`actor`¶

`Container`([layout])	Provides functionalities for grouping multiple actors using a given layout.
`apply_affine`(aff, pts)	Apply affine matrix aff to points pts.
`axes`([scale, colorx, colory, colorz, opacity])	Create an actor with the coordinate’s system axes where red = x, green = y, blue = z.
`colormap_lookup_table`([scale_range, …])	Lookup table for the colormap.
`cone`(centers, directions, colors[, heights, …])	Visualize one or many cones with different colors and radii
`contour_from_roi`(data[, affine, color, opacity])	Generate surface actor from a binary ROI.
`create_colormap`(v[, name, auto])	Create colors from a specific colormap and return it as an array of shape (N,3) where every row gives the corresponding r,g,b value.
`dots`(points[, color, opacity, dot_size])	Create one or more 3d points.
`grid`(actors[, captions, caption_offset, …])	Creates a grid of actors that lies in the xy-plane.
`label`([text, pos, scale, color])	Create a label actor.
`line`(lines[, colors, opacity, linewidth, …])	Create an actor for one or more lines.
`lines_to_vtk_polydata`(lines[, colors])	Create a vtkPolyData with lines and colors.
`numpy_to_vtk_colors`(colors)	Convert Numpy color array to a vtk color array.
`numpy_to_vtk_matrix`(array)	Convert a numpy array to a VTK matrix.
`numpy_to_vtk_points`(points)	Convert Numpy points array to a vtk points array.
`odf_slicer`(odfs[, affine, mask, sphere, …])	Slice spherical fields in native or world coordinates
`orient2rgb`(v)	Get Standard orientation 2 rgb colormap.
`peak_slicer`(peaks_dirs[, peaks_values, …])	Visualize peak directions as given from `peaks_from_model`.
`point`(points, colors[, _opacity, …])	Visualize points as sphere glyphs
`scalar_bar`([lookup_table, title])	Default scalar bar actor for a given colormap (colorbar)
`set_input`(vtk_object, inp)	Set Generic input function which takes into account VTK 5 or 6.
`set_polydata_triangles`(polydata, triangles)	Set polydata triangles with a numpy array (ndarrays Nx3 int).
`set_polydata_vertices`(polydata, vertices)	Set polydata vertices with a numpy array (ndarrays Nx3 int).
`shallow_copy`(vtk_object)	Create a shallow copy of a given vtkObject object.
`slicer`(data[, affine, value_range, opacity, …])	Cut 3D scalar or rgb volumes into 2D images.
`sphere`(centers, colors[, radii, theta, phi, …])	Visualize one or many spheres with different colors and radii
`streamtube`(lines[, colors, opacity, …])	Use streamtubes to visualize polylines
`surface`(vertices[, faces, colors, smooth, …])	Generates a surface actor from an array of vertices The color and smoothness of the surface can be customized by specifying the type of subdivision algorithm and the number of subdivisions.
`tensor_slicer`(evals, evecs[, affine, mask, …])	Slice many tensors as ellipsoids in native or world coordinates.
`text_3d`(text[, position, color, font_size, …])	Generate 2D text that lives in the 3D world

`Container`¶

class fury.actor.Container(layout=<fury.layout.Layout object>)[source]¶

Bases: object

Provides functionalities for grouping multiple actors using a given layout.

Attributes

anchor3-tuple of float: Anchor of this container used when laying out items in a container. The anchor point is relative to the center of the container. Default: (0, 0, 0).
padding6-tuple of float: Padding around this container bounding box. The 6-tuple represents (pad_x_neg, pad_x_pos, pad_y_neg, pad_y_pos, pad_z_neg, pad_z_pos). Default: (0, 0, 0, 0, 0, 0)

__init__(layout=<fury.layout.Layout object>)[source]¶

Parameters

layoutfury.layout.Layout object: Items of this container will be arranged according to layout.

AddPosition(position)[source]¶

GetBounds()[source]¶: Get the bounds of the container.

GetCenter()[source]¶: Get the center of the bounding box.

GetLength()[source]¶: Get the length of bounding box diagonal.

GetPosition()[source]¶

GetVisibility()[source]¶

NewInstance()[source]¶

SetPosition(position)[source]¶

SetVisibility(visibility)[source]¶

ShallowCopy(other)[source]¶

add(*items, **kwargs)[source]¶

Adds some items to this container.

