/*****************************************************************************
* Conversion routines from curves and surfaces to polygons and polylines.    *
******************************************************************************
* (C) Gershon Elber, Technion, Israel Institute of Technology                *
******************************************************************************
* Written by:  Gershon Elber				Ver 1.0, Apr 1992    *
*****************************************************************************/

#ifndef IP_CONVRT_H
#define IP_CONVRT_H

#include "iritprsr.h"
#include "cagd_lib.h"
#include "symb_lib.h"
#include "attribut.h"

typedef struct IPFreeformConvStateStruct {
    int	      Talkative;                      /* If TRUE, be more talkative. */
    int	      DumpObjsAsPolylines;  /* Should we dump polylines or polygons. */
    int	      DrawFFGeom;           /* Should we dump the freeform geometry. */
    int	      DrawFFMesh;         /* Should we dump control polygons/meshes. */
    int       NumOfIsolines[3];    /* isolines for surfaces and trivariates. */
    RealType  CrvApproxTolSamples;        /* Samples/Tolerance of PL approx. */
    SymbCrvApproxMethodType CrvApproxMethod;     /* Piecewise linear approx. */
    int       ShowInternal;       /* Do we display internal polygonal edges? */
    int	      CubicCrvsAprox;	   /* Do curves should be approx. as cubics. */
    RealType  FineNess;         /* Control over the polygonal approximation. */
    int	      ComputeUV;    /* Attach UV attributes to vertices of polygons. */
    int	      ComputeNrml;   /* Attach normal attrs to vertices of polygons. */
    int	      FourPerFlat;          /* Two or four triangles per flat patch. */
    int	      OptimalPolygons;           /* Optimal (or not optimal) approx. */
    int	      BBoxGrid;           /* Compute bbox/grid subdivision for bbox. */
    int	      LinearOnePolyFlag;/* Only one polygonal subdiv. along linears. */
    int	      SrfsToBicubicBzr;      /* Should we convert to bicubic bezier? */
} IPFreeformConvStateStruct;

extern GLOBAL_DATA IPFreeformConvStateStruct IPFFCState;

