You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
114 lines
3.1 KiB
JavaScript
114 lines
3.1 KiB
JavaScript
import BoundingSphere from "./BoundingSphere.js";
|
|
import Cartesian3 from "./Cartesian3.js";
|
|
import Check from "./Check.js";
|
|
import ComponentDatatype from "./ComponentDatatype.js";
|
|
import defined from "./defined.js";
|
|
import Geometry from "./Geometry.js";
|
|
import GeometryAttribute from "./GeometryAttribute.js";
|
|
import GeometryAttributes from "./GeometryAttributes.js";
|
|
import PrimitiveType from "./PrimitiveType.js";
|
|
|
|
/**
|
|
* Describes geometry representing the outline of a plane centered at the origin, with a unit width and length.
|
|
*
|
|
* @alias PlaneOutlineGeometry
|
|
* @constructor
|
|
*
|
|
*/
|
|
function PlaneOutlineGeometry() {
|
|
this._workerName = "createPlaneOutlineGeometry";
|
|
}
|
|
|
|
/**
|
|
* The number of elements used to pack the object into an array.
|
|
* @type {Number}
|
|
*/
|
|
PlaneOutlineGeometry.packedLength = 0;
|
|
|
|
/**
|
|
* Stores the provided instance into the provided array.
|
|
*
|
|
* @param {PlaneOutlineGeometry} value The value to pack.
|
|
* @param {Number[]} array The array to pack into.
|
|
*
|
|
* @returns {Number[]} The array that was packed into
|
|
*/
|
|
PlaneOutlineGeometry.pack = function (value, array) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.defined("value", value);
|
|
Check.defined("array", array);
|
|
//>>includeEnd('debug');
|
|
|
|
return array;
|
|
};
|
|
|
|
/**
|
|
* 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 {PlaneOutlineGeometry} [result] The object into which to store the result.
|
|
* @returns {PlaneOutlineGeometry} The modified result parameter or a new PlaneOutlineGeometry instance if one was not provided.
|
|
*/
|
|
PlaneOutlineGeometry.unpack = function (array, startingIndex, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.defined("array", array);
|
|
//>>includeEnd('debug');
|
|
|
|
if (!defined(result)) {
|
|
return new PlaneOutlineGeometry();
|
|
}
|
|
|
|
return result;
|
|
};
|
|
|
|
var min = new Cartesian3(-0.5, -0.5, 0.0);
|
|
var max = new Cartesian3(0.5, 0.5, 0.0);
|
|
|
|
/**
|
|
* Computes the geometric representation of an outline of a plane, including its vertices, indices, and a bounding sphere.
|
|
*
|
|
* @returns {Geometry|undefined} The computed vertices and indices.
|
|
*/
|
|
PlaneOutlineGeometry.createGeometry = function () {
|
|
var attributes = new GeometryAttributes();
|
|
var indices = new Uint16Array(4 * 2);
|
|
var positions = new Float64Array(4 * 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;
|
|
|
|
attributes.position = new GeometryAttribute({
|
|
componentDatatype: ComponentDatatype.DOUBLE,
|
|
componentsPerAttribute: 3,
|
|
values: positions,
|
|
});
|
|
|
|
indices[0] = 0;
|
|
indices[1] = 1;
|
|
indices[2] = 1;
|
|
indices[3] = 2;
|
|
indices[4] = 2;
|
|
indices[5] = 3;
|
|
indices[6] = 3;
|
|
indices[7] = 0;
|
|
|
|
return new Geometry({
|
|
attributes: attributes,
|
|
indices: indices,
|
|
primitiveType: PrimitiveType.LINES,
|
|
boundingSphere: new BoundingSphere(Cartesian3.ZERO, Math.sqrt(2.0)),
|
|
});
|
|
};
|
|
export default PlaneOutlineGeometry;
|