Event Handler
To create a Python script in HDA, you need to select an EventHandle, which indicates when you want to execute the script commands you're creating now.
On Created (executes the script when the node is created)
If you select this option to edit the Python script, Python will execute the commands in Python when the node is created
Python Model (Python Model)
This item causes the created script to be executed according to the user settings during the use of the
You can use this item to set up parameter prompts for nodes, etc.
On Delete (executes the script when the node is created)
Common methods for Python on Houdini nodes
Set Color Sets the color.
node = kwargs['node']# Get the current node context = ()# Parent object of the current node (((0.584,0.776,1)))#Set the current node color
Node Creates a node
try:
out = ('null','OUT_render')# Create a node from the parent of the current node
(0,node)# Set the out node input to the current node node
((0,0,0))# Set the color of the out node
except:
pass
Print and Button feedback Print Characters and Button feedback
def CacheGeo():# Create some custom methods in OnCreate that can then be called in the node parameter
this = ()# Get the current node
print "\nCaching......!"
filecache = (() + '/cache_geo')# Get the path to set the cache_geo within the current node to filecache
('execute').pressButton()# Get the status of execute on the filecache node
(((0.584,0.776,1)))# Set node color
def ReloadGeo():
this = ()
print "\nLoaded successfully"
filecache = (() + '/report_geo')
('reload').pressButton()
(((0.475,0.812,0.204)))
output = (() + '/output0') # Set the path of the output0 node within the current node to output
geo = () # Get the geometry of the output and assign it to the geo (ask for the geometry before you can ask for the geometry attribute on this node)
print len(()) #printablegeoordinal number
Set these two buttons (cache_geo, report_geo) to call different methods when they are executed, performing different actions
Parameters to invoke PythonScripts
().hdaModule().CacheGeo()
This is the entire content of this article.