class JupyterRenderer:
def __init__(
self,
size=(640, 480),
compute_normals_mode=NORMAL.SERVER_SIDE,
default_shape_color=format_color(166, 166, 166), # light grey
default_edge_color=format_color(32, 32, 32), # dark grey
default_vertex_color=format_color(8, 8, 8), # darker grey
pick_color=format_color(232, 176, 36), # orange
background_color='white'):
""" Creates a jupyter renderer.
size: a tuple (width, height). Must be a square, or shapes will look like deformed
compute_normals_mode: optional, set to SERVER_SIDE by default. This flag lets you choose the
way normals are computed. If SERVER_SIDE is selected (default value), then normals
will be computed by the Tesselator, packed as a python tuple, and send as a json structure
to the client. If, on the other hand, CLIENT_SIDE is chose, then the computer only compute vertex
indices, and let the normals be computed by the client (the web js machine embedded in the webrowser).
* SERVER_SIDE: higher server load, loading time increased, lower client load. Poor performance client will
choose this option (mobile terminals for instance)
* CLIENT_SIDE: lower server load, loading time decreased, higher client load. Higher performance clients will
choose this option (laptops, desktop machines).
* default_shape_color
* default_e1dge_color:
* default_pick_color:
* background_color:
"""
self._default_shape_color = default_shape_color
self._default_edge_color = default_edge_color
self._default_vertex_color = default_vertex_color
self._pick_color = pick_color
self._background = background_color
self._background_opacity = 1
self._size = size
self._compute_normals_mode = compute_normals_mode
self._bb = None # the bounding box, necessary to compute camera position
# the default camera object
self._camera_target = [0., 0., 0.] # the point to look at
self._camera_position = [0, 0., 100.] # the camera initial position
self._camera = None
self._camera_distance_factor = 6
self._camera_initial_zoom = 2.5
# a dictionnary of all the shapes belonging to the renderer
# each element is a key 'mesh_id:shape'
self._shapes = {}
# we save the renderer so that is can be accessed
self._renderer = None
# the group of 3d and 2d objects to render
self._displayed_pickable_objects = Group()
# the group of other objects (grid, trihedron etc.) that can't be selected
self._displayed_non_pickable_objects = Group()
# event manager/selection manager
self._picker = None
self._current_shape_selection = None
self._current_mesh_selection = None
self._savestate = None
self._selection_color = format_color(232, 176, 36)
self._select_callbacks = [
] # a list of all functions called after an object is selected
# UI
self.layout = Layout(width='auto', height='auto')
self._toggle_shp_visibility_button = self.create_button(
"Hide/Show", "Toggle Shape Visibility", True,
self.toggle_shape_visibility)
self._shp_properties_button = Dropdown(options=[
'Compute', 'Inertia', 'Recognize Face', 'Aligned BBox',
'Oriented BBox'
],
value='Compute',
description='',
layout=self.layout,
disabled=True)
self._shp_properties_button.observe(self.on_compute_change)
self._remove_shp_button = self.create_button(
"Remove", "Permanently remove the shape from the Scene", True,
self.remove_shape)
self._controls = [
self.create_checkbox("axes", "Axes", True,
self.toggle_axes_visibility),
self.create_checkbox("grid", "Grid", True,
self.toggle_grid_visibility),
self.create_button("Reset View", "Restore default view", False,
self._reset), self._shp_properties_button,
self._toggle_shp_visibility_button, self._remove_shp_button
]
self.html = HTML("")
def create_button(self, description, tooltip, disabled, handler):
button = Button(disabled=disabled,
tooltip=tooltip,
description=description,
layout=self.layout)
button.on_click(handler)
return button
def create_checkbox(self, kind, description, value, handler):
checkbox = Checkbox(value=value,
description=description,
layout=self.layout)
checkbox.observe(handler, "value")
checkbox.add_class("view_%s" % kind)
return checkbox
def remove_shape(self, *kargs):
self.clicked_obj.visible = not self.clicked_obj.visible
# remove shape fro mthe mapping dict
cur_id = self.clicked_obj.name
del self._shapes[cur_id]
self._remove_shp_button.disabled = True
def on_compute_change(self, change):
if change['type'] == 'change' and change['name'] == 'value':
selection = change['new']
output = ""
if 'Inertia' in selection:
cog, mass, mass_property = measure_shape_mass_center_of_gravity(
self._current_shape_selection)
# display this point (type gp_Pnt)
self.DisplayShape([cog])
output += "<u><b>Center of Gravity</b></u>:<br><b>Xcog=</b>%.3f<br><b>Ycog=</b>%.3f<br><b>Zcog=</b>%.3f<br>" % (
cog.X(), cog.Y(), cog.Z())
output += "<u><b>%s=</b></u>:<b>%.3f</b><br>" % (mass_property,
mass)
elif 'Oriented' in selection:
center, dim, oobb_shp = get_oriented_boundingbox(
self._current_shape_selection)
self.DisplayShape(oobb_shp,
render_edges=True,
transparency=True,
opacity=0.2,
selectable=False)
output += "<u><b>OOBB center</b></u>:<br><b>X=</b>%.3f<br><b>Y=</b>%.3f<br><b>Z=</b>%.3f<br>" % (
center.X(), center.Y(), center.Z())
output += "<u><b>OOBB dimensions</b></u>:<br><b>dX=</b>%.3f<br><b>dY=</b>%.3f<br><b>dZ=</b>%.3f<br>" % (
dim[0], dim[1], dim[2])
output += "<u><b>OOBB volume</b></u>:<br><b>V=</b>%.3f<br>" % (
dim[0] * dim[1] * dim[2])
elif 'Aligned' in selection:
center, dim, albb_shp = get_aligned_boundingbox(
self._current_shape_selection)
self.DisplayShape(albb_shp,
render_edges=True,
transparency=True,
opacity=0.2,
selectable=False)
output += "<u><b>ABB center</b></u>:<br><b>X=</b>%.3f<br><b>Y=</b>%.3f<br><b>Z=</b>%.3f<br>" % (
center.X(), center.Y(), center.Z())
output += "<u><b>ABB dimensions</b></u>:<br><b>dX=</b>%.3f<br><b>dY=</b>%.3f<br><b>dZ=</b>%.3f<br>" % (
dim[0], dim[1], dim[2])
output += "<u><b>ABB volume</b></u>:<br><b>V=</b>%.3f<br>" % (
dim[0] * dim[1] * dim[2])
elif 'Recognize' in selection:
# try featrue recognition
kind, pnt, vec = recognize_face(self._current_shape_selection)
output += "<u><b>Type</b></u>: %s<br>" % kind
if kind == "Plane":
self.DisplayShape([pnt])
output += "<u><b>Properties</b></u>:<br>"
output += "<u><b>Point</b></u>:<br><b>X=</b>%.3f<br><b>Y=</b>%.3f<br><b>Z=</b>%.3f<br>" % (
pnt.X(), pnt.Y(), pnt.Z())
output += "<u><b>Normal</b></u>:<br><b>u=</b>%.3f<br><b>v=</b>%.3f<br><b>w=</b>%.3f<br>" % (
vec.X(), vec.Y(), vec.Z())
elif kind == "Cylinder":
self.DisplayShape([pnt])
output += "<u><b>Properties</b></u>:<br>"
output += "<u><b>Axis point</b></u>:<br><b>X=</b>%.3f<br><b>Y=</b>%.3f<br><b>Z=</b>%.3f<br>" % (
pnt.X(), pnt.Y(), pnt.Z())