Parameters

itemsvtkProp3D objects: Items to add to this container.
borrowbool: If True the items are added as-is, otherwise a shallow copy is made first. If you intend to reuse the items elsewhere you should set borrow=False. Default: True.

add_to_scene(ren)[source]¶: Adds the items of this container to a given renderer.

clear()[source]¶: Clears all items of this container.

property items¶

update()[source]¶: Updates the position of the items of this container.

apply_affine¶

fury.actor.apply_affine(aff, pts)[source]¶

Apply affine matrix aff to points pts.

Returns result of application of aff to the right of pts. The coordinate dimension of pts should be the last. For the 3D case, aff will be shape (4,4) and pts will have final axis length 3 - maybe it will just be N by 3. The return value is the transformed points, in this case:: res = np.dot(aff[:3,:3], pts.T) + aff[:3,3:4] transformed_pts = res.T This routine is more general than 3D, in that aff can have any shape (N,N), and pts can have any shape, as long as the last dimension is for the coordinates, and is therefore length N-1.

Parameters

aff(N, N) array-like: Homogenous affine, for 3D points, will be 4 by 4. Contrary to first appearance, the affine will be applied on the left of pts.
pts(…, N-1) array-like: Points, where the last dimension contains the coordinates of each point. For 3D, the last dimension will be length 3.

Returns

transformed_pts(…, N-1) array: transformed points

Notes

Copied from nibabel to remove dependency.

Examples

>>> aff = np.array([[0,2,0,10],[3,0,0,11],[0,0,4,12],[0,0,0,1]])
>>> pts = np.array([[1,2,3],[2,3,4],[4,5,6],[6,7,8]])
>>> apply_affine(aff, pts) #doctest: +ELLIPSIS
array([[14, 14, 24],
       [16, 17, 28],
       [20, 23, 36],
       [24, 29, 44]]...)
Just to show that in the simple 3D case, it is equivalent to:
>>> (np.dot(aff[:3,:3], pts.T) + aff[:3,3:4]).T #doctest: +ELLIPSIS
array([[14, 14, 24],
       [16, 17, 28],
       [20, 23, 36],
       [24, 29, 44]]...)
But `pts` can be a more complicated shape:
>>> pts = pts.reshape((2,2,3))
>>> apply_affine(aff, pts) #doctest: +ELLIPSIS
array([[[14, 14, 24],
        [16, 17, 28]],
<BLANKLINE>
       [[20, 23, 36],
        [24, 29, 44]]]...)

axes¶

fury.actor.axes(scale=(1, 1, 1), colorx=(1, 0, 0), colory=(0, 1, 0), colorz=(0, 0, 1), opacity=1)[source]¶

Create an actor with the coordinate’s system axes where red = x, green = y, blue = z.

Parameters

scaletuple (3,): Axes size e.g. (100, 100, 100). Default is (1, 1, 1).
colorxtuple (3,): x-axis color. Default red (1, 0, 0).
colorytuple (3,): y-axis color. Default green (0, 1, 0).
colorztuple (3,): z-axis color. Default blue (0, 0, 1).
opacityfloat, optional: Takes values from 0 (fully transparent) to 1 (opaque). Default is 1.

Returns

vtkAssembly

colormap_lookup_table¶

fury.actor.colormap_lookup_table(scale_range=(0, 1), hue_range=(0.8, 0), saturation_range=(1, 1), value_range=(0.8, 0.8))[source]¶

Lookup table for the colormap.

Parameters

scale_rangetuple: It can be anything e.g. (0, 1) or (0, 255). Usually it is the mininum and maximum value of your data. Default is (0, 1).
hue_rangetuple of floats: HSV values (min 0 and max 1). Default is (0.8, 0).
saturation_rangetuple of floats: HSV values (min 0 and max 1). Default is (1, 1).
value_rangetuple of floats: HSV value (min 0 and max 1). Default is (0.8, 0.8).

Returns

lookup_tablevtkLookupTable

cone¶

fury.actor.cone(centers, directions, colors, heights=1.0, resolution=10, vertices=None, faces=None)[source]¶

Visualize one or many cones with different colors and radii

Parameters

centersndarray, shape (N, 3)
directionsndarray, shape (N, 3): The orientation vector of the cone.
colorsndarray (N,3) or (N, 4) or tuple (3,) or tuple (4,): RGB or RGBA (for opacity) R, G, B and A should be at the range [0, 1]
heightsndarray, shape (N): The height of the cone.
resolutionint: The resolution of the cone.
verticesndarray, shape (N, 3)
facesndarray, shape (M, 3): If faces is None then a cone is created based on directions, heights and resolution. If not then a cone is created with the provided vertices and faces.

