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@@ -0,0 +1,45 @@
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+/**
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+ * @author astrodud / http://astrodud.isgreat.org/
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+ */
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+
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+function LathedObject( verts, nsteps, latheAngle ) {
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+ THREE.Geometry.call( this );
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+ nsteps = nsteps || 12;
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+ latheAngle = latheAngle || 2 * Math.PI;
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+ var stepSize = latheAngle / nsteps;
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+ var newV = [], oldInds = [], newInds = [], startInds = [];
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+ for ( var j = 0; j < verts.length; j ++ ) {
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+ this.vertices.push( new THREE.Vertex( verts[ j ] ) );
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+ oldInds[ j ] = this.vertices.length - 1;
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+ newV[ j ] = new THREE.Vector3( verts[ j ].x, verts[ j ].y, verts[ j ].z );
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+ }
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+ var m = THREE.Matrix4.rotationZMatrix( stepSize );
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+ for ( var r = 0; r <= latheAngle + 0.001; r += stepSize ) { // need the +0.001 to it go up to latheAngle
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+ for ( var j = 0; j < newV.length; j ++ ) {
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+ if ( r < latheAngle ) {
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+ newV[ j ] = transformVector3( newV[ j ], m );
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+ this.vertices.push( new THREE.Vertex( newV[ j ] ) );
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+ newInds[ j ] = this.vertices.length - 1;
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+ } else {
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+ newInds = startInds; // wrap it up!
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+ }
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+ }
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+ if ( r == 0 ) startInds = oldInds;
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+ for ( var j = 0; j < oldInds.length - 1; j ++ ) {
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+ this.faces.push( new THREE.Face4( newInds[ j ], newInds[ j + 1 ], oldInds[ j + 1 ], oldInds[ j ] ) );
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+ this.uvs.push( [ new THREE.UV( r / latheAngle, j / verts.length ),
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+ new THREE.UV( r / latheAngle, ( j + 1 ) / verts.length ),
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+ new THREE.UV( ( r - stepSize ) / latheAngle, ( j + 1 ) / verts.length ),
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+ new THREE.UV( ( r - stepSize ) / latheAngle, j / verts.length ) ] );
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+ }
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+ oldInds = newInds;
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+ newInds = [];
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+ }
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+ this.computeCentroids();
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+ this.computeFaceNormals();
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+ this.computeVertexNormals();
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+ this.sortFacesByMaterial();
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+};
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+
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+LathedObject.prototype = new THREE.Geometry();
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+LathedObject.prototype.constructor = LathedObject;
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alteredq