I am using Blensor v2.67. I have a camera and several objects in my scene. The camera follows a path and I would like to save what the camera sees for each frame. Among other things, I would like to save the (oriented) bounding boxes of my objects. I did some research, but I believe Display bounding box around objects only displays the bounding boxes and in Save the bounding box position of an object in a text file the requirements seem to be different (2D, moving object,...). Any answer on how to do this will be greatly appreciated! Is there inherent functionality to do this or do I need to include a custom script?
From my answer here, you can create a bounding cube around an object:
Select the target object and press CtrlShiftAltC > Origin to goemetry, and then press F6 and select bounds center.
With the target object selected, press ShiftS> Cursor to selected to move the cursor to the objects origin.
Add a cube to be the bounding box. It will automatically be centered at the 3D cursor, which is snapped to the target object's origin point.
Copy the Dimension and Rotation values from the target object to the bounding cube. These values are located on the Properties region (N in the 3D view):
You can quickly copy and paste values by hovering over the number field and pressing CtrlC/CtrlV accordingly.
Since this process of copying and pasting the values of each channel can be a bit tedious, you can use a quick bit of python to do this for you:
import bpy active = bpy.context.active_object selected = bpy.context.selected_objects for obj in selected: obj.dimensions = active.dimensions
Parent the bounding box to the target object so the relative location, rotation, and scale is kept the same. You can also set the bounding cube's Draw type to Wire in Properties > Object > Display > Maximum Draw Type.
This processes could be automated in python:
import bpy selected = bpy.context.selected_objects for obj in selected: #ensure origin is centered on bounding box center bpy.ops.object.origin_set(type='ORIGIN_GEOMETRY', center='BOUNDS') #create a cube for the bounding box bpy.ops.mesh.primitive_cube_add() #our new cube is now the active object, so we can keep track of it in a variable: bound_box = bpy.context.active_object #copy transforms bound_box.dimensions = obj.dimensions bound_box.location = obj.location bound_box.rotation_euler = obj.rotation_euler
This adds a bounding box object for every selected object.
By using the addon I added to your other question you can create a bounding box that has the dimensions that you can easily export to a text file.
If you want to export an individual bounding box for each object you can enable the addon and run the following -
startobjs = [o.name for o in bpy.context.selected_objects] for objname in startobjs: bpy.ops.object.select_all(action='DESELECT') bpy.data.objects[objname].select = True bpy.ops.mesh.boundbox_add()
As the addon names each bounding box with the name BoundingBox you can easily select just the bounding boxes (using select pattern in the select menu) and then export the selected objects.
Then when you export turn on the selected only option available in most exporters. If your using your own script to export to text then loop over the selected objects.
for obj in bpy.context.selected_objects: print(obj.dimensions.x)