Returns

vtkActor

Examples

>>> from fury import window, actor
>>> scene = window.Scene()
>>> centers = np.random.rand(5, 3)
>>> directions = np.random.rand(5, 3)
>>> heights = np.random.rand(5)
>>> cone_actor = actor.cone(centers, directions, (1, 1, 1), heights)
>>> scene.add(cone_actor)
>>> # window.show(scene)

contour_from_roi¶

fury.actor.contour_from_roi(data, affine=None, color=array([1, 0, 0]), opacity=1)[source]¶

Generate surface actor from a binary ROI.

The color and opacity of the surface can be customized.

Parameters

dataarray, shape (X, Y, Z): An ROI file that will be binarized and displayed.
affinearray, shape (4, 4): Grid to space (usually RAS 1mm) transformation matrix. Default is None. If None then the identity matrix is used.
color(1, 3) ndarray: RGB values in [0,1].
opacityfloat: Opacity of surface between 0 and 1.

Returns

contour_assemblyvtkAssembly: ROI surface object displayed in space coordinates as calculated by the affine parameter.

create_colormap¶

fury.actor.create_colormap(v, name='plasma', auto=True)[source]¶

Create colors from a specific colormap and return it as an array of shape (N,3) where every row gives the corresponding r,g,b value. The colormaps we use are similar with those of matplotlib.

Parameters

v(N,) array: vector of values to be mapped in RGB colors according to colormap
namestr.: Name of the colormap. Currently implemented: ‘jet’, ‘blues’, ‘accent’, ‘bone’ and matplotlib colormaps if you have matplotlib installed. For example, we suggest using ‘plasma’, ‘viridis’ or ‘inferno’. ‘jet’ is popular but can be often misleading and we will deprecate it the future.
autobool,: if auto is True then v is interpolated to [0, 10] from v.min() to v.max()

Notes

FURY supports a few colormaps for those who do not use Matplotlib, for more colormaps consider downloading Matplotlib (see matplotlib.org).

dots¶

fury.actor.dots(points, color=(1, 0, 0), opacity=1, dot_size=5)[source]¶

Create one or more 3d points.

Parameters

pointsndarray, (N, 3)
colortuple (3,)
opacityfloat, optional: Takes values from 0 (fully transparent) to 1 (opaque)
dot_sizeint

Returns

vtkActor

See also

fury.actor.point

grid¶

fury.actor.grid(actors, captions=None, caption_offset=(0, -100, 0), cell_padding=0, cell_shape='rect', aspect_ratio=1.7777777777777777, dim=None)[source]¶

Creates a grid of actors that lies in the xy-plane.

Parameters

actorslist of vtkProp3D objects: Actors to be layout in a grid manner.
captionslist of vtkProp3D objects or list of str: Objects serving as captions (can be any vtkProp3D object, not necessarily text). There should be one caption per actor. By default, there are no captions.
caption_offsettuple of float (optional): Tells where to position the caption w.r.t. the center of its associated actor. Default: (0, -100, 0).
cell_paddingtuple of 2 floats or float: Each grid cell will be padded according to (pad_x, pad_y) i.e. horizontally and vertically. Padding is evenly distributed on each side of the cell. If a single float is provided then both pad_x and pad_y will have the same value.
cell_shapestr: Specifies the desired shape of every grid cell. ‘rect’ ensures the cells are the tightest. ‘square’ ensures the cells are as wide as high. ‘diagonal’ ensures the content of the cells can be rotated without colliding with content of the neighboring cells.
aspect_ratiofloat: Aspect ratio of the grid (width/height). Default: 16:9.
dimtuple of int: Dimension (nb_rows, nb_cols) of the grid. If provided, aspect_ratio will be ignored.

Returns

``fury.actor.Container`` object: Object that represents the grid containing all the actors and captions, if any.

label¶

fury.actor.label(text='Origin', pos=(0, 0, 0), scale=(0.2, 0.2, 0.2), color=(1, 1, 1))[source]¶

Create a label actor.

This actor will always face the camera

Parameters

textstr: Text for the label.
pos(3,) array_like, optional: Left down position of the label.
scale(3,) array_like: Changes the size of the label.
color(3,) array_like: Label color as (r,g,b) tuple.

