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52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
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// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
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// SPDX-License-Identifier: MIT
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#include <Jolt/Jolt.h>
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#include <Jolt/Core/LinearCurve.h>
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#include <Jolt/Core/StreamIn.h>
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#include <Jolt/Core/StreamOut.h>
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#include <Jolt/ObjectStream/TypeDeclarations.h>
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JPH_NAMESPACE_BEGIN
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JPH_IMPLEMENT_SERIALIZABLE_NON_VIRTUAL(LinearCurve::Point)
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{
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JPH_ADD_ATTRIBUTE(Point, mX)
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JPH_ADD_ATTRIBUTE(Point, mY)
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}
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JPH_IMPLEMENT_SERIALIZABLE_NON_VIRTUAL(LinearCurve)
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{
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JPH_ADD_ATTRIBUTE(LinearCurve, mPoints)
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}
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float LinearCurve::GetValue(float inX) const
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{
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if (mPoints.empty())
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return 0.0f;
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Points::const_iterator i2 = std::lower_bound(mPoints.begin(), mPoints.end(), inX, [](const Point &inPoint, float inValue) { return inPoint.mX < inValue; });
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if (i2 == mPoints.begin())
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return mPoints.front().mY;
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else if (i2 == mPoints.end())
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return mPoints.back().mY;
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Points::const_iterator i1 = i2 - 1;
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return i1->mY + (inX - i1->mX) * (i2->mY - i1->mY) / (i2->mX - i1->mX);
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}
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void LinearCurve::SaveBinaryState(StreamOut &inStream) const
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{
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inStream.Write(mPoints);
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}
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void LinearCurve::RestoreBinaryState(StreamIn &inStream)
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{
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inStream.Read(mPoints);
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}
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JPH_NAMESPACE_END
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