UNKNOWN = 0,

NOT_EAR = 1,

EAR = 2

POS = 100,

NEG = 101,

COPLANAR = 200

NAKED_OR_SELF_INTER = 100,

SELF_INTER = 200,

TURNING = 300,

EMPHASIZED = 400,

SHARP = 500,

int tag;

int auxA, auxB;

Vector a, b;

static SEdge From(Vector a, Vector b);

bool EdgeCrosses(Vector a, Vector b, Vector *pi=NULL, SPointList *spl=NULL) const;

List<SEdge> l;

void Clear();

void AddEdge(Vector a, Vector b, int auxA=0, int auxB=0, int tag=0);

bool AssemblePolygon(SPolygon *dest, SEdge *errorAt, bool keepDir=false) const;

bool AssembleContour(Vector first, Vector last, SContour *dest,

SEdge *errorAt, bool keepDir) const;

int AnyEdgeCrossings(Vector a, Vector b,

Vector *pi=NULL, SPointList *spl=NULL) const;

bool ContainsEdgeFrom(const SEdgeList *sel) const;

bool ContainsEdge(const SEdge *se) const;

void CullExtraneousEdges(bool both=true);

void MergeCollinearSegments(Vector a, Vector b);

SEdge *se;

SEdgeLl *next;

static SEdgeLl *Alloc();

int which; // whether c is x, y, or z

double c;

SKdNodeEdges *gt;

SKdNodeEdges *lt;

SEdgeLl *edges;

static SKdNodeEdges *From(SEdgeList *sel);

static SKdNodeEdges *From(SEdgeLl *sell);

static SKdNodeEdges *Alloc();

int AnyEdgeCrossings(Vector a, Vector b, int cnt,

Vector *pi=NULL, SPointList *spl=NULL) const;

int tag;

EarType ear;

Vector p;

Vector auxv;

List<SPoint> l;

void Clear();

bool ContainsPoint(Vector pt) const;

int IndexForPoint(Vector pt) const;

void IncrementTagFor(Vector pt);

void Add(Vector pt);

int tag;

int timesEnclosed;

Vector xminPt;

List<SPoint> l;

void AddPoint(Vector p);

void MakeEdgesInto(SEdgeList *el) const;

void Reverse();

Vector ComputeNormal() const;

double SignedAreaProjdToNormal(Vector n) const;

bool IsClockwiseProjdToNormal(Vector n) const;

bool ContainsPointProjdToNormal(Vector n, Vector p) const;

void OffsetInto(SContour *dest, double r) const;

void CopyInto(SContour *dest) const;

void FindPointWithMinX();

Vector AnyEdgeMidpoint() const;

bool IsEar(int bp, double scaledEps) const;

bool BridgeToContour(SContour *sc, SEdgeList *el, List<Vector> *vl);

void ClipEarInto(SMesh *m, int bp, double scaledEps);

void UvTriangulateInto(SMesh *m, SSurface *srf);

List<SContour> l;

Vector normal;

Vector ComputeNormal() const;

void AddEmptyContour();

int WindingNumberForPoint(Vector p) const;

double SignedArea() const;

bool ContainsPoint(Vector p) const;

void MakeEdgesInto(SEdgeList *el) const;

void FixContourDirections();

void Clear();

bool SelfIntersecting(Vector *intersectsAt) const;

bool IsEmpty() const;

Vector AnyPoint() const;

void OffsetInto(SPolygon *dest, double r) const;

void UvTriangulateInto(SMesh *m, SSurface *srf);

void UvGridTriangulateInto(SMesh *m, SSurface *srf);

void TriangulateInto(SMesh *m) const;

void InverseTransformInto(SPolygon *sp, Vector u, Vector v, Vector n) const;

int tag;

STriMeta meta;

union {

struct { Vector a, b, c; };

Vector vertices[3];

};

union {

struct { Vector an, bn, cn; };

Vector normals[3];

};

static STriangle From(STriMeta meta, Vector a, Vector b, Vector c);

Vector Normal() const;

void FlipNormal();

double MinAltitude() const;

int WindingNumberForPoint(Vector p) const;

bool ContainsPoint(Vector p) const;

bool ContainsPointProjd(Vector n, Vector p) const;

STriangle Transform(Vector o, Vector u, Vector v) const;

bool Raytrace(const Vector &rayPoint, const Vector &rayDir,

double *t, Vector *inters) const;

double SignedVolume() const;

bool IsDegenerate() const;

Vector np; // normal to the plane

Vector no; // outer normal to the edge

double d;

SEdge edge;

SBsp2 *pos;

SBsp2 *neg;

SBsp2 *more;

void InsertTriangleHow(BspClass how, STriangle *tr, SMesh *m, SBsp3 *bsp3);

void InsertTriangle(STriangle *tr, SMesh *m, SBsp3 *bsp3);

Vector IntersectionWith(Vector a, Vector b) const;

void InsertEdge(SEdge *nedge, Vector nnp, Vector out);

static SBsp2 *InsertOrCreateEdge(SBsp2 *where, SEdge *nedge,

Vector nnp, Vector out);

static SBsp2 *Alloc();

Vector n;

double d;

STriangle tri;

SBsp3 *pos;

SBsp3 *neg;

SBsp3 *more;

SBsp2 *edges;

static SBsp3 *Alloc();

static SBsp3 *FromMesh(const SMesh *m);