Returns

lvtkActor object: Label.

Examples

>>> from fury import window, actor
>>> scene = window.Scene()
>>> l = actor.label(text='Hello')
>>> scene.add(l)
>>> #window.show(scene)

line¶

fury.actor.line(lines, colors=None, opacity=1, linewidth=1, spline_subdiv=None, lod=True, lod_points=10000, lod_points_size=3, lookup_colormap=None, depth_cue=False, fake_tube=False)[source]¶

Create an actor for one or more lines.

Parameters

lineslist of arrays
colorsarray (N, 3), list of arrays, tuple (3,), array (K,), None: If None then a standard orientation colormap is used for every line. If one tuple of color is used. Then all streamlines will have the same colour. If an array (N, 3) is given, where N is equal to the number of lines. Then every line is coloured with a different RGB color. If a list of RGB arrays is given then every point of every line takes a different color. If an array (K, ) is given, where K is the number of points of all lines then these are considered as the values to be used by the colormap. If an array (L, ) is given, where L is the number of streamlines then these are considered as the values to be used by the colormap per streamline. If an array (X, Y, Z) or (X, Y, Z, 3) is given then the values for the colormap are interpolated automatically using trilinear interpolation.
opacityfloat, optional: Takes values from 0 (fully transparent) to 1 (opaque). Default is 1.
linewidthfloat, optional: Line thickness. Default is 1.
spline_subdivint, optional: Number of splines subdivision to smooth streamtubes. Default is None which means no subdivision.
lodbool: Use vtkLODActor(level of detail) rather than vtkActor. Default is True. Level of detail actors do not render the full geometry when the frame rate is low.
lod_pointsint: Number of points to be used when LOD is in effect. Default is 10000.
lod_points_sizeint: Size of points when lod is in effect. Default is 3.
lookup_colormapbool, optional: Add a default lookup table to the colormap. Default is None which calls fury.actor.colormap_lookup_table().
depth_cueboolean: Add a size depth cue so that lines shrink with distance to the camera. Works best with linewidth <= 1.
fake_tube: boolean: Add shading to lines to approximate the look of tubes.

Returns

vvtkActor or vtkLODActor object: Line.

Examples

>>> from fury import actor, window
>>> scene = window.Scene()
>>> lines = [np.random.rand(10, 3), np.random.rand(20, 3)]
>>> colors = np.random.rand(2, 3)
>>> c = actor.line(lines, colors)
>>> scene.add(c)
>>> #window.show(scene)

lines_to_vtk_polydata¶

fury.actor.lines_to_vtk_polydata(lines, colors=None)[source]¶

Create a vtkPolyData with lines and colors.

Parameters

lineslist: list of N curves represented as 2D ndarrays
colorsarray (N, 3), list of arrays, tuple (3,), array (K,), None: If None then a standard orientation colormap is used for every line. If one tuple of color is used. Then all streamlines will have the same colour. If an array (N, 3) is given, where N is equal to the number of lines. Then every line is coloured with a different RGB color. If a list of RGB arrays is given then every point of every line takes a different color. If an array (K, 3) is given, where K is the number of points of all lines then every point is colored with a different RGB color. If an array (K,) is given, where K is the number of points of all lines then these are considered as the values to be used by the colormap. If an array (L,) is given, where L is the number of streamlines then these are considered as the values to be used by the colormap per streamline. If an array (X, Y, Z) or (X, Y, Z, 3) is given then the values for the colormap are interpolated automatically using trilinear interpolation.

Returns

poly_datavtkPolyData
is_colormapbool, true if the input color array was a colormap

numpy_to_vtk_colors¶

fury.actor.numpy_to_vtk_colors(colors)[source]¶

Convert Numpy color array to a vtk color array.

Parameters

colors: ndarray

Returns

vtk_colorsvtkDataArray

Notes

If colors are not already in UNSIGNED_CHAR you may need to multiply by 255.

Examples

>>> import numpy as np
>>> from fury.utils import numpy_to_vtk_colors
>>> rgb_array = np.random.rand(100, 3)
>>> vtk_colors = numpy_to_vtk_colors(255 * rgb_array)

numpy_to_vtk_matrix¶

fury.actor.numpy_to_vtk_matrix(array)[source]¶: Convert a numpy array to a VTK matrix.

numpy_to_vtk_points¶

fury.actor.numpy_to_vtk_points(points)[source]¶

Convert Numpy points array to a vtk points array.

