s3d_pep_polygon_normals(3) debian man page | unix.com

S3D_PEP_POLYGON_NORM(3) 					    s3d Manual						   S3D_PEP_POLYGON_NORM(3)

NAME
       s3d_pep_polygon_normals - add normals to polygon

SYNOPSIS
       #include <s3d.h>

       int s3d_pep_polygon_normals(int object, const float *nbuf, uint16_t n);

DESCRIPTION
       Adds normal information to polygons, giving each vertex of a polygon a normal information. With this, you can achieve smoothed edge
       effects.

       nbuf should contain n * 9 float values, for each vertex a normal vector (x,y,z), and you have 3 vertices for each Polygon so that makes 9
       float values per Polygon in total. Don't worry if you don't use this, it's kind of hard to calculate and the server will always use some
       proper normal values (same for every vertex, calculated by the plane which is defined by the 3 points of the polygon.

AUTHOR
       Simon Wunderlich
	   Author of s3d

s3d															   S3D_PEP_POLYGON_NORM(3)