public LSL_Vector llGroundSlope(LSL_Vector offset)
{
m_host.AddScriptLPS(1);
//Get the slope normal. This gives us the equation of the plane tangent to the slope.
LSL_Vector vsn = llGroundNormal(offset);
//Plug the x,y coordinates of the slope normal into the equation of the plane to get
//the height of that point on the plane. The resulting vector gives the slope.
Vector3 vsl = vsn;
vsl.Z = (float)(((vsn.x * vsn.x) + (vsn.y * vsn.y)) / (-1 * vsn.z));
vsl.Normalize();
//Normalization might be overkill here
vsn.x = vsl.X;
vsn.y = vsl.Y;
vsn.z = vsl.Z;
return vsn;
}