Parameters

pointsndarray

Returns

vtk_pointsvtkPoints()

odf_slicer¶

fury.actor.odf_slicer(odfs, affine=None, mask=None, sphere=None, scale=2.2, norm=True, radial_scale=True, opacity=1.0, colormap='plasma', global_cm=False)[source]¶

Slice spherical fields in native or world coordinates

Parameters

odfsndarray: 4D array of spherical functions
affinearray: 4x4 transformation array from native coordinates to world coordinates
maskndarray: 3D mask
sphereSphere: a sphere
scalefloat: Distance between spheres.
normbool: Normalize sphere_values.
radial_scalebool: Scale sphere points according to odf values.
opacityfloat: Takes values from 0 (fully transparent) to 1 (opaque). Default is 1.
colormapNone or str: If None then white color is used. Otherwise the name of colormap is given. Matplotlib colormaps are supported (e.g., ‘inferno’).
global_cmbool: If True the colormap will be applied in all ODFs. If False it will be applied individually at each voxel (default False).

Returns

actorvtkActor: Spheres

orient2rgb¶

fury.actor.orient2rgb(v)[source]¶

Get Standard orientation 2 rgb colormap.

v : array, shape (N, 3) of vectors not necessarily normalized

Returns

carray, shape (N, 3) matrix of rgb colors corresponding to the vectors: given in V.

Examples

>>> from fury import colormap
>>> v = np.array([[1, 0, 0], [0, 1, 0], [0, 0, 1]])
>>> c = colormap.orient2rgb(v)

peak_slicer¶

fury.actor.peak_slicer(peaks_dirs, peaks_values=None, mask=None, affine=None, colors=(1, 0, 0), opacity=1.0, linewidth=1, lod=False, lod_points=10000, lod_points_size=3)[source]¶

Visualize peak directions as given from peaks_from_model.

Parameters

peaks_dirsndarray: Peak directions. The shape of the array can be (M, 3) or (X, M, 3) or (X, Y, M, 3) or (X, Y, Z, M, 3)
peaks_valuesndarray: Peak values. The shape of the array can be (M, ) or (X, M) or (X, Y, M) or (X, Y, Z, M)
affinearray: 4x4 transformation array from native coordinates to world coordinates
maskndarray: 3D mask
colorstuple or None: Default red color. If None then every peak gets an orientation color in similarity to a DEC map.
opacityfloat, optional: Takes values from 0 (fully transparent) to 1 (opaque)
linewidthfloat, optional: Line thickness. Default is 1.
lodbool: Use vtkLODActor(level of detail) rather than vtkActor. Default is False. Level of detail actors do not render the full geometry when the frame rate is low.
lod_pointsint: Number of points to be used when LOD is in effect. Default is 10000.
lod_points_sizeint: Size of points when lod is in effect. Default is 3.

Returns

vtkActor

See also

fury.actor.odf_slicer

point¶

fury.actor.point(points, colors, _opacity=1.0, point_radius=0.1, theta=8, phi=8)[source]¶

Visualize points as sphere glyphs

Parameters

pointsndarray, shape (N, 3)
colorsndarray (N,3) or tuple (3,)
point_radiusfloat
thetaint
phiint
opacityfloat, optional: Takes values from 0 (fully transparent) to 1 (opaque)

Returns

vtkActor

Examples

>>> from fury import window, actor
>>> scene = window.Scene()
>>> pts = np.random.rand(5, 3)
>>> point_actor = actor.point(pts, window.colors.coral)
>>> scene.add(point_actor)
>>> # window.show(scene)

scalar_bar¶

fury.actor.scalar_bar(lookup_table=None, title=' ')[source]¶

Default scalar bar actor for a given colormap (colorbar)

Parameters

lookup_tablevtkLookupTable or None: If None then colormap_lookup_table is called with default options.
titlestr

Returns

scalar_barvtkScalarBarActor

See also

fury.actor.colormap_lookup_table()

set_input¶

fury.actor.set_input(vtk_object, inp)[source]¶

Set Generic input function which takes into account VTK 5 or 6.

Parameters

vtk_object: vtk object
inp: vtkPolyData or vtkImageData or vtkAlgorithmOutput

Returns

vtk_object

Notes

This can be used in the following way::: from fury.utils import set_input poly_mapper = set_input(vtk.vtkPolyDataMapper(), poly_data)

set_polydata_triangles¶

fury.actor.set_polydata_triangles(polydata, triangles)[source]¶

Set polydata triangles with a numpy array (ndarrays Nx3 int).