output += "<u><b>Axis direction</b></u>:<br><b>u=</b>%.3f<br><b>v=</b>%.3f<br><b>w=</b>%.3f<br>" % (
vec.X(), vec.Y(), vec.Z())
self.html.value = output
def toggle_shape_visibility(self, *kargs):
self.clicked_obj.visible = not self.clicked_obj.visible
def toggle_axes_visibility(self, change):
self.axes.set_visibility(_bool_or_new(change))
def toggle_grid_visibility(self, change):
self.horizontal_grid.set_visibility(_bool_or_new(change))
self.vertical_grid.set_visibility(_bool_or_new(change))
def click(self, value):
""" called whenever a shape or edge is clicked
"""
obj = value.owner.object
self.clicked_obj = obj
if self._current_mesh_selection != obj:
if self._current_mesh_selection is not None:
self._current_mesh_selection.material.color = self._current_selection_material_color
self._current_mesh_selection.material.transparent = False
self._current_mesh_selection = None
self._current_selection_material_color = None
self._shp_properties_button.value = "Compute"
self._shp_properties_button.disabled = True
self._toggle_shp_visibility_button.disabled = True
self._remove_shp_button.disabled = True
self._current_shape_selection = None
if obj is not None:
self._shp_properties_button.disabled = False
self._toggle_shp_visibility_button.disabled = False
self._remove_shp_button.disabled = False
id_clicked = obj.name # the mesh id clicked
self._current_mesh_selection = obj
self._current_selection_material_color = obj.material.color
obj.material.color = self._selection_color
# selected part becomes transparent
obj.material.transparent = True
obj.material.opacity = 0.5
# get the shape from this mesh id
selected_shape = self._shapes[id_clicked]
html_value = "<b>Shape type:</b> %s<br>" % get_type_as_string(
selected_shape)
html_value += "<b>Shape id:</b> %s<br>" % id_clicked
self.html.value = html_value
self._current_shape_selection = selected_shape
else:
self.html.value = "<b>Shape type:</b> None<br><b>Shape id:</b> None"
# then execute calbacks
for callback in self._select_callbacks:
callback(self._current_shape_selection)
def register_select_callback(self, callback):
""" Adds a callback that will be called each time a shape is selected
"""
if not callable(callback):
raise AssertionError(
"You must provide a callable to register the callback")
else:
self._select_callbacks.append(callback)
def unregister_callback(self, callback):
""" Remove a callback from the callback list
"""
if callback not in self._select_callbacks:
raise AssertionError("This callback is not registered")
else:
self._select_callbacks.remove(callback)
def GetSelectedShape(self):
""" Returns the selected shape
"""
return self._current_shape_selection
def DisplayShapeAsSVG(self,
shp,
export_hidden_edges=True,
location=gp_Pnt(0, 0, 0),
direction=gp_Dir(1, 1, 1),
color="black",
line_width=0.5):
svg_string = export_shape_to_svg(
shp,
export_hidden_edges=export_hidden_edges,
location=location,
direction=direction,
color=color,
line_width=line_width,
margin_left=0,
margin_top=0)
svg = SVG(data=svg_string)
display(svg)
def DisplayShape(self,
shp,
shape_color=None,
render_edges=False,
edge_color=None,
edge_deflection=0.05,
vertex_color=None,
quality=1.0,
transparency=False,
opacity=1.,
topo_level='default',
update=False,
selectable=True):
""" Displays a topods_shape in the renderer instance.
shp: the TopoDS_Shape to render
shape_color: the shape color, in html corm, eg '#abe000'
render_edges: optional, False by default. If True, compute and dislay all
edges as a linear interpolation of segments.
edge_color: optional, black by default. The color used for edge rendering,
in html form eg '#ff00ee'
edge_deflection: optional, 0.05 by default
vertex_color: optional
quality: optional, 1.0 by default. If set to something lower than 1.0,
mesh will be more precise. If set to something higher than 1.0,
mesh will be less precise, i.e. lower numer of triangles.
transparency: optional, False by default (opaque).
opacity: optional, float, by default to 1 (opaque). if transparency is set to True,
0. is fully opaque, 1. is fully transparent.
topo_level: "default" by default. The value should be either "compound", "shape", "vertex".
update: optional, False by default. If True, render all the shapes.
selectable: if True, can be doubleclicked from the 3d window
"""
if edge_color is None:
edge_color = self._default_edge_color
if shape_color is None:
shape_color = self._default_shape_color
if vertex_color is None:
vertex_color = self._default_vertex_color
output = [] # a list of all geometries created from the shape
# is it list of gp_Pnt ?
if isinstance(shp, list) and isinstance(shp[0], gp_Pnt):
result = self.AddVerticesToScene(shp, vertex_color)
output.append(result)
# or a 1d element such as edge or wire ?
elif is_wire(shp) or is_edge(shp):
result = self.AddCurveToScene(shp, edge_color, edge_deflection)
output.append(result)
elif topo_level != "default":
t = TopologyExplorer(shp)
map_type_and_methods = {
"Solid": t.solids,
"Face": t.faces,
"Shell": t.shells,
"Compound": t.compounds,
"Compsolid": t.comp_solids
}
for subshape in map_type_and_methods[topo_level]():
result = self.AddShapeToScene(subshape, shape_color,
render_edges, edge_color,
vertex_color, quality,
transparency, opacity)
output.append(result)
else:
result = self.AddShapeToScene(shp, shape_color, render_edges,
edge_color, vertex_color, quality,
transparency, opacity)
output.append(result)
if selectable: # Add geometries to pickable or non pickable objects
for elem in output:
self._displayed_pickable_objects.add(elem)
if update:
self.Display()
def AddVerticesToScene(self, pnt_list, vertex_color, vertex_width=5):
""" shp is a list of gp_Pnt
"""
vertices_list = [] # will be passed to pythreejs
BB = BRep_Builder()
compound = TopoDS_Compound()
BB.MakeCompound(compound)
for vertex in pnt_list:
vertex_to_add = BRepBuilderAPI_MakeVertex(vertex).Shape()
BB.Add(compound, vertex_to_add)
vertices_list.append([vertex.X(), vertex.Y(), vertex.Z()])
# map the Points and the AIS_PointCloud
# and to the dict of shapes, to have a mapping between meshes and shapes
point_cloud_id = "%s" % uuid.uuid4().hex
self._shapes[point_cloud_id] = compound
vertices_list = np.array(vertices_list, dtype=np.float32)
attributes = {
"position": BufferAttribute(vertices_list, normalized=False)
}
mat = PointsMaterial(color=vertex_color,
sizeAttenuation=True,
size=vertex_width)
geom = BufferGeometry(attributes=attributes)
points = Points(geometry=geom, material=mat, name=point_cloud_id)
return points
def AddCurveToScene(self, shp, edge_color, deflection):
""" shp is either a TopoDS_Wire or a TopodS_Edge.
