mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-26 13:50:33 +05:00
404 lines
11 KiB
C++
404 lines
11 KiB
C++
#ifndef FILE_STLTOPOLOGY
|
|
#define FILE_STLTOPOLOGY
|
|
|
|
/**************************************************************************/
|
|
/* File: stltopology.hpp */
|
|
/* Author: Joachim Schoeberl */
|
|
/* Author2: Johannes Gerstmayr */
|
|
/* Date: 26. Jul. 99 */
|
|
/**************************************************************************/
|
|
|
|
/*
|
|
The STLTopology contains topologic information as
|
|
triangle->point, point->triangles, triangle->edge, 2-points->edge,...
|
|
*/
|
|
|
|
|
|
namespace netgen {
|
|
|
|
class STLGeometry;
|
|
|
|
// #define STLBASE 1
|
|
|
|
class STLPointId
|
|
{
|
|
int i;
|
|
public:
|
|
STLPointId () { ; }
|
|
constexpr STLPointId (int ai) : i(ai) { ; }
|
|
STLPointId & operator= (const STLPointId & ai) { i = ai.i; return *this; }
|
|
STLPointId & operator= (int ai) { i = ai; return *this; }
|
|
constexpr operator int () const { return i; }
|
|
STLPointId operator++ (int) { return i++; }
|
|
STLPointId operator-- (int) { return i--; }
|
|
STLPointId & operator++ () { i++; return *this; }
|
|
|
|
void DoArchive(Archive& ar) { ar & i; }
|
|
};
|
|
|
|
|
|
|
|
class STLTrigId
|
|
{
|
|
int i;
|
|
public:
|
|
STLTrigId () { ; }
|
|
constexpr STLTrigId (int ai) : i(ai) { ; }
|
|
STLTrigId & operator= (const STLTrigId & ai) { i = ai.i; return *this; }
|
|
STLTrigId & operator= (int ai) { i = ai; return *this; }
|
|
constexpr operator int () const { return i; }
|
|
STLTrigId operator++ (int) { return i++; }
|
|
STLTrigId operator-- (int) { return i--; }
|
|
STLTrigId & operator++ () { i++; return *this; }
|
|
|
|
};
|
|
|
|
inline void SetInvalid (STLTrigId & id) { id = 0; }
|
|
|
|
}
|
|
|
|
|
|
namespace ngcore
|
|
{
|
|
template<>
|
|
constexpr netgen::STLPointId IndexBASE<netgen::STLPointId> () { return netgen::STLPointId(1); }
|
|
template<>
|
|
constexpr netgen::STLTrigId IndexBASE<netgen::STLTrigId> () { return netgen::STLTrigId(1); }
|
|
}
|
|
|
|
|
|
|
|
namespace netgen {
|
|
|
|
|
|
// triangle structure for loading stl files
|
|
class STLReadTriangle
|
|
{
|
|
Vec<3> normal;
|
|
Point<3> pts[3];
|
|
public:
|
|
STLReadTriangle (const Point<3> * apts, const Vec<3> & anormal);
|
|
STLReadTriangle () {};
|
|
const Point<3> & operator[] (int i) const { return pts[i]; }
|
|
const Vec<3> & Normal() const { return normal; }
|
|
};
|
|
|
|
|
|
|
|
class STLTriangle
|
|
{
|
|
// topology edges of triangle, edge[i] opposite to point[i]
|
|
int topedges[3];
|
|
// neighbour triangles, trig[i] opposite to point[i]
|
|
int nbtrigs[2][3];
|
|
// normalized stored normal vector ??
