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BSP_WRT.C
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C/C++ Source or Header
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1991-05-18
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6KB
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204 lines
/******************************************************************************
* Bsp-Wrt.c - Bspline handling routines - write to file. *
*******************************************************************************
* Written by Gershon Elber, Aug. 90. *
******************************************************************************/
#ifdef __MSDOS__
#include <stdlib.h>
#endif /* __MSDOS__ */
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include "cagd_loc.h"
/******************************************************************************
* Writes a bspline curve(s) list into file. Returns TRUE if succesful, FALSE *
* otherwise. *
* If Comment is NULL, no comment is printed, if "" only internal coment. *
******************************************************************************/
int BspCrvWriteToFile(CagdCrvStruct *Crvs, char *FileName, int Indent,
char *Comment, char **ErrStr)
{
int i;
FILE *f;
if ((f = fopen(FileName, "w")) == NULL) {
*ErrStr = "Fail to open file";
return FALSE;
}
i = BspCrvWriteToFile2(Crvs, f, Indent, Comment, ErrStr);
fclose(f);
return i;
}
/******************************************************************************
* Writes a bspline curve(s) list into file. Returns TRUE if succesful, FALSE *
* otherwise. The file is not closed. *
* If Comment is NULL, no comment is printed, if "" only internal coment. *
******************************************************************************/
int BspCrvWriteToFile2(CagdCrvStruct *Crvs, FILE *f, int Indent, char *Comment,
char **ErrStr)
{
int i, j, Len, MaxCoord;
if (Comment != NULL) {
_CagdFprintf(f, Indent, "#\n");
_CagdFprintf(f, Indent, "# cagd_lib - bspline curve(s) dump.\n");
_CagdFprintf(f, Indent, "#\n");
_CagdFprintf(f, Indent, "# %s\n", Comment);
_CagdFprintf(f, Indent, "#\n");
}
*ErrStr = NULL;
while (Crvs) {
MaxCoord = CAGD_NUM_OF_PT_COORD(Crvs -> PType);
if (Crvs -> GType != CAGD_CBSPLINE_TYPE) {
*ErrStr = "Given curve(s) is (are) not Bspline curve(s)";
break;
}
_CagdFprintf(f, Indent, "[CURVE BSPLINE %d %d %c%c\n",
Crvs -> Length, Crvs -> Order,
CAGD_IS_RATIONAL_PT(Crvs -> PType) ? 'P' : 'E',
MaxCoord + '0');
Indent += 4;
/* Put out the knot vectors: */
_CagdFprintf(f, Indent, "[KV");
Len = Crvs -> Order + Crvs -> Length;
for (i = 0; i < Len; i++) {
_CagdFprintf(f, 0, " %s", _CagdReal2Str(Crvs -> KnotVector[i]));
if (i && i % 8 == 0) {
_CagdFprintf(f, 0, "\n");
_CagdFprintf(f, Indent + 3, "");
}
}
_CagdFprintf(f, 0, "]\n");
/* Put out the control polygon. */
for (i = 0; i < Crvs -> Length; i++) {
_CagdFprintf(f, Indent, "[");
if (CAGD_IS_RATIONAL_PT(Crvs -> PType))
_CagdFprintf(f, 0, "%s ", _CagdReal2Str(Crvs -> Points[0][i]));
for (j = 1; j <= MaxCoord; j++) {
_CagdFprintf(f, 0, "%s", _CagdReal2Str(Crvs -> Points[j][i]));
if (j < MaxCoord) _CagdFprintf(f, 0, " ");
}
_CagdFprintf(f, 0, "]\n");
}
Indent -= 4;
_CagdFprintf(f, Indent, "]\n\n");
Crvs = Crvs -> Pnext;
}
return *ErrStr == NULL;
}
/******************************************************************************
* Writes a bspline curve(s) list into file. Returns TRUE if succesful, FALSE *
* otherwise. *
******************************************************************************/
int BspSrfWriteToFile(CagdSrfStruct *Srfs, char *FileName, int Indent,
char *Comment, char **ErrStr)
{
int i;
FILE *f;
if ((f = fopen(FileName, "w")) == NULL) {
*ErrStr = "Fail to open file";
return FALSE;
}
i = BspSrfWriteToFile2(Srfs, f, Indent, Comment, ErrStr);
fclose(f);
return i;
}
/******************************************************************************
* Writes a bspline curve(s) list into file. Returns TRUE if succesful, FALSE *
* otherwise. The file is not closed. *
******************************************************************************/
int BspSrfWriteToFile2(CagdSrfStruct *Srfs, FILE *f, int Indent, char *Comment,
char **ErrStr)
{
int i, j, Len, MaxCoord;
CagdRType *KnotVector;
if (Comment != NULL) {
_CagdFprintf(f, Indent, "#\n");
_CagdFprintf(f, Indent, "# cagd_lib - bspline Srf(s) dump.\n");
_CagdFprintf(f, Indent, "#\n");
_CagdFprintf(f, Indent, "# %s\n", Comment);
_CagdFprintf(f, Indent, "#\n");
}
*ErrStr = NULL;
while (Srfs) {
MaxCoord = CAGD_NUM_OF_PT_COORD(Srfs -> PType);
if (Srfs -> GType != CAGD_SBSPLINE_TYPE) {
*ErrStr = "Given surface(s) is (are) not bspline surface(s)";
break;
}
_CagdFprintf(f, Indent, "[SURFACE BSPLINE %d %d %d %d %c%c\n",
Srfs -> ULength, Srfs -> VLength,
Srfs -> UOrder, Srfs -> VOrder,
CAGD_IS_RATIONAL_PT(Srfs -> PType) ? 'P' : 'E',
MaxCoord + '0');
Indent += 4;
/* Put out the knot vectors: */
for (i = 0; i < 2; i++) {
if (i == 0) {
KnotVector = Srfs -> UKnotVector;
Len = Srfs -> ULength + Srfs -> UOrder;
}
else {
KnotVector = Srfs -> VKnotVector;
Len = Srfs -> VLength + Srfs -> VOrder;
}
_CagdFprintf(f, Indent, "[KV");
for (j = 0; j < Len; j++) {
_CagdFprintf(f, 0, " %s", _CagdReal2Str(KnotVector[j]));
if (j && j % 8 == 0) {
_CagdFprintf(f, 0, "\n\t\t");
_CagdFprintf(f, Indent + 3, "");
}
}
_CagdFprintf(f, 0, "]\n");
}
/* Put out the control mesh. */
for (i = 0; i < Srfs -> VLength * Srfs -> ULength; i++) {
if (i && i % Srfs -> ULength == 0)
_CagdFprintf(f, 0, "\n"); /* Put empty lines between raws. */
_CagdFprintf(f, Indent, "[");
if (CAGD_IS_RATIONAL_PT(Srfs -> PType))
_CagdFprintf(f, 0, "%s ", _CagdReal2Str(Srfs -> Points[0][i]));
for (j = 1; j <= MaxCoord; j++) {
_CagdFprintf(f, 0, "%s", _CagdReal2Str(Srfs -> Points[j][i]));
if (j < MaxCoord) _CagdFprintf(f, 0, " ");
}
_CagdFprintf(f, 0, "]\n");
}
Indent -= 4;
_CagdFprintf(f, Indent, "]\n\n");
Srfs = Srfs -> Pnext;
}
return *ErrStr == NULL;
}