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- import arrayFill from "./arrayFill.js";
- import BoundingSphere from "./BoundingSphere.js";
- import Cartesian2 from "./Cartesian2.js";
- import Cartesian3 from "./Cartesian3.js";
- import ComponentDatatype from "./ComponentDatatype.js";
- import CylinderGeometryLibrary from "./CylinderGeometryLibrary.js";
- import defaultValue from "./defaultValue.js";
- import defined from "./defined.js";
- import DeveloperError from "./DeveloperError.js";
- import Geometry from "./Geometry.js";
- import GeometryAttribute from "./GeometryAttribute.js";
- import GeometryAttributes from "./GeometryAttributes.js";
- import GeometryOffsetAttribute from "./GeometryOffsetAttribute.js";
- import IndexDatatype from "./IndexDatatype.js";
- import CesiumMath from "./Math.js";
- import PrimitiveType from "./PrimitiveType.js";
- import VertexFormat from "./VertexFormat.js";
- var radiusScratch = new Cartesian2();
- var normalScratch = new Cartesian3();
- var bitangentScratch = new Cartesian3();
- var tangentScratch = new Cartesian3();
- var positionScratch = new Cartesian3();
- function CylinderGeometry(options) {
- options = defaultValue(options, defaultValue.EMPTY_OBJECT);
- var length = options.length;
- var topRadius = options.topRadius;
- var bottomRadius = options.bottomRadius;
- var vertexFormat = defaultValue(options.vertexFormat, VertexFormat.DEFAULT);
- var slices = defaultValue(options.slices, 128);
-
- if (!defined(length)) {
- throw new DeveloperError("options.length must be defined.");
- }
- if (!defined(topRadius)) {
- throw new DeveloperError("options.topRadius must be defined.");
- }
- if (!defined(bottomRadius)) {
- throw new DeveloperError("options.bottomRadius must be defined.");
- }
- if (slices < 3) {
- throw new DeveloperError(
- "options.slices must be greater than or equal to 3."
- );
- }
- if (
- defined(options.offsetAttribute) &&
- options.offsetAttribute === GeometryOffsetAttribute.TOP
- ) {
- throw new DeveloperError(
- "GeometryOffsetAttribute.TOP is not a supported options.offsetAttribute for this geometry."
- );
- }
-
- this._length = length;
- this._topRadius = topRadius;
- this._bottomRadius = bottomRadius;
- this._vertexFormat = VertexFormat.clone(vertexFormat);
- this._slices = slices;
- this._offsetAttribute = options.offsetAttribute;
- this._workerName = "createCylinderGeometry";
- }
- CylinderGeometry.packedLength = VertexFormat.packedLength + 5;
- CylinderGeometry.pack = function (value, array, startingIndex) {
-
- if (!defined(value)) {
- throw new DeveloperError("value is required");
- }
- if (!defined(array)) {
- throw new DeveloperError("array is required");
- }
-
- startingIndex = defaultValue(startingIndex, 0);
- VertexFormat.pack(value._vertexFormat, array, startingIndex);
- startingIndex += VertexFormat.packedLength;
- array[startingIndex++] = value._length;
- array[startingIndex++] = value._topRadius;
- array[startingIndex++] = value._bottomRadius;
- array[startingIndex++] = value._slices;
- array[startingIndex] = defaultValue(value._offsetAttribute, -1);
- return array;
- };
- var scratchVertexFormat = new VertexFormat();
- var scratchOptions = {
- vertexFormat: scratchVertexFormat,
- length: undefined,
- topRadius: undefined,
- bottomRadius: undefined,
- slices: undefined,
- offsetAttribute: undefined,
- };
- CylinderGeometry.unpack = function (array, startingIndex, result) {
-
- if (!defined(array)) {
- throw new DeveloperError("array is required");
- }
-
- startingIndex = defaultValue(startingIndex, 0);
- var vertexFormat = VertexFormat.unpack(
- array,
- startingIndex,
- scratchVertexFormat
- );
- startingIndex += VertexFormat.packedLength;
- var length = array[startingIndex++];
- var topRadius = array[startingIndex++];
- var bottomRadius = array[startingIndex++];
- var slices = array[startingIndex++];
