Doodle3D-Slicer/three.js-master/examples/js/wip/benchmark/BoxGeometry2.js
2017-06-22 13:21:07 +02:00

115 lines
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JavaScript
Executable File

/**
* @author mrdoob / http://mrdoob.com/
* based on http://papervision3d.googlecode.com/svn/trunk/as3/trunk/src/org/papervision3d/objects/primitives/Cube.as
*/
THREE.BoxGeometry2 = function ( width, height, depth, widthSegments, heightSegments, depthSegments ) {
var scope = this;
this.width = width;
this.height = height;
this.depth = depth;
this.widthSegments = widthSegments || 1;
this.heightSegments = heightSegments || 1;
this.depthSegments = depthSegments || 1;
var width_half = this.width / 2;
var height_half = this.height / 2;
var depth_half = this.depth / 2;
var vector = new THREE.Vector3();
var vectors = [];
var vertices = [];
var addVertex = function ( a, b, c ) {
vertices.push( vectors[ a ], vectors[ a + 1 ], vectors[ a + 2 ] );
vertices.push( vectors[ b ], vectors[ b + 1 ], vectors[ b + 2 ] );
vertices.push( vectors[ c ], vectors[ c + 1 ], vectors[ c + 2 ] );
};
buildPlane( 'z', 'y', - 1, - 1, this.depth, this.height, width_half, 0 ); // px
buildPlane( 'z', 'y', 1, - 1, this.depth, this.height, - width_half, 1 ); // nx
buildPlane( 'x', 'z', 1, 1, this.width, this.depth, height_half, 2 ); // py
buildPlane( 'x', 'z', 1, - 1, this.width, this.depth, - height_half, 3 ); // ny
buildPlane( 'x', 'y', 1, - 1, this.width, this.height, depth_half, 4 ); // pz
buildPlane( 'x', 'y', - 1, - 1, this.width, this.height, - depth_half, 5 ); // nz
function buildPlane( u, v, udir, vdir, width, height, depth, materialIndex ) {
var w, ix, iy,
gridX = scope.widthSegments,
gridY = scope.heightSegments,
width_half = width / 2,
height_half = height / 2,
offset = vectors.length;
if ( ( u === 'x' && v === 'y' ) || ( u === 'y' && v === 'x' ) ) {
w = 'z';
} else if ( ( u === 'x' && v === 'z' ) || ( u === 'z' && v === 'x' ) ) {
w = 'y';
gridY = scope.depthSegments;
} else if ( ( u === 'z' && v === 'y' ) || ( u === 'y' && v === 'z' ) ) {
w = 'x';
gridX = scope.depthSegments;
}
var gridX1 = gridX + 1,
gridY1 = gridY + 1,
segment_width = width / gridX,
segment_height = height / gridY,
normal = new THREE.Vector3();
normal[ w ] = depth > 0 ? 1 : - 1;
for ( iy = 0; iy < gridY1; iy ++ ) {
for ( ix = 0; ix < gridX1; ix ++ ) {
vector[ u ] = ( ix * segment_width - width_half ) * udir;
vector[ v ] = ( iy * segment_height - height_half ) * vdir;
vector[ w ] = depth;
vectors.push( vector.x, vector.y, vector.z );
}
}
for ( iy = 0; iy < gridY; iy ++ ) {
for ( ix = 0; ix < gridX; ix ++ ) {
var a = ix + gridX1 * iy;
var b = ix + gridX1 * ( iy + 1 );
var c = ( ix + 1 ) + gridX1 * ( iy + 1 );
var d = ( ix + 1 ) + gridX1 * iy;
addVertex( a * 3 + offset, b * 3 + offset, d * 3 + offset );
addVertex( b * 3 + offset, c * 3 + offset, d * 3 + offset );
}
}
}
THREE.Geometry2.call( this, vertices.length / 3 );
this.vertices.set( vertices );
};
THREE.BoxGeometry2.prototype = Object.create( THREE.Geometry2.prototype );
THREE.BoxGeometry2.prototype.constructor = THREE.BoxGeometry2;