def test_get_bounds():
size = (15, 15)
test_bounds = [0.0, 15, 0.0, 15, 0.0, 0.0]
points = Points()
points.InsertNextPoint(0, 0, 0)
points.InsertNextPoint(size[0], 0, 0)
points.InsertNextPoint(size[0], size[1], 0)
points.InsertNextPoint(0, size[1], 0)
# Create the polygon
polygon = Polygon()
polygon.GetPointIds().SetNumberOfIds(4) # make a quad
polygon.GetPointIds().SetId(0, 0)
polygon.GetPointIds().SetId(1, 1)
polygon.GetPointIds().SetId(2, 2)
polygon.GetPointIds().SetId(3, 3)
# Add the polygon to a list of polygons
polygons = CellArray()
polygons.InsertNextCell(polygon)
# Create a PolyData
polygonPolyData = PolyData()
polygonPolyData.SetPoints(points)
polygonPolyData.SetPolys(polygons)
# Create a mapper and actor
mapper = PolyDataMapper2D()
mapper = set_input(mapper, polygonPolyData)
actor = Actor2D()
actor.SetMapper(mapper)
compute_bounds(actor)
npt.assert_equal(get_bounds(actor), test_bounds)
def test_save_and_load_polydata():
l_ext = ["vtk", "fib", "ply", "xml"]
fname = "temp-io"
for ext in l_ext:
with InTemporaryDirectory() as odir:
data = np.random.randint(0, 255, size=(50, 3))
pd = PolyData()
pd.SetPoints(numpy_to_vtk_points(data))
fname_path = pjoin(odir, "{0}.{1}".format(fname, ext))
save_polydata(pd, fname_path)
npt.assert_equal(os.path.isfile(fname_path), True)
assert_greater(os.stat(fname_path).st_size, 0)
out_pd = load_polydata(fname_path)
out_data = numpy_support.vtk_to_numpy(out_pd.GetPoints().GetData())
npt.assert_array_equal(data, out_data)
npt.assert_raises(IOError, save_polydata, PolyData(), "test.vti")
npt.assert_raises(IOError, save_polydata, PolyData(), "test.obj")
npt.assert_raises(IOError, load_polydata, "test.vti")
def generate_points():
centers = np.array([[1, 0, 0], [0, 1, 0], [0, 0, 1]])
colors = np.array([[1, 0, 0], [0, 1, 0], [0, 0, 1]]) * 255
vtk_vertices = Points()
# Create the topology of the point (a vertex)
vtk_faces = CellArray()
# Add points
for i in range(len(centers)):
p = centers[i]
id = vtk_vertices.InsertNextPoint(p)
vtk_faces.InsertNextCell(1)
vtk_faces.InsertCellPoint(id)
# Create a polydata object
polydata = PolyData()
# Set the vertices and faces we created as the geometry and topology of the
# polydata
polydata.SetPoints(vtk_vertices)
polydata.SetVerts(vtk_faces)
set_polydata_colors(polydata, colors)
mapper = PolyDataMapper()
mapper.SetInputData(polydata)
mapper.SetVBOShiftScaleMethod(False)
point_actor = Actor()
point_actor.SetMapper(mapper)
return point_actor
def test_save_and_load_options():
l_ext = ["ply", "vtk"]
l_options = [{
'color_array_name': 'horizon',
}, {
'binary': True,
}]
fname = "temp-io"
for ext, option in zip(l_ext, l_options):
with InTemporaryDirectory() as odir:
data = np.random.randint(0, 255, size=(50, 3))
pd = PolyData()
pd.SetPoints(numpy_to_vtk_points(data))
fname_path = pjoin(odir, "{0}.{1}".format(fname, ext))
save_polydata(pd, fname_path, **option)
npt.assert_equal(os.path.isfile(fname_path), True)
assert_greater(os.stat(fname_path).st_size, 0)
out_pd = load_polydata(fname_path)
out_data = numpy_support.vtk_to_numpy(out_pd.GetPoints().GetData())
npt.assert_array_equal(data, out_data)
l_ext = ["vtk", "vtp", "ply", "stl", "mni.obj"]
l_options = [{}, {
'binary': False,
}]
for ext, option in zip(l_ext, l_options):
with InTemporaryDirectory() as odir:
data = np.random.randint(0, 255, size=(50, 3))
pd = PolyData()
pd.SetPoints(numpy_to_vtk_points(data))
fname_path = pjoin(odir, "{0}.{1}".format(fname, ext))
save_polydata(pd, fname_path, **option)
npt.assert_equal(os.path.isfile(fname_path), True)
assert_greater(os.stat(fname_path).st_size, 0)
def repeat_sources(centers,
colors,
active_scalars=1.,
directions=None,
source=None,
vertices=None,
faces=None,
orientation=None):
"""Transform a vtksource to glyph."""
