github-mirrors/OrcaSlicer-bambulab
1
0
Fork 0
mirror of https://github.com/FULU-Foundation/OrcaSlicer-bambulab.git synced 2026-07-22 09:24:43 +03:00
Code Issues Packages Projects Releases Wiki Activity

admesh: Fixed a problem in loading an STL when compiled with

Browse Source 
Visual Studio 2013. Added multiple compile time checks for data
sizes and alignment. The library STL import is not big endian safe, so
added a test for endianity, modified STL export to a faster little endian only.
This commit is contained in:
bubnikv
2016-11-17 16:57:58 +01:00
parent 9772584d78
commit 2085a482c7
3 changed files with 24 additions and 72 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
xs/src/admesh/stl_io.c
View File

@@ -203,63 +203,6 @@ stl_print_neighbors(stl_file *stl, char *file) {
fclose(fp);
}
void
stl_put_little_int(FILE *fp, int value_in) {
int new_value;
union {
int int_value;
char char_value[4];
} value;
value.int_value = value_in;
new_value = value.char_value[0] & 0xFF;
new_value |= (value.char_value[1] & 0xFF) << 0x08;
new_value |= (value.char_value[2] & 0xFF) << 0x10;
new_value |= (value.char_value[3] & 0xFF) << 0x18;
fwrite(&new_value, sizeof(int), 1, fp);
}
void
stl_put_little_float(FILE *fp, float value_in) {
int new_value;
union {
float float_value;
char char_value[4];
} value;
value.float_value = value_in;
new_value = value.char_value[0] & 0xFF;
new_value |= (value.char_value[1] & 0xFF) << 0x08;
new_value |= (value.char_value[2] & 0xFF) << 0x10;
new_value |= (value.char_value[3] & 0xFF) << 0x18;
fwrite(&new_value, sizeof(int), 1, fp);
}
void
stl_write_binary_block(stl_file *stl, FILE *fp)
{
int i;
for(i = 0; i < stl->stats.number_of_facets; i++)
{
stl_put_little_float(fp, stl->facet_start[i].normal.x);
stl_put_little_float(fp, stl->facet_start[i].normal.y);
stl_put_little_float(fp, stl->facet_start[i].normal.z);
stl_put_little_float(fp, stl->facet_start[i].vertex[0].x);
stl_put_little_float(fp, stl->facet_start[i].vertex[0].y);
stl_put_little_float(fp, stl->facet_start[i].vertex[0].z);
stl_put_little_float(fp, stl->facet_start[i].vertex[1].x);
stl_put_little_float(fp, stl->facet_start[i].vertex[1].y);
stl_put_little_float(fp, stl->facet_start[i].vertex[1].z);
stl_put_little_float(fp, stl->facet_start[i].vertex[2].x);
stl_put_little_float(fp, stl->facet_start[i].vertex[2].y);
stl_put_little_float(fp, stl->facet_start[i].vertex[2].z);
fputc(stl->facet_start[i].extra[0], fp);
fputc(stl->facet_start[i].extra[1], fp);
}
}
void
stl_write_binary(stl_file *stl, const char *file, const char *label) {
FILE *fp;
@@ -285,11 +228,9 @@ stl_write_binary(stl_file *stl, const char *file, const char *label) {
for(i = strlen(label); i < LABEL_SIZE; i++) putc(0, fp);
fseek(fp, LABEL_SIZE, SEEK_SET);
stl_put_little_int(fp, stl->stats.number_of_facets);
stl_write_binary_block(stl, fp);
fwrite(&stl->stats.number_of_facets, 4, 1, fp);
for(i = 0; i < stl->stats.number_of_facets; i++)
fwrite(stl->facet_start + i, SIZEOF_STL_FACET, 1, fp);
fclose(fp);
}