Three.js Source Note (82) Extras/geometries/ringgeometry.js

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

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/** * @author Kaleb Murphy *//*///ringgeometry is used to create a two-dimensional torus object within a three-dimensional space.//////usage: var geometry = new three. Ringgeometry (1,5,32);///var material = new three. Meshbasicmaterial ({color:0x00ff00});///var Ring = new three. Mesh (geometry,material);///Scene.add (Ring); *////<summary>torusgeometry</summary>///<param name = " Innerradius "type=" float "> Torus inner circle radius, default initialized to 0</param>///<param name =" Outerradius "type=" float "> Torus outer Circle radius , the default is initialized to 50</param>///<param name = "Thetasegments" type= "int" > The number of subdivision segments on the torus circumference, which represents the roundness of the ring, the lowest is 3. The default value is 8</param>///<param name = "Phisegments" type= "int" > The number of segments in the circle to the outer circle of the torus, the lowest is 1. The default value is 8</param>///<param name = "Thetastart" type= "float" > The starting angle of the torus, which is initialized by default to 0</param>///<param name = "Thetalength" type= "float" > Torus circumference arc length, default initialized to Math.PI * 2</param>three. Ringgeometry = function (Innerradius, Outerradius, Thetasegments, Phisegments, Thetastart, thetalength) {THREE. Geometry.call (this);//Call method that calls the Geometry object, the method that originally belongs to GeometryGiven to the current object ringgeometry to use. Innerradius = Innerradius | | 0;//Circle radius within the torus, default initialized to 0outerRadius = Outerradius | | 50;//Circle radius, default initialized to 50thetaStart = Thetastart!== undefined? thetastart:0;//the starting angle of the torus, by default initialized to 0thetaLength = Thetalength!== undefined? ThetaLength:Math.PI * 2;//Circular arc length, default initialized to Math.PI * 2thetaSegments = thetasegments!== undefined? Math.max (3, thetasegments): The number of subdivision segments on the circumference of the 8;//torus, representing the roundness of the ring, the lowest is 3. The default value is 8phiSegments = phisegments!== undefined? Math.max (1, phisegments): The number of subdivision segments in the circle to the outer circle of the 8;//torus, the lowest is 1. The default value is 8var I, O, Uvs = [], radius = Innerradius, Radiusstep = ((Outerradius-innerradius)/phisegments);//compute vertex data, press into Ver  Tices Array. for (i = 0; i < phisegments + 1; i + +) {//Concentric circles inside ringfor (o = 0; o < thetasegments + 1; O + +) {//number of segments per circle circumference, var vertex = new three. Vector3 (); var segment = Thetastart + o/thetasegments * thetalength;vertex.x = Radius * Math.Cos (segment); vertex.y = RA Dius * Math.sin (segment); This.vertices.push (vertex); uVs.push (new three. Vector2 ((Vertex.x/outerradius + 1)/2, (Vertex.y/outerradius + 1)/2));} Radius + = Radiusstep;} var n = new three. Vector3 (0, 0, 1);//compute triangular face, and map uv.for (i = 0; i < phisegments; i + +) {//Concentric circles inside Ringvar thetasegm ent = i * (thetasegments + 1); for (o = 0; o < thetasegments; O + +) {//number of segments per circle circle of segments Var seg ment = o + Thetasegment;var v1 = Segment;var v2 = segment + thetasegments + 1;var v3 = segment + thetasegments + 2;THIS.FA Ces.push (new three. Face3 (v1, v2, v3, [N.clone (), N.clone (), N.clone ()])); this.facevertexuvs[0].push ([uvs[v1].clone (), uvs[v2].cl One (), uvs[v3].clone ()), V1 = SEGMENT;V2 = segment + thetasegments + 2;v3 = segment + 1;this.faces.push (new three. Face3 (v1, v2, v3, [N.clone (), N.clone (), N.clone ()])); this.facevertexuvs[0].push ([uvs[v1].clone (), uvs[v2].cl One (), uvs[v3].clone ()]);}} This.computefacenormals ();//Calculates the face's normal this.boundingsphere = new three. Sphere (NewThree. Vector3 (), RADIUS);//Calculate sphere boundary};/***************************************************** The following is the method property definition for the Ringgeometry object, Inherits from the Geometry object. **************************************************/three. Ringgeometry.prototype = Object.create (three. Geometry.prototype);

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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/ringgeometry.js file in the three.js source file.

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

Three.js Source Note (82) Extras/geometries/ringgeometry.js