/
BoxOutlineGeometry.js
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/
BoxOutlineGeometry.js
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/*global define*/
define([
'./BoundingSphere',
'./Cartesian3',
'./ComponentDatatype',
'./defaultValue',
'./defined',
'./deprecationWarning',
'./DeveloperError',
'./Geometry',
'./GeometryAttribute',
'./GeometryAttributes',
'./PrimitiveType'
], function(
BoundingSphere,
Cartesian3,
ComponentDatatype,
defaultValue,
defined,
deprecationWarning,
DeveloperError,
Geometry,
GeometryAttribute,
GeometryAttributes,
PrimitiveType) {
"use strict";
var diffScratch = new Cartesian3();
/**
* A description of the outline of a cube centered at the origin.
*
* @alias BoxOutlineGeometry
* @constructor
*
* @param {Object} options Object with the following properties:
* @param {Cartesian3} options.minimum The minimum x, y, and z coordinates of the box.
* @param {Cartesian3} options.maximum The maximum x, y, and z coordinates of the box.
*
* @see BoxOutlineGeometry.fromDimensions
* @see BoxOutlineGeometry.createGeometry
* @see Packable
*
* @demo {@link http://cesiumjs.org/Cesium/Apps/Sandcastle/index.html?src=Box%20Outline.html|Cesium Sandcastle Box Outline Demo}
*
* @example
* var box = new Cesium.BoxOutlineGeometry({
* maximum : new Cesium.Cartesian3(250000.0, 250000.0, 250000.0),
* minimum : new Cesium.Cartesian3(-250000.0, -250000.0, -250000.0)
* });
* var geometry = Cesium.BoxOutlineGeometry.createGeometry(box);
*/
var BoxOutlineGeometry = function(options) {
options = defaultValue(options, defaultValue.EMPTY_OBJECT);
var min = options.minimum;
var max = options.maximum;
if (!defined(min) && defined(options.minimumCorner)) {
min = options.minimumCorner;
deprecationWarning('BoxOutlineGeometry', 'options.minimumCorner is deprecated. Use options.minimum instead.');
}
if (!defined(max) && defined(options.maximumCorner)) {
max = options.maximumCorner;
deprecationWarning('BoxOutlineGeometry', 'options.maximumCorner is deprecated. Use options.maximum instead.');
}
//>>includeStart('debug', pragmas.debug);
if (!defined(min)) {
throw new DeveloperError('options.minimum is required.');
}
if (!defined(max)) {
throw new DeveloperError('options.maximum is required');
}
//>>includeEnd('debug');
this._min = Cartesian3.clone(min);
this._max = Cartesian3.clone(max);
this._workerName = 'createBoxOutlineGeometry';
};
/**
* Creates an outline of a cube centered at the origin given its dimensions.
*
* @param {Object} options Object with the following properties:
* @param {Cartesian3} options.dimensions The width, depth, and height of the box stored in the x, y, and z coordinates of the <code>Cartesian3</code>, respectively.
* @returns {BoxOutlineGeometry}
*
* @exception {DeveloperError} All dimensions components must be greater than or equal to zero.
*
* @see BoxOutlineGeometry.createGeometry
*
* @example
* var box = Cesium.BoxOutlineGeometry.fromDimensions({
* dimensions : new Cesium.Cartesian3(500000.0, 500000.0, 500000.0)
* });
* var geometry = Cesium.BoxOutlineGeometry.createGeometry(box);
*/
BoxOutlineGeometry.fromDimensions = function(options) {
options = defaultValue(options, defaultValue.EMPTY_OBJECT);
var dimensions = options.dimensions;
//>>includeStart('debug', pragmas.debug);
if (!defined(dimensions)) {
throw new DeveloperError('options.dimensions is required.');
}
if (dimensions.x < 0 || dimensions.y < 0 || dimensions.z < 0) {
throw new DeveloperError('All dimensions components must be greater than or equal to zero.');
}
//>>includeEnd('debug');
var corner = Cartesian3.multiplyByScalar(dimensions, 0.5, new Cartesian3());
return new BoxOutlineGeometry({
minimum : Cartesian3.negate(corner, new Cartesian3()),
maximum : corner
});
};
/**
* Creates an outline of a cube from the dimensions of an AxisAlignedBoundingBox.
*
* @param {AxisAlignedBoundingBox} boundingBox A description of the AxisAlignedBoundingBox.
* @returns {BoxOutlineGeometry}
*
* @exception {DeveloperError} AxisAlignedBoundingBox must be defined.
