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added line cleaning to eliminate all separators, added a rough triangulation scheme.

This commit is contained in:
Marco Callieri 2005-05-09 12:29:55 +00:00
parent 542425bb80
commit fc20ce261c
1 changed files with 165 additions and 42 deletions
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163
wrap/io_trimesh/import_raw.h
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@ -25,6 +25,9 @@
History
$Log: not supported by cvs2svn $
Revision 1.1 2005/05/06 13:58:26 callieri
First working version (callieri)
****************************************************************************/
@ -60,11 +63,15 @@ typedef typename MESH_TYPE::FaceIterator FaceIterator;
enum RAWError {
E_NOERROR, // 0
// Errori di open
// Error open
E_CANTOPEN, // 1
E_UNESPECTEDEOF, // 2
// errore line descriptor
E_INVALIDLINEDESC // 3
// error line descriptor
E_INVALIDLINEDESC, // 3
// error line parsing
E_LINEERROR, // 4
// wrong number of points
E_WRONGPOINTNUM // 5
};
static const char *ErrorMsg(int error)
@ -75,6 +82,8 @@ static const char *ErrorMsg(int error)
"Can't open file",
"Premature End of file",
"Invalid line Descriptor",
"Error parsing a line",
"Point number different from expected"
};
if(error>2 || error<0) return "Unknown error";
@ -169,6 +178,68 @@ static void Skipline(FILE *fp)
fread(&(buf),sizeof(char),1,fp);
}
// function to parse the line read from the raw file
// all characters besides numerals,dot,minus,plus
// if e is found between numbers it's ketpt (12e4)
static int Parseline(int tokennumber, int *tokenorder, char *rawline, float *linebuffer)
{
int linelen;
int ii;
bool change;
int foundtok;
// length
linelen = strlen(rawline);
// cleaning the line
for(ii=0;ii<(linelen-1);)
{
change = true;
if(isdigit(rawline[ii])) // is a number
change = false;
else if(rawline[ii]==' ') // is a space
change = false;
else if((rawline[ii]=='-') || (rawline[ii]=='+') || (rawline[ii]=='-') || (rawline[ii]=='.')) // is + - .
change = false;
else if(rawline[ii]=='e') // is e... is perhaps an exponential ?
{
if((ii>0) || (ii<(linelen-2))) // if it's at the begin or the end of line, it's not an exponential
if(isdigit(rawline[ii-1])) // a number before it
if(isdigit(rawline[ii+1]) || (rawline[ii+1]=='+') || (rawline[ii+1]=='-')) // after it a number a plus or a minus
change = false;
}
if(change)
rawline[ii++] = ' '; // then change it to ' '
else
ii++;
}
rawline[linelen] = '\0';
// now parsing the line
foundtok = 0;
ii = 0;
while((foundtok<tokennumber)&&(ii<linelen))
{
//find the next token begin
while(rawline[ii] == ' ')
ii++;
foundtok++;
sscanf(&(rawline[ii]),"%f", &(linebuffer[tokenorder[foundtok-1]]));
// going after the token
while((rawline[ii] != ' ')&&(rawline[ii] != '\0'))
ii++;
}
if(foundtok<tokennumber)
return E_LINEERROR;
else
return E_NOERROR;
}
/*!
@ -180,31 +251,20 @@ static void Skipline(FILE *fp)
* \return the operation result
*/
static int Open( MESH_TYPE &m, const char * filename, bool triangulate=false, int lineskip = 0, const char * linedesc = "PX PY PZ")
{
if(triangulate)
return Opentriang( m, filename, lineskip, linedesc);
else
return Openpoints( m, filename, lineskip, linedesc);
}
// in raw files with indication of rows and columns
static int Opentriang( MESH_TYPE &m, const char * filename, int lineskip = 0, const char * linedesc = "PX PY PZ")
{
return E_NOERROR;
}
// generic raw reader, only points are imported
static int Openpoints( MESH_TYPE &m, const char * filename, int lineskip = 0, const char * linedesc = "PX PY PZ")
{
int ii;
int ret;
FILE *fp;
int rownumber;
int colnumber;
// line description
int tokennumber;
int tokenorder[RAW_MAX_TOKEN_LINE_DESCRIPTOR];
// line read from file, to be parsed
char rawline[512];
//line data buffer
float linebuffer[10];
// fill buffer with standard values
@ -224,6 +284,14 @@ static int Openpoints( MESH_TYPE &m, const char * filename, int lineskip = 0, co
for(ii=0; ii<lineskip; ii++)
Skipline(fp);
// in raw files with indication of rows and columns it's also possible to triangulate points
// after the skipped lines there should be the number of row and columns
if(triangulate)
{
fscanf(fp,"%i", &(rownumber));
fscanf(fp,"%i\n", &(colnumber));
}
// parsing line description
ret = Parselinedescription(linedesc, tokennumber, tokenorder);
if(ret)
@ -235,12 +303,29 @@ static int Openpoints( MESH_TYPE &m, const char * filename, int lineskip = 0, co
while(!feof(fp))
{
/**/
//read a new line
ii=0;
fread(&(rawline[ii++]),sizeof(char),1,fp);
while(rawline[ii-1] != '\n')
fread(&(rawline[ii++]),sizeof(char),1,fp);
rawline[ii-1] = '\0';
if(strlen(rawline) >0) // empty line, just skip
{
ret = Parseline(tokennumber, tokenorder, rawline, linebuffer);
if(ret)
return ret;
/*
// old code reading directly fom file stream
for(ii=0; ii<tokennumber; ii++)
fscanf(fp,"%f", &(linebuffer[tokenorder[ii]]));
*/
// new vertex
VertexType nv;
//nv.Supervisor_Flags() = 0;
// store the position
nv.P()[0] = linebuffer[0]; nv.P()[1] = linebuffer[1]; nv.P()[2] = linebuffer[2];
@ -263,11 +348,49 @@ static int Openpoints( MESH_TYPE &m, const char * filename, int lineskip = 0, co
}
m.vert.push_back(nv);
} // end if zero length
}
// update model point number
m.vn = m.vert.size();
// now generate the triangles
if(triangulate)
{
int rr,cc;
if(m.vn != (rownumber * colnumber))
return E_WRONGPOINTNUM;
int trinum = (rownumber-1) * (colnumber-1) * 2;
FaceIterator fi=Allocator<MESH_TYPE>::AddFaces(m,trinum);
m.fn = 0;
for(rr=0; rr<rownumber-1; rr++)
for(cc=0; cc<colnumber-1; cc++)
{
// upper tri
(*fi).V(0) = &(m.vert[(rr ) + ((cc ) * rownumber)]);
(*fi).V(1) = &(m.vert[(rr+1) + ((cc ) * rownumber)]);
(*fi).V(2) = &(m.vert[(rr ) + ((cc+1) * rownumber)]);
m.fn++;
fi++;
// lower tri
(*fi).V(0) = &(m.vert[(rr+1) + ((cc ) * rownumber)]);
(*fi).V(1) = &(m.vert[(rr+1) + ((cc+1) * rownumber)]);
(*fi).V(2) = &(m.vert[(rr ) + ((cc+1) * rownumber)]);
/**/
m.fn++;
fi++;
}
++fi;
}
fclose(fp);
return E_NOERROR;
}