s3d_load_polygon_normals - add normals to polygon
#include <s3d.h>
int s3d_load_polygon_normals(int object, const float *nbuf,
uint32_t start, uint16_t n);
Just as s3d_pep_polygon_normals(), with the difference you won´t alter
the latest n polygons but n polygons starting with index start.
Simon Wunderlich
Author of s3d