flooraltituderange.h

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/*
* Copyright 2016 Autodesk, Inc. All rights reserved.
* Use of this software is subject to the terms of the Autodesk license agreement and any attachments or Appendices thereto provided at the time of installation or download,
* or which otherwise accompanies this software in either electronic or hard copy form, or which is signed by you and accepted by Autodesk.
*/

#pragma once

#include "gwnavruntime/navmesh/navmeshtypes.h"

namespace Kaim
{

class FloorAltitudeRange
{
    KY_DEFINE_NEW_DELETE_OPERATORS(MemStat_NavData)
public:
    FloorAltitudeRange() { Clear(); }

    void Clear()
    {
        m_maxZ = -KyFloat32MAXVAL;
        m_minZ = KyFloat32MAXVAL;
    }

    bool IsAltitudeInside(KyFloat32 altitude, KyFloat32 toleranceAboveFloor, KyFloat32 toleranceBelowFloor) const;

    bool DoesIntersect(const FloorAltitudeRange& other) const;

    bool DoesIntersect(KyFloat32 zmin, KyFloat32 zmax) const;

    void Update(KyFloat32 altitude);

    KyFloat32 GetAltDiff() const { return m_maxZ - m_minZ; }
public:
    KyFloat32 m_minZ;  
    KyFloat32 m_maxZ;  
};

KY_INLINE void SwapEndianness(Endianness::Target e, FloorAltitudeRange& self)
{
    SwapEndianness(e, self.m_minZ);
    SwapEndianness(e, self.m_maxZ);
}


KY_INLINE bool FloorAltitudeRange::IsAltitudeInside(KyFloat32 altitude, KyFloat32 toleranceAboveFloor, KyFloat32 toleranceBelowFloor) const
{
    const KyFloat32 operand1 = Fsel(altitude - (m_minZ - toleranceBelowFloor), 1.f, 0.f); // (operand1 == 1.f) <=> (altitude >= m_minZ - toleranceBelowFloor)
    const KyFloat32 operand2 = Fsel((m_maxZ + toleranceAboveFloor) - altitude, 1.f, 0.f); // (operand2 == 1.f) <=> (m_maxZ + toleranceAboveFloor >= altitude)

    return operand1 * operand2 > 0.f;
}

KY_INLINE bool FloorAltitudeRange::DoesIntersect(const FloorAltitudeRange& other) const
{
    return DoesIntersect(other.m_minZ, other.m_maxZ);
}

KY_INLINE bool FloorAltitudeRange::DoesIntersect(KyFloat32 zmin, KyFloat32 zmax) const
{
    const KyFloat32 operand1 = Fsel(zmax - m_minZ, 1.f, 0.f); // (operand1 == 1.f) <=> (other.m_maxZ >= m_minZ)
    const KyFloat32 operand2 = Fsel(m_maxZ - zmin, 1.f, 0.f); // (operand2 == 1.f) <=> (m_maxZ >= other.m_minZ)

    return operand1 * operand2 > 0.f;
}

KY_INLINE void FloorAltitudeRange::Update(KyFloat32 altitude)
{
    m_minZ = Kaim::Min(m_minZ, altitude);
    m_maxZ = Kaim::Max(m_maxZ, altitude);
}

}