@loaders.gl/i3s
Version:
i3s .
84 lines (83 loc) • 2.69 kB
JavaScript
// loaders.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors
import { GL } from '@loaders.gl/math';
export function getConstructorForDataFormat(dataType) {
switch (dataType) {
case 'UInt8':
return Uint8Array;
case 'UInt16':
return Uint16Array;
case 'UInt32':
return Uint32Array;
case 'Float32':
return Float32Array;
case 'UInt64':
return Float64Array;
default:
throw new Error(`parse i3s tile content: unknown type of data: ${dataType}`);
}
}
export const GL_TYPE_MAP = {
UInt8: GL.UNSIGNED_BYTE,
UInt16: GL.UNSIGNED_SHORT,
Float32: GL.FLOAT,
UInt32: GL.UNSIGNED_INT,
UInt64: GL.DOUBLE
};
/**
* Returns how many bytes a type occupies
* @param dataType
* @returns
*/
export function sizeOf(dataType) {
switch (dataType) {
case 'UInt8':
return 1;
case 'UInt16':
case 'Int16':
return 2;
case 'UInt32':
case 'Int32':
case 'Float32':
return 4;
case 'UInt64':
case 'Int64':
case 'Float64':
return 8;
default:
throw new Error(`parse i3s tile content: unknown size of data: ${dataType}`);
}
}
export const STRING_ATTRIBUTE_TYPE = 'String';
export const OBJECT_ID_ATTRIBUTE_TYPE = 'Oid32';
export const FLOAT_64_TYPE = 'Float64';
export const INT_16_ATTRIBUTE_TYPE = 'Int16';
// https://github.com/visgl/deck.gl/blob/9548f43cba2234a1f4877b6b17f6c88eb35b2e08/modules/core/src/lib/constants.js#L27
// Describes the format of positions
export var COORDINATE_SYSTEM;
(function (COORDINATE_SYSTEM) {
/**
* `LNGLAT` if rendering into a geospatial viewport, `CARTESIAN` otherwise
*/
COORDINATE_SYSTEM[COORDINATE_SYSTEM["DEFAULT"] = -1] = "DEFAULT";
/**
* Positions are interpreted as [lng, lat, elevation]
* lng lat are degrees, elevation is meters. distances as meters.
*/
COORDINATE_SYSTEM[COORDINATE_SYSTEM["LNGLAT"] = 1] = "LNGLAT";
/**
* Positions are interpreted as meter offsets, distances as meters
*/
COORDINATE_SYSTEM[COORDINATE_SYSTEM["METER_OFFSETS"] = 2] = "METER_OFFSETS";
/**
* Positions are interpreted as lng lat offsets: [deltaLng, deltaLat, elevation]
* deltaLng, deltaLat are delta degrees, elevation is meters.
* distances as meters.
*/
COORDINATE_SYSTEM[COORDINATE_SYSTEM["LNGLAT_OFFSETS"] = 3] = "LNGLAT_OFFSETS";
/**
* Non-geospatial
*/
COORDINATE_SYSTEM[COORDINATE_SYSTEM["CARTESIAN"] = 0] = "CARTESIAN";
})(COORDINATE_SYSTEM || (COORDINATE_SYSTEM = {}));