#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif

/* Lower level functions in ip_cnvrt.c */

IPPolygonStruct *IPCagdPllns2IritPllns(CagdPolylineStruct *Polys);
IPPolygonStruct *IPCagdPlgns2IritPlgns(CagdPolygonStruct *Polys,
				       CagdBType ComputeUV);
IPPolygonStruct *IPCurve2Polylines(CagdCrvStruct *Crv,
				   CagdRType TolSamples,
				   SymbCrvApproxMethodType Method);
CagdCrvStruct *IPPolyline2Curve(IPPolygonStruct *Pl, int Order);
IPPolygonStruct *IPCurve2CtlPoly(CagdCrvStruct *Crv);
IPPolygonStruct *IPSurface2Polylines(CagdSrfStruct *Srf,
				     int NumOfIsolines[2],
				     CagdRType TolSamples,
				     SymbCrvApproxMethodType Method);
IPPolygonStruct *IPSurface2CtlMesh(CagdSrfStruct *Srf);
SymbPlErrorFuncType IPSrf2OptPolysSetUserTolFunc(SymbPlErrorFuncType Func);
int IPSurface2PolygonsGenTriOnly(int OnlyTri);
CagdPlgErrorFuncType IPPolygonSetErrFunc(CagdPlgErrorFuncType Func);
IPPolygonStruct *IPSurface2Polygons(CagdSrfStruct *Srf,
				    int FourPerFlat,
				    RealType FineNess,
				    int ComputeUV,
				    int ComputeNrml,
				    int Optimal);
IPPolygonStruct *IPTrimSrf2Polylines(TrimSrfStruct *TrimSrf,
				     int NumOfIsolines[2],
				     CagdRType TolSamples,
				     SymbCrvApproxMethodType Method,
				     int TrimmingCurves,
				     int IsoParamCurves);
IPPolygonStruct *IPTrimSrf2CtlMesh(TrimSrfStruct *TrimSrf);
IPPolygonStruct *IPTrimSrf2Polygons(TrimSrfStruct *TrimSrf,
				    int FourPerFlat,
				    RealType FineNess,
				    int ComputeUV,
				    int ComputeNrml,
				    int Optimal);
IPPolygonStruct *IPTrivar2Polygons(TrivTVStruct *Trivar,
				   int FourPerFlat,
				   RealType FineNess,
				   int ComputeUV,
				   int ComputeNrml,
				   int Optimal);
IPPolygonStruct *IPTrivar2Polylines(TrivTVStruct *Trivar,
				    int NumOfIsolines[3],
				    CagdRType TolSamples,
				    SymbCrvApproxMethodType Method);
IPPolygonStruct *IPTrivar2CtlMesh(TrivTVStruct *Trivar);
IPPolygonStruct *IPTriSrf2Polygons(TrngTriangSrfStruct *TriSrf,
				   RealType FineNess,
				   int ComputeUV,
				   int ComputeNrml,
				   int Optimal);
IPPolygonStruct *IPTriSrf2Polylines(TrngTriangSrfStruct *TriSrf,
				    int NumOfIsolines[3],
				    CagdRType TolSamples,
				    SymbCrvApproxMethodType Method);
IPPolygonStruct *IPTriSrf2CtlMesh(TrngTriangSrfStruct *TriSrf);
RealType IPSetCurvesToCubicBzrTol(RealType Tolerance);
CagdCrvStruct *IPCurvesToCubicBzrCrvs(CagdCrvStruct *Crvs,
				      IPPolygonStruct **CtlPolys,
				      CagdBType DrawCurve,
				      CagdBType DrawCtlPoly,
				      CagdRType MaxArcLen);
CagdCrvStruct *IPSurfacesToCubicBzrCrvs(CagdSrfStruct *Srfs,
					IPPolygonStruct **CtlMeshes,
					CagdBType DrawSurface,
					CagdBType DrawMesh,
					int NumOfIsolines[2],
					CagdRType MaxArcLen);
CagdCrvStruct *IPTrimSrfsToCubicBzrCrvs(TrimSrfStruct *TrimSrfs,
					IPPolygonStruct **CtlMeshes,
					CagdBType DrawTrimSrf,
					CagdBType DrawMesh,
					int NumOfIsolines[2],
					CagdRType MaxArcLen);
CagdCrvStruct *IPTrivarToCubicBzrCrvs(TrivTVStruct *Trivar,
				      IPPolygonStruct **CtlMeshes,
				      CagdBType DrawTrivar,
				      CagdBType DrawMesh,
				      int NumOfIsolines[2],
				      CagdRType MaxArcLen);
CagdCrvStruct *IPTriSrfsToCubicBzrCrvs(TrngTriangSrfStruct *TriSrfs,
				       IPPolygonStruct **CtlMeshes,
				       CagdBType DrawSurface,
				       CagdBType DrawMesh,
				       int NumOfIsolines[3],
				       CagdRType MaxArcLen);
CagdSrfStruct *IPSurfacesToCubicBzrSrfs(CagdSrfStruct *Srfs,
					CagdSrfStruct **NoConvertionSrfs);
void IPClosedPolysToOpen(IPPolygonStruct *Pls);
void IPOpenPolysToClosed(IPPolygonStruct *Pls);

/* Higher level functions in ff_cnvrt.c */

IPObjectStruct *IPFreeForm2Polylines(IPFreeFormStruct *FreeForms,
				     int Talkative,
				     int DrawGeom,
				     int DrawMesh,
				     int NumOfIsolines[3],
				     CagdRType TolSamples,
				     SymbCrvApproxMethodType Method);
IPObjectStruct *IPFreeForm2CubicBzr(IPFreeFormStruct *FreeForms,
				    int Talkative,
				    int DrawGeom,
				    int DrawMesh,
				    int NumOfIsolines[3],
				    CagdRType TolSamples,
				    SymbCrvApproxMethodType Method);
IPObjectStruct *IPFreeForm2Polygons(IPFreeFormStruct *FreeForms,
				    int Talkative,
				    int FourPerFlat,
				    RealType FineNess,
				    int ComputeUV,
				    int ComputeNrml,
				    int Optimal,
				    int BBoxGrid);
IPObjectStruct *IPConvertFreeForm(IPObjectStruct *PObj,
				  IPFreeformConvStateStruct *State);
void IPMapObjectInPlace(IPObjectStruct *PObj, MatrixType Mat);

#if defined(__cplusplus) || defined(c_plusplus)
}
#endif

#endif /* IP_CONVRT_H */