tagvolumeslicer.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/containers/kyarray.h"
#include "gwnavruntime/kernel/SF_RefCount.h"
#include "gwnavruntime/base/memory.h"
#include "gwnavruntime/math/vec2i.h"
#include "gwnavruntime/math/vec3f.h"
#include "gwnavruntime/dynamicnavmesh/contourlineextractor.h"
#include "gwnavruntime/querysystem/workingmemcontainers/workingmemarray.h"
#include "../containers/bitfield.h"

namespace Kaim
{

class WorkingMemory;
class NavFloor;
class Database;
class NavFloorBlob;
class TagVolume;
class DisplayList;

enum TagVolumeSlicerResult
{
    TAG_VOLUME_SLICE_RESULT_SKIPPED,
    TAG_VOLUME_SLICE_RESULT_SUCCESS,
    TAG_VOLUME_SLICE_RESULT_FAILURE
};


class ContourLineEdgePiece
{
    KY_DEFINE_NEW_DELETE_OPERATORS(Stat_Default_Mem)
public:
    ContourLineEdgePiece() : m_parentEdge(nullptr), m_swap(false), m_canceled(false), m_inPolygon(false), m_currentPolygonIdx(0) {}
public:
    EdgePoints m_edgePiece;
    const ContourLineEdge* m_parentEdge;
    bool m_swap;
    bool m_canceled;
    bool m_inPolygon;
    KyUInt16 m_currentPolygonIdx;
};

class TypedIndexedPos
{
public:
    enum PointType
    {
        TagVolumeEdgeExtremity            = /*1 <<*/ 0,
        LevelLineEdgeExtremity            = /*1 <<*/ 1,
        DiagonalEdgeExtremity             = /*1 <<*/ 2,
        IntersectionWithLevelLineDiagonal = /*1 <<*/ 3,
        IntersectionWithFloorLink         = /*1 <<*/ 4,
        IntersectionWithBorder            = /*1 <<*/ 5,

        InvalidPointType
    };

    TypedIndexedPos() : m_index(KyUInt32MAXVAL), m_pointType(InvalidPointType) {}
    TypedIndexedPos(const Vec2i& pos, KyUInt32 index, PointType pointType) :
        m_pos(pos), m_index(index), m_pointType(pointType) {}

public:
    Vec2i m_pos;
    KyUInt32 m_index;
    PointType m_pointType;
};

class TypedIndexedPosSorter
{
public:
    bool operator() (const TypedIndexedPos& hotPoint1, const TypedIndexedPos& hotPoint2) const
    {
        return hotPoint1.m_pos < hotPoint2.m_pos;
    }
};

class UniqueHotPoint
{
public:
    UniqueHotPoint() {}
    UniqueHotPoint(const Vec2i& pos) : m_pos(pos) {}
public:
    Vec2i m_pos;
};

class TagVolumeSlicer
{
    KY_DEFINE_NEW_DELETE_OPERATORS(Stat_Default_Mem)

public:
    TagVolumeSlicer(Database* db, NavFloor* navFloor, WorkingMemory* workingMemory) :
    m_database(db), m_navFloor(navFloor), m_workingMemory(workingMemory), m_slicedTagVolumes(nullptr) {}

public:
    TagVolumeSlicerResult SliceTagVolumeAccordingToAltitudes(const TagVolume* tagVolume, KyArray<KyArrayPOD<Vec2i> >& slicedTagVolumes, DisplayList* displayList);

private:
    enum InternalResult
    {
        Stop_Failure,
        Stop_SkipTagVolume,
        Stop_KeepTagVolumeContour,
        KeppGoingOn
    };
    void Clear();

    KyResult ComputeTagVolumeContour(const TagVolume& tagVolume);

    KyResult ComputeNavFloorData(WorkingMemArray<PixelBox>& trianglePixelBoxArray, WorkingMemArray<Vec3f>& staticFloatVertices,
        WorkingMemBitField& triangleVsTagVolumeBoxIntersection);

    KyResult ExtractLevelLines(const WorkingMemBitField& triangleVsTagVolumeBoxIntersection, const WorkingMemArray<Vec3f>& staticFloatVertices);

    void ComputeTriangleIndexAndVertexStatusOfTagVolumeVertices(const WorkingMemArray<PixelBox>& trianglePixelBoxArray, const WorkingMemArray<Vec3f>& staticFloatVertices);