if source is None and faces is None:
raise IOError("A source or faces should be defined")
if np.array(colors).ndim == 1:
colors = np.tile(colors, (len(centers), 1))
pts = numpy_to_vtk_points(np.ascontiguousarray(centers))
cols = numpy_to_vtk_colors(255 * np.ascontiguousarray(colors))
cols.SetName('colors')
if isinstance(active_scalars, (float, int)):
active_scalars = np.tile(active_scalars, (len(centers), 1))
if isinstance(active_scalars, np.ndarray):
ascalars = numpy_support.numpy_to_vtk(np.asarray(active_scalars),
deep=True,
array_type=VTK_DOUBLE)
ascalars.SetName('active_scalars')
if directions is not None:
directions_fa = numpy_support.numpy_to_vtk(np.asarray(directions),
deep=True,
array_type=VTK_DOUBLE)
directions_fa.SetName('directions')
polydata_centers = PolyData()
polydata_geom = PolyData()
if faces is not None:
set_polydata_vertices(polydata_geom, vertices)
set_polydata_triangles(polydata_geom, faces)
polydata_centers.SetPoints(pts)
polydata_centers.GetPointData().AddArray(cols)
if directions is not None:
polydata_centers.GetPointData().AddArray(directions_fa)
polydata_centers.GetPointData().SetActiveVectors('directions')
if isinstance(active_scalars, np.ndarray):
polydata_centers.GetPointData().AddArray(ascalars)
polydata_centers.GetPointData().SetActiveScalars('active_scalars')
glyph = Glyph3D()
if faces is None:
if orientation is not None:
transform = Transform()
transform.SetMatrix(numpy_to_vtk_matrix(orientation))
rtrans = TransformPolyDataFilter()
rtrans.SetInputConnection(source.GetOutputPort())
rtrans.SetTransform(transform)
source = rtrans
glyph.SetSourceConnection(source.GetOutputPort())
else:
glyph.SetSourceData(polydata_geom)
glyph.SetInputData(polydata_centers)
glyph.SetOrient(True)
glyph.SetScaleModeToScaleByScalar()
glyph.SetVectorModeToUseVector()
glyph.Update()
mapper = PolyDataMapper()
mapper.SetInputData(glyph.GetOutput())
mapper.SetScalarModeToUsePointFieldData()
mapper.SelectColorArray('colors')
actor = Actor()
actor.SetMapper(mapper)
return actor
def lines_to_vtk_polydata(lines, colors=None):
"""Create a vtkPolyData with lines and colors.
