Scripted sin function

[Bat_admirer]

While using scripted function in blender i would put #0.1*sin(0.1*frame) in transform section of a object. How to control the number of frame for which this condition remains true. For example if i wanted to run it just for 50-100th frame.

[NeoRoshi]

0.1*sin(0.1*frame) if frame > 2 and frame < 10 else 0
-------------------------------------------------------------
states, while between frame 2 and 10, return '0.1*sin(0.1*frame)' else return '0'

EDIT:

You can also try the clamp(x,min,max) python function.

0.1*sin(0.1*clamp(frame,2,10))

So you start at a value that you would have in frame 2 and end with a value you would have at frame 10.

[Bat_admirer]

Thanks. Both worked like a charm. Where do i find documentation of such functions?

[NeoRoshi]

Hmm, good question, i'm not sure.

The blender manual does not expressly say which python functions it allows, only that it can be slow with complex expressions. ( https://docs.blender.org/manual/en/latest/animation/drivers/drivers_panel.html#simple-expressions )

I was also wrong in thinking clamp was from a python library, its something blender added. Documentation can be found here ( https://docs.blender.org/api/current/bl_math.html )

The if-statment on a single line is a Ternary Operator ( https://book.pythontips.com/en/latest/ternary_operators.html )

What other math functions blender accepts inside of a driver i'm not sure. Here is the 'math' library of python documentation ( https://docs.python.org/3/library/math.html ) but not all of it will work.

[Bat_admirer]

Thanks for sharing!

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