/*****************************************************************************
* Filter to convert IRIT data files to SGI's Inventor ascii file format.     *
******************************************************************************
* (C) Gershon Elber, Technion, Israel Institute of Technology                *
******************************************************************************
* Written by:  Gershon Elber				Ver 1.0, May 1994    *
*****************************************************************************/

#include <stdio.h>
#include <math.h>
#include <string.h>
#include "irit_sm.h"
#include "iritprsr.h"
#include "allocate.h"
#include "attribut.h"
#include "iritgrap.h"
#include "geomat3d.h"
#include "getarg.h"
#include "genmat.h"
#include "ffcnvrt.h"
#include "ip_cnvrt.h"

#define SIZE_EPSILON	1e-5

#ifdef NO_CONCAT_STR
static char *VersionStr =
	"Irit2Iv		Version 6.0,	Gershon Elber,\n\
	 (C) Copyright 1989/90-95 Gershon Elber, Non commercial use only.";
#else
static char *VersionStr = "Irit2Iv	" VERSION ",	Gershon Elber,	"
	__DATE__ ",   " __TIME__ "\n" COPYRIGHT ", Non commercial use only.";
#endif /* NO_CONCAT_STR */

static char
#ifdef DOUBLE
    *CtrlStr = "irit2Iv l%- 4%- P%- F%-PolyOpti|FineNess!d!F f%-PolyOpti|SampPerCrv!d!d T%- z%- DFiles!*s";
#else
    *CtrlStr = "irit2Iv l%- 4%- P%- F%-PolyOpti|FineNess!d!f f%-PolyOpti|SampPerCrv!d!d T%- z%- DFiles!*s";
#endif /* DOUBLE */

static int
    GlblPolygonizeFreeForm = FALSE;

static MatrixType CrntViewMat;			/* This is the current view! */

static void DumpDataForIv(IPObjectStruct *PObjects);
static void DumpOneObject(FILE *f, IPObjectStruct *PObject);
static void DumpOnePolygon(FILE *f, IPPolygonStruct *PPolygon, int IsPolygon);
static void DumpOneCurve(FILE *f, IPObjectStruct *CrvObj);
static void DumpOneSurface(FILE *f, IPObjectStruct *SrfObj);
static void Irit2IvExit(int ExitCode);

/*****************************************************************************
* DESCRIPTION:                                                               M
* Main module of irit2iv - Read command line and do what is needed...	     M
*                                                                            *
* PARAMETERS:                                                                M
*   argc, argv:  Command line.                                               M
*                                                                            *
* RETURN VALUE:                                                              M
*   void                                                                     M
*                                                                            *
* KEYWORDS:                                                                  M
*   main                                                                     M
*****************************************************************************/
void main(int argc, char **argv)
{
    int Error,
	SrfFineNessFlag = FALSE,
	CrvFineNessFlag = FALSE,
	VerFlag = FALSE,
	NumFiles = 0;
    char
	**FileNames = NULL;
    IPObjectStruct *PObjects, *PTmpObjs;

    if ((Error = GAGetArgs(argc, argv, CtrlStr,
			   &FFCState.LinearOnePolyFlag,
			   &FFCState.FourPerFlat,
			   &GlblPolygonizeFreeForm, &SrfFineNessFlag,
			   &FFCState.OptimalPolygons,
			   &FFCState.FineNess, &CrvFineNessFlag,
			   &FFCState.OptimalPolylines,
			   &FFCState.SamplesPerCurve,
			   &FFCState.Talkative, &VerFlag, &NumFiles,
			   &FileNames)) != 0) {
	GAPrintErrMsg(Error);
	GAPrintHowTo(CtrlStr);
	Irit2IvExit(1);
    }

    if (VerFlag) {
	fprintf(stderr, "\n%s\n\n", VersionStr);
	GAPrintHowTo(CtrlStr);
	Irit2IvExit(0);
    }

    if (FFCState.LinearOnePolyFlag) {
	CagdSetLinear2Poly(CAGD_ONE_POLY_PER_COLIN);
    }
    else
        CagdSetLinear2Poly(CAGD_REG_POLY_PER_LIN);

    if (!NumFiles) {
	fprintf(stderr, "No data file names were given, exit.\n");
	GAPrintHowTo(CtrlStr);
	Irit2IvExit(1);
    }

