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/*----------------------------------------------------------------------------*/
/* Includes */
/*----------------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libmeshb7.h>
/*----------------------------------------------------------------------------*/
/* Topologic tables */
/*----------------------------------------------------------------------------*/
int tettvpe[6][2] = { {0,1}, {1,2}, {2,0}, {3,0}, {3,1}, {3,2} };
int tettvpf[4][3] = { {1,2,3}, {2,0,3}, {3,0,1}, {0,2,1} };
int pyrtvpe[8][2] = { {0,1}, {3,2}, {0,3}, {1,2}, {0,4}, {1,4}, {2,4}, {3,4} };
int pyrtvpf[5][4] = { {0,1,4,-1}, {1,2,4,-1}, {2,3,4,-1}, {3,0,4,-1}, {3,2,1,0} };
int pritvpe[9][2] = { {0,1}, {1,2}, {2,0}, {3,4}, {4,5}, {5,3}, {0,3}, {1,4}, {2,5} };
int pritvpf[5][4] = { {3,5,2,0}, {1,2,5,4}, {0,1,4,3}, {2,1,0,-1}, {3,4,5,-1} };
int hextvpe[12][2] = { {3,2}, {0,1}, {4,5}, {7,6}, {3,7}, {2,6},
{1,5}, {0,4}, {3,0}, {7,4}, {6,5}, {2,1} };
int hextvpf[6][4] = { {3,0,4,7}, {6,5,1,2}, {3,2,1,0},
{4,5,6,7},{3,7,6,2}, {1,5,4,0} };
/*----------------------------------------------------------------------------*/
/* Transform a surface mesh into polygons and a tet mesh into polyhedra */
/*----------------------------------------------------------------------------*/
int main(int ArgCnt, char **ArgVec)
{
int i, j, k, ver, dim, ref, nod[8], ArgIdx = 1;
int NmbVer, NmbTri, NmbQad, NmbTet, NmbPyr, NmbPri, NmbHex;
int64_t InpMsh, OutMsh;
float xf, yf, zf;
double xd, yd, zd;
char *InpNam, *OutNam;
if(ArgCnt != 3)
{
puts("\nMESH2POLY 1.1, september 15 2021, Loic MARECHAL / INRIA\n");
puts(" Usage : mesh2poly source_name destination_name\n");
exit(0);
}
InpNam = ArgVec[ ArgIdx++ ];
OutNam = ArgVec[ ArgIdx++ ];
if(!strlen(InpNam))
{
puts("Missing input name.");
exit(1);
}
if(!strlen(OutNam))
{
puts("Missing output name.");
exit(2);
}
if(!strcmp(InpNam, OutNam))
{
puts("The output mesh cannot overwrite the input mesh.");
exit(3);
}
if(!(InpMsh = GmfOpenMesh(InpNam, GmfRead, &ver, &dim)))
{
printf("Cannot open mesh file %s.\n", InpNam);
return(4);
}
if(!(OutMsh = GmfOpenMesh(OutNam, GmfWrite, ver, dim)))
{
printf("Cannot open mesh file %s.\n", OutNam);
return(5);
}
NmbVer = (int)GmfStatKwd(InpMsh, GmfVertices);
NmbTri = (int)GmfStatKwd(InpMsh, GmfTriangles);
NmbQad = (int)GmfStatKwd(InpMsh, GmfQuadrilaterals);
NmbTet = (int)GmfStatKwd(InpMsh, GmfTetrahedra);
NmbPri = (int)GmfStatKwd(InpMsh, GmfPrisms);
NmbPyr = (int)GmfStatKwd(InpMsh, GmfPyramids);
NmbHex = (int)GmfStatKwd(InpMsh, GmfHexahedra);
printf(" InpMsh: idx = %lld, version: %d, dimension: %d\n", InpMsh, ver, dim);
// Copy all the vertices
if(NmbVer)
{
printf(" Copying %d vertices\n", NmbVer);
GmfGotoKwd(InpMsh, GmfVertices);