Vector IntersectionWith(Vector a, Vector b) const;

void InsertHow(BspClass how, STriangle *str, SMesh *instead);

void Insert(STriangle *str, SMesh *instead);

static SBsp3 *InsertOrCreate(SBsp3 *where, STriangle *str, SMesh *instead);

void InsertConvexHow(BspClass how, STriMeta meta, Vector *vertex, size_t n,

SMesh *instead);

SBsp3 *InsertConvex(STriMeta meta, Vector *vertex, size_t n, SMesh *instead);

void InsertInPlane(bool pos2, STriangle *tr, SMesh *m);

void GenerateInPaintOrder(SMesh *m) const;

List<STriangle> l;

bool flipNormal;

bool keepCoplanar;

bool atLeastOneDiscarded;

bool isTransparent;

void Clear();

void AddTriangle(const STriangle *st);

void AddTriangle(STriMeta meta, Vector a, Vector b, Vector c);

void AddTriangle(STriMeta meta, Vector n,

Vector a, Vector b, Vector c);

void DoBounding(Vector v, Vector *vmax, Vector *vmin) const;

void GetBounding(Vector *vmax, Vector *vmin) const;

void Simplify(int start);

void AddAgainstBsp(SMesh *srcm, SBsp3 *bsp3);

void MakeFromUnionOf(SMesh *a, SMesh *b);

void MakeFromDifferenceOf(SMesh *a, SMesh *b);

void MakeFromCopyOf(SMesh *a);

void MakeFromTransformationOf(SMesh *a, Vector trans,

Quaternion q, double scale);

void MakeFromAssemblyOf(SMesh *a, SMesh *b);

void MakeEdgesInPlaneInto(SEdgeList *sel, Vector n, double d);

void MakeOutlinesInto(SOutlineList *sol, EdgeKind type);

void PrecomputeTransparency();

void RemoveDegenerateTriangles();

bool IsEmpty() const;

void RemapFaces(Group *g, int remap);

uint32_t FirstIntersectionWith(Point2d mp) const;

Vector GetCenterOfMass() const;

STriangle *tri;

STriangleLl *next;

static STriangleLl *Alloc();

int tag;

Vector a, b, nl, nr;

bool IsVisible(Vector projDir) const;

List<SOutline> l;

void Clear();

void AddEdge(Vector a, Vector b, Vector nl, Vector nr, int tag = 0);

void ListTaggedInto(SEdgeList *el, int auxA = 0, int auxB = 0);

void MakeFromCopyOf(SOutlineList *ol);

struct EdgeOnInfo {

int count;

bool frontFacing;

bool intersectsMesh;

STriangle *tr;

int ai;

int bi;

};

int which; // whether c is x, y, or z

double c;

SKdNode *gt;

SKdNode *lt;

STriangleLl *tris;

static SKdNode *Alloc();

static SKdNode *From(SMesh *m);

static SKdNode *From(STriangleLl *tll);

void AddTriangle(STriangle *tr);

void MakeMeshInto(SMesh *m) const;

void ListTrianglesInto(std::vector<STriangle *> *tl) const;

void ClearTags() const;

void FindEdgeOn(Vector a, Vector b, int cnt, bool coplanarIsInter, EdgeOnInfo *info) const;

void MakeCertainEdgesInto(SEdgeList *sel, EdgeKind how, bool coplanarIsInter,

bool *inter, bool *leaky, int auxA = 0) const;

void MakeOutlinesInto(SOutlineList *sel, EdgeKind tagKind) const;

void OcclusionTestLine(SEdge orig, SEdgeList *sel, int cnt) const;

void SplitLinesAgainstTriangle(SEdgeList *sel, STriangle *tr) const;

void SnapToMesh(SMesh *m);

void SnapToVertex(Vector v, SMesh *extras);

struct Edge;

struct Vertex {

Vector pos;

std::vector<Edge *> edges;

bool GetNext(uint32_t kind, Vertex **next, Edge **nextEdge);

bool GetNext(uint32_t kind, Vector plane, double d, Vertex **next, Edge **nextEdge);

size_t CountEdgesWithTagAndKind(int tag, uint32_t kind) const;

};

struct VertexPairHash {

size_t operator()(const std::pair<Vertex *, Vertex *> &v) const;

};

struct Edge {

Vertex *a;

Vertex *b;

uint32_t kind;

int tag;

union {

uintptr_t data;

SOutline *outline;

SEdge *edge;

};

Vertex *GetOtherVertex(Vertex *v) const;

bool GetStartAndNext(Vertex **start, Vertex **next, bool loop) const;

};

std::unordered_map<Vector, Vertex *, VectorHash, VectorPred> vertices;

std::unordered_map<std::pair<Vertex *, Vertex *>, Edge *, VertexPairHash> edgeMap;

std::vector<Edge *> edges;

~PolylineBuilder();

void Clear();

Vertex *AddVertex(const Vector &pos);

Edge *AddEdge(const Vector &p0, const Vector &p1, uint32_t kind, uintptr_t data = 0);

void Generate(

std::function<void(Vertex *start, Vertex *next, Edge *edge)> startFunc,

std::function<void(Vertex *next, Edge *edge)> nextFunc,

std::function<void(Edge *)> aloneFunc,

std::function<void()> endFunc = [](){});

void MakeFromEdges(const SEdgeList &sel);

void MakeFromOutlines(const SOutlineList &sol);

void GenerateEdges(SEdgeList *sel);

void GenerateOutlines(SOutlineList *sol);