- var offsetAttribute = array[startingIndex];
- if (!defined(result)) {
- scratchOptions.length = length;
- scratchOptions.topRadius = topRadius;
- scratchOptions.bottomRadius = bottomRadius;
- scratchOptions.slices = slices;
- scratchOptions.offsetAttribute =
- offsetAttribute === -1 ? undefined : offsetAttribute;
- return new CylinderGeometry(scratchOptions);
- }
- result._vertexFormat = VertexFormat.clone(vertexFormat, result._vertexFormat);
- result._length = length;
- result._topRadius = topRadius;
- result._bottomRadius = bottomRadius;
- result._slices = slices;
- result._offsetAttribute =
- offsetAttribute === -1 ? undefined : offsetAttribute;
- return result;
- };
- CylinderGeometry.createGeometry = function (cylinderGeometry) {
- var length = cylinderGeometry._length;
- var topRadius = cylinderGeometry._topRadius;
- var bottomRadius = cylinderGeometry._bottomRadius;
- var vertexFormat = cylinderGeometry._vertexFormat;
- var slices = cylinderGeometry._slices;
- if (
- length <= 0 ||
- topRadius < 0 ||
- bottomRadius < 0 ||
- (topRadius === 0 && bottomRadius === 0)
- ) {
- return;
- }
- var twoSlices = slices + slices;
- var threeSlices = slices + twoSlices;
- var numVertices = twoSlices + twoSlices;
- var positions = CylinderGeometryLibrary.computePositions(
- length,
- topRadius,
- bottomRadius,
- slices,
- true
- );
- var st = vertexFormat.st ? new Float32Array(numVertices * 2) : undefined;
- var normals = vertexFormat.normal
- ? new Float32Array(numVertices * 3)
- : undefined;
- var tangents = vertexFormat.tangent
- ? new Float32Array(numVertices * 3)
- : undefined;
- var bitangents = vertexFormat.bitangent
- ? new Float32Array(numVertices * 3)
- : undefined;
- var i;
- var computeNormal =
- vertexFormat.normal || vertexFormat.tangent || vertexFormat.bitangent;
- if (computeNormal) {
- var computeTangent = vertexFormat.tangent || vertexFormat.bitangent;
- var normalIndex = 0;
- var tangentIndex = 0;
- var bitangentIndex = 0;
- var theta = Math.atan2(bottomRadius - topRadius, length);
- var normal = normalScratch;
- normal.z = Math.sin(theta);
- var normalScale = Math.cos(theta);
- var tangent = tangentScratch;
- var bitangent = bitangentScratch;
- for (i = 0; i < slices; i++) {
- var angle = (i / slices) * CesiumMath.TWO_PI;
- var x = normalScale * Math.cos(angle);
- var y = normalScale * Math.sin(angle);
- if (computeNormal) {
- normal.x = x;
- normal.y = y;
- if (computeTangent) {
- tangent = Cartesian3.normalize(
- Cartesian3.cross(Cartesian3.UNIT_Z, normal, tangent),
- tangent
- );
- }
- if (vertexFormat.normal) {
- normals[normalIndex++] = normal.x;
- normals[normalIndex++] = normal.y;
- normals[normalIndex++] = normal.z;
- normals[normalIndex++] = normal.x;
- normals[normalIndex++] = normal.y;
- normals[normalIndex++] = normal.z;
- }
- if (vertexFormat.tangent) {
- tangents[tangentIndex++] = tangent.x;
- tangents[tangentIndex++] = tangent.y;
- tangents[tangentIndex++] = tangent.z;
- tangents[tangentIndex++] = tangent.x;
- tangents[tangentIndex++] = tangent.y;
- tangents[tangentIndex++] = tangent.z;
- }
- if (vertexFormat.bitangent) {
- bitangent = Cartesian3.normalize(
- Cartesian3.cross(normal, tangent, bitangent),
- bitangent
- );
- bitangents[bitangentIndex++] = bitangent.x;
- bitangents[bitangentIndex++] = bitangent.y;
- bitangents[bitangentIndex++] = bitangent.z;
- bitangents[bitangentIndex++] = bitangent.x;
- bitangents[bitangentIndex++] = bitangent.y;
- bitangents[bitangentIndex++] = bitangent.z;
- }
- }
- }
- for (i = 0; i < slices; i++) {
- if (vertexFormat.normal) {
- normals[normalIndex++] = 0;
- normals[normalIndex++] = 0;
- normals[normalIndex++] = -1;
- }
- if (vertexFormat.tangent) {
- tangents[tangentIndex++] = 1;
- tangents[tangentIndex++] = 0;
- tangents[tangentIndex++] = 0;
- }
- if (vertexFormat.bitangent) {
- bitangents[bitangentIndex++] = 0;
- bitangents[bitangentIndex++] = -1;