    /* Get the data files: */
    IritPrsrSetFlattenObjects(TRUE);
    if ((PObjects = IritPrsrGetDataFiles(FileNames, NumFiles, TRUE, FALSE)) ==
									NULL)
	Irit2IvExit(1);

    if (IritPrsrWasPrspMat)
	MatMultTwo4by4(CrntViewMat, IritPrsrViewMat, IritPrsrPrspMat);
    else
	GEN_COPY(CrntViewMat, IritPrsrViewMat, sizeof(MatrixType));

    PTmpObjs = PObjects;
    PObjects = GMTransformObjectList(PTmpObjs, CrntViewMat);
    IPFreeObjectList(PTmpObjs);

    DumpDataForIv(PObjects);

    Irit2IvExit(0);
}

/*****************************************************************************
* DESCRIPTION:                                                               *
* Dumps the data for SGI's Inventor formal to stdout.			     *
*                                                                            *
* PARAMETERS:                                                                *
*   PObjects:   To dump into file.                                           *
*                                                                            *
* RETURN VALUE:                                                              *
*   void                                                                     *
*****************************************************************************/
static void DumpDataForIv(IPObjectStruct *PObjects)
{
    FILE
	*f = stdout;	       /* Change it if you want it into "real" file. */
    
    fprintf(f, "#Inventor V1.0 ascii\n\n");
    fprintf(f, "Separator {\n    Group {\n");

    while (PObjects) {
	IPObjectStruct *PObjNext;

	if (GlblPolygonizeFreeForm && IP_IS_FFGEOM_OBJ(PObjects))
	    PObjects = ProcessFreeForm(PObjects, &FFCState);

	DumpOneObject(f, PObjects);

	PObjNext = PObjects -> Pnext;
	IPFreeObject(PObjects);
	PObjects = PObjNext;
    }

    fprintf(f, "    }\n}\n");

    fclose(f);
}

/*****************************************************************************
* DESCRIPTION:                                                               *
* Dumps one object PObject to file f.                                        *
*                                                                            *
* PARAMETERS:                                                                *
*   f:            File to dump object to.                                    *
*   PObject:      Object to dump to file f.                                  *
*                                                                            *
* RETURN VALUE:                                                              *
*   void                                                                     *
*****************************************************************************/
static void DumpOneObject(FILE *f, IPObjectStruct *PObject)
{
    IPPolygonStruct *PList;

    if (!IP_IS_POLY_OBJ(PObject) &&
	!IP_IS_SRF_OBJ(PObject) &&
	!IP_IS_CRV_OBJ(PObject))
	return;

    fprintf(f, "\tSeparator {\n");
    if (strlen(PObject -> Name) > 0) {
	fprintf(f, "\t    Label {\n\t\tlabel \"%s\"\n\t    }\n",
		PObject -> Name);
    }
    fprintf(f, "\t    Group {\n");

    switch (PObject -> ObjType) {
	case IP_OBJ_POLY:
	    for (PList = PObject -> U.Pl;
		 PList != NULL;
		 PList = PList -> Pnext)
		DumpOnePolygon(f, PList, IP_IS_POLYGON_OBJ(PObject));
	    break;
	case IP_OBJ_CURVE:
	    DumpOneCurve(f, PObject);
	    break;
	case IP_OBJ_SURFACE:
	    DumpOneSurface(f, PObject);
	    break;
	default:
	    break;
    }

    fprintf(f, "\t    }\n\t}\n");
}

/*****************************************************************************
* DESCRIPTION:                                                               *
* Dumps one polygon, using global Matrix transform CrntViewMat.		     *
*                                                                            *
* PARAMETERS:                                                                *
*   f:            File to dump polygon to.  		                     *
*   PPolygon:     Polygon to dump to file f.                                 *
*   IsPolygon:    Is it a polygon or a polyline?                             *
*                                                                            *
* RETURN VALUE:                                                              *
*   void		                                                     *
*****************************************************************************/
static void DumpOnePolygon(FILE *f, IPPolygonStruct *PPolygon, int IsPolygon)
{
    IPVertexStruct *V,
	*VList = PPolygon -> PVertex;

    if (VList == NULL)
	return;

    if (IsPolygon) {
	int i, NumVrt;

