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https://github.com/Doodle3D/Doodle3D-Slicer.git
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77 lines
1.8 KiB
JavaScript
Executable File
77 lines
1.8 KiB
JavaScript
Executable File
/**
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* @author mrdoob / http://mrdoob.com/
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* based on http://papervision3d.googlecode.com/svn/trunk/as3/trunk/src/org/papervision3d/objects/primitives/Plane.as
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*/
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THREE.PlaneGeometry2 = function ( width, height, widthSegments, heightSegments ) {
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THREE.Geometry2.call( this, ( widthSegments * heightSegments ) * 2 * 3 );
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var vertices = this.vertices.array;
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var normals = this.normals.array;
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var uvs = this.uvs.array;
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this.width = width;
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this.height = height;
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this.widthSegments = widthSegments || 1;
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this.heightSegments = heightSegments || 1;
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var widthHalf = width / 2;
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var heightHalf = height / 2;
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var gridX = this.widthSegments;
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var gridY = this.heightSegments;
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var segmentWidth = this.width / gridX;
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var segmentHeight = this.height / gridY;
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var offset = 0;
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for ( var iy = 0; iy < gridY; iy ++ ) {
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var y1 = iy * segmentHeight - heightHalf;
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var y2 = ( iy + 1 ) * segmentHeight - heightHalf;
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for ( var ix = 0; ix < gridX; ix ++ ) {
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var x1 = ix * segmentWidth - widthHalf;
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var x2 = ( ix + 1 ) * segmentWidth - widthHalf;
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vertices[ offset + 0 ] = x1;
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vertices[ offset + 1 ] = y1;
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vertices[ offset + 3 ] = x2;
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vertices[ offset + 4 ] = y1;
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vertices[ offset + 6 ] = x1;
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vertices[ offset + 7 ] = y2;
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normals[ offset + 2 ] = 1;
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normals[ offset + 5 ] = 1;
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normals[ offset + 8 ] = 1;
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vertices[ offset + 9 ] = x2;
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vertices[ offset + 10 ] = y1;
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vertices[ offset + 12 ] = x2;
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vertices[ offset + 13 ] = y2;
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vertices[ offset + 15 ] = x1;
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vertices[ offset + 16 ] = y2;
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normals[ offset + 11 ] = 1;
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normals[ offset + 13 ] = 1;
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normals[ offset + 17 ] = 1;
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offset += 18;
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}
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}
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};
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THREE.PlaneGeometry2.prototype = Object.create( THREE.Geometry2.prototype );
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THREE.PlaneGeometry2.prototype.constructor = THREE.PlaneGeometry2;
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