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import Cartesian3 from "./Cartesian3.js";
import Check from "./Check.js";
import ComponentDatatype from "./ComponentDatatype.js";
import Frozen from "./Frozen.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";
import VertexFormat from "./VertexFormat.js";
/**
* Describes geometry representing a plane centered at the origin, with a unit width and length.
*
* @alias PlaneGeometry
* @constructor
*
* @param {object} [options] Object with the following properties:
* @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
*
* @example
* const planeGeometry = new Cesium.PlaneGeometry({
* vertexFormat : Cesium.VertexFormat.POSITION_ONLY
* });
*/
function PlaneGeometry(options) {
options = options ?? Frozen.EMPTY_OBJECT;
const vertexFormat = options.vertexFormat ?? VertexFormat.DEFAULT;
this._vertexFormat = vertexFormat;
this._workerName = "createPlaneGeometry";
}
/**
* The number of elements used to pack the object into an array.
* @type {number}
*/
PlaneGeometry.packedLength = VertexFormat.packedLength;
/**
* Stores the provided instance into the provided array.
*
* @param {PlaneGeometry} 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.
*
* @returns {number[]} The array that was packed into
*/
PlaneGeometry.pack = function (value, array, startingIndex) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.object("value", value);
Check.defined("array", array);
//>>includeEnd('debug');
startingIndex = startingIndex ?? 0;
VertexFormat.pack(value._vertexFormat, array, startingIndex);
return array;
};
const scratchVertexFormat = new VertexFormat();
const scratchOptions = {
vertexFormat: scratchVertexFormat,
};
/**
* 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 {PlaneGeometry} [result] The object into which to store the result.
* @returns {PlaneGeometry} The modified result parameter or a new PlaneGeometry instance if one was not provided.
*/
PlaneGeometry.unpack = function (array, startingIndex, result) {
//>>includeStart('debug', pragmas.debug);
Check.defined("array", array);
//>>includeEnd('debug');
startingIndex = startingIndex ?? 0;
const vertexFormat = VertexFormat.unpack(
array,
startingIndex,
scratchVertexFormat,
);
Eif (!defined(result)) {
return new PlaneGeometry(scratchOptions);
}
result._vertexFormat = VertexFormat.clone(vertexFormat, result._vertexFormat);
return result;
};
const min = new Cartesian3(-0.5, -0.5, 0.0);
const max = new Cartesian3(0.5, 0.5, 0.0);
/**
* Computes the geometric representation of a plane, including its vertices, indices, and a bounding sphere.
*
* @param {PlaneGeometry} planeGeometry A description of the plane.
* @returns {Geometry|undefined} The computed vertices and indices.
*/
PlaneGeometry.createGeometry = function (planeGeometry) {
const vertexFormat = planeGeometry._vertexFormat;
const attributes = new GeometryAttributes();
let indices;
let positions;
Eif (vertexFormat.position) {
// 4 corner points. Duplicated 3 times each for each incident edge/face.
positions = new Float64Array(4 * 3);
// +z face
positions[0] = min.x;
positions[1] = min.y;
positions[2] = 0.0;
positions[3] = max.x;
positions[4] = min.y;
positions[5] = 0.0;
positions[6] = max.x;
positions[7] = max.y;
positions[8] = 0.0;
positions[9] = min.x;
positions[10] = max.y;
positions[11] = 0.0;
attributes.position = new GeometryAttribute({
componentDatatype: ComponentDatatype.DOUBLE,
componentsPerAttribute: 3,
values: positions,
});
if (vertexFormat.normal) {
const normals = new Float32Array(4 * 3);
// +z face
normals[0] = 0.0;
normals[1] = 0.0;
normals[2] = 1.0;
normals[3] = 0.0;
normals[4] = 0.0;
normals[5] = 1.0;
normals[6] = 0.0;
normals[7] = 0.0;
normals[8] = 1.0;
normals[9] = 0.0;
normals[10] = 0.0;
normals[11] = 1.0;
attributes.normal = new GeometryAttribute({
componentDatatype: ComponentDatatype.FLOAT,
componentsPerAttribute: 3,
values: normals,
});
}
if (vertexFormat.st) {
const texCoords = new Float32Array(4 * 2);
// +z face
texCoords[0] = 0.0;
texCoords[1] = 0.0;
texCoords[2] = 1.0;
texCoords[3] = 0.0;
texCoords[4] = 1.0;
texCoords[5] = 1.0;
texCoords[6] = 0.0;
texCoords[7] = 1.0;
attributes.st = new GeometryAttribute({
componentDatatype: ComponentDatatype.FLOAT,
componentsPerAttribute: 2,
values: texCoords,
});
}
if (vertexFormat.tangent) {
const tangents = new Float32Array(4 * 3);
// +z face
tangents[0] = 1.0;
tangents[1] = 0.0;
tangents[2] = 0.0;
tangents[3] = 1.0;
tangents[4] = 0.0;
tangents[5] = 0.0;
tangents[6] = 1.0;
tangents[7] = 0.0;
tangents[8] = 0.0;
tangents[9] = 1.0;
tangents[10] = 0.0;
tangents[11] = 0.0;
attributes.tangent = new GeometryAttribute({
componentDatatype: ComponentDatatype.FLOAT,
componentsPerAttribute: 3,
values: tangents,
});
}
if (vertexFormat.bitangent) {
const bitangents = new Float32Array(4 * 3);
// +z face
bitangents[0] = 0.0;
bitangents[1] = 1.0;
bitangents[2] = 0.0;
bitangents[3] = 0.0;
bitangents[4] = 1.0;
bitangents[5] = 0.0;
bitangents[6] = 0.0;
bitangents[7] = 1.0;
bitangents[8] = 0.0;
bitangents[9] = 0.0;
bitangents[10] = 1.0;
bitangents[11] = 0.0;
attributes.bitangent = new GeometryAttribute({
componentDatatype: ComponentDatatype.FLOAT,
componentsPerAttribute: 3,
values: bitangents,
});
}
// 2 triangles
indices = new Uint16Array(2 * 3);
// +z face
indices[0] = 0;
indices[1] = 1;
indices[2] = 2;
indices[3] = 0;
indices[4] = 2;
indices[5] = 3;
}
return new Geometry({
attributes: attributes,
indices: indices,
primitiveType: PrimitiveType.TRIANGLES,
boundingSphere: new BoundingSphere(Cartesian3.ZERO, Math.sqrt(2.0)),
});
};
export default PlaneGeometry;
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