import Cartesian3 from "./Cartesian3.js";
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/**
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* @private
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*/
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var TerrainExaggeration = {};
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/**
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* Scales a height relative to an offset.
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*
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* @param {Number} height The height.
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* @param {Number} scale A scalar used to exaggerate the terrain. If the value is 1.0 there will be no effect.
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* @param {Number} relativeHeight The height relative to which terrain is exaggerated. If the value is 0.0 terrain will be exaggerated relative to the ellipsoid surface.
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*/
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TerrainExaggeration.getHeight = function (height, scale, relativeHeight) {
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return (height - relativeHeight) * scale + relativeHeight;
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};
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var scratchCartographic = new Cartesian3();
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/**
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* Scales a position by exaggeration.
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*/
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TerrainExaggeration.getPosition = function (
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position,
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ellipsoid,
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terrainExaggeration,
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terrainExaggerationRelativeHeight,
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result
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) {
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var cartographic = ellipsoid.cartesianToCartographic(
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position,
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scratchCartographic
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);
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var newHeight = TerrainExaggeration.getHeight(
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cartographic.height,
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terrainExaggeration,
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terrainExaggerationRelativeHeight
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);
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return Cartesian3.fromRadians(
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cartographic.longitude,
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cartographic.latitude,
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newHeight,
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ellipsoid,
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result
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);
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};
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export default TerrainExaggeration;
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