Parameters
----------
lines : list
list of N curves represented as 2D ndarrays
colors : array (N, 3), list of arrays, tuple (3,), array (K,)
If None or False, 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_data : vtkPolyData
color_is_scalar : bool, true if the color array is a single scalar
Scalar array could be used with a colormap lut
None if no color was used
"""
# Get the 3d points_array
points_array = np.vstack(lines)
# Set Points to vtk array format
vtk_points = numpy_to_vtk_points(points_array)
# Set Lines to vtk array format
vtk_cell_array = numpy_to_vtk_cells(lines)
# Create the poly_data
poly_data = PolyData()
poly_data.SetPoints(vtk_points)
poly_data.SetLines(vtk_cell_array)
# Get colors_array (reformat to have colors for each points)
# - if/else tested and work in normal simple case
nb_points = len(points_array)
nb_lines = len(lines)
lines_range = range(nb_lines)
points_per_line = [len(lines[i]) for i in lines_range]
points_per_line = np.array(points_per_line, np.intp)
color_is_scalar = False
if colors is None or colors is False:
# set automatic rgb colors
cols_arr = line_colors(lines)
colors_mapper = np.repeat(lines_range, points_per_line, axis=0)
vtk_colors = numpy_to_vtk_colors(255 * cols_arr[colors_mapper])
else:
cols_arr = np.asarray(colors)
if cols_arr.dtype == object: # colors is a list of colors
vtk_colors = numpy_to_vtk_colors(255 * np.vstack(colors))
else:
if len(cols_arr) == nb_points:
if cols_arr.ndim == 1: # values for every point
vtk_colors = numpy_support.numpy_to_vtk(cols_arr,
deep=True)
color_is_scalar = True
elif cols_arr.ndim == 2: # map color to each point
vtk_colors = numpy_to_vtk_colors(255 * cols_arr)
elif cols_arr.ndim == 1:
if len(cols_arr) == nb_lines: # values for every streamline
cols_arrx = []
for (i, value) in enumerate(colors):
cols_arrx += lines[i].shape[0] * [value]
cols_arrx = np.array(cols_arrx)
vtk_colors = numpy_support.numpy_to_vtk(cols_arrx,
deep=True)
color_is_scalar = True
else: # the same colors for all points
vtk_colors = numpy_to_vtk_colors(
np.tile(255 * cols_arr, (nb_points, 1)))
elif cols_arr.ndim == 2: # map color to each line
colors_mapper = np.repeat(lines_range, points_per_line, axis=0)
vtk_colors = numpy_to_vtk_colors(255 * cols_arr[colors_mapper])
else: # colormap
# get colors for each vertex
cols_arr = map_coordinates_3d_4d(cols_arr, points_array)
vtk_colors = numpy_support.numpy_to_vtk(cols_arr, deep=True)
color_is_scalar = True
vtk_colors.SetName("colors")
poly_data.GetPointData().SetScalars(vtk_colors)
return poly_data, color_is_scalar
class ImageContainer2D(UI):
"""A 2D container to hold an image.
Currently Supports:
- png and jpg/jpeg images
Attributes
----------
size: (float, float)
Image size (width, height) in pixels.
img : ImageData
The image loaded from the specified path.
"""
def __init__(self, img_path, position=(0, 0), size=(100, 100)):
"""Init class instance.
Parameters
----------
img_path : string
URL or local path of the image
position : (float, float), optional
Absolute coordinates (x, y) of the lower-left corner of the image.
size : (int, int), optional
Width and height in pixels of the image.
"""
super(ImageContainer2D, self).__init__(position)
self.img = load_image(img_path, as_vtktype=True)
self.set_img(self.img)
self.resize(size)
def _get_size(self):
lower_left_corner = self.texture_points.GetPoint(0)
upper_right_corner = self.texture_points.GetPoint(2)
size = np.array(upper_right_corner) - np.array(lower_left_corner)
return abs(size[:2])
def _setup(self):
"""Setup this UI Component.
Return an image as a 2D actor with a specific position.
Returns
-------
:class:`vtkTexturedActor2D`
"""
self.texture_polydata = PolyData()
self.texture_points = Points()
self.texture_points.SetNumberOfPoints(4)
polys = CellArray()
polys.InsertNextCell(4)
polys.InsertCellPoint(0)
polys.InsertCellPoint(1)
polys.InsertCellPoint(2)
polys.InsertCellPoint(3)
self.texture_polydata.SetPolys(polys)
tc = FloatArray()
tc.SetNumberOfComponents(2)
tc.SetNumberOfTuples(4)
tc.InsertComponent(0, 0, 0.0)
tc.InsertComponent(0, 1, 0.0)
tc.InsertComponent(1, 0, 1.0)
tc.InsertComponent(1, 1, 0.0)
tc.InsertComponent(2, 0, 1.0)
tc.InsertComponent(2, 1, 1.0)
tc.InsertComponent(3, 0, 0.0)
tc.InsertComponent(3, 1, 1.0)
self.texture_polydata.GetPointData().SetTCoords(tc)
texture_mapper = PolyDataMapper2D()
texture_mapper = set_input(texture_mapper, self.texture_polydata)
image = TexturedActor2D()
image.SetMapper(texture_mapper)
self.texture = Texture()
image.SetTexture(self.texture)
image_property = Property2D()
image_property.SetOpacity(1.0)
image.SetProperty(image_property)
self.actor = image
# Add default events listener to the VTK actor.
self.handle_events(self.actor)
def _get_actors(self):
"""Return the actors that compose this UI component."""