|
|
Vec<3> normal;
|
|
// point numbers of triangle
|
|
STLPointId pts[3];
|
|
// front-side and back-side domains
|
|
int domains[2];
|
|
|
|
|
|
public:
|
|
|
|
Box<3> box;
|
|
Point<3> center;
|
|
double rad;
|
|
int facenum;
|
|
|
|
struct
|
|
{
|
|
unsigned int toperror : 1;
|
|
} flags;
|
|
|
|
|
|
|
|
|
|
STLTriangle (const STLPointId * apts);
|
|
STLTriangle () {pts[0]=0;pts[1]=0;pts[2]=0;}
|
|
|
|
void DoArchive(Archive& ar)
|
|
{
|
|
ar.Do(&topedges[0],3);
|
|
ar.Do(&nbtrigs[0][0], 6);
|
|
// ar.Do(&pts[0],3);
|
|
ar & pts[0] & pts[1] & pts[2];
|
|
ar.Do(&domains[0],2);
|
|
size_t i = flags.toperror;
|
|
ar & normal & box & center & rad & facenum & i;
|
|
flags.toperror = i;
|
|
}
|
|
|
|
STLPointId operator[] (int i) const { return pts[i]; }
|
|
STLPointId & operator[] (int i) { return pts[i]; }
|
|
|
|
int EdgeNum(int i) const { return topedges[(i-1)]; }
|
|
int & EdgeNum(int i) { return topedges[(i-1)]; }
|
|
|
|
int NBTrig (bool side, int i) const { return nbtrigs[side][i]; }
|
|
int & NBTrig (bool side, int i) { return nbtrigs[side][i]; }
|
|
|
|
|
|
int Domain (bool side) const { return domains[side]; }
|
|
int & Domain (bool side) { return domains[side]; }
|
|
|
|
|
|
|
|
// obsolete:
|
|
STLPointId PNum(int i) const { return pts[(i-1)]; }
|
|
STLPointId & PNum(int i) { return pts[(i-1)]; }
|
|
STLPointId PNumMod(int i) const { return pts[(i-1)%3]; }
|
|
STLPointId & PNumMod(int i) { return pts[(i-1)%3]; }
|
|
|
|
int EdgeNumMod(int i) const { return topedges[(i-1)%3]; }
|
|
int & EdgeNumMod(int i) { return topedges[(i-1)%3]; }
|
|
|
|
int NBTrigNum(int i) const { return nbtrigs[0][(i-1)]; }
|
|
int & NBTrigNum(int i) { return nbtrigs[0][(i-1)]; }
|
|
int NBTrigNumMod(int i) const { return nbtrigs[0][(i-1)%3]; }
|
|
int & NBTrigNumMod(int i) { return nbtrigs[0][(i-1)%3]; }
|
|
|
|
|
|
// consistently oriented neighbour:
|
|
int IsNeighbourFrom(const STLTriangle& t) const;
|
|
// opposite to consistently oriented neighbour:
|
|
int IsWrongNeighbourFrom(const STLTriangle& t) const;
|
|
|
|
///Get the two points of neighbour-Triangles in orientation of this-Triangle
|
|
void GetNeighbourPoints(const STLTriangle& t, STLPointId & p1, STLPointId & p2) const;
|
|
int GetNeighbourPointsAndOpposite(const STLTriangle& t, STLPointId & p1, STLPointId & p2, STLPointId & po) const;
|
|
|
|
|
|
|
|
// NON-normalized geometry - normal vector
|
|
Vec<3> GeomNormal(const Array<Point<3>,STLPointId>& ap) const;
|
|
|
|
// Stored normal vector, normalized
|
|
void SetNormal (const Vec<3> & n);
|
|
const Vec<3> & Normal () const { return normal; }
|
|
|
|
|
|
void ChangeOrientation();
|
|
|
|
//project with a certain normal vector in plane
|
|
void ProjectInPlain(const Array<Point<3>, STLPointId>& ap,
|
|
const Vec<3> & n, Point<3> & pp) const;
|
|
//project with the triangle's normal vector in plane
|
|
void ProjectInPlain(const Array<Point<3>, STLPointId> & ap, Point<3> & pp) const;
|
|
|
|
|
|
/*
|
|
Project the point pp along the nproj into the plane of
|
|
the triangle. The triangle normal is given by ntrig to
|
|
avoid numerical instabilities.