	fprintf(f, "\t\tSeparator {\n\t\t    Coordinate3 {\n\t\t\tpoint [ ");
	for (V = VList, NumVrt = 0; V != NULL; V = V -> Pnext, NumVrt++) {
	    fprintf(f, "%.7g %.7g %.7g",
		    V -> Coord[0], V -> Coord[1], V -> Coord[2]);
	    if (V -> Pnext != NULL)
		fprintf(f, ",\n\t\t\t\t");
	    else
		fprintf(f, " ]\n");
	}
	fprintf(f, "\t\t    }\n");

	fprintf(f, "\n\t\t    Normal {\n\t\t\tvector [ ");
	for (V = VList; V != NULL; V = V -> Pnext) {
	    fprintf(f, "%.7g %.7g %.7g",
		    -V -> Normal[0], -V -> Normal[1], -V -> Normal[2]);
	    if (V -> Pnext != NULL)
		fprintf(f, ",\n\t\t\t\t");
	    else
		fprintf(f, " ]\n");
	}
	fprintf(f, "\t\t    }\n");

	fprintf(f, "\n\t\t    IndexedFaceSet {\n\t\t\tcoordIndex [ ");
	for (i = 0; i < NumVrt; i++)
	    fprintf(f, "%d, ", i);
	fprintf(f, "-1 ]\n\t\t    }\n\t\t}\n");
    }
}

/*****************************************************************************
* DESCRIPTION:                                                               *
* Dumps one curve.                                                           *
*                                                                            *
* PARAMETERS:                                                                *
*   f:            File to dump object to.                                    *
*   CrvObj:	  Curve to dump to file f.                                   *
*                                                                            *
* RETURN VALUE:                                                              *
*   void                                                                     *
*****************************************************************************/
static void DumpOneCurve(FILE *f, IPObjectStruct *CrvObj)
{
    int i,
	NewCrv = FALSE;
    CagdCrvStruct
	*Crv = CrvObj -> U.Crvs;
    CagdRType
	**Points = Crv -> Points;

    if (Crv -> GType == CAGD_CBEZIER_TYPE) {
	Crv = CnvrtBezier2BsplineCrv(Crv);
	NewCrv = TRUE;
    }

    if (CAGD_IS_RATIONAL_CRV(Crv)) {
	fprintf(f, "\t\tSeparator {\n\t\t    Coordinate4 {\n\t\t\tpoint [ ");
    
	for (i = 0; i < Crv -> Length; i++) {
	    fprintf(f, "%.7g %.7g %.7g %.7g",
		    Points[1] ? Points[1][i] : 0.0,
		    Points[2] ? Points[2][i] : 0.0,
		    Points[3] ? Points[3][i] : 0.0,
		    Points[0] ? Points[0][i] : 1.0);
	    if (i < Crv -> Length - 1)
		fprintf(f, ",\n\t\t\t\t");
	    else
		fprintf(f, " ]\n");
	}
    }
    else {
	fprintf(f, "\t\tSeparator {\n\t\t    Coordinate3 {\n\t\t\tpoint [ ");
    
	for (i = 0; i < Crv -> Length; i++) {
	    fprintf(f, "%.7g %.7g %.7g",
		    Points[1] ? Points[1][i] : 0.0,
		    Points[2] ? Points[2][i] : 0.0,
		    Points[3] ? Points[3][i] : 0.0);
	    if (i < Crv -> Length - 1)
		fprintf(f, ",\n\t\t\t\t");
	    else
		fprintf(f, " ]\n");
	}
    }
    fprintf(f, "\t\t    }\n");

    fprintf(f, "\t\t    NurbsCurve {\n");
    fprintf(f, "\t\t\tnumControlPoints %d\n", Crv -> Length);
    fprintf(f, "\t\t\tknotVector	[ ");
    for (i = 0; i < Crv -> Length + Crv -> Order; i++) {
	if (i > 0 && i % 5 == 0)
	    fprintf(f, "\n\t\t\t\t");
	fprintf(f, "%.7g%s", Crv -> KnotVector[i], 
		i == Crv -> Length + Crv -> Order - 1 ? " ]\n" : ", ");
    }

    fprintf(f, "\t\t    }\n\t\t}\n");

