Delete DOP object with python

[yongbin]

Hi,

How can I delete DOP object with python?

I couldn't find delete method in hou.DopObject yet.

Thank you,

[kare]

node = hou.node("your_node_path")

node.destroy()

This snippet will delete your dop objects and any other network objects

Edited November 21, 2013 by kare

[yongbin]

Hi, kare.

Thank you for your reply. But I need to choose objects for delete.

[graham]

Unfortunately it would seem HOM does not have the ability to destroy simulation objects. You might be able to write an inlinecpp function that does this, but I haven't verified that such a thing is possible.

[graham]

This inlinecpp function seems to work where you pass in your hou.DopNode and hou.DopObject:

bool
deleteDopObject(DOP_Node *node, SIM_Data *data)
{
    DOP_Parent *parent = node->castToDOPParent();

    if (!parent)
    {
        return false
    }

    SIM_Engine  &engine = parent->getNonConstEngine();

    if (data->getDataType() == "SIM_Object")
    {
        SIM_Object *obj = (SIM_Object *)data;

        engine.removeSimulationObject(obj);

        return true;
    }

    return false;
}

[yongbin]

Hi, graham. Thank you for sharing your knowledge!

I've tried import inlinecpp module and inlinecpp.createLibrary, but didn't success. Here is the code I tried.

deleteDopObject = inlinecpp.createLibrary(
    name="cpp_del_dopobj",
    includes="", # WHAT SHOULD I INCLUDE??
    function_sources=["""
bool
deleteDopObject(DOP_Node *node, SIM_Data *data)
{
	    DOP_Parent *parent = node->castToDOPParent();
	    if (!parent)
	    {
			    return false
	    }
	    SIM_Engine  &engine = parent->getNonConstEngine();
	    if (data->getDataType() == "SIM_Object")
	    {
			    SIM_Object *obj = (SIM_Object *)data;
			    engine.removeSimulationObject(obj);
			    return true;
	    }
	    return false;
}"""]
)
[/CODE]

I don't know what module should I include here. Maybe another problem could be also exist. What should I fix here?

Thank you.

[graham]

You basically need to set the includes to include the headers for all the objects that need to be used. Something like this should probably work:

"""#include <DOP/DOP_Parent.h>
#include <DOP/DOP_Node.h>
#include <SIM/SIM_Data.h>
#include <SIM/SIM_Engine.h>
#include <SIM/SIM_Object.h>
"""

[yongbin]

I get it. Thank you graham.

Here is another question. What is different between SIM_Object and SIM_Data?

Because you converted it from object to data. I roughly guessing that it is same (almost?). Is it true?

[yongbin]

Good news with this 13.0.268 release! I checked houdini journal and found this.

 

 

Houdini 13.0.268: Added hou.DopSimulation.removeObject and hou.DopRelationship.removeRelationship to remove objects or relationships from a DOP simulation.