some questions about the python states and how to deal with handles properly.
1. The python state handle example creates a static and a dynamic handle. when You drag the static xform handle the connected parameters get a direct connection to the handle, as soon as You move the handle You, the connected parameters are highlighted in the parameter window and update during interaction.
I would like to have this behavior with a dynamic handle as well, but I could only come up with a slightly looser connection, by adding updates to the "onHandleToState" and "onStateToHandle" methods. Is there a better way to do this. Best would be to have it to behave the same way like a static handle.
2. I want to align the handle to a specific point on a input curve. The curve has a rot attribute with the rotation vector in it. I added a method to set the pivot on the handle. Now I want to call this method as soon as I enter the state, but could not find a way. the "onEnter" method seemed to be the right point for this, but i could not get access to the parameters of the handle and the node, the state is working on.
I called the methods on the "onHandleToState" and "onStateToHandle" methods but this does not work right and feels just wrong
. The handle is transformed correctly as soon as I move it slightly.Is there a way to call this initial method as soon as the states is entered?
""" State: handle a State type: handle_a Description: handle a Author: mmatzeder Date Created: December 31, 2020 - 09:53:26 """ # Usage: Make sure to add 6 float parameters to the node: # newparameter, newparameter2, newparameter3, newparameter4, newparameter5, newparameter6. # Select node and hit enter in the viewer. import hou import viewerstate.utils as su def positionHandle(node, parms): parms["px"] = node.node("Out").geometry().points()[0].position().x() parms["py"] = node.node("Out").geometry().points()[0].position().y() parms["pz"] = node.node("Out").geometry().points()[0].position().z() parms["pivot_rx"] = node.node("Out").geometry().points()[0].attribValue("rot")[0] parms["pivot_ry"] = node.node("Out").geometry().points()[0].attribValue("rot")[1] parms["pivot_rz"] = node.node("Out").geometry().points()[0].attribValue("rot")[2] class State(object): def __init__(self, state_name, scene_viewer): self.state_name = state_name self.scene_viewer = scene_viewer self.xform_handle = hou.Handle(self.scene_viewer, "Xform") def onEnter(self, kwargs): self.xform_handle.show(True) print self.xform_handle def onHandleToState(self, kwargs): """ Used with bound dynamic handles to implement the state action when a handle is modified. """ node = kwargs["node"] handle = kwargs["handle"] parms = kwargs["parms"] mod_parms = kwargs["mod_parms"] prev_parms = kwargs["prev_parms"] ui_event = kwargs["ui_event"] self.log(parms) if handle == self.xform_handle.name(): positionHandle(node, parms) node.parm("tx").set(parms["tx"]) node.parm("ty").set(parms["ty"]) node.parm("tz").set(parms["tz"]) node.parm("rx").set(parms["rx"]) node.parm("ry").set(parms["ry"]) node.parm("rz").set(parms["rz"]) def onStateToHandle(self, kwargs): """ Used with bound dynamic handles to implement the handle action when a state node parm is modified. """ handle = kwargs["handle"] parms = kwargs["parms"] node = kwargs["node"] if handle == self.xform_handle.name(): positionHandle(node, parms) parms["tx"] = node.parm("tx").evalAsFloat() parms["ty"] = node.parm("ty").evalAsFloat() parms["tz"] = node.parm("tz").evalAsFloat() parms["rx"] = node.parm("rx").evalAsFloat() parms["ry"] = node.parm("ry").evalAsFloat() parms["rz"] = node.parm("rz").evalAsFloat() self.log(parms) def createViewerStateTemplate(): """ Mandatory entry point to create and return the viewer state template to register. """ state_typename = kwargs["type"].definition().sections()["DefaultState"].contents() state_label = "handle a" state_cat = hou.sopNodeTypeCategory() template = hou.ViewerStateTemplate(state_typename, state_label, state_cat) template.bindFactory(State) template.bindIcon(kwargs["type"].icon()) template.bindHandle( "xform", "Xform") return template
I attached a little hip with embedded assets, thanks for Your time