Can I specify the Linear/Angular velocity using clutter-box2d - or do I have to use the box2d library and mix C++ with my C.
Thanks On Tue, Aug 26, 2008 at 8:32 PM, Øyvind Kolås <[EMAIL PROTECTED]> wrote: > On Tue, Aug 26, 2008 at 4:23 AM, Saul Lethbridge > <[EMAIL PROTECTED]> wrote: > > Alternatively, could I set the actor as 'manipulatable' - some how > prevent > > the stage from receiving input and send synthetic drag signals to the > > actors? Seems to me that it would be easier and more logical to not set > > actors as manipulatable and simply move them around using clutter > functions > > (I did try this by the way but it seems if I don't set an actor's mode, > it's > > not visible at all). > > The mode of the actor, and whether it is manipulatable is two > different properties. The mode is either "dynamic" or "static". > > Manipulating the positions of actors directly by using Clutter APIs > works to some extent but might cause issues in the simulation. > > It might be worth trying to move over larger distances than one pixel > since the synchronisation of clutter state and box2d state tries to > avoid unnecesary synchronisations over small distances. > > For manipulating dynamic actors it is highly recommended that this is > done either by a mouse joint (as the code used when actors > "manipulatable" is TRUE). Or by specifying the linear/angular > velocity. In Box2D there are other additional APIs to excert a linear > force on an actor on a specific point with a given direction. > > /Øyvind K. > -- > «The future is already here. It's just not very evenly distributed» > -- William Gibson > http://pippin.gimp.org/ http://ffii.org/ >
