ddg.visualization.blender.curve module

ddg.visualization.blender.curve.curve(name, points, periodic)

Create a Blender curve from points.

Parameters:

namestr

The name attribute of the curve.

pointsnumpy.ndarray of shape (num_points, 3)

The points of the curve. The dtype must be some kind of floating point dtype.

periodicbool

The curve is closed if and only if periodic is True.

Returns:

bpy.types.Curve

Raises:

ValueError

If there already exists a curve with the given name.

ddg.visualization.blender.curve.curve_as_mesh(name, points)

Create a Blender curve from points and convert it to a curve.

Parameters:

namestr

The name attribute of the mesh.

pointsnumpy.ndarray of shape (num_points, 3)

The points of the curve/mesh. The dtype must be some kind of floating point dtype.

Returns:

bpy.types.Mesh

See also

ddg.visualization.new_api.mesh

ddg.visualization.new_api.curve

ddg.visualization.blender.curve.curve_object(points, periodic, curve_and_object_name, collection)

Create a curve from points and wrap it in a Blender object.

Parameters:

pointsnumpy.ndarray of shape (num_points, 3)

The points of the curve. The dtype must be some kind of floating point dtype.

periodicbool

The curve is closed if and only if periodic is True.

curve_and_object_namestr or tuple[str, str]

The name attribute of the curve and the object. If only one string is passed, then use the same name for both.

collectionbpy.types.Collection, str, None

If None, then the Blender object is not linked. Otherwise, the Collection or name of collection to link the object to.

Returns:

bpy.types.Object

Raises:

ValueError

If there already exists a Blender curve or Blender object with the same name.

ddg.visualization.blender.curve.create_curve(coordinates, name='Curve', type='POLY', with_weights=False, cyclic=None, curve=None)

Create a curve object from given coordinates.

Parameters:

coordinatesnumpy.ndarray of shape (n,i) or list of such numpy.ndarray

Array containing the coordinates of the splines.

• A single 2D array means a single spline, a list of 2D arrays means a collection of splines.

• i is 4 if type is ‘POLY’ and with_weights is True. Otherwise i is 3.

• n is the number of (control) points of each curve. Can be different for each curve.

namestr (default=’Curve’)

Name of the new curve object.

type{‘POLY’, ‘BEZIER’, ‘NURBS’}, (default=’POLY’)

Type of the created splines.

with_weightsbool (default=False)

Specify whether weights are given.

• This is only checked if type is ‘POLY’.

• If False, the weights will default to 1.0.

cycliclist of bool (default=None)

Specify which splines are cyclic (defaulting to non-cyclic).

curvebpy.types.Curve (default=None)

When given, the curve object to store the created data

Returns:

bpy.types.Curve

ddg.visualization.blender.curve.add_curve(curvedata, name='Curve', location=(0.0, 0.0, 0.0), collection=None)

Add a bpy.types.Curve object to a collection.

Parameters:

curvedatabpy.types.Curve

Curve to add.

namestr, optional

Name of the bpy.types.Object object.

locationtriple of float, optional

Location of the new bpy.types.Object object.

collectionbpy.types.Collection, optional

Collection to add the curve to.

Returns:

bpy.types.Object

The new created object containing the curve.

Notes

• The collection option defaults to bpy.context.scene.collection.

ddg.visualization.blender.curve.new_bezier_curve(ctr_pts, handles, closed=False, name='Curve', collection=None)

Create a new bezier curve.

Parameters:

ctr_ptsIterable of triples of float

Control points of the bezier curve.

handlesIterable of tuples of triples of float

Left and right handles at the control points.

closedbool, optional

Specify whether curve is closed.

namestr, optional

Name of the bpy.types.Curve and bpy.types.Object object, respecively.

collectionbpy.types.Collection, optional

Collection the curve shall be linked to.

Returns:

bpy.types.Curve or (bpy.types.Object, bpy.types.Curve)

The created curve object if collection is None. Else the curve object and the object linked to collection containing it.