return [self.actor]
def _add_to_scene(self, scene):
"""Add all subcomponents or VTK props that compose this UI component.
Parameters
----------
scene : scene
"""
scene.add(self.actor)
def resize(self, size):
"""Resize the image.
Parameters
----------
size : (float, float)
image size (width, height) in pixels.
"""
# Update actor.
self.texture_points.SetPoint(0, 0, 0, 0.0)
self.texture_points.SetPoint(1, size[0], 0, 0.0)
self.texture_points.SetPoint(2, size[0], size[1], 0.0)
self.texture_points.SetPoint(3, 0, size[1], 0.0)
self.texture_polydata.SetPoints(self.texture_points)
def _set_position(self, coords):
"""Set the lower-left corner position of this UI component.
Parameters
----------
coords: (float, float)
Absolute pixel coordinates (x, y).
"""
self.actor.SetPosition(*coords)
def scale(self, factor):
"""Scale the image.
Parameters
----------
factor : (float, float)
Scaling factor (width, height) in pixels.
"""
self.resize(self.size * factor)
def set_img(self, img):
"""Modify the image used by the vtkTexturedActor2D.
Parameters
----------
img : imageData
"""
self.texture = set_input(self.texture, img)
class Rectangle2D(UI):
"""A 2D rectangle sub-classed from UI."""
def __init__(self,
size=(0, 0),
position=(0, 0),
color=(1, 1, 1),
opacity=1.0):
"""Initialize a rectangle.
Parameters
----------
size : (int, int)
The size of the rectangle (width, height) in pixels.
position : (float, float)
Coordinates (x, y) of the lower-left corner of the rectangle.
color : (float, float, float)
Must take values in [0, 1].
opacity : float
Must take values in [0, 1].
"""
super(Rectangle2D, self).__init__(position)
self.color = color
self.opacity = opacity
self.resize(size)
def _setup(self):
"""Set up this UI component.
Creating the polygon actor used internally.
"""
# Setup four points
size = (1, 1)
self._points = Points()
self._points.InsertNextPoint(0, 0, 0)
self._points.InsertNextPoint(size[0], 0, 0)
self._points.InsertNextPoint(size[0], size[1], 0)
self._points.InsertNextPoint(0, size[1], 0)
# Create the polygon
polygon = Polygon()
polygon.GetPointIds().SetNumberOfIds(4) # make a quad
polygon.GetPointIds().SetId(0, 0)
polygon.GetPointIds().SetId(1, 1)
polygon.GetPointIds().SetId(2, 2)
polygon.GetPointIds().SetId(3, 3)
# Add the polygon to a list of polygons
polygons = CellArray()
polygons.InsertNextCell(polygon)
# Create a PolyData
self._polygonPolyData = PolyData()
self._polygonPolyData.SetPoints(self._points)
self._polygonPolyData.SetPolys(polygons)
# Create a mapper and actor
mapper = PolyDataMapper2D()
mapper = set_input(mapper, self._polygonPolyData)
self.actor = Actor2D()
self.actor.SetMapper(mapper)
# Add default events listener to the VTK actor.
self.handle_events(self.actor)
def _get_actors(self):
"""Get the actors composing this UI component."""
return [self.actor]
def _add_to_scene(self, scene):
"""Add all subcomponents or VTK props that compose this UI component.
