Re: Shaky camera

[Kevin Fitch <kevin_fitch@xxxxxxxxx>]

Christoph Hintermüller wrote:

> Hi
>
> why adjusting the whole camera in each frame??
> Isn't it enoughto change the point of interest when the object leaves 
> a certain spere arround the point of interrest
> and adjust the cameraposition if the object reaches a near/far 
> distance to the cameraposition or the angle of the viewing direction 
> to the last base dircetion of the camerea reaches a maximum or object 
> would disappear behind another object.
> eg
> minimum distance between object and camera := 3
> maximum distance between object and camera := 20
> maximum direction angles between camera repositons := 30°
>
> radius of focus adjustment := 3
>
>
> according to this values an adjustment of the point of interrrest 
> becomes necessary when the object beein followed moves more than 3 to 
> any side;
> an adjustment of the camera and a reset of viewing angle
> is recommenden when the angle between the direction of the last camera 
> and the actual viewing direction is greater than 30°
> or the distance between camera and object is less than 3 or more than 20
> or if the object would be obscured by another object.
>
>
> cu
> Christoph
   This is an interesting idea, but I think I did not explain my prolem 
correctly. I am more interested in 'riding' the object than watching it 
from afar (I realize now this is not exactly how my original question 
was worded). This is why I updated the camera every frame, my intent was 
to have the viewer siting on (near) the object (which is changing 
orientation) while looking in a particular (user selected) direction as 
the scenery goes by (very quickly, since this is a very fast moving 
object). I want the user to have a feel for where they are in the scene 
and the orientation of the object.
   In hind sight I realize that the camera orientation did not change 
so I removed the pointAt ( I just initialize the orientation ),  but 
things were still shaky. So I put axis.iv at the viewing point, and this 
was still jumping around (w/ and w/o pointAt). The center of the axes 
would move around (I believe it should be in the exact same spot of the 
viewpoint the whole time). At this point I am guessing my problem lies 
elsewhere in the application so I will try to construct a minimal test 
case that reproduces the problem for me.
Kevin