I am trying to create an otl which can paint colors on a geometry(some thing like paint sop), but I found that the brush tool handle only can be accessed when the paint sop node is selected. Is there a way that I can use the brush tool/ handle when I select my OTL? or I can tweak the paint sop node and save my tweaked version paint SOP as a sop OTL?

Take a look at this thread: http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=18863 [sidefx.com]

cool, thanks graham.

I was trying to force the paint SOP being selected inside my OPT- Node.setSelected().
The way you provided seems still needs to change current selection - Node.setCurrent().
Is there anyway that I can keep my OTL as current node and I also can get the brush tool and paint?

Unfortunately you cannot. The only way to enter the painting state is to enter the current nodes (paint nodes) state. You cannot enter that state unless it is current and therefore your parent asset can never be current.

That is sad. thank you again.

So is there anyway that I can create my own paint style SOP? python type SOP OTL? tweak regular paint SOP then save as a custom paint OTL? VEX? or I have to dig into the HDK land?

laiwayne
Is there anyway that I can keep my OTL as current node and I also can get the brush tool and paint?

Well, you can mimic this behaviour, at least to certain extents. What I often do is to use a pin method to lock down the parameters window the paint operation was triggered from. The downside of this approach is to unpin the window manually each time once you are done.

Hey guys, just noticed something that may be of use here… inside of your DA, you can actually right click on your standard paint nodes and “Edit Parameter Interface”. This is not modifying the paint DA itself, is just adding parameters to that instance.

What this means is that, theoretically, you can add a “Done Painting” button with a bit of python to push the user out of the paint context and into the main DA. Also, you may be able to add additional parameters such as sliders, etc, that are connected to your top level parameters that are associated to the paint process (i.e. if you have a blend weight associated to your painting).

I am going to try this later and let you know if it works, but I do not see why it would not

aaaand good news! It looks like this works in lieu of being able to “promote” your brush manipulator, you can actually modify a paint SOP interface to your liking, and have a paint button that dives in, and a done button that gets out

Now, if you go to a type properties of a node, it does allow you to change the name of the node and even the otl that it saves to. Perhaps this could be a way to have your “own” version of the paint SOP?

actually, do not change the name of the node… it will just change it on all instances of the actual paint SOP just add buttons as needed

grayOlorin
Hey guys, just noticed something that may be of use here… inside of your DA, you can actually right click on your standard paint nodes and “Edit Parameter Interface”. This is not modifying the paint DA itself, is just adding parameters to that instance.

What this means is that, theoretically, you can add a “Done Painting” button with a bit of python to push the user out of the paint context and into the main DA. Also, you may be able to add additional parameters such as sliders, etc, that are connected to your top level parameters that are associated to the paint process (i.e. if you have a blend weight associated to your painting).

I am going to try this later and let you know if it works, but I do not see why it would not

Hi Mate,

Could you please post what exactly did you add for the ‘Done Painting’ part in python. Or if you could attach the example file.

I tried to create the button and used callback to go back to the DA level but it din't work. Got ‘NoneType’ has no attribute… error. Obviously i am doing something wrong here.

Would really appreciate your help on this.

Many Thanks

I am not by my computer now, But try this. The issue may be because your callback is trying to point to an hdamodule in the wrong node (I.e the paint node instead of the parent DA). Try this in your callback:

Hou.node(“..”).hdaModule.yourpaintfunction(“..”)

Where yourpaintfunction is whatever you called your function to enter the paint node, and “..” is the relative path to your parent node. You do not want to use pwd() in tHis case since the function is part of the parent da hdamodule

Also, can you post your full callback command for the done painting button in the meantime?

be careful with this approach since
making node editable breaks updating of your HDA for that node
if that node is just paint SOP and you want to tweak it's parameters or painting for each instance of your HDA anyway, it's not a big deal
but
if you have created a few parameters on paint sop and save your HDA, that parameters will not be on paint SOP of all existing instances of your HDA since they are editable

let's say you don't have any instances and make your parameters and button and callback, when you are done you start using your HDA and all is working
then after using it several times
if you need to update something on the paint sop (add new parameter, change parameter reference on existing parameters, or change that callback), then the changes again will not propagate to existing instances of our HDA

so be careful when using editable nodes, it's double–edged sword

Hi guys,
Thanks for replying.

FYI, I needed to paint multiple geometries(say ball and box) so i created individual ‘Paint’ buttons for them and to paint them i am using a ‘groupPaint’ node instead of ‘paint’ since that way it identifies which group of geometry to paint.

Now, in the Paint Ball button i am using

to dive in to the DA and into the groupPaint node and it does its job.

Then, for the Done Painting button i am using


and defined paintBall in Scripts PythonModule as

[ import toolutils
def paintBall(scriptargs):
sopnode = scriptargs
viewer = toolutils.sceneViewer()
paint = sopnode.node(“paintGeo”)
paint.setCurrent(True, True)
viewer.enterCurrentNodeState() ]

where “painGeo” is the name of the DA.

And it gives this error:

[ Traceback (most recent call last):
File “<stdin>”, line 1, in <module>
AttributeError: ‘function’ object has no attribute ‘paintBall’ ]

@tamte

Thanks for pointing that out…
One question, whatever changes are made in the editable nodes will not update the existing instances but they will still applied to every new instance right..??

The error is a result of your attempt to access the Python Module incorrectly in your callback script. You have left off the parentheses () after hdaModule.
hou.node(“..”).hdaModule().paintBall(“..”)

Also, looking at your code, once the function call goes through it will error out again because your function is expecting a dictionary and you are passing it a string.

I would suggest a simple one line callback that just returns you up one level.
kwargs.parent().setCurrent(True, True)
This button will just set the current node to the parent asset and you'll be jumped back out.

Hi Graham,

Thank you for explaining where i was going wrong and for your suggestion, it worked perfectly. I was looking for something exactly like that.

I further had a question, as you must have noticed in the network, since multiple geometries are being painted on the same grid and the output is being merged at the end, some of the geometries are bound to overlap, is there a way to avoid that..?

Your help is much appreciated

sohamramteke
…
One question, whatever changes are made in the editable nodes will not update the existing instances but they will still applied to every new instance right..??

right

Oops sorry about forgetting the () in hdaModule

Good call on the single line command Graham ! Will use that from now on

@sohamramteke, @graham
I am unable to understand where the script, kwargs.parent().setCurrent(True, True) should be entered.

Presently I am using the scene from https://www.sidefx.com/forum/topic/18863/, [www.sidefx.com]

and within the paint SOP inside Painter I have added new button Finish painting and used the above script in the Call Back. Please can you tell me where I am wrong?


Thanks in advance,

Nikitha