For the specific question you are asking, this is probably the page to read: http://www.blender.org/documentation/blender_python_api_2_69_1/info_quickstart.html
bpy.context.scene is the active scene, while bpy.data.scenes['Scene'] is the scene named 'Scene'. They can be the same, it depends which scene the user has selected. On Thu, Nov 7, 2013 at 6:53 PM, Cook, Rich <[email protected]> wrote: > Thanks, that's helpful. > I have been having an issue with the documentation. It's very hard to > explore. There doesn't appear to be an API reference that actually > enumerates and describes all the various functions. For example, > http://www.blender.org/documentation/blender_python_api_2_69_1/info_api_reference.html > seems like a good introduction, but I am having trouble understanding the > relationship and definition of the various concepts, such as contexts, > objects, etc. > > For example, what is the difference between bpy.context.scene and > bpy.data.scenes['Scene'] ? > Are they pointing to the same object? I don't even know where to look for > the answer! Do I need to just practice and keep asking for specifics until > it all dawns on me, or is there a really good book or reference to all this? > > My goal in the end is to do this, all in python: > > Set up camera, lights, and a camera path. Import a mesh to view, and > animate the scene, swapping out meshes at regular intervals to let the mesh > evolve while zooming in, adjusting lights and properties, etc., to capture > the best appearance. > > Thanks! > > On Nov 7, 2013, at 9:01 AM, Bassam Kurdali <[email protected]> wrote: > > Try > > bpy.context.scene.frame_set() > > Operators rely on context so it can get hard to satisfy them (you could also > try making a timeline window visible). You can override context by paying an > optional dict to the operator but I've found this tricky to get right in > practice. > Oh, and welcome to this blender thing, > Bassam > > "Cook, Rich" <[email protected]> wrote: > > Hi, I'm new to this here blender thingie. I was trying some code out to > import a few meshes from a science run, and am getting an error I cannot get > past. I was going to import the timesteps as separate meshes, then set > keyframes on visibility for each mesh at different timesteps in order to > "animate" them. Per > http://blenderscripting.blogspot.de/2011/07/scripted-keyframing-of-hide-hide-render.html > > I am getting the following error: > >>>> bpy.ops.anim.change_frame(frame = 5) > Traceback (most recent call last): > File "<blender_console>", line 1, in <module> > File > "/Volumes/MacProHD/cook47-stuff/Programs/graphics/Blender/blender.app/Contents/MacOS/2.68/scripts/modules/bpy/ops.py", > line 188, in __call__ > ret = op_call(self.idname_py(), None, kw) > RuntimeError: Operator bpy.ops.anim.change_frame.poll() Expected an > timeline/animation area to be active > > I do have a timeline visible in the GUI. I'm not sure what blender is > trying to tell me. > > I'm probably going to change approaches and just load one mesh at a time, > set up the scene, render, and move to the next, etc. However, my technical > curiosity has the best of me here. I'd like to understand why I cannot set > a timestep here. > > Thanks! > > <span class="Apple-style-span" style="border-collapse: separate; > -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: > 0px; color: rgb(0, 0, 0); font-family: Monaco; font-size: 13px; font > > > -- > ✐Richard Cook > ✇ Lawrence Livermore National Laboratory > Bldg-453 Rm-4024, Mail Stop L-557 > 7000 East Avenue, Livermore, CA, 94550, USA > ☎ (office) (925) 423-9605 > ☎ (fax) (925) 423-6961 > --- > Information Management & Graphics Grp., Services & Development Div., > Integrated Computing & Communications Dept. > (opinions expressed herein are mine and not those of LLNL) > > > > > _______________________________________________ > Bf-python mailing list > [email protected] > http://lists.blender.org/mailman/listinfo/bf-python > _______________________________________________ Bf-python mailing list [email protected] http://lists.blender.org/mailman/listinfo/bf-python