GmfSetKwd(OutMsh, GmfVertices, NmbVer);
for(i=1;i<=NmbVer;i++)
{
if(ver <= 1)
{
GmfGetLin(InpMsh, GmfVertices, &xf, &yf, &zf, &ref);
GmfSetLin(OutMsh, GmfVertices, xf, yf, zf, ref);
}
else
{
GmfGetLin(InpMsh, GmfVertices, &xd, &yd, &zd, &ref);
GmfSetLin(OutMsh, GmfVertices, xd, yd, zd, ref);
}
}
}
// Transform triangles and quads into boundary polygons
if(NmbTri || NmbQad)
{
GmfSetKwd(OutMsh, GmfBoundaryPolygonHeaders, NmbTri + NmbQad);
if(NmbTri)
{
printf(" Adding %d triangles to the polygons headers\n", NmbTri);
for(i=1;i<=NmbTri;i++)
GmfSetLin(OutMsh, GmfBoundaryPolygonHeaders, (i-1) * 3 + 1, ref);
}
if(NmbQad)
{
printf(" Adding %d quads to the polygons headers\n", NmbQad);
for(i=1;i<=NmbQad;i++)
GmfSetLin(OutMsh, GmfBoundaryPolygonHeaders, (i-1) * 4 + NmbTri * 3 + 1, ref);
}
GmfSetKwd(OutMsh, GmfBoundaryPolygonVertices, NmbTri * 3 + NmbQad * 4);
if(NmbTri)
{
printf(" Adding %d triangles to the polygons faces\n", NmbTri);
GmfGotoKwd(InpMsh, GmfTriangles);
for(i=1;i<=NmbTri;i++)
{
GmfGetLin(InpMsh, GmfTriangles, &nod[0], &nod[1], &nod[2], &ref);
for(j=0;j<3;j++)
GmfSetLin(OutMsh, GmfBoundaryPolygonVertices, nod[j]);
}
}
if(NmbQad)
{
printf(" Adding %d quads to the polygons faces\n", NmbQad);
GmfGotoKwd(InpMsh, GmfQuadrilaterals);
for(i=1;i<=NmbQad;i++)
{
GmfGetLin(InpMsh, GmfQuadrilaterals, &nod[0], &nod[1], &nod[2], &nod[3], &ref);
for(j=0;j<4;j++)
GmfSetLin(OutMsh, GmfBoundaryPolygonVertices, nod[j]);
}
}
}
// Transform tets into inner polygons and polyhedra
if(NmbTet)
{
GmfSetKwd(OutMsh, GmfInnerPolygonHeaders, 4 * NmbTet);
if(NmbTet)
{
printf(" Adding %d tet's faces to the polygons headers\n", 4 * NmbTet);
for(i=0;i<NmbTet;i++)
for(j=0;j<4;j++)
GmfSetLin(OutMsh, GmfInnerPolygonHeaders, i * 12 + j * 3 + 1, ref);
}
GmfSetKwd(OutMsh, GmfInnerPolygonVertices, 12 * NmbTet);
if(NmbTet)
{
printf(" Adding %d tet's faces to the polygons faces\n", NmbTet);
GmfGotoKwd(InpMsh, GmfTetrahedra);
for(i=1;i<=NmbTet;i++)
{
GmfGetLin(InpMsh, GmfTetrahedra, &nod[0], &nod[1], &nod[2], &nod[3], &ref);
for(j=0;j<4;j++)
for(k=0;k<3;k++)
GmfSetLin(OutMsh, GmfInnerPolygonVertices, nod[ tettvpf[j][k] ]);
}
}
GmfSetKwd(OutMsh, GmfPolyhedraHeaders, NmbTet);
if(NmbTet)
{
printf(" Adding %d tets to the polyhedra headers\n", NmbTet);
GmfGotoKwd(InpMsh, GmfTetrahedra);
for(i=0;i<NmbTet;i++)
{
GmfGetLin(InpMsh, GmfTetrahedra, &nod[0], &nod[1], &nod[2], &nod[3], &ref);
GmfSetLin(OutMsh, GmfPolyhedraHeaders, i * 4 + 1, ref);
}
}
GmfSetKwd(OutMsh, GmfPolyhedraFaces, NmbTet * 4);
if(NmbTet)
{
printf(" Adding %d tet's face to the polyhedra faces\n", NmbTet * 4);
for(i=0;i<NmbTet;i++)
for(j=0;j<4;j++)
GmfSetLin(OutMsh, GmfPolyhedraFaces, i * 4 + j + 1);
}
}
GmfCloseMesh(InpMsh);
GmfCloseMesh(OutMsh);
return(0);
}
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