"""
if is_edge(shp):
pnts = discretize_edge(shp, deflection)
elif is_wire(shp):
pnts = discretize_wire(shp, deflection)
np_edge_vertices = np.array(pnts, dtype=np.float32)
np_edge_indices = np.arange(np_edge_vertices.shape[0], dtype=np.uint32)
edge_geometry = BufferGeometry(
attributes={
'position': BufferAttribute(np_edge_vertices),
'index': BufferAttribute(np_edge_indices)
})
edge_material = LineBasicMaterial(color=edge_color, linewidth=1)
# and to the dict of shapes, to have a mapping between meshes and shapes
edge_id = "%s" % uuid.uuid4().hex
self._shapes[edge_id] = shp
edge_line = Line(geometry=edge_geometry,
material=edge_material,
name=edge_id)
# and to the dict of shapes, to have a mapping between meshes and shapes
edge_id = "%s" % uuid.uuid4().hex
self._shapes[edge_id] = shp
return edge_line
def AddShapeToScene(
self,
shp,
shape_color=None, # the default
render_edges=False,
edge_color=None,
vertex_color=None,
quality=1.0,
transparency=False,
opacity=1.):
# first, compute the tesselation
tess = Tesselator(shp)
tess.Compute(compute_edges=render_edges,
mesh_quality=quality,
parallel=True)
# get vertices and normals
vertices_position = tess.GetVerticesPositionAsTuple()
number_of_triangles = tess.ObjGetTriangleCount()
number_of_vertices = len(vertices_position)
# number of vertices should be a multiple of 3
if number_of_vertices % 3 != 0:
raise AssertionError("Wrong number of vertices")
if number_of_triangles * 9 != number_of_vertices:
raise AssertionError("Wrong number of triangles")
# then we build the vertex and faces collections as numpy ndarrays
np_vertices = np.array(vertices_position, dtype='float32').reshape(
int(number_of_vertices / 3), 3)
# Note: np_faces is just [0, 1, 2, 3, 4, 5, ...], thus arange is used
np_faces = np.arange(np_vertices.shape[0], dtype='uint32')
# set geometry properties
buffer_geometry_properties = {
'position': BufferAttribute(np_vertices),
'index': BufferAttribute(np_faces)
}
if self._compute_normals_mode == NORMAL.SERVER_SIDE:
# get the normal list, converts to a numpy ndarray. This should not raise
# any issue, since normals have been computed by the server, and are available
# as a list of floats
np_normals = np.array(tess.GetNormalsAsTuple(),
dtype='float32').reshape(-1, 3)
# quick check
if np_normals.shape != np_vertices.shape:
raise AssertionError("Wrong number of normals/shapes")
buffer_geometry_properties['normal'] = BufferAttribute(np_normals)
# build a BufferGeometry instance
shape_geometry = BufferGeometry(attributes=buffer_geometry_properties)
# if the client has to render normals, add the related js instructions
if self._compute_normals_mode == NORMAL.CLIENT_SIDE:
shape_geometry.exec_three_obj_method('computeVertexNormals')
# then a default material
shp_material = self._material(shape_color,
transparent=transparency,
opacity=opacity)
# and to the dict of shapes, to have a mapping between meshes and shapes
mesh_id = "%s" % uuid.uuid4().hex
self._shapes[mesh_id] = shp
# finally create the mesh
shape_mesh = Mesh(geometry=shape_geometry,
material=shp_material,
name=mesh_id)
# edge rendering, if set to True
if render_edges:
edges = list(
map(
lambda i_edge: [
tess.GetEdgeVertex(i_edge, i_vert)
for i_vert in range(tess.ObjEdgeGetVertexCount(i_edge))
], range(tess.ObjGetEdgeCount())))
edge_list = _flatten(list(map(_explode, edges)))
lines = LineSegmentsGeometry(positions=edge_list)
mat = LineMaterial(linewidth=1, color=edge_color)
edge_lines = LineSegments2(lines, mat)
self._displayed_non_pickable_objects.add(edge_lines)
return shape_mesh
def _scale(self, vec):
r = self._bb._max_dist_from_center() * self._camera_distance_factor
n = np.linalg.norm(vec)
new_vec = [v / n * r for v in vec]
return new_vec
def _material(self, color, transparent=False, opacity=1.0):
#material = MeshPhongMaterial()
material = CustomMaterial("standard")
material.color = color
material.clipping = True
material.side = "DoubleSide"
material.polygonOffset = True
material.polygonOffsetFactor = 1
material.polygonOffsetUnits = 1
material.transparent = transparent
material.opacity = opacity
material.update("metalness", 0.3)
material.update("roughness", 0.8)
return material
def EraseAll(self):
self._shapes = {}
self._displayed_pickable_objects = Group()
self._current_shape_selection = None
self._current_mesh_selection = None
self._current_selection_material = None
self._renderer.scene = Scene(children=[])
def Display(self, position=None, rotation=None):
# Get the overall bounding box
if self._shapes:
self._bb = BoundingBox([self._shapes.values()])
else: # if nothing registered yet, create a fake bb
self._bb = BoundingBox([[BRepPrimAPI_MakeSphere(5.).Shape()]])
bb_max = self._bb.max
orbit_radius = 1.5 * self._bb._max_dist_from_center()
# Set up camera
camera_target = self._bb.center
camera_position = _add(
self._bb.center,
self._scale(
[1, 1, 1] if position is None else self._scale(position)))
camera_zoom = self._camera_initial_zoom
self._camera = CombinedCamera(position=camera_position,
width=self._size[0],
height=self._size[1])
self._camera.up = (0.0, 0.0, 1.0)
self._camera.mode = 'orthographic'
self._camera_target = camera_target
self._camera.position = camera_position
if rotation is not None:
self._camera.rotation = rotation
# Set up lights in every of the 8 corners of the global bounding box
positions = list(
itertools.product(*[(-orbit_radius, orbit_radius)] * 3))
key_lights = [
DirectionalLight(color='white', position=pos, intensity=0.5)
for pos in positions
]
ambient_light = AmbientLight(intensity=0.1)
# Set up Helpers
self.axes = Axes(bb_center=self._bb.center, length=bb_max * 1.1)
self.horizontal_grid = Grid(bb_center=self._bb.center,
maximum=bb_max,
colorCenterLine='#aaa',
colorGrid='#ddd')
self.vertical_grid = Grid(bb_center=self._bb.center,
maximum=bb_max,
colorCenterLine='#aaa',
colorGrid='#ddd')
# Set up scene
environment = self.axes.axes + key_lights + [
ambient_light, self.horizontal_grid.grid, self.vertical_grid.grid,
self._camera
]
scene_shp = Scene(children=[
self._displayed_pickable_objects,
self._displayed_non_pickable_objects
] + environment)
# Set up Controllers
self._controller = OrbitControls(controlling=self._camera,
target=camera_target,
target0=camera_target)
# Update controller to instantiate camera position
self._camera.zoom = camera_zoom
self._update()
# setup Picker
self._picker = Picker(controlling=self._displayed_pickable_objects,
event='dblclick')
self._picker.observe(self.click)
self._renderer = Renderer(camera=self._camera,
background=self._background,
background_opacity=self._background_opacity,
scene=scene_shp,
controls=[self._controller, self._picker],
width=self._size[0],
height=self._size[1],
antialias=True)
# set rotation and position for each grid
self.horizontal_grid.set_position((0, 0, 0))
self.horizontal_grid.set_rotation((math.pi / 2.0, 0, 0, "XYZ"))
self.vertical_grid.set_position((0, -bb_max, 0))
self._savestate = (self._camera.rotation, self._controller.target)
# then display both 3d widgets and webui
display(HBox([VBox([HBox(self._controls), self._renderer]),
self.html]))
def ExportToHTML(self, filename):
embed.embed_minimal_html(filename,
views=self._renderer,
title='pythonocc')
def _reset(self, *kargs):
self._camera.rotation, self._controller.target = self._savestate
self._camera.position = _add(self._bb.center, self._scale((1, 1, 1)))
self._camera.zoom = self._camera_initial_zoom
self._update()
def _update(self):
self._controller.exec_three_obj_method('update')
def __repr__(self):
self.Display()
return ""
class JupyterRenderer(object):
def __init__(self,
size=(640, 480),
compute_normals_mode=NORMAL.SERVER_SIDE,
parallel=False):
""" Creates a jupyter renderer.