Parameters

polydatavtkPolyData
trianglesarray (N, 3): triangles, represented as 2D ndarrays (Nx3)

set_polydata_vertices¶

fury.actor.set_polydata_vertices(polydata, vertices)[source]¶

Set polydata vertices with a numpy array (ndarrays Nx3 int).

Parameters

polydatavtkPolyData
verticesvertices, represented as 2D ndarrays (Nx3)

shallow_copy¶

fury.actor.shallow_copy(vtk_object)[source]¶: Create a shallow copy of a given vtkObject object.

slicer¶

fury.actor.slicer(data, affine=None, value_range=None, opacity=1.0, lookup_colormap=None, interpolation='linear', picking_tol=0.025)[source]¶

Cut 3D scalar or rgb volumes into 2D images.

Parameters

dataarray, shape (X, Y, Z) or (X, Y, Z, 3): A grayscale or rgb 4D volume as a numpy array. If rgb then values expected on the range [0, 255].
affinearray, shape (4, 4): Grid to space (usually RAS 1mm) transformation matrix. Default is None. If None then the identity matrix is used.
value_rangeNone or tuple (2,): If None then the values will be interpolated from (data.min(), data.max()) to (0, 255). Otherwise from (value_range[0], value_range[1]) to (0, 255).
opacityfloat, optional: Opacity of 0 means completely transparent and 1 completely visible.
lookup_colormapvtkLookupTable: If None (default) then a grayscale map is created.
interpolationstring: If ‘linear’ (default) then linear interpolation is used on the final texture mapping. If ‘nearest’ then nearest neighbor interpolation is used on the final texture mapping.
picking_tolfloat: The tolerance for the vtkCellPicker, specified as a fraction of rendering window size.

Returns

image_actorImageActor: An object that is capable of displaying different parts of the volume as slices. The key method of this object is display_extent where one can input grid coordinates and display the slice in space (or grid) coordinates as calculated by the affine parameter.

sphere¶

fury.actor.sphere(centers, colors, radii=1.0, theta=16, phi=16, vertices=None, faces=None)[source]¶

Visualize one or many spheres with different colors and radii

Parameters

centersndarray, shape (N, 3)
colorsndarray (N,3) or (N, 4) or tuple (3,) or tuple (4,): RGB or RGBA (for opacity) R, G, B and A should be at the range [0, 1]
radiifloat or ndarray, shape (N,)
thetaint
phiint
verticesndarray, shape (N, 3)
facesndarray, shape (M, 3): If faces is None then a sphere is created based on theta and phi angles If not then a sphere is created with the provided vertices and faces.

Returns

vtkActor

Examples

>>> from fury import window, actor
>>> scene = window.Scene()
>>> centers = np.random.rand(5, 3)
>>> sphere_actor = actor.sphere(centers, window.colors.coral)
>>> scene.add(sphere_actor)
>>> # window.show(scene)

streamtube¶

fury.actor.streamtube(lines, colors=None, opacity=1, linewidth=0.1, tube_sides=9, lod=True, lod_points=10000, lod_points_size=3, spline_subdiv=None, lookup_colormap=None)[source]¶

Use streamtubes to visualize polylines

Parameters

lineslist: list of N curves represented as 2D ndarrays
colorsarray (N, 3), list of arrays, tuple (3,), array (K,), None: If None then a standard orientation colormap is used for every line. If one tuple of color is used. Then all streamlines will have the same colour. If an array (N, 3) is given, where N is equal to the number of lines. Then every line is coloured with a different RGB color. If a list of RGB arrays is given then every point of every line takes a different color. If an array (K, ) is given, where K is the number of points of all lines then these are considered as the values to be used by the colormap. If an array (L, ) is given, where L is the number of streamlines then these are considered as the values to be used by the colormap per streamline. If an array (X, Y, Z) or (X, Y, Z, 3) is given then the values for the colormap are interpolated automatically using trilinear interpolation.
opacityfloat: Takes values from 0 (fully transparent) to 1 (opaque). Default is 1.
linewidthfloat: Default is 0.01.
tube_sidesint: Default is 9.
lodbool: Use vtkLODActor(level of detail) rather than vtkActor. Default is True. Level of detail actors do not render the full geometry when the frame rate is low.
lod_pointsint: Number of points to be used when LOD is in effect. Default is 10000.
lod_points_sizeint: Size of points when lod is in effect. Default is 3.
spline_subdivint: Number of splines subdivision to smooth streamtubes. Default is None.
lookup_colormapvtkLookupTable: Add a default lookup table to the colormap. Default is None which calls fury.actor.colormap_lookup_table().

