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Introduction
There is an Expression Control Mode in the decision node, which allow allows us that use expression expressions or script scripts to directly control the output result of a sentence result.
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Video Tutorial
Advanced Tutorials Variable & Expression part
Instructions
Switch the mode of decision node from normal to the “expression” mode.
Please notice in this mode, only 1 input and 1 output channel available.
expression mode of decision node
only 1 input and 1 output available
Sentences Tim
Input condition:
you You can choose any one sentence from GUI, and then delete the arithmetic part of sentence ( < ??) or ( from ?? to ?? ) or ( < ?? ) or (LEFT/RIGHT/UP/DOWN) etc...
For example:
- spot to me distance < ??
- spot to me distance
- my type ID from ?? to ??
- my type ID
Output decision
you can choose any one sentence from GUI, and then delete the value content part of sentence ( ?? )
For example:
- move FORWARD as speed ??
- move FORWARD as speed
- set maya attribute:??? value ??
- set maya attribute:??? value
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Example 1
Using sentence return value to control Head Translate Offset
(Noise ID) rand float based on my id
(Bone Offset) set my bone:head translate Y offset
head offset directly controlled by expression
Example 2
Using sentence return value to control expression and then control the Head Translate Offset
(Agent ID) my ID
giving agent id value to attribute "aaa"
use my ID -> aaa -> expression -> control the head bone Y offset
head offset Y controlled by value of agent ID
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Please notice that, do not contain "blanks" in python code session:
maya python:${aaa}+0.1 (correct)
maya python:${aaa} + 0.1 (incorrect)
Additionally, you can use real python command to control this:
maya python:abc(${aaa})
define a python command:
def abc(var):
return var * 5