size: a tuple (width, height). Must be a square, or shapes will look like deformed
compute_normals_mode: optional, set to SERVER_SIDE by default. This flag lets you choose the
way normals are computed. If SERVER_SIDE is selected (default value), then normals
will be computed by the Tesselator, packed as a python tuple, and send as a json structure
to the client. If, on the other hand, CLIENT_SIDE is chose, then the computer only compute vertex
indices, and let the normals be computed by the client (the web js machine embedded in the webrowser).
* SERVER_SIDE: higher server load, loading time increased, lower client load. Poor performance client will
choose this option (mobile terminals for instance)
* CLIENT_SIDE: lower server load, loading time decreased, higher client load. Higher performance clients will
choose this option (laptops, desktop machines).
* parallel: optional, False by default. If set to True, meshing runs in parallelized mode.
"""
self._background = 'white'
self._background_opacity = 1
self._size = size
self._compute_normals_mode = compute_normals_mode
self._parallel = parallel
self.html = HTML("Selected shape : None")
self._bb = None # the bounding box, necessary to compute camera position
# the default camera object
self._camera_target = [0., 0., 0.] # the point to look at
self._camera_position = [0, 0., 100.] # the camera initial position
self._camera = None
# a dictionnary of all the shapes belonging to the renderer
# each element is a key 'mesh_id:shape'
self._shapes = {}
# we save the renderer so that is can be accessed
self._renderer = None
# the group of 3d and 2d objects to render
self._displayed_pickable_objects = Group()
# the group of other objects (grid, trihedron etc.) that can't be selected
self._displayed_non_pickable_objects = Group()
# event manager/selection manager
self._picker = Picker(controlling=self._displayed_pickable_objects, event='mousedown')
self._current_shape_selection = None
self._current_mesh_selection = None
self._selection_color = format_color(232, 176, 36)
self._select_callbacks = [] # a list of all functions called after an object is selected
def click(value):
""" called whenever a shape or edge is clicked
"""
obj = value.owner.object
if self._current_mesh_selection is not None:
self._current_mesh_selection.material.color = self._current_selection_material_color
if obj is not None:
id_clicked = obj.name # the mesh id clicked
self._current_mesh_selection = obj
self._current_selection_material_color = obj.material.color
obj.material.color = self._selection_color
# get the shape from this mesh id
selected_shape = self._shapes[id_clicked]
html_value = "<b>Shape type:</b> %s<br>" % get_type_as_string(selected_shape)
html_value += "<b>Shape id:</b> %s<br>" % selected_shape
self.html.value = html_value
self._current_shape_selection = selected_shape
else:
self.html.value = "<b>Shape type:</b> None<br><b>Shape id:</b> None"
# then execute calbacks
for callback in self._select_callbacks:
callback(self._current_shape_selection)
self._picker.observe(click)
def register_select_callback(self, callback):
""" Adds a callback that will be called each time a shape is selected
"""
if not callable(callback):
raise AssertionError("You must provide a callable to register the callback")
else:
self._select_callbacks.append(callback)
def unregister_callback(self, callback):
""" Remove a callback from the callback list
"""
if not callback in self._select_callbacks:
raise AssertionError("This callback is not registered")
else:
self._select_callbacks.remove(callback)
def GetSelectedShape(self):
""" Returns the selected shape
"""
return self._current_shape_selection
def DisplayMesh(self,
mesh,
color=default_mesh_color):
""" Display a MEFISTO2 triangle mesh
"""
if not HAVE_SMESH:
print("SMESH not installed, DisplayMesh method unavailable.")
