40 lines
1.0 KiB
C++
40 lines
1.0 KiB
C++
// Copyright 2020-2024 CesiumGS, Inc. and Contributors
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#pragma once
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#include <glm/mat4x4.hpp>
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/**
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* Constants useful for transformation between Cesium and Unreal Engine
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* coordinate systems.
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*/
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class CesiumTransforms {
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public:
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/**
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* The constant to multiply to transform meters to centimeters (100.0).
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*/
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static const double metersToCentimeters;
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/**
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* The constant to multiply to transform centimeters to meters (0.01).
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*/
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static const double centimetersToMeters;
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/**
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* A matrix to scale Cesium's meters up to Unreal's centimeters.
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*/
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static const glm::dmat4x4 scaleToUnrealWorld;
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/**
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* A matrix to scale down Unreal's centimeters into Cesium's meters.
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*/
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static const glm::dmat4x4 scaleToCesium;
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/**
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* A matrix to transform Cesium's right-handed, Z-up coordinate system to
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* Unreal's left-handed, Z-up coordinate system by inverting the Y coordinate.
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* This same transformation can also go the other way.
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*/
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static const glm::dmat4x4 unrealToOrFromCesium;
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};
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