Hi there yeah i had already swapped the X & Y rotations in my first test.
this worked fine. but as soon as I rotate about the Z axis it doesn't seem to work. What I realised is that a Z-rotation of the camera in Away, doesn't rotate about the Z-axis like "Bank" in Cinema Does. the closest to "Bank" in cinema is roll() but roll sets a relative value as apposed to an absolute one. thanks for looking into this! :-) cheers On May 10, 4:16 pm, Andreas Engstrom <[email protected]> wrote: > I have had a look at resolving this and have committed a fix on svn > that should fix a problem with reversed 'bank' direction for parsed > C4D cameras. > > When I was looking over the parser code I noticed something I had > forgotten about that might help with your issue. Switch the xml values > for the camera rotations x and y and see if that helps. The parser > does this automatically but since you are extracting the values > straight from C4D doing that might fix it. > > I also noticed that the camera rotation conversion seems to produce a > slight offset when 'banking' the camera which I'm not sure why it is > happening. I will look into this some more given the time but let me > know how you get on in the meantime. > > .andreas > > On 9 May 2009, at 00:08, Andreas Engstrom wrote: > > Hi. > > That does sound a bit odd, I'll have a look at that. I'm wondering if > it might be a case of gimbal lock (see link below). > > http://www.youtube.com/watch?v=rrUCBOlJdt4 > > .andreas > > On 8 May 2009, at 14:05, mc wrote: > > Hi There, > > I'm been having a bit of trouble with the away builder & Cinema 4D. > > I setup a simple scene in C4D, with a cube and camera. > I then animated the camera around the cube using an animation track > and keyframed start and end positions over 90 frames (still in C4D). > > I then exported the Cinema XML > I also exported a JPEG sequence to make sure the camera i would > animate in Away 3D matched up perfectly * > > The first test I did, the geometry matched up perfectly. (I had to > tweak the zoom on the camera slightly to make it match which was a > minor problem I had with it) > > The second test I did was a more complex camera move. and didn't work > so well. > > After many hours scratching my head I realized that as soon as I > introduced a "Bank" rotation in Cinema 4D, it went all wrong. > > The values for the Away 3D camera's "rotationZ" were exactly the same > as the value for "Bank" in Cinema 4D. > > I'm no expert when it comes to the working out of rotationX/rotationY/ > rotationZ, and its relation to Heading/Pitch/Bank, but the "Bank" and > "rotationZ" don't seem to relate to each other directly, as it messes > up the positioning. > > Am I right in thinking this? if so this may be a bug in the away > builder > > Really enjoying Away 3D though :-) > > *if you want me into more detail on how I did that i can, but i > basically just spat out keyframe data from Cinema using Xpresso and an > array in AS3, then drove the camera parameters by that array.