*
* @see BoxOutlineGeometry.createGeometry
*
* @example
* var aabb = Cesium.AxisAlignedBoundingBox.fromPoints(Cesium.Cartesian3.fromDegreesArray([
* -72.0, 40.0,
* -70.0, 35.0,
* -75.0, 30.0,
* -70.0, 30.0,
* -68.0, 40.0
* ]));
* var box = Cesium.BoxOutlineGeometry.fromAxisAlignedBoundingBox(aabb);
*/
BoxOutlineGeometry.fromAxisAlignedBoundingBox = function(boundingBox) {
if (!defined(boundingBox)) {
throw new DeveloperError('boundingBox is required.');
}
return new BoxOutlineGeometry({
minimum : boundingBox.minimum,
maximum : boundingBox.maximum
});
};
/**
* The number of elements used to pack the object into an array.
* @type {Number}
*/
BoxOutlineGeometry.packedLength = 2 * Cartesian3.packedLength;
/**
* Stores the provided instance into the provided array.
* @function
*
* @param {BoxOutlineGeometry} value The value to pack.
* @param {Number[]} array The array to pack into.
* @param {Number} [startingIndex=0] The index into the array at which to start packing the elements.
*/
BoxOutlineGeometry.pack = function(value, array, startingIndex) {
//>>includeStart('debug', pragmas.debug);
if (!defined(value)) {
throw new DeveloperError('value is required');
}
if (!defined(array)) {
throw new DeveloperError('array is required');
}
//>>includeEnd('debug');
startingIndex = defaultValue(startingIndex, 0);
Cartesian3.pack(value._min, array, startingIndex);
Cartesian3.pack(value._max, array, startingIndex + Cartesian3.packedLength);
};
var scratchMin = new Cartesian3();
var scratchMax = new Cartesian3();
var scratchOptions = {
minimum : scratchMin,
maximum : scratchMax
};
/**
* Retrieves an instance from a packed array.
*
* @param {Number[]} array The packed array.
* @param {Number} [startingIndex=0] The starting index of the element to be unpacked.
* @param {BoxOutlineGeometry} [result] The object into which to store the result.
* @returns {BoxOutlineGeometry} The modified result parameter or a new BoxOutlineGeometry instance if one was not provided.
*/
BoxOutlineGeometry.unpack = function(array, startingIndex, result) {
//>>includeStart('debug', pragmas.debug);
if (!defined(array)) {
throw new DeveloperError('array is required');
}
//>>includeEnd('debug');
startingIndex = defaultValue(startingIndex, 0);
var min = Cartesian3.unpack(array, startingIndex, scratchMin);
var max = Cartesian3.unpack(array, startingIndex + Cartesian3.packedLength, scratchMax);
if (!defined(result)) {
return new BoxOutlineGeometry(scratchOptions);
}
result._min = Cartesian3.clone(min, result._min);
result._max = Cartesian3.clone(max, result._max);
return result;
};
/**
* Computes the geometric representation of an outline of a box, including its vertices, indices, and a bounding sphere.
*
* @param {BoxOutlineGeometry} boxGeometry A description of the box outline.
* @returns {Geometry} The computed vertices and indices.
*/
BoxOutlineGeometry.createGeometry = function(boxGeometry) {
var min = boxGeometry._min;
var max = boxGeometry._max;
var attributes = new GeometryAttributes();
var indices = new Uint16Array(12 * 2);
var positions = new Float64Array(8 * 3);
positions[0] = min.x;
positions[1] = min.y;
positions[2] = min.z;
positions[3] = max.x;
positions[4] = min.y;
positions[5] = min.z;
positions[6] = max.x;
positions[7] = max.y;
positions[8] = min.z;
positions[9] = min.x;
positions[10] = max.y;
positions[11] = min.z;
positions[12] = min.x;
positions[13] = min.y;
positions[14] = max.z;
positions[15] = max.x;
positions[16] = min.y;
positions[17] = max.z;
positions[18] = max.x;
positions[19] = max.y;
positions[20] = max.z;
positions[21] = min.x;
positions[22] = max.y;
positions[23] = max.z;
attributes.position = new GeometryAttribute({
componentDatatype : ComponentDatatype.DOUBLE,
componentsPerAttribute : 3,
values : positions
});
// top
indices[0] = 4;
indices[1] = 5;
indices[2] = 5;
indices[3] = 6;
indices[4] = 6;
indices[5] = 7;
indices[6] = 7;
indices[7] = 4;
// bottom
indices[8] = 0;
indices[9] = 1;
indices[10] = 1;
indices[11] = 2;
indices[12] = 2;
indices[13] = 3;
indices[14] = 3;
indices[15] = 0;
// left
indices[16] = 0;
indices[17] = 4;
indices[18] = 1;
indices[19] = 5;
//right
indices[20] = 2;
indices[21] = 6;
indices[22] = 3;
indices[23] = 7;
var diff = Cartesian3.subtract(max, min, diffScratch);
var radius = Cartesian3.magnitude(diff) * 0.5;
return new Geometry({
attributes : attributes,
indices : indices,
primitiveType : PrimitiveType.LINES,
boundingSphere : new BoundingSphere(Cartesian3.ZERO, radius)
});
};
return BoxOutlineGeometry;
});