See also

new_bezier_circle, new_bezier_arc

ddg.visualization.blender.curve.set_curve_properties(curve, **properties)

Set curve properties for a Blender curve.

Parameters:

curvebpy.types.Object or bpy.types.Curve

Curve to set properties.

**propertieskeyword arguments

Properties to set.

Returns:

None

ddg.visualization.blender.curve.create_circle_data(name='Circle', radius=1.0, location=(0.0, 0.0, 0.0), rotation=(0.0, 0.0, 0.0))

Create a new bezier circle using standard bpy.ops methods.

Creates a new bpy.types.Curve of bezier type, wraps it in a bpy.types.Object and links this object to bpy.context.scene.collection.

Parameters:

namestr, optional

Name of the created objects.

radiusfloat, optional

Radius of the circle.

locationtriple of float

Center of the bpy.types.Object object.

rotationtriple of float

Rotation of the bpy.types.Object object.

Returns:

bpy.types.Curve

ddg.visualization.blender.curve.new_bezier_circle(trafo=array([[1., 0., 0., 0.], [0., 1., 0., 0.], [0., 0., 1., 0.], [0., 0., 0., 1.]]), collection=None)

Create a new bezier circle.

Parameters:

trafonumpy ndarray, optional

Similarity transformation applied to the circle before adding.

collectionbpy.types.Collection, optional

Collection the curve shall be linked to.

Returns:

bpy.types.Curve or (bpy.types.Object, bpy.types.Curve)

The created curve object if collection is None. Else the curve object and the object linked to collection containing it.

See also

new_bezier_arc

Notes

• The circle lies in the xy-plane before applying trafo.

• The first control point will be (1,0,0) before applying trafo.

• The circle is oriented in counterclockwise direction per default.

ddg.visualization.blender.curve.new_bezier_arc(phi, nbr_ctr_pts='AUTO', trafo=array([[1., 0., 0., 0.], [0., 1., 0., 0.], [0., 0., 1., 0.], [0., 0., 0., 1.]]), reverse=False, collection=None)

Create a circular arc bezier curve.

Parameters:

phifloat

Angle of the circular arc.

nbr_ctr_ptsint, optinal

Number of control points evenly spaced on the circular arc.

trafonumpy ndarray, optional

Similarity transformation applied to the circle before adding.

reversebool, optional

Reverse the orientation of added circle.

collectionbpy.types.Collection, optional

Collection the curve shall be linked to.

Returns:

bpy.types.Curve or (bpy.types.Object, bpy.types.Curve)

The created curve object if collection is None. Else the curve object and the object linked to collection containing it.

See also

new_bezier_circle

Notes

• The circle lies in the xy-plane before applying trafo.

• The first control point will be (1,0,0) before applying trafo.

• The circle is oriented in counterclockwise direction per default.

ddg.visualization.blender.curve.add_bezier_points(spline, ctr_pts, handles, new=False)

Add control points to a bezier spline.

Parameters:

splinebpy.types.Spline

Spline to operate on.

ctr_ptsIterable of triple of float

Control points to add.

handlesIterable of tuple of triple of float

Left and right handles at the control points.

newbool, optional

Is the spline newly created and contains no old data.

Returns:

None

See also

glue_bezier_points

Notes

• This function CHANGES the given spline spline.

• The control points and handles are paired by index.

• The first item of a handle is the left handle and the second is the right.

ddg.visualization.blender.curve.glue_bezier_points(spline, ctr_pts, handles)

Add control points to a spline and match the handles.

Parameters:

splinebpy.types.Spline

Spline to operate on.

ctr_ptsIterable of triple of float

Control points to add.

handlesIterable of tuple of triple of float

Left and right handles at the control points.

Returns:

None

See also

add_bezier_points

Notes

• This function CHANGES the given spline spline.

• The spline spline has to contain at least one control point.

• The function overrides the right handle of the last control point of spline.

