherwise, from this blog article refused to reprint or reprint, thank you for your cooperation.

The following code is a comment for the extras/geometries/parametricgeometry.js file in the three.js source file.

More updates in: Https://github.com/omni360/three.js.sourcecode

Three.js Source Note (84) extras/geometries/parametricgeometry.js