Hi everyone,
I’ve tried searching this forum but I’m just getting page errors so, apologies if this question has been answered previously…
I’ve hit a problem using the ‘at time’ method within a script controller. Lets say I have a box animating from [0,0,0] to [10,0,0] over ten frames. In the listener I can expose an interpolated value at specific times using:
at time frameNumber $Box01.pos.controller.X_position
This seems to work fine until I try and call this code from within a script controller – regardless of the value of frameNumber it always returns the value at the current frame.
Anyone know what I’m doing wrong?
Thanks very much for taking the time to look…
Duncs
What are you passing to it as frameNumber? I just gave it a try passing it solid numbers like 6, 8 etc and no matter what I do it returns the value at the frame number I give it, not the current frame. That is what you are after I believe? Perhaps you have it passing the currentTime to it? If not, could you give me some more info, like what track you have the float_script on, and what you are doing with the value returned by this. Are you simply printing the value, or setting something else to it?
I have a box just animating on x over 10 frames, with this in a float_script in the pos.z.controller and when I move the box by hand or scrub the timeline it prints the position of the box at frame 8 in the listener. The same works with other numbers I tried.
print (at time 8 $Box01.pos.controller.X_position)
0
Hope this is some help, but I am tired
I just tested this and it works ok for me – this was placed inside the Height controller of the Box.
(
framenumber = 5
x=(at time frameNumber BoxCon.value )
print x
)
BoxCon is a variable created through the script controller menu Assign Controller.
Not only is it faster but it’s the prefered way to point to controllers/nodes etc as it’s not reliant upon the Nodes name which the user can change therefore breaking your code.
I think it’s Node Variable in the help file.
Thanks for the replies guys – much appreciated. I finally got it working – the problem seemed to be that I was using a target variable to expose the animated track rather than a node variable with the track explicitly targeted in the script body.
Example 1 – returns value at current frame
(
framenumber = 5
x=(at time frameNumber value)– value is assigned to the animated track via a target variable
print x
)
Example 2 – returns value at requested frame
(
framenumber = 5
x=(at time frameNumber node.value)– node is assigned to the animated object via a node variable
print x
)
I can’t see why you should get a different result but hey ho – it works!
Thanks again
Duncs
You don’t need to use a node, you can use a controller instead. If you used a named parameter it will not work, you need the object that holds the value so that controller will work in this instance. Also use can use F for frame in the script controller to get the current frame value.
Thanks for the info Paul – I was using a named parameter – a scripted custom attribute (for which I also have your website to thank!!)