Add texture coordinates to polygons
#include <s3d.h>
int s3d_load_polygon_tex_coords(int object, const float *tbuf, uint32_t start, uint16_t n);
Just as s3d_pep_polygon_tex_coords(), with the difference you won't alter the latest n polygons but n polygons starting with index start.
Simon Wunderlich
Author of s3d