initial commit, 4.5 stable

thirdparty/jolt_physics/Jolt/Core/LinearCurve.h

@@ -0,0 +1,67 @@
+// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
+// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#include <Jolt/ObjectStream/SerializableObject.h>
+#include <Jolt/Core/QuickSort.h>
+
+JPH_NAMESPACE_BEGIN
+
+class StreamOut;
+class StreamIn;
+
+// A set of points (x, y) that form a linear curve
+class JPH_EXPORT LinearCurve
+{
+	JPH_DECLARE_SERIALIZABLE_NON_VIRTUAL(JPH_EXPORT, LinearCurve)
+
+public:
+	/// A point on the curve
+	class Point
+	{
+		JPH_DECLARE_SERIALIZABLE_NON_VIRTUAL(JPH_EXPORT, Point)
+
+	public:
+		float			mX = 0.0f;
+		float			mY = 0.0f;
+	};
+
+	/// Remove all points
+	void				Clear()											{ mPoints.clear(); }
+
+	/// Reserve memory for inNumPoints points
+	void				Reserve(uint inNumPoints)						{ mPoints.reserve(inNumPoints); }
+
+	/// Add a point to the curve. Points must be inserted in ascending X or Sort() needs to be called when all points have been added.
+	/// @param inX X value
+	/// @param inY Y value
+	void				AddPoint(float inX, float inY)					{ mPoints.push_back({ inX, inY }); }
+
+	/// Sort the points on X ascending
+	void				Sort()											{ QuickSort(mPoints.begin(), mPoints.end(), [](const Point &inLHS, const Point &inRHS) { return inLHS.mX < inRHS.mX; }); }
+
+	/// Get the lowest X value
+	float				GetMinX() const									{ return mPoints.empty()? 0.0f : mPoints.front().mX; }
+
+	/// Get the highest X value
+	float				GetMaxX() const									{ return mPoints.empty()? 0.0f : mPoints.back().mX; }
+
+	/// Sample value on the curve
+	/// @param inX X value to sample at
+	/// @return Interpolated Y value
+	float				GetValue(float inX) const;
+
+	/// Saves the state of this object in binary form to inStream.
+	void				SaveBinaryState(StreamOut &inStream) const;
+
+	/// Restore the state of this object from inStream.
+	void				RestoreBinaryState(StreamIn &inStream);
+
+	/// The points on the curve, should be sorted ascending by x
+	using Points = Array<Point>;
+	Points				mPoints;
+};
+
+JPH_NAMESPACE_END