webvr js meetup initial commit

node_modules/three/src/geometries/TorusGeometry.js

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+/**
+ * @author oosmoxiecode
+ * @author mrdoob / http://mrdoob.com/
+ * based on http://code.google.com/p/away3d/source/browse/trunk/fp10/Away3DLite/src/away3dlite/primitives/Torus.as?r=2888
+ */
+
+import { Geometry } from '../core/Geometry';
+
+function TorusGeometry( radius, tube, radialSegments, tubularSegments, arc ) {
+
+	Geometry.call( this );
+
+	this.type = 'TorusGeometry';
+
+	this.parameters = {
+		radius: radius,
+		tube: tube,
+		radialSegments: radialSegments,
+		tubularSegments: tubularSegments,
+		arc: arc
+	};
+
+	this.fromBufferGeometry( new TorusBufferGeometry( radius, tube, radialSegments, tubularSegments, arc ) );
+
+}
+
+TorusGeometry.prototype = Object.create( Geometry.prototype );
+TorusGeometry.prototype.constructor = TorusGeometry;
+
+/**
+ * @author Mugen87 / https://github.com/Mugen87
+ */
+
+import { Float32BufferAttribute } from '../core/BufferAttribute';
+import { BufferGeometry } from '../core/BufferGeometry';
+import { Vector3 } from '../math/Vector3';
+
+function TorusBufferGeometry( radius, tube, radialSegments, tubularSegments, arc ) {
+
+	BufferGeometry.call( this );
+
+	this.type = 'TorusBufferGeometry';
+
+	this.parameters = {
+		radius: radius,
+		tube: tube,
+		radialSegments: radialSegments,
+		tubularSegments: tubularSegments,
+		arc: arc
+	};
+
+	radius = radius || 100;
+	tube = tube || 40;
+	radialSegments = Math.floor( radialSegments ) || 8;
+	tubularSegments = Math.floor( tubularSegments ) || 6;
+	arc = arc || Math.PI * 2;
+
+	// buffers
+
+	var indices = [];
+	var vertices = [];
+	var normals = [];
+	var uvs = [];
+
+	// helper variables
+
+	var center = new Vector3();
+	var vertex = new Vector3();
+	var normal = new Vector3();
+
+	var j, i;
+
+	// generate vertices, normals and uvs
+
+	for ( j = 0; j <= radialSegments; j ++ ) {
+
+		for ( i = 0; i <= tubularSegments; i ++ ) {
+
+			var u = i / tubularSegments * arc;
+			var v = j / radialSegments * Math.PI * 2;
+
+			// vertex
+
+			vertex.x = ( radius + tube * Math.cos( v ) ) * Math.cos( u );
+			vertex.y = ( radius + tube * Math.cos( v ) ) * Math.sin( u );
+			vertex.z = tube * Math.sin( v );
+
+			vertices.push( vertex.x, vertex.y, vertex.z );
+
+			// normal
+
+			center.x = radius * Math.cos( u );
+			center.y = radius * Math.sin( u );
+			normal.subVectors( vertex, center ).normalize();
+
+			normals.push( normal.x, normal.y, normal.z );
+
+			// uv
+
+			uvs.push( i / tubularSegments );
+			uvs.push( j / radialSegments );
+
+		}
+
+	}
+
+	// generate indices
+
+	for ( j = 1; j <= radialSegments; j ++ ) {
+
+		for ( i = 1; i <= tubularSegments; i ++ ) {
+
+			// indices
+
+			var a = ( tubularSegments + 1 ) * j + i - 1;
+			var b = ( tubularSegments + 1 ) * ( j - 1 ) + i - 1;
+			var c = ( tubularSegments + 1 ) * ( j - 1 ) + i;
+			var d = ( tubularSegments + 1 ) * j + i;
+
+			// faces
+
+			indices.push( a, b, d );
+			indices.push( b, c, d );
+
+		}
+
+	}
+
+	// build geometry
+
+	this.setIndex( indices );
+	this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
+	this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
+	this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
+
+}
+
+TorusBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
+TorusBufferGeometry.prototype.constructor = TorusBufferGeometry;
+
+export { TorusGeometry, TorusBufferGeometry };