See also

fury.actor.line()

Notes

Streamtubes can be heavy on GPU when loading many streamlines and therefore, you may experience slow rendering time depending on system GPU. A solution to this problem is to reduce the number of points in each streamline. In Dipy we provide an algorithm that will reduce the number of points on the straighter parts of the streamline but keep more points on the curvier parts. This can be used in the following way:

from dipy.tracking.distances import approx_polygon_track
lines = [approx_polygon_track(line, 0.2) for line in lines]

Alternatively we suggest using the line actor which is much more efficient.

Examples

>>> import numpy as np
>>> from fury import actor, window
>>> scene = window.Scene()
>>> lines = [np.random.rand(10, 3), np.random.rand(20, 3)]
>>> colors = np.random.rand(2, 3)
>>> c = actor.streamtube(lines, colors)
>>> scene.add(c)
>>> #window.show(scene)

surface¶

fury.actor.surface(vertices, faces=None, colors=None, smooth=None, subdivision=3)[source]¶

Generates a surface actor from an array of vertices The color and smoothness of the surface can be customized by specifying the type of subdivision algorithm and the number of subdivisions.

Parameters

verticesarray, shape (X, Y, Z): The point cloud defining the surface.
facesarray: An array of precomputed triangulation for the point cloud. It is an optional parameter, it is computed locally if None
colors(N, 3) array: Specifies the colors associated with each vertex in the vertices array. Optional parameter, if not passed, all vertices are colored white
smoothstring - “loop” or “butterfly”: Defines the type of subdivision to be used for smoothing the surface
subdivisioninteger, default = 3: Defines the number of subdivisions to do for each triangulation of the point cloud. The higher the value, smoother the surface but at the cost of higher computation

Returns

surface_actorvtkActor: A vtkActor visualizing the final surface computed from the point cloud is returned.

tensor_slicer¶

fury.actor.tensor_slicer(evals, evecs, affine=None, mask=None, sphere=None, scale=2.2, norm=True, opacity=1.0, scalar_colors=None)[source]¶

Slice many tensors as ellipsoids in native or world coordinates.

Parameters

evals(3,) or (X, 3) or (X, Y, 3) or (X, Y, Z, 3) ndarray: eigenvalues
evecs(3, 3) or (X, 3, 3) or (X, Y, 3, 3) or (X, Y, Z, 3, 3) ndarray: eigenvectors
affinearray: 4x4 transformation array from native coordinates to world coordinates*
maskndarray: 3D mask
sphereSphere: a sphere
scalefloat: Distance between spheres.
normbool: Normalize sphere_values.
opacityfloat: Takes values from 0 (fully transparent) to 1 (opaque). Default is 1.
scalar_colors(3,) or (X, 3) or (X, Y, 3) or (X, Y, Z, 3) ndarray: RGB colors used to show the tensors Default None, color the ellipsoids using color_fa

Returns

actorvtkActor: Ellipsoid

text_3d¶

fury.actor.text_3d(text, position=(0, 0, 0), color=(1, 1, 1), font_size=12, font_family='Arial', justification='left', vertical_justification='bottom', bold=False, italic=False, shadow=False)[source]¶

Generate 2D text that lives in the 3D world

Parameters

textstr
positiontuple
colortuple
font_sizeint
font_familystr
justificationstr: Left, center or right (default left)
vertical_justificationstr: Bottom, middle or top (default bottom)
boldbool
italicbool
shadowbool

Returns

textActor3D

actor¶

Container¶

apply_affine¶

axes¶

colormap_lookup_table¶

cone¶

contour_from_roi¶

create_colormap¶

dots¶

grid¶

label¶

line¶

lines_to_vtk_polydata¶

numpy_to_vtk_colors¶

numpy_to_vtk_matrix¶

numpy_to_vtk_points¶

odf_slicer¶

orient2rgb¶

peak_slicer¶

point¶

scalar_bar¶

set_input¶

set_polydata_triangles¶

set_polydata_vertices¶

shallow_copy¶

slicer¶

sphere¶

streamtube¶

surface¶

tensor_slicer¶

text_3d¶

`actor`¶

`Container`¶