    InternalResult IntersectContourLineWithTagVolume();

    KyResult BuildPolygons(KyArray<KyArrayPOD<Vec2i> >& result);
    KyResult BuildPolygonFromTagVolume(KyArray<KyArray<Vec2i> >& result);

    KyResult MarkAsTreatedPairedLevelLineEdges(BitField& levelLinesIsPaired, KyUInt32& firstNonTVEdge);
    KyFloat32 GetAltitudeOfPointInTriangle(const Vec2i& tVpixelPos, const WorkingMemArray<Vec3f>& staticFloatVertices, NavTriangleIdx triangleIdx);
    bool ProjectTagVolumePixelPosInStaticFloor(const WorkingMemArray<PixelBox>& trianglePixelBoxArray, const Vec2i& tVpixelPos,
        NavTriangleIdx& triangleIdx);

    void AddTagVolumeEdgesToContourLines();
    KyResult ComputeAllContourEdgeBBox(WorkingMemArray<Box2i>& edgeBoundingBoxes);
    void AddAllEdgeExtremitiesToHotPoints(WorkingMemArray<TypedIndexedPos>& hotPoints);
    KyResult ComputeIntersections(const WorkingMemArray<Box2i>& edgeBoundingBoxes, KyArray<KyArrayPOD<KyUInt32> >& cuts,
        WorkingMemArray<TypedIndexedPos>& hotPoints);

    TypedIndexedPos::PointType GetIntersectionPointType(ContourLineEdgeType nonTvEdgeType);

    KyResult RemoveDuplicatedHotPoints(WorkingMemArray<TypedIndexedPos>& hotPoints, WorkingMemArray<UniqueHotPoint>& uniqueHotPoints, KyArray<KyArrayPOD<KyUInt32> >& cuts);
    void BreakEdgesOnHotPoints(const WorkingMemArray<Box2i>& edgeBoundingBoxes, WorkingMemArray<UniqueHotPoint>& uniqueHotPoints, KyArray<KyArrayPOD<KyUInt32> >& cuts);
    void SortCuts(const WorkingMemArray<UniqueHotPoint>& uniqueHotPoints, KyArray<KyArrayPOD<KyUInt32> >& cuts);
    void BuildFinalTagVolumeBrokenContour(const WorkingMemArray<UniqueHotPoint>& uniqueHotPoints, KyArray<KyArrayPOD<KyUInt32> >& cuts);
    void BuildContourEdgePiece(const WorkingMemArray<UniqueHotPoint>& uniqueHotPoints, KyArray<KyArrayPOD<KyUInt32> >& cuts);

    KyResult BuildPolygonsStartingFromTagVolumeEdges(KyUInt32 firstNonTVEdge, KyArray<KyArrayPOD<Vec2i> >& result, BitField& treatedEdges);
    KyResult BuildOtherPolygons(KyUInt32 firstNonTVEdge, KyArray<KyArrayPOD<Vec2i> >& result, BitField& treatedEdges);

    void RenderLevelLines(DisplayList* displayList);
    void RenderBrokenEdges(DisplayList* displayList);
    void RenderSlicedTagVolumes(const KyArray<KyArrayPOD<Vec2i> >& result, DisplayList* displayList);

    void PrintTagVolumeForDebug(const TagVolume* tagVolume);
private:
    Database* m_database;
    NavFloor* m_navFloor;
    WorkingMemory* m_workingMemory;

    KyFloat32 m_altMin;
    KyFloat32 m_altMax;
    PixelBox m_tagVolumePixelBox;
    PixelBox m_tagVolumePixelBoxEnlargeOf1;
    // internal
    KyArrayPOD<Vec2i> m_tagVolumePixelPos;
    enum TvAltStatus
    {
        TVALTSTATUS_INSIDE,
        TVALTSTATUS_OUTSIDE,
        TVALTSTATUS_UNSET
    };

    KyArrayPOD<TvAltStatus> m_verticesAltStatus;

    KyArrayPOD<Vec2i> m_brokenTagVolumePixelPos;
    KyArray<ContourLineEdge> m_contourLineEdges;
    KyArray<ContourLineEdgePiece> m_contourLineEdgePiece;
    KyArray<KyArrayPOD<Vec2i> >* m_slicedTagVolumes;
    KyUInt16 m_polygonCount;
};

}