Parameters
----------
scene : scene
"""
scene.add(self.actor)
def _get_size(self):
# Get 2D coordinates of two opposed corners of the rectangle.
lower_left_corner = np.array(self._points.GetPoint(0)[:2])
upper_right_corner = np.array(self._points.GetPoint(2)[:2])
size = abs(upper_right_corner - lower_left_corner)
return size
@property
def width(self):
return self._points.GetPoint(2)[0]
@width.setter
def width(self, width):
self.resize((width, self.height))
@property
def height(self):
return self._points.GetPoint(2)[1]
@height.setter
def height(self, height):
self.resize((self.width, height))
def resize(self, size):
"""Set the button size.
Parameters
----------
size : (float, float)
Button size (width, height) in pixels.
"""
self._points.SetPoint(0, 0, 0, 0.0)
self._points.SetPoint(1, size[0], 0, 0.0)
self._points.SetPoint(2, size[0], size[1], 0.0)
self._points.SetPoint(3, 0, size[1], 0.0)
self._polygonPolyData.SetPoints(self._points)
mapper = PolyDataMapper2D()
mapper = set_input(mapper, self._polygonPolyData)
self.actor.SetMapper(mapper)
def _set_position(self, coords):
"""Set the lower-left corner position of this UI component.
Parameters
----------
coords: (float, float)
Absolute pixel coordinates (x, y).
"""
self.actor.SetPosition(*coords)
@property
def color(self):
"""Get the rectangle's color."""
color = self.actor.GetProperty().GetColor()
return np.asarray(color)
@color.setter
def color(self, color):
"""Set the rectangle's color.
Parameters
----------
color : (float, float, float)
RGB. Must take values in [0, 1].
"""
self.actor.GetProperty().SetColor(*color)
@property
def opacity(self):
"""Get the rectangle's opacity."""
return self.actor.GetProperty().GetOpacity()
@opacity.setter
def opacity(self, opacity):
"""Set the rectangle's opacity.
Parameters
----------
opacity : float
Degree of transparency. Must be between [0, 1].
"""
self.actor.GetProperty().SetOpacity(opacity)
class Button2D(UI):
"""A 2D overlay button and is of type vtkTexturedActor2D.
Currently supports::
- Multiple icons.
- Switching between icons.
"""
def __init__(self, icon_fnames, position=(0, 0), size=(30, 30)):
"""Init class instance.
Parameters
----------
icon_fnames : List(string, string)
((iconname, filename), (iconname, filename), ....)
position : (float, float), optional
Absolute coordinates (x, y) of the lower-left corner of the button.
size : (int, int), optional
Width and height in pixels of the button.
"""
super(Button2D, self).__init__(position)
self.icon_extents = dict()
self.icons = self._build_icons(icon_fnames)
self.icon_names = [icon[0] for icon in self.icons]
self.current_icon_id = 0
self.current_icon_name = self.icon_names[self.current_icon_id]
self.set_icon(self.icons[self.current_icon_id][1])
self.resize(size)
def _get_size(self):
lower_left_corner = self.texture_points.GetPoint(0)
upper_right_corner = self.texture_points.GetPoint(2)
size = np.array(upper_right_corner) - np.array(lower_left_corner)
return abs(size[:2])
def _build_icons(self, icon_fnames):
"""Convert file names to ImageData.
A pre-processing step to prevent re-read of file names during every
state change.
Parameters
----------
icon_fnames : List(string, string)
((iconname, filename), (iconname, filename), ....)
Returns
-------
icons : List
A list of corresponding ImageData.
"""
icons = []
for icon_name, icon_fname in icon_fnames:
icons.append((icon_name, load_image(icon_fname, as_vtktype=True)))
return icons
def _setup(self):
"""Set up this UI component.
Creating the button actor used internally.
