Camera rotation request

#1 We made a couple of shortcuts in the camera/scenegraph rendering code but it's not that difficult to take those out and allow arbitrary rotations of the camera. I've no idea when we'll get around to doing this though but I do acknowledge it as a neat feature to have, definately.

- Melv.

#2 Thanks for the info. I completely understand it not ranking high on your list.

#3 I'll second this request. I just encountered this today... I was assuming that I'd be able to do it, and was dissapointed when I found out you couldn't.

The main thing I'm wanting it for is for styles of games where the player stays stationary, and the world rotates around. Some driving games do this I think, or the old coinop Assault is a good example.

#4 Old post, I know. Just figured I post here instead of starting a new thread.

Any update on this? I really need to rotate the camera in a prototype I'm putting together. If this is off the list of things that will get added, any hints on where I should start messing to get it working?

#5 Okay, I have a "hack" in place that seem to work for my purposes so far. It would still be nice to know if there will ever be a proper solution to this, especially since the t2d product page says "Camera rotation, mounting, zoom". *hint, hint* =)

#6 Can you share that hack? I'm assuming it requires modification to the source code ?? I'd like a way to simply rotate the camera 90 degrees to the left or right...

#7 Well, it's a pretty horrible hack but it works okay for my purposes. It can be optimized quite a lot, especially if you only need 90 degree rotations.

In t2dSceneWindow::onRender() just above dglSetViewport(updateRect); add:

// blikstad: translate to 0,0,0, rotate, translate back.
t2dVector camPos = getCurrentCameraPosition();
glTranslatef(camPos.mX, camPos.mY, 0);
glRotatef (mCameraCurrent.mCameraAngle,0,0,1);
glTranslatef(-camPos.mX, -camPos.mY, 0);
//

change t2dTileLayer::getCollisionAreaPhysics() to:

// Choose Appropriate Render Method.
// blikstad: Always render tileMaps with the renderArbitraryAngleObject function to allow for rotating camera.
// Arbitrary Angle.
return getCollisionAreaPhysics_ArbitraryAngle( worldArea );

and t2dTileLayer::renderObject() to:

// Ignore if not part of a scene.
if ( !getSceneGraph() )
    return;

// Choose Appropriate Render Method.
// blikstad: Always render tileMaps with the renderArbitraryAngleObject function to allow for rotating camera.
// Arbitrary Angle.
renderArbitraryAngleObject( viewPort, viewIntersection );

Then the really messy part that absolutely shouldn't be done this way... It's ugly as hell, but, hey, it works. For now. =)
In t2dTileLayer::renderArbitraryAngleObject() just below viewPortMax = (viewPort.point + viewPort.extent);

// 
// blikstad: Extend viewPortMin and Max a bit to make sure all tiles in view get 
//		 drawn. Yes, the values are hardcoded, and this yes is a damn ugly hack. 
//		 Bleh, I don't care. It works.
t2dVector viewPortResize(15,25);
viewPortMin -= viewPortResize;
viewPortMax += viewPortResize;
//

You have to add functions to set the mCameraAngle to t2dSceneWindow too, but that should be pretty straight forwards, just do whatever is done to the zoom variable.

#8 Cool, thanks for the code snips :) I'll give this a try once I get vc2005 Express installed!

#9 Is this still planned to be added? Would be cool indeed. Imagine a 360

#10 Yea, I 'd also like to know if this is still in the works. It's not just a neat effect, it's something that helps break away from the standard 2d game look (IMHO).

#11 T2D has so many cool features that Rotate Camera feels odd not to have :)

#12 I added free rotation to my game. It works well but some objects at the corners don't get drawn for some reason. I guess it has something to do with viewPortResize but I don't have a clue what to change there. Can anyone help?

#13 I suppose this is the place to post a second/third/etc for camera rotation, and/or the ability to mount the camera to an object and track the rotation there, too.

#14 How did you add rotation Olli?

#15 I added the code from Magnus Blikstad's post. If I remember right I didn't have to do anything else.

#16 I would also really make use of this feature. I expected it when I bought the engine, but I'll try out Magnus Blikstad's code before I start to beg.

~John Lucas~

#17 /raises hand for camera rotation

/raises both hands if it can optionally track an object's rotation when mounted.

#18 Is camera rotation still not implemented? If it is how do you get it to work? (its not tracking the roation of the sprite at the moment).

Cheers
Tom

#19 *bump* has anyone tried the code snippet up above in TGB Pro 1.5.0? My hand is still raised for camera rotation capability...

#20 *bump* I thought for sure I'd be able to mount the camera and 'track rotation' like a regular mounted object, but unfortunately the scenewindow2d doesn't have that functionality in the mount function...

I will try implementing the above code in my tgb (1.6), though I also request this become a standard feature...here are 2 examples where it would come in handy:


#1 A game like 'punishment' in which the entire room rotates without changing any of the game state

#2 A different way of viewing the standard asteroids/subspace game in which your ship always looks straight ahead