ParabolaCurve.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "Geo/Curves/Curve.h"
 
namespace UE::CADKernel
{
 
class CADKERNEL_API FParabolaCurve : public FCurve
{
    friend class FIGESEntity104;
    friend class FEntity;
 
protected:
    FMatrixH Matrix;
    double FocalDistance;
 
    FParabolaCurve(const FMatrixH& InMatrix, double InFocalDistance, const FLinearBoundary& InBounds, int8 InDimension = 3)
        : FCurve(InBounds, InDimension)
        , Matrix(InMatrix)
        , FocalDistance(InFocalDistance)
    {
    }
 
    FParabolaCurve() = default;
 
public:
 
    virtual void Serialize(FCADKernelArchive& Ar) override
    {
        FCurve::Serialize(Ar);
        Ar << Matrix;
        Ar << FocalDistance;
    }
 
#ifdef CADKERNEL_DEV
    virtual FInfoEntity& GetInfo(FInfoEntity&) const override;
#endif
 
    virtual ECurve GetCurveType() const override
    {
        return ECurve::Parabola;
    }
 
    virtual TSharedPtr<FEntityGeom> ApplyMatrix(const FMatrixH& InMatrix) const override;
    virtual void Offset(const FVector& OffsetDirection) override;
 
    virtual void ExtendTo(const FVector& Point) override
    {
        ensureCADKernel(false);
    }
 
    virtual void EvaluatePoint(double Coordinate, FCurvePoint& OutPoint, int32 DerivativeOrder = 0) const override
    {
        ensureCADKernel(Dimension == 3);
 
        OutPoint.DerivativeOrder = DerivativeOrder;
 
        OutPoint.Point = Matrix.Multiply(FVector(Coordinate * Coordinate * FocalDistance, Coordinate, 0.));
 
        if (DerivativeOrder > 0)
        {
            OutPoint.Gradient = Matrix.MultiplyVector(FVector(2.0 * Coordinate * FocalDistance, 1., 0.));
 
            if (DerivativeOrder > 1)
            {
                OutPoint.Laplacian = Matrix.MultiplyVector(FVector(2.0 * FocalDistance, 0., 0.));
            }
        }
    }
 
    virtual void Evaluate2DPoint(double Coordinate, FCurvePoint2D& OutPoint, int32 DerivativeOrder = 0) const override
    {
        ensureCADKernel(Dimension == 2);
 
        OutPoint.DerivativeOrder = DerivativeOrder;
 
        OutPoint.Point = Matrix.Multiply2D(FVector2d(Coordinate * Coordinate * FocalDistance, Coordinate));
 
        if (DerivativeOrder > 0)
        {
            OutPoint.Gradient = Matrix.MultiplyVector2D(FVector2d(2.0 * Coordinate * FocalDistance, 1.));
 
            if (DerivativeOrder > 1)
            {
                OutPoint.Laplacian = Matrix.MultiplyVector2D(FVector2d(2.0 * FocalDistance, 0.));
            }
        }
    }
};
 
} // namespace UE::CADKernel