Function vm_GetNormal

scripts/osiris_vector.h:269–273

Calculates the (normalized) surface normal give three points Parms: n - the computed surface normal (filled in) v0,v1,v2 - three clockwise vertices Returns the magnitude of the normal before it was normalized. The bigger this value, the better the normal.

// Returns the magnitude of the normal before it was normalized.
// The bigger this value, the better the normal.
float vm_GetNormal(vector *n, vector *v0, vector *v1, vector *v2) {
  vm_GetPerp(n, v0, v1, v2);

  return vm_VectorNormalize(n);
}

// Does a simple dot product calculation
float vm_DotProduct(vector *u, vector *v) { return (u->x * v->x) + (u->y * v->y) + (u->z * v->z); }