|
|
The local coordinates lam are defined by
|
|
|
|
pp(input) = P1 + lam1 v1 + lam2 v2 + lam3 n
|
|
|
|
the result is
|
|
|
|
pp(output) = P1 + lam1 v1 + lam2 v2
|
|
*/
|
|
int ProjectInPlain (const Array<Point<3>,STLPointId>& ap,
|
|
const Vec<3> & nproj,
|
|
Point<3> & pp, Vec<3> & lam) const;
|
|
|
|
bool PointInside(const Array<Point<3>,STLPointId>& ap, const Point<3> & pp) const;
|
|
|
|
//get nearest point on triangle and distance to it
|
|
double GetNearestPoint(const Array<Point<3>,STLPointId>& ap,
|
|
Point<3> & p3d) const;
|
|
|
|
double Area(const Array<Point<3>,STLPointId>& ap) const;
|
|
|
|
double MinHeight(const Array<Point<3>,STLPointId>& ap) const;
|
|
double MaxLength(const Array<Point<3>,STLPointId>& ap) const;
|
|
//max length of a side of triangle
|
|
|
|
int GetFaceNum() {return facenum;}
|
|
void SetFaceNum(int i) {facenum = i;}
|
|
|
|
bool HasEdge(STLPointId p1, STLPointId p2) const;
|
|
};
|
|
|
|
|
|
/**
|
|
Topology Edge:
|
|
Useful unside a face.
|
|
A edges sharing more than 2 faces: trigs are undefined
|
|
*/
|
|
class STLTopEdge
|
|
{
|
|
STLPointId pts[2];
|
|
int trigs[2];
|
|
double cosangle;
|
|
int status; // excluded, confirmed, candidate, undefined
|
|
public:
|
|
STLTopEdge ();
|
|
STLTopEdge (STLPointId p1, STLPointId p2, int trig1, int trig2);
|
|
|
|
STLPointId operator[] (int i) const { return pts[i]; }
|
|
STLPointId & operator[] (int i) { return pts[i]; }
|
|
|
|
|
|
STLPointId PNum(int i) const { return pts[(i-1)]; }
|
|
STLPointId & PNum(int i) { return pts[(i-1)]; }
|
|
STLPointId PNumMod(int i) const { return pts[(i-1)%2]; }
|
|
STLPointId & PNumMod(int i) { return pts[(i-1)%2]; }
|
|
|
|
int TrigNum(int i) const { return trigs[(i-1)]; }
|
|
int & TrigNum(int i) { return trigs[(i-1)]; }
|
|
int TrigNumMod(int i) const { return trigs[(i-1)%2]; }
|
|
int & TrigNumMod(int i) { return trigs[(i-1)%2]; }
|
|
|
|
void SetCosAngle (double ca) { cosangle = ca; }
|
|
double CosAngle () const { return cosangle; }
|
|
double Angle () const { return acos (cosangle); }
|
|
|
|
void SetStatus (int stat) { status = stat; }
|
|
int GetStatus () const { return status; }
|
|
};
|
|
|
|
|
|
|
|
ostream& operator<<(ostream& os, const STLTriangle& t);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class STLTopology
|
|
{
|
|
protected:
|
|
Array<STLTriangle, STLTrigId> trias;
|
|
NgArray<STLTopEdge> topedges;
|
|
Array<Point<3>, STLPointId> points;
|
|
|
|
// mapping of sorted pair of points to topedge
|
|
INDEX_2_HASHTABLE<int> * ht_topedges;
|
|
// mapping of node to trigs
|
|
TABLE<int, IndexBASE<STLPointId>()> trigsperpoint;
|
|
// mapping of node to edges
|
|
TABLE<int> topedgesperpoint;
|
|
|
|
// searchtree for trigs and points
|
|
|
|
BoxTree<3> * searchtree; // ADT
|
|
Point3dTree * pointtree;
|
|
|
|
Box<3> boundingbox;
|
|
double pointtol;
|
|
|
|
public:
|
|
enum STL_GEOM_STATUS { STL_GOOD, STL_WARNING, STL_ERROR };
|
|
|
|
protected:
|
|
STL_GEOM_STATUS status;
|
|
string statustext;
|
|
|
|
bool topology_ok;
|
|
bool orientation_ok;
|
|
|
|
public:
|
|
STLTopology();
|
|
virtual ~STLTopology();
|
|
|
|
static STLGeometry * LoadNaomi (istream & ist);
|
|
static STLGeometry * Load (istream & ist);
|
|
static STLGeometry * LoadBinary (istream & ist);
|
|
|
|
void Save (const char* filename) const;
|
|
void SaveBinary (const char* filename, const char* aname) const;
|
|
void SaveSTLE (const char * filename) const; // stores trigs and edges
|
|
|
|
virtual void DoArchive(Archive& ar)
|
|
{
|
|
ar & trias & points & boundingbox & pointtol;
|
|
if(ar.Input())
|
|
FindNeighbourTrigs();
|
|
}
|
|
|
|
virtual void InitSTLGeometry (const NgArray<STLReadTriangle> & readtrigs);
|
|
|
|
virtual void TopologyChanged() {}; //do some things, if topology changed!