• handles has to contain one more item then ctr_pts.

ddg.visualization.blender.curve.add_circle_points(spline, nbr_ctr_pts=4, trafo=array([[1., 0., 0., 0.], [0., 1., 0., 0.], [0., 0., 1., 0.], [0., 0., 0., 1.]]), reverse=False)

Add a circle to a spline.

Parameters:

splinebpy.types.Spline

Spline to operate on.

nbr_ctr_ptsint, optinal

Number of control points evenly spaced on the circle.

trafonumpy ndarray, optional

Similarity 4x4 transformation applied to the circle before adding.

reversebool, optional

Reverse the orientation of added circle.

Returns:

None

See also

add_arc_points, glue_circle_points

Notes

• This function CHANGES the given spline spline.

• The circle lies in the xy-plane before applying trafo.

• The first control point will be (1,0,0) before applying trafo.

• The circle is oriented in counterclockwise direction per default.

ddg.visualization.blender.curve.add_arc_points(spline, phi, nbr_ctr_pts='AUTO', trafo=array([[1., 0., 0., 0.], [0., 1., 0., 0.], [0., 0., 1., 0.], [0., 0., 0., 1.]]), reverse=False)

Add a circular arc to a spline.

Parameters:

splinebpy.types.Spline

Spline to operate on.

phifloat

Angle of the circular arc.

nbr_ctr_ptsint, optinal

Number of control points evenly spaced on the circular arc.

trafonumpy ndarray, optional

Similarity transformation applied to the circle before adding.

reversebool, optional

Reverse the orientation of added circle.

Returns:

None

See also

add_circle_points, glue_arc_points

Notes

• This function CHANGES the given spline spline.

• The circle lies in the xy-plane before applying trafo.

• The first control point will be (1,0,0) before applying trafo.

• The circle is oriented in counterclockwise direction per default.

ddg.visualization.blender.curve.glue_circle_points(spline, nbr_ctr_pts=4, trafo=array([[1., 0., 0., 0.], [0., 1., 0., 0.], [0., 0., 1., 0.], [0., 0., 0., 1.]]), reverse=False)

Add a circle to a spline and match the handles.

Parameters:

splinebpy.types.Spline

Spline to operate on.

nbr_ctr_ptsint, optinal

Number of control points evenly spaced on the circel.

trafonumpy ndarray, optional

Similarity transformation applied to the circle before adding.

reversebool, optional

Reverse the orientation of added circle.

Returns:

None

See also

glue_arc_points, add_circle_points

Notes

• This function CHANGES the given spline spline.

• The circle lies in the xy-plane before applying trafo.

• The first control point will be (1,0,0) before applying trafo.

• The circle is oriented in counterclockwise direction per default.

ddg.visualization.blender.curve.glue_arc_points(spline, phi, nbr_ctr_pts='AUTO', trafo=array([[1., 0., 0., 0.], [0., 1., 0., 0.], [0., 0., 1., 0.], [0., 0., 0., 1.]]), reverse=False)

Add a circular arc to a spline and match the handles.

Parameters:

splinebpy.types.Spline

Spline to operate on.

phifloat

Angle of the circular arc.

nbr_ctr_ptsint, optinal

Number of control points evenly spaced on the circular arc.

trafonumpy ndarray, optional

Similarity transformation applied to the circle before adding.

reversebool, optional

Reverse the orientation of added circle.

Returns:

None

See also

glue_circle_points, add_arc_points

Notes

• This function CHANGES the given spline spline.

• The circle lies in the xy-plane before applying trafo.

• The first control point will be (1,0,0) before applying trafo.

• The circle is oriented in counterclockwise direction per default.

ddg.visualization.blender.curve.clear(curves=None, do_unlink=True)

Delete all given curves.

Parameters:

curvesIterable of bpy.type.Curve (default=True)

Curves to be deleted. If argument is not provided or None all curves will be deleted.

do_unlinkbool (default=True)

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

Returns:

None