@itwin/core-frontend
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iTwin.js frontend components
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JavaScript
;
/*---------------------------------------------------------------------------------------------
* Copyright (c) Bentley Systems, Incorporated. All rights reserved.
* See LICENSE.md in the project root for license terms and full copyright notice.
*--------------------------------------------------------------------------------------------*/
/** @packageDocumentation
* @module Views
*/
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if (k2 === undefined) k2 = k;
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Object.defineProperty(o, "default", { enumerable: true, value: v });
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var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.ApproximateTerrainHeights = void 0;
const core_bentley_1 = require("@itwin/core-bentley");
const core_geometry_1 = require("@itwin/core-geometry");
const core_common_1 = require("@itwin/core-common");
const internal_1 = require("./tile/internal");
let instance;
/**
* A collection of functions for approximating terrain height
* @internal
*/
class ApproximateTerrainHeights {
static maxLevel = 6;
globalHeightRange = core_geometry_1.Range1d.createXX(-400, 90000); // Dead Sea to Mount Everest.
_terrainHeights;
_scratchCorners = [core_common_1.Cartographic.createZero(), core_common_1.Cartographic.createZero(), core_common_1.Cartographic.createZero(), core_common_1.Cartographic.createZero()];
_tilingScheme = new internal_1.GeographicTilingScheme(2, 1, true); // Y at top... ?
_scratchTileXY = core_geometry_1.Point2d.createZero();
static get instance() {
if (undefined === instance)
instance = new ApproximateTerrainHeights();
return instance;
}
/**
* Initializes the minimum and maximum terrain heights.
* @return {Promise}
*/
async initialize() {
if (!this._terrainHeights) {
const { terrainHeightsPropsString } = await Promise.resolve().then(() => __importStar(require("./ApproximateTerrainHeightsProps")));
this._terrainHeights = JSON.parse(terrainHeightsPropsString);
}
}
getTileHeightRange(quadId, result) {
result = core_geometry_1.Range1d.createFrom(this.globalHeightRange, result);
if (undefined === this._terrainHeights)
return result; // Not initialized.
let level = quadId.level, column = quadId.column, row = quadId.row;
if (level > 6) {
column = column >> (level - 6);
row = row >> quadId.row >> ((level - 6));
level = 6;
}
const key = `${level}-${column}-${row}`;
const heights = this._terrainHeights[key];
(0, core_bentley_1.assert)(undefined !== heights);
result.low = heights[0];
result.high = heights[1];
return result;
}
getMinimumMaximumHeights(rectangle, result) {
result = core_geometry_1.Range1d.createFrom(this.globalHeightRange, result);
if (undefined === this._terrainHeights)
return result; // Not initialized.
const xyLevel = this._getTileXYLevel(rectangle);
if (undefined !== xyLevel) {
const key = `${xyLevel.level}-${xyLevel.x}-${xyLevel.y}`;
const heights = this._terrainHeights[key];
(0, core_bentley_1.assert)(undefined !== heights);
if (undefined !== heights) {
result.low = heights[0];
result.high = heights[1];
}
}
return result;
}
_getTileXYLevel(rectangle) {
core_common_1.Cartographic.fromRadians({ longitude: rectangle.low.x, latitude: rectangle.high.y, height: 0.0 }, this._scratchCorners[0]);
core_common_1.Cartographic.fromRadians({ longitude: rectangle.high.x, latitude: rectangle.high.y, height: 0.0 }, this._scratchCorners[1]);
core_common_1.Cartographic.fromRadians({ longitude: rectangle.low.x, latitude: rectangle.low.y, height: 0.0 }, this._scratchCorners[2]);
core_common_1.Cartographic.fromRadians({ longitude: rectangle.high.x, latitude: rectangle.low.y, height: 0.0 }, this._scratchCorners[3]);
// Determine which tile the bounding rectangle is in
let lastLevelX = 0, lastLevelY = 0;
let currentX = 0, currentY = 0;
const maxLevel = ApproximateTerrainHeights.maxLevel;
let i;
for (i = 0; i <= maxLevel; ++i) {
let failed = false;
for (let j = 0; j < 4; ++j) {
const corner = this._scratchCorners[j];
this._tilingScheme.cartographicToTileXY(corner, i, this._scratchTileXY);
if (j === 0) {
currentX = this._scratchTileXY.x;
currentY = this._scratchTileXY.y;
}
else if (currentX !== this._scratchTileXY.x || currentY !== this._scratchTileXY.y) {
failed = true;
break;
}
}
if (failed)
break;
lastLevelX = currentX;
lastLevelY = currentY;
}
if (i === 0) {
return undefined;
}
return {
x: lastLevelX,
y: lastLevelY,
level: (i > maxLevel) ? maxLevel : (i - 1),
};
}
}
exports.ApproximateTerrainHeights = ApproximateTerrainHeights;
//# sourceMappingURL=ApproximateTerrainHeights.js.map