|
|
|
|
/// Generate topology tables
|
|
void FindNeighbourTrigs();
|
|
|
|
|
|
void GetTrianglesInBox (const Box<3> & box,
|
|
NgArray<int> & trias) const;
|
|
|
|
|
|
int GetNP() const { return points.Size(); }
|
|
int AddPoint(const Point<3> & p) { points.Append(p); return points.Size(); }
|
|
const Point<3> & GetPoint(int nr) const { return points[nr]; } // .Get(nr); }
|
|
int GetPointNum (const Point<3> & p);
|
|
void SetPoint(int nr, const Point<3> & p) { points[nr] = p; } // { points.Elem(nr) = p; }
|
|
auto & GetPoints() const { return points; }
|
|
|
|
const Point<3> & operator[] (STLPointId i) const { return points[i]; }
|
|
Point<3> & operator[] (STLPointId i) { return points[i]; }
|
|
|
|
|
|
|
|
|
|
int GetNT() const { return trias.Size(); }
|
|
void AddTriangle(const STLTriangle& t);
|
|
const STLTriangle & GetTriangle (int nr) const { return trias[nr]; } // .Get(nr); }
|
|
STLTriangle & GetTriangle (int nr) { return trias[nr]; } // .Elem(nr); }
|
|
|
|
const STLTriangle & operator[] (STLTrigId i) const { return trias[i]; }
|
|
STLTriangle & operator[] (STLTrigId i) { return trias[i]; }
|
|
|
|
|
|
int GetNTE() const { return topedges.Size(); }
|
|
const STLTopEdge & GetTopEdge (int nr) const { return topedges.Get(nr); }
|
|
STLTopEdge & GetTopEdge (int nr) { return topedges.Elem(nr); }
|
|
int GetTopEdgeNum (int pi1, int pi2) const;
|
|
|
|
|
|
int NOTrigsPerPoint(int pn) { return trigsperpoint.EntrySize(pn); }
|
|
int TrigPerPoint(int pn, int i) { return trigsperpoint.Get(pn, i); }
|
|
|
|
|
|
int NTopEdgesPerPoint (int pn) const { return topedgesperpoint.EntrySize(pn); }
|
|
int TopEdgePerPoint (int pn, int ei) const { return topedgesperpoint.Get(pn, ei); }
|
|
|
|
|
|
bool Topology_Ok() const { return topology_ok; }
|
|
bool Orientation_Ok() const { return orientation_ok; }
|
|
|
|
STL_GEOM_STATUS GetStatus () const { return status; }
|
|
const string & GetStatusText () const { return statustext; }
|
|
|
|
DLL_HEADER void InvertTrig (int trig);
|
|
DLL_HEADER void DeleteTrig (int trig);
|
|
DLL_HEADER void OrientAfterTrig (int trig);
|
|
|
|
|
|
// Table will be constructed, if topology is not ok
|
|
/// neighbourtrigs for surfacetrigs
|
|
TABLE<int> neighbourtrigs;
|
|
|
|
/// get nr-th neighbour Triangle for triangle trig
|
|
int NONeighbourTrigs(int trig) const { return neighbourtrigs.EntrySize(trig); }
|
|
int NeighbourTrig(int trig, int nr) const { return neighbourtrigs.Get(trig,nr); }
|
|
int NeighbourTrigSorted(int trig, int nr) const;
|
|
void AddNeighbourTrig(int i, int nt) { neighbourtrigs.Add1(i, nt); }
|
|
|
|
|
|
|
|
|
|
int GetLeftTrig (int p1, int p2) const;
|
|
int GetRightTrig (int p1, int p2) const;
|
|
|
|
const Box<3> & GetBoundingBox () const { return boundingbox; }
|
|
};
|
|
|
|
} // namespace netgen
|
|
|
|
#endif
|