[Bf-python] Object/Mesh constructors

[David Jagoe]

On 17 July 2010 00:13, Campbell Barton <ideasman42 at gmail.com> wrote:
> Take a look at the script which adds a torus in blender 2.5, I tried
> to keep this a fairly simple example which you can use to base scripts
> off.
>
> A search for torus in the api docs shows this.
>
> http://www.blender.org/documentation/250PythonDoc/bpy.ops.mesh.html?highlight=torus#bpy.ops.mesh.primitive_torus_add
>
> File and line number referenced in docs.

Ah, I foolishly grepped only the source directory and didn't hit any
of these scripts.

Thanks for your help, that's exactly what I'm looking for.


Cheers,
David

>
> On Fri, Jul 16, 2010 at 5:56 PM, David Jagoe <davidjagoe at gmail.com> wrote:
>> Hi Campbell,
>>
>> On 8 July 2010 15:36, Campbell Barton <ideasman42 at gmail.com> wrote:
>>> mesh = bpy.data.meshes.new(name="Foo")
>>> obj = bpy.data.objects.new(name="Foo", object_data=mesh)
>>> bpy.context.scene.objects.link(obj)
>>
>> Thanks for your quick response, this seems to be exactly what I'm
>> after. Your example seems to work as expected, and creates a mesh with
>> 0 vertices. I have been experimenting with adding vertices and faces -
>> so far without success. I came across the following code:
>>
>> #               me = bpy.data.meshes.new()
>> #               ob = sce.objects.new(me)
>>
>> #               me.verts.extend([V(bb[0]).resize3D(), V(bb[1]).resize3D(),
>> V(bb[2]).resize3D(), V(bb[3]).resize3D()])
>> #               me.faces.extend([(0,1,2,3),])
>> #               me.verts.extend([V(uv[0]).resize3D(), V(uv[1]).resize3D(),
>> V(uv[2]).resize3D()])
>> #               me.faces.extend([(4,5,6),])
>>
>> Which doesn't work in blender 2.5:
>>
>> Traceback (most recent call last):
>>  File "<console>", line 1, in <module>
>> AttributeError: 'bpy_prop_collection' object has no attribute 'extend'
>>
>>
>> So I tried the following:
>>
>>>>> mesh.add_geometry(verts=4, edges=4, faces=1)
>>
>> After which I can manipulate the vertices but there are no faces or edges:
>>
>>>>> mesh.faces
>> <bpy_collection[0], Mesh.faces>
>>
>>>>> mesh.edges
>> <bpy_collection[0], Mesh.edges>
>>
>> Any advice? My final goal is to end up with a rectangular plane in
>> that same way as doing Add > Mesh > Plane in the GUI would do.
>>
>>
>> Thanks again.
>> Cheers,
>> David
>>
>>>
>>> On Thu, Jul 8, 2010 at 2:57 PM, David Jagoe <davidjagoe at gmail.com> wrote:
>>>> G'day all,
>>>>
>>>> Is there a better way to add an object than using bpy.ops.object_add
>>>> or (e.g) bpy.ops.mesh.primitive_plane_add?
>>>>
>>>> I've tried to use bpy.types.Mesh.
>>>>
>>>> Ideally I would like something like a normal factory or constructor
>>>> method that returns the object to me so that I can manipulate it
>>>> further. I imagine that such a facility must exist but I can't seem to
>>>> find it.
>>>>
>>>>
>>>> Thanks,
>>>> David
>>>> _______________________________________________
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>>>> Bf-python at blender.org
>>>> http://lists.blender.org/mailman/listinfo/bf-python
>>>>
>>>
>>>
>>>
>>> --
>>> - Campbell
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>
>
>
> --
> - Campbell
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