public unsafe void GetRuleBounds(ref BoundingBox request, out BoundingBox ruleBounds)
{
Vector3 *vertices = stackalloc Vector3[8];
ruleBounds.Min = new Vector3(float.PositiveInfinity);
ruleBounds.Max = new Vector3(float.NegativeInfinity);
request.GetCornersUnsafe(vertices);
float latitude, longitude;
if (Vector3.Zero.IsInsideInclusive(ref request.Min, ref request.Max))
{
ruleBounds.Min.X = 0;
}
else
{
var clamp = Vector3.Clamp(Vector3.Zero, request.Min, request.Max);
ruleBounds.Min.X = m_planetShape.DistanceToRatio(clamp.Length());
}
{ // Calculate furthest point in BB
Vector3 end;
Vector3 c = request.Center;
if (c.X < 0)
{
end.X = request.Min.X;
}
else
{
end.X = request.Max.X;
}
if (c.Y < 0)
{
end.Y = request.Min.Y;
}
else
{
end.Y = request.Max.Y;
}
if (c.Z < 0)
{
end.Z = request.Min.Z;
}
else
{
end.Z = request.Max.Z;
}
ruleBounds.Max.X = m_planetShape.DistanceToRatio(end.Length());
}
// If box intercepts Y axis (north south axis).
if (request.Min.X < 0 && request.Min.Z < 0 && request.Max.X > 0 && request.Max.Z > 0)
{
ruleBounds.Min.Z = -1;
ruleBounds.Max.Z = 3;
for (int i = 0; i < 8; i++)
{
float len = vertices[i].Length();
latitude = vertices[i].Y / len;
if (ruleBounds.Min.Y > latitude)
{
ruleBounds.Min.Y = latitude;
}
if (ruleBounds.Max.Y < latitude)
{
ruleBounds.Max.Y = latitude;
}
}
}
else
{
for (int i = 0; i < 8; i++)
{
float len = vertices[i].Length();
vertices[i] /= len;
latitude = vertices[i].Y;
Vector2 lon = new Vector2(-vertices[i].X, -vertices[i].Z);
lon.Normalize();
longitude = lon.Y;
if (lon.X > 0)
{
longitude = 2 - longitude;
}
if (ruleBounds.Min.Y > latitude)
{
ruleBounds.Min.Y = latitude;
}
if (ruleBounds.Max.Y < latitude)
{
ruleBounds.Max.Y = latitude;
}
if (ruleBounds.Min.Z > longitude)
{
ruleBounds.Min.Z = longitude;
}
if (ruleBounds.Max.Z < longitude)
{
ruleBounds.Max.Z = longitude;
}
}
}
}
