I have been giving it some thought and after several diagrams (more than I would like to admit), I think I have finally understood what you said.
Would it be something like this?:
(p)=point
(V)=vector
I'm still kind of stuck figuring out how to calculate how to rotate it...
-I assume the vector being rotated would be Real_Path=(Destination-Moving_Vehicle).
-And the rotation would be centered around Moving_Vehicle (giving me Temp_Path as the result).
-Then I could calculate Temp_Destination=(Moving_Vehicle+Temp_Path).
But I am still not sure how to calculate by how much I want Real_Path to be rotated.
And I am completely lost about the last step: how to calculate the local pan for Moving_Vehicle looking towards Temp_Destination
EDIT:
I think I got the first part figured out:
void look_at(ENTITY* Vehicle, VECTOR* Destination, ENTITY* Planet)
{
VECTOR V_Nrml;
VECTOR V_Path;
ANGLE Rotation;
//get our vehicle's normal to the planet
vec_diff(V_Nrml,Vehicle.x,Planet.x);
//get the direction to our destination
vec_diff(V_Path,Destination,Vehicle.x);
//translate the destination to our plane
vec_to_angle(Rotation,V_Nrml);
vec_rotateback(V_Path,Rotation);
//make our vehicle look towards the new path
//???
}}
Edit2:
Or mabe I'm just stuck cause I have not understood you correctly and am going in the wrong direction...