return
if not isinstance(mesh, SMESH_Mesh):
raise AssertionError("You mush provide an SMESH_Mesh instance")
mesh_ds = mesh.GetMeshDS() # the mesh data source
face_iter = mesh_ds.facesIterator()
# vertices positions are stored to a liste
vertices_position = []
for _ in range(mesh_ds.NbFaces()-1):
face = face_iter.next()
#print('Face %i, type %i' % (i, face.GetType()))
#print(dir(face))
# if face.GetType == 3 : triangle mesh, then 3 nodes
for j in range(3):
node = face.GetNode(j)
#print('Coordinates of node %i:(%f,%f,%f)'%(i, node.X(), node.Y(), node.Z()))
vertices_position.append(node.X())
vertices_position.append(node.Y())
vertices_position.append(node.Z())
number_of_vertices = len(vertices_position)
# then we build the vertex and faces collections as numpy ndarrays
np_vertices = np.array(vertices_position, dtype='float32').reshape(int(number_of_vertices / 3), 3)
# Note: np_faces is just [0, 1, 2, 3, 4, 5, ...], thus arange is used
np_faces = np.arange(np_vertices.shape[0], dtype='uint32')
# set geometry properties
buffer_geometry_properties = {'position': BufferAttribute(np_vertices),
'index' : BufferAttribute(np_faces)}
# build a BufferGeometry instance
mesh_geometry = BufferGeometry(attributes=buffer_geometry_properties)
mesh_geometry.exec_three_obj_method('computeVertexNormals')
# then a default material
mesh_material = MeshPhongMaterial(color=color,
polygonOffset=True,
polygonOffsetFactor=1,
polygonOffsetUnits=1,
shininess=0.5,
wireframe=False,
side='DoubleSide')
edges_material = MeshPhongMaterial(color='black',
polygonOffset=True,
polygonOffsetFactor=1,
polygonOffsetUnits=1,
shininess=0.5,
wireframe=True)
# create a mesh unique id
mesh_id = uuid.uuid4().hex
# finally create the mash
shape_mesh = Mesh(geometry=mesh_geometry,
material=mesh_material,
name=mesh_id)
edges_mesh = Mesh(geometry=mesh_geometry,
material=edges_material,
name=mesh_id)
# a special display for the mesh
camera_target = [0., 0., 0.] # the point to look at
camera_position = [0, 0., 100.] # the camera initial position
camera = PerspectiveCamera(position=camera_position,
lookAt=camera_target,
up=[0, 0, 1],
fov=50,
children=[DirectionalLight(color='#ffffff',
position=[50, 50, 50],
intensity=0.9)])
scene_shp = Scene(children=[shape_mesh, edges_mesh, camera, AmbientLight(color='#101010')])
renderer = Renderer(camera=camera,
background=self._background,
background_opacity=self._background_opacity,
scene=scene_shp,
controls=[OrbitControls(controlling=camera, target=camera_target)],
width=self._size[0],
height=self._size[1],
antialias=True)
display(renderer)
def DisplayShape(self,
shp, # the TopoDS_Shape to be displayed
shape_color=default_shape_color, # the default
render_edges=False,
edge_color=default_edge_color,
compute_uv_coords=False,
quality=1.0,
transparency=False,
opacity=1.,
topo_level='default',
update=False):
""" Displays a topods_shape in the renderer instance.
shp: the TopoDS_Shape to render
shape_color: the shape color, in html corm, eg '#abe000'
render_edges: optional, False by default. If True, compute and dislay all
edges as a linear interpolation of segments.
edge_color: optional, black by default. The color used for edge rendering,
in html form eg '#ff00ee'
compute_uv_coords: optional, false by default. If True, compute texture
coordinates (required if the shape has to be textured)
quality: optional, 1.0 by default. If set to something lower than 1.0,
mesh will be more precise. If set to something higher than 1.0,
mesh will be less precise, i.e. lower numer of triangles.
transparency: optional, False by default (opaque).
opacity: optional, float, by default to 1 (opaque). if transparency is set to True,
0. is fully opaque, 1. is fully transparent.
topo_level: "default" by default. The value should be either "compound", "shape", "vertex".
update: optional, False by default. If True, render all the shapes.
"""
if is_wire(shp) or is_edge(shp):
self.AddCurveToScene(shp, shape_color)
if topo_level != "default":
t = TopologyExplorer(shp)
map_type_and_methods = {"Solid": t.solids, "Face": t.faces, "Shell": t.shells,
"Compound": t.compounds, "Compsolid": t.comp_solids}
for subshape in map_type_and_methods[topo_level]():
self.AddShapeToScene(subshape, shape_color, render_edges, edge_color, compute_uv_coords, quality,
transparency, opacity)
else:
self.AddShapeToScene(shp, shape_color, render_edges, edge_color, compute_uv_coords, quality,
transparency, opacity)
if update:
self.Display()
def AddCurveToScene(self, shp, color):
""" shp is either a TopoDS_Wire or a TopodS_Edge.
"""
if is_edge(shp):
pnts = discretize_edge(shp)
elif is_wire(shp):
pnts = discretize_wire(shp)
np_edge_vertices = np.array(pnts, dtype=np.float32)
np_edge_indices = np.arange(np_edge_vertices.shape[0], dtype=np.uint32)
edge_geometry = BufferGeometry(attributes={
'position': BufferAttribute(np_edge_vertices),
'index' : BufferAttribute(np_edge_indices)
})
edge_material = LineBasicMaterial(color=color, linewidth=1)
edge_lines = Line(geometry=edge_geometry, material=edge_material)
# Add geometries to pickable or non pickable objects
self._displayed_pickable_objects.add(edge_lines)
def AddShapeToScene(self,
shp, # the TopoDS_Shape to be displayed
shape_color=default_shape_color, # the default
render_edges=False,
edge_color=default_edge_color,
compute_uv_coords=False,
quality=1.0,
transparency=False,
opacity=1.):
# first, compute the tesselation
tess = Tesselator(shp)
tess.Compute(uv_coords=compute_uv_coords,
compute_edges=render_edges,
mesh_quality=quality,
parallel=self._parallel)
# get vertices and normals
vertices_position = tess.GetVerticesPositionAsTuple()
number_of_triangles = tess.ObjGetTriangleCount()
number_of_vertices = len(vertices_position)
# number of vertices should be a multiple of 3
if number_of_vertices % 3 != 0:
raise AssertionError("Wrong number of vertices")
if number_of_triangles * 9 != number_of_vertices:
raise AssertionError("Wrong number of triangles")
# then we build the vertex and faces collections as numpy ndarrays
np_vertices = np.array(vertices_position, dtype='float32').reshape(int(number_of_vertices / 3), 3)
# Note: np_faces is just [0, 1, 2, 3, 4, 5, ...], thus arange is used
np_faces = np.arange(np_vertices.shape[0], dtype='uint32')
# set geometry properties
buffer_geometry_properties = {'position': BufferAttribute(np_vertices),
'index' : BufferAttribute(np_faces)}
if self._compute_normals_mode == NORMAL.SERVER_SIDE:
# get the normal list, converts to a numpy ndarray. This should not raise
# any issue, since normals have been computed by the server, and are available
# as a list of floats
np_normals = np.array(tess.GetNormalsAsTuple(), dtype='float32').reshape(-1, 3)
# quick check
if np_normals.shape != np_vertices.shape:
raise AssertionError("Wrong number of normals/shapes")
buffer_geometry_properties['normal'] = BufferAttribute(np_normals)
# build a BufferGeometry instance
shape_geometry = BufferGeometry(attributes=buffer_geometry_properties)
# if the client has to render normals, add the related js instructions
if self._compute_normals_mode == NORMAL.CLIENT_SIDE:
shape_geometry.exec_three_obj_method('computeVertexNormals')
# then a default material
shp_material = self._material(shape_color, transparent=transparency, opacity=opacity)
# create a mesh unique id
mesh_id = uuid.uuid4().hex
# finally create the mash
shape_mesh = Mesh(geometry=shape_geometry,
material=shp_material,
name=mesh_id)
# and to the dict of shapes, to have a mapping between meshes and shapes
self._shapes[mesh_id] = shp
# edge rendering, if set to True
edge_lines = None
if render_edges:
edges = list(map(lambda i_edge: [tess.GetEdgeVertex(i_edge, i_vert) for i_vert in range(tess.ObjEdgeGetVertexCount(i_edge))], range(tess.ObjGetEdgeCount())))
