Doodle3D-Slicer/three.js-master/examples/js/wip/benchmark/PlaneGeometry.js

80 lines
2.1 KiB
JavaScript
Raw Normal View History

2015-06-12 15:58:26 +02:00
/**
* @author mrdoob / http://mrdoob.com/
* based on http://papervision3d.googlecode.com/svn/trunk/as3/trunk/src/org/papervision3d/objects/primitives/Plane.as
*/
THREE.PlaneGeometry = function ( width, height, widthSegments, heightSegments ) {
THREE.Geometry.call( this );
this.width = width;
this.height = height;
this.widthSegments = widthSegments || 1;
this.heightSegments = heightSegments || 1;
var ix, iz;
var width_half = width / 2;
var height_half = height / 2;
var gridX = this.widthSegments;
var gridZ = this.heightSegments;
var gridX1 = gridX + 1;
var gridZ1 = gridZ + 1;
var segment_width = this.width / gridX;
var segment_height = this.height / gridZ;
var normal = new THREE.Vector3( 0, 0, 1 );
for ( iz = 0; iz < gridZ1; iz ++ ) {
for ( ix = 0; ix < gridX1; ix ++ ) {
var x = ix * segment_width - width_half;
var y = iz * segment_height - height_half;
this.vertices.push( new THREE.Vector3( x, - y, 0 ) );
}
}
for ( iz = 0; iz < gridZ; iz ++ ) {
for ( ix = 0; ix < gridX; ix ++ ) {
var a = ix + gridX1 * iz;
var b = ix + gridX1 * ( iz + 1 );
var c = ( ix + 1 ) + gridX1 * ( iz + 1 );
var d = ( ix + 1 ) + gridX1 * iz;
var uva = new THREE.Vector2( ix / gridX, 1 - iz / gridZ );
var uvb = new THREE.Vector2( ix / gridX, 1 - ( iz + 1 ) / gridZ );
var uvc = new THREE.Vector2( ( ix + 1 ) / gridX, 1 - ( iz + 1 ) / gridZ );
var uvd = new THREE.Vector2( ( ix + 1 ) / gridX, 1 - iz / gridZ );
var face = new THREE.Face3( a, b, d );
face.normal.copy( normal );
face.vertexNormals.push( normal.clone(), normal.clone(), normal.clone() );
this.faces.push( face );
this.faceVertexUvs[ 0 ].push( [ uva, uvb, uvd ] );
face = new THREE.Face3( b, c, d );
face.normal.copy( normal );
face.vertexNormals.push( normal.clone(), normal.clone(), normal.clone() );
this.faces.push( face );
this.faceVertexUvs[ 0 ].push( [ uvb.clone(), uvc, uvd.clone() ] );
}
}
};
THREE.PlaneGeometry.prototype = Object.create( THREE.Geometry.prototype );
THREE.PlaneGeometry.prototype.constructor = THREE.PlaneGeometry;