RAM Preview.py

ram_preview.py

# Requires to place Viewport Preview ROP (https://github.com/baku89/nops/blob/main/otls/viewport_preview.hdalc) 
# on the OBJ context

def getCurrentNetworkEditorPane():
    editors = [pane for pane in hou.ui.paneTabs() if isinstance(pane, hou.NetworkEditor) and pane.isCurrentTab() and pane.pwd().path().startswith("/obj")]
    
    if len(editors):
        return editors[0]
    
pane = getCurrentNetworkEditorPane()

ram_rop = None

if pane:
    node = pane.pwd()
    
    
    # Search Ancestor
    while node is not None:
        
        cat = node.type().childTypeCategory().name()
        
        if cat == 'Object':
            rops = node.recursiveGlob('*', hou.nodeTypeFilter.Rop, False)
            rops = [rop for rop in rops if rop.type().name() == 'viewport_preview']
            
            if len(rops) > 0:
                ram_rop = rops[0]
                break            
        
        # Next
        node = node.parent()
        
        if node == hou.root():
            break

if ram_rop == None:
    hou.ui.displayMessage("No Rop for RAM preview is found")
else:
    ram_rop.parm('preview_from_current').pressButton()