"""
# This is highly inspired by
# https://github.com/Kitware/VTK/blob/c3ec2495b183e3327820e927af7f8f90d34c3474/Interaction/Widgets/vtkBalloonRepresentation.cxx#L47
self.texture_polydata = PolyData()
self.texture_points = Points()
self.texture_points.SetNumberOfPoints(4)
polys = CellArray()
polys.InsertNextCell(4)
polys.InsertCellPoint(0)
polys.InsertCellPoint(1)
polys.InsertCellPoint(2)
polys.InsertCellPoint(3)
self.texture_polydata.SetPolys(polys)
tc = FloatArray()
tc.SetNumberOfComponents(2)
tc.SetNumberOfTuples(4)
tc.InsertComponent(0, 0, 0.0)
tc.InsertComponent(0, 1, 0.0)
tc.InsertComponent(1, 0, 1.0)
tc.InsertComponent(1, 1, 0.0)
tc.InsertComponent(2, 0, 1.0)
tc.InsertComponent(2, 1, 1.0)
tc.InsertComponent(3, 0, 0.0)
tc.InsertComponent(3, 1, 1.0)
self.texture_polydata.GetPointData().SetTCoords(tc)
texture_mapper = PolyDataMapper2D()
texture_mapper = set_input(texture_mapper, self.texture_polydata)
button = TexturedActor2D()
button.SetMapper(texture_mapper)
self.texture = Texture()
button.SetTexture(self.texture)
button_property = Property2D()
button_property.SetOpacity(1.0)
button.SetProperty(button_property)
self.actor = button
# Add default events listener to the VTK actor.
self.handle_events(self.actor)
def _get_actors(self):
"""Get the actors composing this UI component."""
return [self.actor]
def _add_to_scene(self, scene):
"""Add all subcomponents or VTK props that compose this UI component.
Parameters
----------
scene : scene
"""
scene.add(self.actor)
def resize(self, size):
"""Resize the button.
Parameters
----------
size : (float, float)
Button size (width, height) in pixels.
"""
# Update actor.
self.texture_points.SetPoint(0, 0, 0, 0.0)
self.texture_points.SetPoint(1, size[0], 0, 0.0)
self.texture_points.SetPoint(2, size[0], size[1], 0.0)
self.texture_points.SetPoint(3, 0, size[1], 0.0)
self.texture_polydata.SetPoints(self.texture_points)
def _set_position(self, coords):
"""Set the lower-left corner position of this UI component.
Parameters
----------
coords: (float, float)
Absolute pixel coordinates (x, y).
"""
self.actor.SetPosition(*coords)
@property
def color(self):
"""Get the button's color."""
color = self.actor.GetProperty().GetColor()
return np.asarray(color)
@color.setter
def color(self, color):
"""Set the button's color.
Parameters
----------
color : (float, float, float)
RGB. Must take values in [0, 1].
"""
self.actor.GetProperty().SetColor(*color)
def scale(self, factor):
"""Scale the button.
Parameters
----------
factor : (float, float)
Scaling factor (width, height) in pixels.
"""
self.resize(self.size * factor)
def set_icon_by_name(self, icon_name):
"""Set the button icon using its name.
Parameters
----------
icon_name : str
"""
icon_id = self.icon_names.index(icon_name)
self.set_icon(self.icons[icon_id][1])
def set_icon(self, icon):
"""Modify the icon used by the vtkTexturedActor2D.
Parameters
----------
icon : imageData
"""
self.texture = set_input(self.texture, icon)
def next_icon_id(self):
"""Set the next icon ID while cycling through icons."""
self.current_icon_id += 1
if self.current_icon_id == len(self.icons):
self.current_icon_id = 0
self.current_icon_name = self.icon_names[self.current_icon_id]
def next_icon(self):
"""Increment the state of the Button.
Also changes the icon.
"""
self.next_icon_id()
self.set_icon(self.icons[self.current_icon_id][1])
def __init__(self,
directions,
indices,
values=None,
affine=None,
colors=None,
lookup_colormap=None,
linewidth=1,
symmetric=True):
if affine is not None:
w_pos = apply_affine(affine, np.asarray(indices).T)
valid_dirs = directions[indices]
num_dirs = len(np.nonzero(np.abs(valid_dirs).max(axis=-1) > 0)[0])
pnts_per_line = 2
points_array = np.empty((num_dirs * pnts_per_line, 3))
centers_array = np.empty_like(points_array, dtype=int)
diffs_array = np.empty_like(points_array)
line_count = 0
for idx, center in enumerate(zip(indices[0], indices[1], indices[2])):
if affine is None:
xyz = np.asarray(center)
else:
xyz = w_pos[idx, :]
valid_peaks = np.nonzero(
np.abs(valid_dirs[idx, :, :]).max(axis=-1) > 0.)[0]
for direction in valid_peaks:
if values is not None:
pv = values[center][direction]
else:
pv = 1.
