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Use fread() to read binary STL files

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Alessandro Ranellucci 2013-11-12 15:23:48 +01:00
parent 85232bb6fd
commit d0d842e24a
2 changed files with 4 additions and 31 deletions
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1
xs/src/admesh/stl.h
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@ -181,5 +181,4 @@ static void stl_read(stl_file *stl, int first_facet, int first);
static void stl_facet_stats(stl_file *stl, stl_facet facet, int first);
extern void stl_reallocate(stl_file *stl);
static int stl_get_little_int(FILE *fp);
static float stl_get_little_float(FILE *fp);
extern void stl_get_size(stl_file *stl);

34
xs/src/admesh/stlinit.c
View file

@ -52,22 +52,6 @@ stl_get_little_int(FILE *fp)
return(value);
}
static float
stl_get_little_float(FILE *fp)
{
union
{
int int_value;
float float_value;
} value;
value.int_value = fgetc(fp) & 0xFF;
value.int_value |= (fgetc(fp) & 0xFF) << 0x08;
value.int_value |= (fgetc(fp) & 0xFF) << 0x10;
value.int_value |= (fgetc(fp) & 0xFF) << 0x18;
return(value.float_value);
}
void
stl_initialize(stl_file *stl)
@ -251,20 +235,10 @@ stl_read(stl_file *stl, int first_facet, int first)
if(stl->stats.type == binary)
/* Read a single facet from a binary .STL file */
{
facet.normal.x = stl_get_little_float(stl->fp);
facet.normal.y = stl_get_little_float(stl->fp);
facet.normal.z = stl_get_little_float(stl->fp);
facet.vertex[0].x = stl_get_little_float(stl->fp);
facet.vertex[0].y = stl_get_little_float(stl->fp);
facet.vertex[0].z = stl_get_little_float(stl->fp);
facet.vertex[1].x = stl_get_little_float(stl->fp);
facet.vertex[1].y = stl_get_little_float(stl->fp);
facet.vertex[1].z = stl_get_little_float(stl->fp);
facet.vertex[2].x = stl_get_little_float(stl->fp);
facet.vertex[2].y = stl_get_little_float(stl->fp);
facet.vertex[2].z = stl_get_little_float(stl->fp);
facet.extra[0] = fgetc(stl->fp);
facet.extra[1] = fgetc(stl->fp);
// we assume little-endian architecture!
fread(&facet.normal, sizeof(stl_normal), 1, stl->fp);
fread(&facet.vertex, sizeof(stl_vertex), 3, stl->fp);
fread(&facet.extra, sizeof(char), 2, stl->fp);
}
else
/* Read a single facet from an ASCII .STL file */