ddg.visualization.blender.object module

Collection of utility functions dealing with Blender objects

ddg.visualization.blender.object.blender_object(name, data)

Wrap a Blender data-block in a Blender object.

Parameters:

namestr (default=`None`)

The name attribute of the object. If None, then use the name attribute of data.

databpy.types.ID

A Blender data-block, e.g. curves and meshes whose types - bpy.types.Mesh and bpy.types.Curve respectively - are subclasses of bpy.types.ID.

Returns:

bpy.types.Object

ddg.visualization.blender.object.link(bobj, collection)

Link a Blender object to a collection.

Parameters:

bobjbpy.types.Object

Blender object to be linked.

collectionbpy.types.Collection or str

Collection or name of collection to link the object to.

Notes

If no collection exists with the given name, a new one will be created.

ddg.visualization.blender.object.from_data(data, name, parent=None, matrix=array([[1., 0., 0., 0.], [0., 1., 0., 0.], [0., 0., 1., 0.], [0., 0., 0., 1.]]), collection=None)

Create an object from a data block.

Parameters:

databpy.data

Data to be wrapped in the object.

namestr

Name of the newly created object.

parentbpy.types.Object (default=None)

Parent of the newly created object.

matrixnumpy.ndarray (default=np.eye(4))

Local transformation of the object.

collectionbpy.types.Collection (default=None)

Collection to link the object to, if None, object will not be linked.

Returns:

bpy.types.Object

Object that was created with given data.

ddg.visualization.blender.object.delete(bobj)

Delete a Blender object.

Parameters:

bobjbpy.types.Object

Blender object to be deleted.

ddg.visualization.blender.object.copy(bobj, collection=None)

Makes a Copy of a Blender object and links it.

Parameters:

bobjbpy.types.Object

Blender object to be duplicated.

collectionbpy.types.Collection (default=None)

Links copy to the given collection, if None, object will not be linked.

Returns:

bpy.types.Curve of bpy.types.Object

the copy of the given object.

ddg.visualization.blender.object.set_matrix_world(bobj, matrix)

Set the matrix_world of bobj to matrix.

Parameters:

bobjbpy.types.Object

Blender object to set matrix_world.

matrixnumpy.ndarray or mathutils.Matrix

4x4 matrix.

Raises:

ValueError

If dimensions of matrix are not 4x4. If type of matrix is not numpy.ndarray or mathutils.Matrix.

ddg.visualization.blender.object.matrix_world_transformation_function(matrix)

Creates a function that transforms Blender objects by a matrix.

Parameters:

matrixnumpy.ndarray or mathutils.Matrix

4x4 matrix.

Returns:

object_trafoPython function

ddg.visualization.blender.object.set_prop(bobj, prop, val)

Set a single property of a Blender object.

Parameters:

bobjbpy.types.Object

Blender object to set prperty to.

propstr

Name of the property.

valany

New value of the property.

ddg.visualization.blender.object.look_at_point(bobj, point, bobj_front=(0, -1, 0), bobj_up=(0, 0, 1), world_up=(0, 0, 1), distance=None, atol=None, rtol=None)

Rotates an object such that it looks at the given point.

If a distance is given, the object is additionally translated along the viewing direction to match the given distance to the point. If no distance is given, the object remains at its position.

The default directions are set to fit the Suzanne object.

Parameters:

bobjbpy.types.Object

Blenders object to move.

pointiterable of 3 floats

Point of reference to turn object.

bobj_frontiterable of 3 floats (default=(0,-1,0))

Viewing direction of the object in the object space. That is the direction in which the object is looking in the object space.

bobj_upiterable of 3 floats (default=(0,0,1))

Up direction of the object in the object space. That is where the top is situed in the object space.

world_upiterable of 3 floats (default=(0,0,1))

Where the up direction should end up.

distance: float, default=None

Distance the object should have from the point.

atol, rtolfloat, default=None

Tolerances used to determine whether object is located at point.

If None, the global defaults will be used.

Raises:

ValueError

If the object is located at the target point.

ddg.visualization.blender.object.empty(collection=None, location=array([0, 0, 0]), empty_type='PLAIN_AXES', name='root', parent=None)

Creates an empty blender object.

Parameters:

collection: bpy.types.Collection (default=None)

Links copy to the given collection. If None, object will not be linked.

location: numpy.ndarray (default=np.array((0, 0, 0)))

location of empty object.

empty_type: str (default=”PLAIN_AXES”)

Viewport display style for empty object.

name: str (default=”root”)

Name of empty object.

parent: bpy.types.Object (default=None)

Parent of empty object.

Returns:

bpy.types.Object

ddg.visualization.blender.object.clear(objects=None, do_unlink=True, deep=True)

Delete all given objects.

Parameters:

objectsIterable of bpy.type.Object (default=None)

Objects to be deleted. If the argument is not provided or None, all objects will be deleted.

do_unlinkbool (default=True)

Unlink objects from their collections, if needed, before deleting them.

deepbool (default=True)

Delete the data corresponding to the object.

ddg.visualization.blender.object.clear_empty_objects(do_unlink=True, deep=True)

Delete all empty objects.

Parameters:

do_unlinkbool (default=True)

Unlink objects from their collections, if needed, before deleting them.

deepbool (default=True)

Delete the data corresponding to the object.

ddg.visualization.blender.object.clear_lattices(lattices=None, do_unlink=True)

Delete all given lattices.

Parameters:

latticesIterable of bpy.type.Lattice (default=None)

Lattices to be deleted. If the argument is not provided or None, all lattices will be deleted.

do_unlinkbool (default=True)

Unlink lattices from their scenes, if needed, before deleting them.

ddg.visualization.blender.object.get_data(x)

Return the data attribute if it exists or the input itself.

Parameters:

xAny

Returns:

Any

Examples

>>> import bpy
>>> from ddg.visualization.blender.object import get_data
>>>
>>> bpy.ops.mesh.primitive_cube_add()
{'FINISHED'}
>>> data = bpy.context.object.data
>>> assert data == get_data(bpy.context.object)
>>> assert data == get_data(bpy.context.object.data)