- bitangents[bitangentIndex++] = 0;
- }
- }
- for (i = 0; i < slices; i++) {
- if (vertexFormat.normal) {
- normals[normalIndex++] = 0;
- normals[normalIndex++] = 0;
- normals[normalIndex++] = 1;
- }
- if (vertexFormat.tangent) {
- tangents[tangentIndex++] = 1;
- tangents[tangentIndex++] = 0;
- tangents[tangentIndex++] = 0;
- }
- if (vertexFormat.bitangent) {
- bitangents[bitangentIndex++] = 0;
- bitangents[bitangentIndex++] = 1;
- bitangents[bitangentIndex++] = 0;
- }
- }
- }
- var numIndices = 12 * slices - 12;
- var indices = IndexDatatype.createTypedArray(numVertices, numIndices);
- var index = 0;
- var j = 0;
- for (i = 0; i < slices - 1; i++) {
- indices[index++] = j;
- indices[index++] = j + 2;
- indices[index++] = j + 3;
- indices[index++] = j;
- indices[index++] = j + 3;
- indices[index++] = j + 1;
- j += 2;
- }
- indices[index++] = twoSlices - 2;
- indices[index++] = 0;
- indices[index++] = 1;
- indices[index++] = twoSlices - 2;
- indices[index++] = 1;
- indices[index++] = twoSlices - 1;
- for (i = 1; i < slices - 1; i++) {
- indices[index++] = twoSlices + i + 1;
- indices[index++] = twoSlices + i;
- indices[index++] = twoSlices;
- }
- for (i = 1; i < slices - 1; i++) {
- indices[index++] = threeSlices;
- indices[index++] = threeSlices + i;
- indices[index++] = threeSlices + i + 1;
- }
- var textureCoordIndex = 0;
- if (vertexFormat.st) {
- var rad = Math.max(topRadius, bottomRadius);
- for (i = 0; i < numVertices; i++) {
- var position = Cartesian3.fromArray(positions, i * 3, positionScratch);
- st[textureCoordIndex++] = (position.x + rad) / (2.0 * rad);
- st[textureCoordIndex++] = (position.y + rad) / (2.0 * rad);
- }
- }
- var attributes = new GeometryAttributes();
- if (vertexFormat.position) {
- attributes.position = new GeometryAttribute({
- componentDatatype: ComponentDatatype.DOUBLE,
- componentsPerAttribute: 3,
- values: positions,
- });
- }
- if (vertexFormat.normal) {
- attributes.normal = new GeometryAttribute({
- componentDatatype: ComponentDatatype.FLOAT,
- componentsPerAttribute: 3,
- values: normals,
- });
- }
- if (vertexFormat.tangent) {
- attributes.tangent = new GeometryAttribute({
- componentDatatype: ComponentDatatype.FLOAT,
- componentsPerAttribute: 3,
- values: tangents,
- });
- }
- if (vertexFormat.bitangent) {
- attributes.bitangent = new GeometryAttribute({
- componentDatatype: ComponentDatatype.FLOAT,
- componentsPerAttribute: 3,
- values: bitangents,
- });
- }
- if (vertexFormat.st) {
- attributes.st = new GeometryAttribute({
- componentDatatype: ComponentDatatype.FLOAT,
- componentsPerAttribute: 2,
- values: st,
- });
- }
- radiusScratch.x = length * 0.5;
- radiusScratch.y = Math.max(bottomRadius, topRadius);
- var boundingSphere = new BoundingSphere(
- Cartesian3.ZERO,
- Cartesian2.magnitude(radiusScratch)
- );
- if (defined(cylinderGeometry._offsetAttribute)) {
- length = positions.length;
- var applyOffset = new Uint8Array(length / 3);
- var offsetValue =
- cylinderGeometry._offsetAttribute === GeometryOffsetAttribute.NONE
- ? 0
- : 1;
- arrayFill(applyOffset, offsetValue);
- attributes.applyOffset = new GeometryAttribute({
- componentDatatype: ComponentDatatype.UNSIGNED_BYTE,
- componentsPerAttribute: 1,
- values: applyOffset,
- });
- }
- return new Geometry({
- attributes: attributes,
- indices: indices,
- primitiveType: PrimitiveType.TRIANGLES,
- boundingSphere: boundingSphere,
- offsetAttribute: cylinderGeometry._offsetAttribute,
- });
- };
- var unitCylinderGeometry;
- CylinderGeometry.getUnitCylinder = function () {
- if (!defined(unitCylinderGeometry)) {
- unitCylinderGeometry = CylinderGeometry.createGeometry(
- new CylinderGeometry({
- topRadius: 1.0,
- bottomRadius: 1.0,
- length: 1.0,
- vertexFormat: VertexFormat.POSITION_ONLY,
- })
- );
- }
- return unitCylinderGeometry;
- };
- export default CylinderGeometry;
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