s3d_vector_dot_product - calculate dot product of two vectors
#include <s3d.h>
float s3d_vector_dot_product(const float vector1[],
const float vector2[]);
Calculates and returns the dot product of vector1 and vector2. All
vectors should have the format float[3]. More info on wikipedia.
http://en.wikipedia.org/wiki/Vector_(spatial)
Simon Wunderlich
Author of s3d