    if (NewCrv)
	CagdCrvFree(Crv);
}

/*****************************************************************************
* DESCRIPTION:                                                               *
* Dumps one surface.                                                         *
*                                                                            *
* PARAMETERS:                                                                *
*   f:            File to dump object to.                                    *
*   SrfObj:	  Surface to dump to file f.                                 *
*                                                                            *
* RETURN VALUE:                                                              *
*   void                                                                     *
*****************************************************************************/
static void DumpOneSurface(FILE *f, IPObjectStruct *SrfObj)
{
    int i,
	NewSrf = FALSE;
    CagdSrfStruct
	*Srf = SrfObj -> U.Srfs;
    CagdRType
	**Points = Srf -> Points;

    if (Srf -> GType == CAGD_SBEZIER_TYPE) {
	Srf = CnvrtBezier2BsplineSrf(Srf);
	NewSrf = TRUE;
    }

    if (CAGD_IS_RATIONAL_SRF(Srf)) {
	fprintf(f, "\t\tSeparator {\n\t\t    Coordinate4 {\n\t\t\tpoint [ ");
    
	for (i = 0; i < Srf -> ULength * Srf -> VLength; i++) {
	    fprintf(f, "%.7g %.7g %.7g %.7g",
		    Points[1] ? Points[1][i] : 0.0,
		    Points[2] ? Points[2][i] : 0.0,
		    Points[3] ? Points[3][i] : 0.0,
		    Points[0] ? Points[0][i] : 1.0);
	    if (i < Srf -> ULength * Srf -> VLength - 1)
		fprintf(f, ",\n\t\t\t\t");
	    else
		fprintf(f, " ]\n");
	}
    }
    else {
	fprintf(f, "\t\tSeparator {\n\t\t    Coordinate3 {\n\t\t\tpoint [ ");
    
	for (i = 0; i < Srf -> ULength * Srf -> VLength; i++) {
	    fprintf(f, "%.7g %.7g %.7g",
		    Points[1] ? Points[1][i] : 0.0,
		    Points[2] ? Points[2][i] : 0.0,
		    Points[3] ? Points[3][i] : 0.0);
	    if (i < Srf -> ULength * Srf -> VLength - 1)
		fprintf(f, ",\n\t\t\t\t");
	    else
		fprintf(f, " ]\n");
	}
    }
    fprintf(f, "\t\t    }\n");

    fprintf(f, "\t\t    NurbsSurface {\n");
    fprintf(f, "\t\t\tnumUControlPoints %d\n", Srf -> ULength);
    fprintf(f, "\t\t\tnumVControlPoints %d\n", Srf -> VLength);
    fprintf(f, "\t\t\tuKnotVector	[ ");
    for (i = 0; i < Srf -> ULength + Srf -> UOrder; i++) {
	if (i > 0 && i % 5 == 0)
	    fprintf(f, "\n\t\t\t\t");
	fprintf(f, "%g%s", Srf -> UKnotVector[i], 
		i == Srf -> ULength + Srf -> UOrder - 1 ? " ]\n" : ", ");
    }
    fprintf(f, "\t\t\tvKnotVector	[ ");
    for (i = 0; i < Srf -> VLength + Srf -> VOrder; i++) {
	if (i > 0 && i % 5 == 0)
	    fprintf(f, "\n\t\t\t\t");
	fprintf(f, "%g%s", Srf -> VKnotVector[i], 
		i == Srf -> VLength + Srf -> VOrder - 1 ? " ]\n" : ", ");
    }

    fprintf(f, "\t\t    }\n\t\t}\n");

    if (NewSrf)
	CagdSrfFree(Srf);
}

/*****************************************************************************
* DESCRIPTION:                                                               *
* Irit2Iv exit routine.							     *
*                                                                            *
* PARAMETERS:                                                                *
*   ExitCode:                                                                *
*                                                                            *
* RETURN VALUE:                                                              *
*   void                                                                     *
*****************************************************************************/
static void Irit2IvExit(int ExitCode)
{
    exit(ExitCode);
}

#ifdef DEBUG

/*****************************************************************************
* DESCRIPTION:                                                               *
*    Dummy function to link at debugging time.                               *
*                                                                            *
* PARAMETERS:                                                                *
*                                                                            *
* RETURN VALUE:                                                              *
*   void                                                                     *
*                                                                            *
* KEYWORDS:                                                                  *
*****************************************************************************/
void DummyLinkCagdDebug(void)
{
    IritPrsrDbg();
}

#endif /* DEBUG */