private static bool isBorderByPosition(int vertex, V2FDict ref_dict)
{
#if IGNORE_NEAR
if (checkNear(vertex) >= 0)
{
return(false);
}
#endif
if (ref_dict[vertex].Count < MIN_FACES)
{
return(true);
}
PEPlugin.SDX.V3 around = new PEPlugin.SDX.V3(0.0f, 0.0f, 0.0f);
foreach (int[] face in ref_dict[vertex])
{
int pos = Array.IndexOf(face, vertex);
int v1 = face[(pos + 1) % 3];
int v2 = face[(pos + 2) % 3];
PEPlugin.SDX.V3 sub =
all_vertex_list[v2].Position -
all_vertex_list[v1].Position;
around = around + sub;
}
return(norm2(around) > NEAR * NEAR);
}
private static int checkNear(int vertex)
{
int index = reverse_v[vertex];
while (index < sorted_v.Length - 1)
{
index++;
PEPlugin.SDX.V3 sub_next =
all_vertex_list[vertex].Position -
all_vertex_list[sorted_v[index]].Position;
if (sub_next.Y * sub_next.Y >= NEAR * NEAR)
{
break;
}
if (norm2(sub_next) < NEAR * NEAR)
{
return(index + 1);
}
}
index = reverse_v[vertex];
while (index > 1)
{
index--;
PEPlugin.SDX.V3 sub_before =
all_vertex_list[vertex].Position -
all_vertex_list[sorted_v[index]].Position;
if (sub_before.Y * sub_before.Y >= NEAR * NEAR)
{
break;
}
if (norm2(sub_before) < NEAR * NEAR)
{
return(index - 1);
}
}
return(-1);
}
private static float norm2(PEPlugin.SDX.V3 v)
{
return(v.X * v.X + v.Y * v.Y + v.Z * v.Z);
}