if symmetric:
point_i = directions[center][direction] * pv + xyz
point_e = -directions[center][direction] * pv + xyz
else:
point_i = directions[center][direction] * pv + xyz
point_e = xyz
diff = point_e - point_i
points_array[line_count * pnts_per_line, :] = point_e
points_array[line_count * pnts_per_line + 1, :] = point_i
centers_array[line_count * pnts_per_line, :] = center
centers_array[line_count * pnts_per_line + 1, :] = center
diffs_array[line_count * pnts_per_line, :] = diff
diffs_array[line_count * pnts_per_line + 1, :] = diff
line_count += 1
vtk_points = numpy_to_vtk_points(points_array)
vtk_cells = _points_to_vtk_cells(points_array)
colors_tuple = _peaks_colors_from_points(points_array, colors=colors)
vtk_colors, colors_are_scalars, self.__global_opacity = colors_tuple
poly_data = PolyData()
poly_data.SetPoints(vtk_points)
poly_data.SetLines(vtk_cells)
poly_data.GetPointData().SetScalars(vtk_colors)
self.__mapper = PolyDataMapper()
self.__mapper.SetInputData(poly_data)
self.__mapper.ScalarVisibilityOn()
self.__mapper.SetScalarModeToUsePointFieldData()
self.__mapper.SelectColorArray('colors')
self.__mapper.Update()
self.SetMapper(self.__mapper)
attribute_to_actor(self, centers_array, 'center')
attribute_to_actor(self, diffs_array, 'diff')
vs_dec_code = import_fury_shader('peak_dec.vert')
vs_impl_code = import_fury_shader('peak_impl.vert')
fs_dec_code = import_fury_shader('peak_dec.frag')
fs_impl_code = import_fury_shader('peak_impl.frag')
shader_to_actor(self,
'vertex',
decl_code=vs_dec_code,
impl_code=vs_impl_code)
shader_to_actor(self, 'fragment', decl_code=fs_dec_code)
shader_to_actor(self,
'fragment',
impl_code=fs_impl_code,
block='light')
# Color scale with a lookup table
if colors_are_scalars:
if lookup_colormap is None:
lookup_colormap = colormap_lookup_table()
self.__mapper.SetLookupTable(lookup_colormap)
self.__mapper.UseLookupTableScalarRangeOn()
self.__mapper.Update()
self.__lw = linewidth
self.GetProperty().SetLineWidth(self.__lw)
if self.__global_opacity >= 0:
self.GetProperty().SetOpacity(self.__global_opacity)
self.__min_centers = np.min(indices, axis=1)
self.__max_centers = np.max(indices, axis=1)
self.__is_range = True
self.__low_ranges = self.__min_centers
self.__high_ranges = self.__max_centers
self.__cross_section = self.__high_ranges // 2
self.__mapper.AddObserver(Command.UpdateShaderEvent,
self.__display_peaks_vtk_callback)
def ribbon(molecule):
"""Create an actor for ribbon molecular representation.
Parameters
----------
molecule : Molecule
The molecule to be rendered.
Returns
-------
molecule_actor : vtkActor
Actor created to render the rubbon representation of the molecule to be
visualized.
References
----------
Richardson, J.S. The anatomy and taxonomy of protein structure
`Advances in Protein Chemistry, 1981, 34, 167-339.
