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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | 96x 96x 96x 96x 95x 94x 94x 61x 85x 85x 85x 85x 94x 94x 20x 24x 24x 94x 94x 22x 22x 22x 94x | import Check from "../Core/Check.js";
import Frozen from "../Core/Frozen.js";
import defined from "../Core/defined.js";
import PropertyTable from "./PropertyTable.js";
import PropertyTexture from "./PropertyTexture.js";
import PropertyAttribute from "./PropertyAttribute.js";
import StructuralMetadata from "./StructuralMetadata.js";
import MetadataTable from "./MetadataTable.js";
/**
* Parse the <code>EXT_structural_metadata</code> glTF extension to create a
* structural metadata object.
*
* @param {object} options Object with the following properties:
* @param {object} options.extension The extension JSON object.
* @param {MetadataSchema} options.schema The parsed schema.
* @param {Object<string, Uint8Array>} [options.bufferViews] An object mapping bufferView IDs to Uint8Array objects.
* @param {Object<string, Texture>} [options.textures] An object mapping texture IDs to {@link Texture} objects.
* @return {StructuralMetadata} A structural metadata object
* @private
* @experimental This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.
*/
function parseStructuralMetadata(options) {
options = options ?? Frozen.EMPTY_OBJECT;
const extension = options.extension;
// The calling code is responsible for loading the schema.
// This keeps metadata parsing synchronous.
const schema = options.schema;
//>>includeStart('debug', pragmas.debug);
Check.typeOf.object("options.extension", extension);
Check.typeOf.object("options.schema", schema);
//>>includeEnd('debug');
const propertyTables = [];
if (defined(extension.propertyTables)) {
for (let i = 0; i < extension.propertyTables.length; i++) {
const propertyTable = extension.propertyTables[i];
const classDefinition = schema.classes[propertyTable.class];
const metadataTable = new MetadataTable({
count: propertyTable.count,
properties: propertyTable.properties,
class: classDefinition,
bufferViews: options.bufferViews,
});
propertyTables.push(
new PropertyTable({
id: i,
name: propertyTable.name,
count: propertyTable.count,
metadataTable: metadataTable,
extras: propertyTable.extras,
extensions: propertyTable.extensions,
}),
);
}
}
const propertyTextures = [];
if (defined(extension.propertyTextures)) {
for (let i = 0; i < extension.propertyTextures.length; i++) {
const propertyTexture = extension.propertyTextures[i];
propertyTextures.push(
new PropertyTexture({
id: i,
name: propertyTexture.name,
propertyTexture: propertyTexture,
class: schema.classes[propertyTexture.class],
textures: options.textures,
}),
);
}
}
const propertyAttributes = [];
if (defined(extension.propertyAttributes)) {
for (let i = 0; i < extension.propertyAttributes.length; i++) {
const propertyAttribute = extension.propertyAttributes[i];
propertyAttributes.push(
new PropertyAttribute({
id: i,
name: propertyAttribute.name,
class: schema.classes[propertyAttribute.class],
propertyAttribute: propertyAttribute,
}),
);
}
}
return new StructuralMetadata({
schema: schema,
propertyTables: propertyTables,
propertyTextures: propertyTextures,
propertyAttributes: propertyAttributes,
statistics: extension.statistics,
extras: extension.extras,
extensions: extension.extensions,
});
}
export default parseStructuralMetadata;
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