I know this is a bit of a flogged horse, but I've got a bit of a problem with vector angles. I've trawled over the forums and tried every acos / atan2 combination I've dug up but no luck so far.
The problem I'm having is that the player can move within a camera bounding area (without the camera following) and I need the player to always look at the mouse position. When the player is at the origin I can get the angle correctly using the atan2 method, but as soon as the player moves from the centre of the screen then the player's aim goes off, as shown in the screenshot.
Does anyone know how I can always have the player pointing towards the mouse_aim position? I've been using the following code to calculate the angle but the values returned are off.... Halp? [help]
// Form the Position-Focus vector and Aim-Camera_Focus Vector
Vector3D a = mPosition - camera_focus;
Vector3D b = mAim - camera_focus;
// Normalize
//a = a.Normalize();
//b = b.Normalize();
float dot = a.x * b.x + a.y * b.y;
// Determine the angle between the two vectors.
angle_inc_r = acos( dot / (a.Length() * b.Length()) );
angle_inc_d = int(RAD2DEG(angle_inc_r));
if( dot < 0 )
{
angle_inc_d = -angle_inc_d;
}