<https://doi.org/10.1016/S0065-3233(08)60520-3>`_
"""
coords = get_all_atomic_positions(molecule)
all_atomic_numbers = get_all_atomic_numbers(molecule)
num_total_atoms = molecule.total_num_atoms
secondary_structures = np.ones(num_total_atoms)
for i in range(num_total_atoms):
secondary_structures[i] = ord('c')
resi = molecule.residue_seq[i]
for j, _ in enumerate(molecule.sheet):
sheet = molecule.sheet[j]
if molecule.chain[i] != sheet[0] or resi < sheet[1] or \
resi > sheet[3]:
continue
secondary_structures[i] = ord('s')
for j, _ in enumerate(molecule.helix):
helix = molecule.helix[j]
if molecule.chain[i] != helix[0] or resi < helix[1] or \
resi > helix[3]:
continue
secondary_structures[i] = ord('h')
output = PolyData()
# for atomic numbers
atomic_num_arr = nps.numpy_to_vtk(num_array=all_atomic_numbers,
deep=True,
array_type=VTK_ID_TYPE)
# setting the array name to atom_type as vtkProteinRibbonFilter requires
# the array to be named atom_type
atomic_num_arr.SetName("atom_type")
output.GetPointData().AddArray(atomic_num_arr)
# for atom names
atom_names = StringArray()
# setting the array name to atom_types as vtkProteinRibbonFilter requires
# the array to be named atom_types
atom_names.SetName("atom_types")
atom_names.SetNumberOfTuples(num_total_atoms)
for i in range(num_total_atoms):
atom_names.SetValue(i, molecule.atom_names[i])
output.GetPointData().AddArray(atom_names)
# for residue sequences
residue_seq = nps.numpy_to_vtk(num_array=molecule.residue_seq,
deep=True,
array_type=VTK_ID_TYPE)
residue_seq.SetName("residue")
output.GetPointData().AddArray(residue_seq)
# for chain
chain = nps.numpy_to_vtk(num_array=molecule.chain,
deep=True,
array_type=VTK_UNSIGNED_CHAR)
chain.SetName("chain")
output.GetPointData().AddArray(chain)
# for secondary structures
s_s = nps.numpy_to_vtk(num_array=secondary_structures,
deep=True,
array_type=VTK_UNSIGNED_CHAR)
s_s.SetName("secondary_structures")
output.GetPointData().AddArray(s_s)
# for secondary structures begin
newarr = np.ones(num_total_atoms)
s_sb = nps.numpy_to_vtk(num_array=newarr,
deep=True,
array_type=VTK_UNSIGNED_CHAR)
s_sb.SetName("secondary_structures_begin")
output.GetPointData().AddArray(s_sb)
# for secondary structures end
newarr = np.ones(num_total_atoms)
s_se = nps.numpy_to_vtk(num_array=newarr,
deep=True,
array_type=VTK_UNSIGNED_CHAR)
s_se.SetName("secondary_structures_end")
output.GetPointData().AddArray(s_se)
# for is_hetatm
is_hetatm = nps.numpy_to_vtk(num_array=molecule.is_hetatm,
deep=True,
array_type=VTK_UNSIGNED_CHAR)
is_hetatm.SetName("ishetatm")
output.GetPointData().AddArray(is_hetatm)
# for model
model = nps.numpy_to_vtk(num_array=molecule.model,
deep=True,
array_type=VTK_UNSIGNED_INT)
model.SetName("model")
output.GetPointData().AddArray(model)
table = PTable()
# for colors and radii of hetero-atoms
radii = np.ones((num_total_atoms, 3))
rgb = np.ones((num_total_atoms, 3))
for i in range(num_total_atoms):
radii[i] = np.repeat(table.atomic_radius(all_atomic_numbers[i], 'VDW'),
3)
rgb[i] = table.atom_color(all_atomic_numbers[i])
Rgb = nps.numpy_to_vtk(num_array=rgb,
deep=True,
array_type=VTK_UNSIGNED_CHAR)
Rgb.SetName("rgb_colors")
output.GetPointData().SetScalars(Rgb)
Radii = nps.numpy_to_vtk(num_array=radii, deep=True, array_type=VTK_FLOAT)
Radii.SetName("radius")
output.GetPointData().SetVectors(Radii)
# setting the coordinates
points = numpy_to_vtk_points(coords)
output.SetPoints(points)
ribbonFilter = ProteinRibbonFilter()
ribbonFilter.SetInputData(output)
ribbonFilter.SetCoilWidth(0.2)
ribbonFilter.SetDrawSmallMoleculesAsSpheres(0)
mapper = PolyDataMapper()
mapper.SetInputConnection(ribbonFilter.GetOutputPort())
molecule_actor = Actor()
molecule_actor.SetMapper(mapper)
return molecule_actor