edges = list(filter(lambda edge: len(edge) == 2, edges))
np_edge_vertices = np.array(edges, dtype=np.float32).reshape(-1, 3)
np_edge_indices = np.arange(np_edge_vertices.shape[0], dtype=np.uint32)
edge_geometry = BufferGeometry(attributes={
'position': BufferAttribute(np_edge_vertices),
'index' : BufferAttribute(np_edge_indices)
})
edge_material = LineBasicMaterial(color=edge_color, linewidth=1)
edge_lines = LineSegments(geometry=edge_geometry, material=edge_material)
# Add geometries to pickable or non pickable objects
self._displayed_pickable_objects.add(shape_mesh)
if render_edges:
self._displayed_non_pickable_objects.add(edge_lines)
def _scale(self, vec):
r = self._bb.diagonal * 2.5
n = np.linalg.norm(vec)
new_vec = [v / n * r for v in vec]
return self._add(new_vec, self._bb.center)
def _add(self, vec1, vec2):
return list(v1 + v2 for v1, v2 in zip(vec1, vec2))
def _material(self, color, transparent=False, opacity=1.0):
material = CustomMaterial("standard")
material.color = color
material.clipping = True
material.side = "DoubleSide"
material.alpha = 0.7
material.polygonOffset = False
material.polygonOffsetFactor = 1
material.polygonOffsetUnits = 1
material.transparent = transparent
material.opacity = opacity
material.update("metalness", 0.3)
material.update("roughness", 0.8)
return material
def EraseAll(self):
self._shapes = {}
self._displayed_pickable_objects = Group()
self._current_shape_selection = None
self._current_mesh_selection = None
self._current_selection_material = None
self._renderer.scene = Scene(children=[])
def Display(self):
# Get the overall bounding box
if self._shapes:
self._bb = BoundingBox([self._shapes.values()])
else: # if nothing registered yet, create a fake bb
self._bb = BoundingBox([[BRepPrimAPI_MakeSphere(5.).Shape()]])
bb_max = self._bb.max
bb_diag = 2 * self._bb.diagonal
# Set up camera
camera_target = self._bb.center
camera_position = self._scale([1, 1, 1])
self._camera = CombinedCamera(position=camera_position,
width=self._size[0], height=self._size[1],
far=10 * bb_diag, orthoFar=10 * bb_diag)
self._camera.up = (0.0, 0.0, 1.0)
self._camera.lookAt(camera_target)
self._camera.mode = 'orthographic'
self._camera_target = camera_target
self._camera.position = camera_position
# Set up lights in every of the 8 corners of the global bounding box
key_lights = [
DirectionalLight(color='white', position=position, intensity=0.12)
for position in list(itertools.product((-bb_diag, bb_diag), (-bb_diag, bb_diag), (-bb_diag, bb_diag)))
]
ambient_light = AmbientLight(intensity=1.0)
# Set up Helpers
self.axes = Axes(bb_center=self._bb.center, length=bb_max * 1.1)
self.grid = Grid(bb_center=self._bb.center, maximum=bb_max, colorCenterLine='#aaa', colorGrid='#ddd')
# Set up scene
environment = self.axes.axes + key_lights + [ambient_light, self.grid.grid, self._camera]
scene_shp = Scene(children=[self._displayed_pickable_objects,
self._displayed_non_pickable_objects] + environment)
# Set up Controllers
self._controller = OrbitControls(controlling=self._camera, target=camera_target)
self._renderer = Renderer(camera=self._camera,
background=self._background,
background_opacity=self._background_opacity,
scene=scene_shp,
controls=[self._controller, self._picker],
width=self._size[0],
height=self._size[1],
antialias=True)
# needs to be done after setup of camera
self.grid.set_rotation((math.pi / 2.0, 0, 0, "XYZ"))
self.grid.set_position((0, 0, 0))
# Workaround: Zoom forth and back to update frame. Sometimes necessary :(
self._camera.zoom = 1.01
self._update()
self._camera.zoom = 1.0
self._update()
# then display both 3d widgets and webui
display(HBox([self._renderer, self.html]))
def _update(self):
self._controller.exec_three_obj_method('update')
def __repr__(self):
self.Display()
return ""
class JupyterRenderer(object):
def __init__(self,
size=(640, 480),
compute_normals_mode=NORMAL.SERVER_SIDE,
parallel=False):
""" Creates a jupyter renderer.
size: a tuple (width, height). Must be a square, or shapes will look like deformed
compute_normals_mode: optional, set to SERVER_SIDE by default. This flag lets you choose the
way normals are computed. If SERVER_SIDE is selected (default value), then normals
will be computed by the Tesselator, packed as a python tuple, and send as a json structure
to the client. If, on the other hand, CLIENT_SIDE is chose, then the computer only compute vertex
indices, and let the normals be computed by the client (the web js machine embedded in the webrowser).
* SERVER_SIDE: higher server load, loading time increased, lower client load. Poor performance client will
choose this option (mobile terminals for instance)
* CLIENT_SIDE: lower server load, loading time decreased, higher client load. Higher performance clients will
choose this option (laptops, desktop machines).
* parallel: optional, False by default. If set to True, meshing runs in parallelized mode.
"""
self._background = 'white'
self._background_opacity = 1
self._size = size
self._compute_normals_mode = compute_normals_mode
self._parallel = parallel
self.html = HTML("Selected shape : None")
self._bb = None # the bounding box, necessary to compute camera position
# the default camera object
self._camera_target = [0., 0., 0.] # the point to look at
self._camera_position = [0, 0., 100.] # the camera initial position
self._camera = None
# a dictionnary of all the shapes belonging to the renderer
# each element is a key 'mesh_id:shape'
self._shapes = {}
# we save the renderer so that is can be accessed
self._renderer = None
# the group of 3d and 2d objects to render
self._displayed_pickable_objects = Group()
# the group of other objects (grid, trihedron etc.) that can't be selected
self._displayed_non_pickable_objects = Group()
# event manager/selection manager
self._picker = Picker(controlling=self._displayed_pickable_objects, event='mousedown')
self._current_shape_selection = None
self._current_mesh_selection = None
self._selection_color = format_color(232, 176, 36)
self._select_callbacks = [] # a list of all functions called after an object is selected
def click(value):
""" called whenever a shape or edge is clicked
"""
obj = value.owner.object
if self._current_mesh_selection is not None:
self._current_mesh_selection.material.color = self._current_selection_material_color
if obj is not None:
id_clicked = obj.name # the mesh id clicked
self._current_mesh_selection = obj
self._current_selection_material_color = obj.material.color
obj.material.color = self._selection_color
# get the shape from this mesh id
selected_shape = self._shapes[id_clicked]
html_value = "<b>Shape type:</b> %s<br>" % get_type_as_string(selected_shape)
html_value += "<b>Shape id:</b> %s<br>" % selected_shape
self.html.value = html_value
self._current_shape_selection = selected_shape
else:
self.html.value = "<b>Shape type:</b> None<br><b>Shape id:</b> None"
# then execute calbacks
for callback in self._select_callbacks:
callback(self._current_shape_selection)
self._picker.observe(click)
def register_select_callback(self, callback):
""" Adds a callback that will be called each time a shape is selected
"""
if not callable(callback):
raise AssertionError("You must provide a callable to register the callback")
else:
self._select_callbacks.append(callback)
def unregister_callback(self, callback):
""" Remove a callback from the callback list
"""
if not callback in self._select_callbacks:
raise AssertionError("This callback is not registered")
else:
self._select_callbacks.remove(callback)
def GetSelectedShape(self):
""" Returns the selected shape
"""
return self._current_shape_selection
def DisplayMesh(self,
mesh,
color=default_mesh_color):
""" Display a MEFISTO2 triangle mesh
"""
if not HAVE_SMESH:
print("SMESH not installed, DisplayMesh method unavailable.")
