Re: [Visualpython-users] General 3D mouse control, what's the correct strategy ?

[Bruce S. <Bru...@nc...>]

I can only note that one environment that seems to have good 3D mousing 
is Second Life.

Bruce Sherwood

Stef Mientki wrote:
> hello,
> 
> This is a general question of how to manipulate 3D objects with the 
> mouse on 2D screen ?
> 
> I've a default scene, with the centre in the middle of the screen.
> I've created a room, with the floor in the positive xz-plane.
> now I've objects on the ceiling, that can move and rotate in the xz-plane.
> 
> I project both the mouse position and the objects to the floor,
> and then calculate the angles and move or rotate the object.
> 
> Sometimes this works great, but  sometimes the movement seems to be 
> opposite to where my mouse is going,
> especially the rotation behaves strange.
> For rotating the following strategy works quit well, but seems very 
> unnatural to me:
> - click the object to select it for rotation (around a fixed axis),
> - move the cursor far away, moving in the direction away from the object
> and thus from the axis of ration and from the center of the screen
> - then move the mouse around the rotation point
> 
> Are there better methods ?
> Maybe some websites ?
> 
> thanks,
> Stef Mientki
> 
> 
> 
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