[TouchDesigner] Tips for for statements using python
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My name is ibuibu69 and I make videos and music as a hobby! I used to do things like VJ and instrumental bands using max and processing. .. https://www.youtube.com/watch?v=NswI72i6lCg
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Main subject
When trying to do difficult things with TouchDesigner, control by python becomes indispensable.
However, I think there are relatively few TouchDesigner users (including myself) who are familiar with python. .. .. maybe. ..
Therefore, here are some tips for batch operations of operators using for statements, which you will often use.
Operate many operators
For example, "Substitute 1 for value 0 of constant 1, 2 ... 9" is as follows.
for i in range(1,10):
op( 'constant' + str(i) ).par.value0 = 1
This is easy, isn't it?
Commentary: Since the inside of op () is a string, i must be a string with str ().
Assign to many parameters
For example, "Substitute 1 for values 1, 2, ... 9 of constant1" is as follows.
for i in range(1,10):
script = 'op(\'constant1\').par.value' + str(i) + ' = 1'
exec(script)
print(a)
Use the exec function. (I didn't know this and struggled.)
Tips: To make the value item number an iterator, first write the entire statement you want to execute in string type and embed the iterator. Then execute it with the exec () function. Don't forget to escape the quotes! !!
Get the values of many parameters
For example, "Display the total value of 1,2, ... 10 of constant1" is as follows.
a = 0
for i in range(10):
a += eval('op(\'constant1\').par.value' + str(i) )
print(a)
It's similar to the exec function above, but this time it uses eval, a function that evaluates values.
You may use the exec function as shown below.
a = 0
for i in range(10):
script = 'a += op(\'constant1\').par.value' + str(i)
exec(script)
Summary
In this way, when you want to turn TouchDesigner's built-in function with a for statement, using exec or eval works well.
It was an introduction! !!
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