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Versions: 5
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Stored size: 1.86 KB
Contents
/*global define*/
define([
'../Core/defaultValue',
'../Core/DeveloperError',
'../Core/Intersect'
], function(
defaultValue,
DeveloperError,
Intersect) {
"use strict";
/**
* The culling volume defined by planes.
*
* @alias OrthographicFrustum
* @constructor
*
* @param Array planes An array of clipping planes.
*/
var CullingVolume = function(planes) {
/**
* Each plane is represented by a Cartesian4 object, where the x, y, and z components
* define the unit vector normal to the plane, and the w component is the distance of the
* plane from the origin.
* @type {Array}
*/
this.planes = defaultValue(planes, []);
};
/**
* Determines whether a bounding volume intersects the culling volume.
* @memberof CullingVolume
*
* @param {Object} boundingVolume The bounding volume whose intersection with the culling volume is to be tested.
* @return {Intersect} Intersect.OUTSIDE, Intersect.INTERSECTING, or Intersect.INSIDE.
*
* @exception {DeveloperError} boundingVolume is required.
*/
CullingVolume.prototype.getVisibility = function(boundingVolume) {
if (typeof boundingVolume === 'undefined') {
throw new DeveloperError('boundingVolume is required.');
}
var planes = this.planes;
var intersecting = false;
for (var k = 0, len = planes.length; k < len; ++k) {
var result = boundingVolume.intersect(planes[k]);
if (result === Intersect.OUTSIDE) {
return Intersect.OUTSIDE;
} else if (result === Intersect.INTERSECTING) {
intersecting = true;
}
}
return intersecting ? Intersect.INTERSECTING : Intersect.INSIDE;
};
return CullingVolume;
});
Version data entries
5 entries across 5 versions & 1 rubygems