return
if not isinstance(mesh, SMESH_Mesh):
raise AssertionError("You mush provide an SMESH_Mesh instance")
mesh_ds = mesh.GetMeshDS() # the mesh data source
face_iter = mesh_ds.facesIterator()
# vertices positions are stored to a liste
vertices_position = []
for _ in range(mesh_ds.NbFaces()-1):
face = face_iter.next()
#print('Face %i, type %i' % (i, face.GetType()))
#print(dir(face))
# if face.GetType == 3 : triangle mesh, then 3 nodes
for j in range(3):
node = face.GetNode(j)
#print('Coordinates of node %i:(%f,%f,%f)'%(i, node.X(), node.Y(), node.Z()))
vertices_position.append(node.X())
vertices_position.append(node.Y())
vertices_position.append(node.Z())
number_of_vertices = len(vertices_position)
# then we build the vertex and faces collections as numpy ndarrays
np_vertices = np.array(vertices_position, dtype='float32').reshape(int(number_of_vertices / 3), 3)
# Note: np_faces is just [0, 1, 2, 3, 4, 5, ...], thus arange is used
np_faces = np.arange(np_vertices.shape[0], dtype='uint32')
# set geometry properties
buffer_geometry_properties = {'position': BufferAttribute(np_vertices),
'index' : BufferAttribute(np_faces)}
# build a BufferGeometry instance
mesh_geometry = BufferGeometry(attributes=buffer_geometry_properties)
mesh_geometry.exec_three_obj_method('computeVertexNormals')
# then a default material
mesh_material = MeshPhongMaterial(color=color,
polygonOffset=True,
polygonOffsetFactor=1,
polygonOffsetUnits=1,
shininess=0.5,
wireframe=False,
side='DoubleSide')
edges_material = MeshPhongMaterial(color='black',
polygonOffset=True,
polygonOffsetFactor=1,
polygonOffsetUnits=1,
shininess=0.5,
wireframe=True)
# create a mesh unique id
mesh_id = uuid.uuid4().hex
# finally create the mash
shape_mesh = Mesh(geometry=mesh_geometry,
material=mesh_material,
name=mesh_id)
edges_mesh = Mesh(geometry=mesh_geometry,
material=edges_material,
name=mesh_id)
# a special display for the mesh
camera_target = [0., 0., 0.] # the point to look at
camera_position = [0, 0., 100.] # the camera initial position
camera = PerspectiveCamera(position=camera_position,
lookAt=camera_target,
up=[0, 0, 1],
fov=50,
children=[DirectionalLight(color='#ffffff',
position=[50, 50, 50],
intensity=0.9)])
scene_shp = Scene(children=[shape_mesh, edges_mesh, camera, AmbientLight(color='#101010')])
renderer = Renderer(camera=camera,
background=self._background,
background_opacity=self._background_opacity,
scene=scene_shp,
controls=[OrbitControls(controlling=camera, target=camera_target)],
width=self._size[0],
height=self._size[1],
antialias=True)
display(renderer)
def DisplayShape(self,
shp, # the TopoDS_Shape to be displayed
shape_color=default_shape_color, # the default
render_edges=False,
edge_color=default_edge_color,
compute_uv_coords=False,
quality=1.0,
transparency=False,
opacity=1.,
topo_level='default',
update=False):
""" Displays a topods_shape in the renderer instance.
shp: the TopoDS_Shape to render
shape_color: the shape color, in html corm, eg '#abe000'
render_edges: optional, False by default. If True, compute and dislay all
edges as a linear interpolation of segments.
edge_color: optional, black by default. The color used for edge rendering,
in html form eg '#ff00ee'
compute_uv_coords: optional, false by default. If True, compute texture
coordinates (required if the shape has to be textured)
quality: optional, 1.0 by default. If set to something lower than 1.0,
mesh will be more precise. If set to something higher than 1.0,
mesh will be less precise, i.e. lower numer of triangles.
transparency: optional, False by default (opaque).
opacity: optional, float, by default to 1 (opaque). if transparency is set to True,
0. is fully opaque, 1. is fully transparent.
topo_level: "default" by default. The value should be either "compound", "shape", "vertex".
update: optional, False by default. If True, render all the shapes.
"""
if is_wire(shp) or is_edge(shp):
self.AddCurveToScene(shp, shape_color)
if topo_level != "default":
t = TopologyExplorer(shp)
map_type_and_methods = {"Solid": t.solids, "Face": t.faces, "Shell": t.shells,
"Compound": t.compounds, "Compsolid": t.comp_solids}
for subshape in map_type_and_methods[topo_level]():
self.AddShapeToScene(subshape, shape_color, render_edges, edge_color, compute_uv_coords, quality,
transparency, opacity)
else:
self.AddShapeToScene(shp, shape_color, render_edges, edge_color, compute_uv_coords, quality,
transparency, opacity)
if update:
self.Display()
def AddCurveToScene(self, shp, color):
""" shp is either a TopoDS_Wire or a TopodS_Edge.
