Forums Houdini Indie and Apprentice Pyhton frame selected

Pyhton frame selected

   4599   4   1
User Avatar
jegupi
Member
10 posts
Joined: Dec. 2018
Offline
 
Hello,

I'm trying to make a python script to select a node and frame the view in that node. Have solve the selection part but cannot find how to frame in the viewport. Was checking the sceneViewer commands but cannot find anything to frame in the view there.
 Report
User Avatar
N-G
Member
209 posts
Joined: March 2018
Offline
 
Did you use hou.setFrame()?
https://www.sidefx.com/docs/houdini/hom/hou/setFrame.html [www.sidefx.com]
 Report
User Avatar
dzigakaiser
Member
17 posts
Joined: Aug. 2012
Offline
 
In theory it is this:

import toolutils
viewer = toolutils.sceneViewer()
view = viewer.curViewport()
view.frameSelected()

For me this works fine inside the Python shell or a Python SOP but I am having trouble using it in external Python scripts of my HDA. It somehow does not want to frame it from there:/
Maybe you will have more success there.
freelance matte painter & environment concept artist
 Report
User Avatar
andehpandeh
Member
25 posts
Joined: March 2019
Offline
 
#get the render cam
cam = hou.node('/obj/renderCAM')

#get a sphere to focus on 
sphere = hou.node('/obj/sphere1/sphere1')

#move the cam to focus on the bounding box of the sphere
bBox = sphere.geometry().boundingBox()

#set viewport to the render camera & frame the bounding box  
view = toolutils.sceneViewer().curViewport()
view.setCamera(cam)
view.lockCameraToView(True)
view.frameBoundingBox(bBox)

Here's a little sample of accessing a cam and geometry, getting the bounding box of the geo and then framing the geo
in the viewport.
A problem that I've had is that everything works (the viewport switches to the render cam, locks the view) except .frameBoundingBox(), but if I run the code a second time, it will frame the camera to the bounding box of the geometry.
Any ideas on how to get the code to work by only running it once?
Edited by andehpandeh - July 16, 2021 13:48:09
 Report
User Avatar
dzigakaiser
Member
17 posts
Joined: Aug. 2012
Offline
 
andehpandeh
#get the render cam
cam = hou.node('/obj/renderCAM')

#get a sphere to focus on 
sphere = hou.node('/obj/sphere1/sphere1')

#move the cam to focus on the bounding box of the sphere
bBox = sphere.geometry().boundingBox()

#set viewport to the render camera & frame the bounding box  
view = toolutils.sceneViewer().curViewport()
view.setCamera(cam)
view.lockCameraToView(True)
view.frameBoundingBox(bBox)

Here's a little sample of accessing a cam and geometry, getting the bounding box of the geo and then framing the geo
in the viewport.
A problem that I've had is that everything works (the viewport switches to the render cam, locks the view) except .frameBoundingBox(), but if I run the code a second time, it will frame the camera to the bounding box of the geometry.
Any ideas on how to get the code to work by only running it once?

Hi andehpandeh,

the way I wrote it and it seems to work so far is this:

cam = obj_level.createNode('cam', 'asset_cam')
node.setSelected(True,True)
view.frameSelected()
view.saveViewToCamera(cam)
view.setCamera(cam)

The difference is that I create a new cam that frames the selected node.
If I already have a specific camera, I set it up manually and my tool uses it as is.
Possibly this will work for you as well to create a brand new cam. Or maybe you just need the saveViewToCamera() after framing, and then setting the cam in the viewport again.

So I would try this first in your case:
#get the render cam
cam = hou.node('/obj/renderCAM')

#get a sphere to focus on 
sphere = hou.node('/obj/sphere1/sphere1')

#move the cam to focus on the bounding box of the sphere
#bBox = sphere.geometry().boundingBox()

#set viewport to the render camera & frame the bounding box  
view = toolutils.sceneViewer().curViewport()
# view.setCamera(cam)
view.lockCameraToView(True)
sphere.setSelected(True, True)
view.frameSelected()
view.saveViewToCamera(cam)
view.setCamera(cam)

You can of course also try this approach with the bbox instead ^.^

Let me know if this works! I am curious.

Good luck!
Dziga
freelance matte painter & environment concept artist
 Report
  • Quick Links