static void Do_Average_Normals (const VECTOR EPoint, const TNORMAL *Tnormal, VECTOR normal, Intersection *Inter, const Ray *ray, TraceThreadData *Thread)
{
int i;
BLEND_MAP *Map = Tnormal->Blend_Map;
SNGL Value;
SNGL Total = 0.0;
VECTOR V1,V2;
Make_Vector (V1, 0.0, 0.0, 0.0);
for (i = 0; i < Map->Number_Of_Entries; i++)
{
Value = Map->Blend_Map_Entries[i].value;
Assign_Vector(V2,normal);
Perturb_Normal(V2,Map->Blend_Map_Entries[i].Vals.Tnormal,EPoint,Inter,ray,Thread);
VAddScaledEq(V1,Value,V2);
Total += Value;
}
VInverseScale(normal,V1,Total);
}
static int subpatch_normal(VECTOR v1, VECTOR v2, VECTOR v3, VECTOR Result, DBL *d)
{
VECTOR V1, V2;
DBL squared_v1, squared_v2;
DBL Length;
VSub(V1, v1, v2);
VSub(V2, v3, v2);
VCross(Result, V1, V2);
Length = VSumSqr(Result);
squared_v1 = VSumSqr(V1);
squared_v2 = VSumSqr(V2);
if (Length <= (BEZIER_EPSILON * squared_v1 * squared_v2))
{
Make_Vector(Result, 1.0, 0.0, 0.0);
*d = -1.0 * v1[X];
return (0);
}
else
{
Length = sqrt(Length);
VInverseScale(Result, Result, Length);
VDot(*d, Result, v1);
*d = 0.0 - *d;
return (1);
}
}