"""
if is_edge(shp):
pnts = discretize_edge(shp)
elif is_wire(shp):
pnts = discretize_wire(shp)
np_edge_vertices = np.array(pnts, dtype=np.float32)
np_edge_indices = np.arange(np_edge_vertices.shape[0], dtype=np.uint32)
edge_geometry = BufferGeometry(attributes={
'position': BufferAttribute(np_edge_vertices),
'index' : BufferAttribute(np_edge_indices)
})
edge_material = LineBasicMaterial(color=color, linewidth=2, fog=True)
edge_lines = LineSegments(geometry=edge_geometry, material=edge_material)
# Add geometries to pickable or non pickable objects
self._displayed_pickable_objects.add(edge_lines)
def AddShapeToScene(self,
shp, # the TopoDS_Shape to be displayed
shape_color=default_shape_color, # the default
render_edges=False,
edge_color=default_edge_color,
compute_uv_coords=False,
quality=1.0,
transparency=False,
opacity=1.):
# first, compute the tesselation
tess = Tesselator(shp)
tess.Compute(uv_coords=compute_uv_coords,
compute_edges=render_edges,
mesh_quality=quality,
parallel=self._parallel)
# get vertices and normals
vertices_position = tess.GetVerticesPositionAsTuple()
number_of_triangles = tess.ObjGetTriangleCount()
number_of_vertices = len(vertices_position)
# number of vertices should be a multiple of 3
if number_of_vertices % 3 != 0:
raise AssertionError("Wrong number of vertices")
if number_of_triangles * 9 != number_of_vertices:
raise AssertionError("Wrong number of triangles")
# then we build the vertex and faces collections as numpy ndarrays
np_vertices = np.array(vertices_position, dtype='float32').reshape(int(number_of_vertices / 3), 3)
# Note: np_faces is just [0, 1, 2, 3, 4, 5, ...], thus arange is used
np_faces = np.arange(np_vertices.shape[0], dtype='uint32')
# set geometry properties
buffer_geometry_properties = {'position': BufferAttribute(np_vertices),
'index' : BufferAttribute(np_faces)}
if self._compute_normals_mode == NORMAL.SERVER_SIDE:
# get the normal list, converts to a numpy ndarray. This should not raise
# any issue, since normals have been computed by the server, and are available
# as a list of floats
np_normals = np.array(tess.GetNormalsAsTuple(), dtype='float32').reshape(-1, 3)
# quick check
if np_normals.shape != np_vertices.shape:
raise AssertionError("Wrong number of normals/shapes")
buffer_geometry_properties['normal'] = BufferAttribute(np_normals)
# build a BufferGeometry instance
shape_geometry = BufferGeometry(attributes=buffer_geometry_properties)
# if the client has to render normals, add the related js instructions
if self._compute_normals_mode == NORMAL.CLIENT_SIDE:
shape_geometry.exec_three_obj_method('computeVertexNormals')
# then a default material
shp_material = self._material(shape_color, transparent=transparency, opacity=opacity)
# create a mesh unique id
mesh_id = uuid.uuid4().hex
# finally create the mash
shape_mesh = Mesh(geometry=shape_geometry,
material=shp_material,
name=mesh_id)
# and to the dict of shapes, to have a mapping between meshes and shapes
self._shapes[mesh_id] = shp
# edge rendering, if set to True
edge_lines = None
if render_edges:
edges = list(map(lambda i_edge: [tess.GetEdgeVertex(i_edge, i_vert) for i_vert in range(tess.ObjEdgeGetVertexCount(i_edge))], range(tess.ObjGetEdgeCount())))
edges = list(filter(lambda edge: len(edge) == 2, edges))
np_edge_vertices = np.array(edges, dtype=np.float32).reshape(-1, 3)
np_edge_indices = np.arange(np_edge_vertices.shape[0], dtype=np.uint32)
edge_geometry = BufferGeometry(attributes={
'position': BufferAttribute(np_edge_vertices),
'index' : BufferAttribute(np_edge_indices)
})
edge_material = LineBasicMaterial(color=edge_color, linewidth=1)
edge_lines = LineSegments(geometry=edge_geometry, material=edge_material)
# Add geometries to pickable or non pickable objects
self._displayed_pickable_objects.add(shape_mesh)
if render_edges:
self._displayed_non_pickable_objects.add(edge_lines)
def _scale(self, vec):
r = self._bb.diagonal * 2.5
n = np.linalg.norm(vec)
new_vec = [v / n * r for v in vec]
return self._add(new_vec, self._bb.center)
def _add(self, vec1, vec2):
return list(v1 + v2 for v1, v2 in zip(vec1, vec2))
def _material(self, color, transparent=False, opacity=1.0):
material = CustomMaterial("standard")
material.color = color
material.clipping = True
material.side = "DoubleSide"
material.alpha = 0.7
material.polygonOffset = False
material.polygonOffsetFactor = 1
material.polygonOffsetUnits = 1
material.transparent = transparent
material.opacity = opacity
material.update("metalness", 0.3)
material.update("roughness", 0.8)
return material
def EraseAll(self):
self._shapes = {}
self._displayed_pickable_objects = Group()
self._current_shape_selection = None
self._current_mesh_selection = None
self._current_selection_material = None
self._renderer.scene = Scene(children=[])
def Display(self):
# Get the overall bounding box
if self._shapes:
self._bb = BoundingBox([self._shapes.values()])
else: # if nothing registered yet, create a fake bb
self._bb = BoundingBox([[BRepPrimAPI_MakeSphere(5.).Shape()]])
bb_max = self._bb.max
bb_diag = 2 * self._bb.diagonal
# Set up camera
camera_target = self._bb.center
camera_position = self._scale([1, 1, 1])
self._camera = CombinedCamera(position=camera_position,
width=self._size[0], height=self._size[1],
far=10 * bb_diag, orthoFar=10 * bb_diag)
self._camera.up = (0.0, 0.0, 1.0)
self._camera.lookAt(camera_target)
self._camera.mode = 'orthographic'
self._camera_target = camera_target
self._camera.position = camera_position
# Set up lights in every of the 8 corners of the global bounding box
key_lights = [
DirectionalLight(color='white', position=position, intensity=0.12)
for position in list(itertools.product((-bb_diag, bb_diag), (-bb_diag, bb_diag), (-bb_diag, bb_diag)))
]
ambient_light = AmbientLight(intensity=1.0)
# Set up Helpers
self.axes = Axes(bb_center=self._bb.center, length=bb_max * 1.1)
self.grid = Grid(bb_center=self._bb.center, maximum=bb_max, colorCenterLine='#aaa', colorGrid='#ddd')
# Set up scene
environment = self.axes.axes + key_lights + [ambient_light, self.grid.grid, self._camera]
scene_shp = Scene(children=[self._displayed_pickable_objects,
self._displayed_non_pickable_objects] + environment)
# Set up Controllers
self._controller = OrbitControls(controlling=self._camera, target=camera_target)
self._renderer = Renderer(camera=self._camera,
background=self._background,
background_opacity=self._background_opacity,
scene=scene_shp,
controls=[self._controller, self._picker],
width=self._size[0],
height=self._size[1],
antialias=True)
# needs to be done after setup of camera
self.grid.set_rotation((math.pi / 2.0, 0, 0, "XYZ"))
self.grid.set_position((0, 0, 0))
# Workaround: Zoom forth and back to update frame. Sometimes necessary :(
self._camera.zoom = 1.01
self._update()
self._camera.zoom = 1.0
self._update()
# then display both 3d widgets and webui
display(HBox([self._renderer, self.html]))
def _update(self):
self._controller.exec_three_obj_method('update')
def __repr__(self):
self.Display()
return ""
