def add_text(self, text, shading={}, **kwargs):
shading.update(kwargs)
sh = self.__get_shading(shading)
tt = p3s.TextTexture(string=text, color=sh["text_color"])
sm = p3s.SpriteMaterial(map=tt)
self.text = p3s.Sprite(material=sm, scaleToTexture=True)
self.scene.add(self.text)
def _create_text_sprite(position, bounding_box, display_text):
# Position offset in y
text_position = tuple(position.value +
np.array([0, 0.8 * bounding_box[1], 0]))
text = p3.TextTexture(string=display_text, color='black', size=300)
text_material = p3.SpriteMaterial(map=text, transparent=True)
size = 1.0
return p3.Sprite(material=text_material,
position=text_position,
scale=[size, size, size])
def _make_axis_tick(self, string, position, color="black", size=1.0):
"""
Make a text-based sprite for axis tick
"""
sm = p3.SpriteMaterial(map=p3.TextTexture(string=string,
color=color,
size=300,
squareTexture=True),
transparent=True)
return p3.Sprite(material=sm,
position=position,
scaleToTexture=True,
scale=[size, size, size])
def add_labels(element_groups, key_elements, use_label_arrays):
"""Create label elements for the scene."""
import pythreejs as pjs
group_labels = pjs.Group()
unique_label_sets = {}
for el in element_groups["atoms"]:
if "label" in el and el.label is not None:
unique_label_sets.setdefault(
(("label", el.label),
("color", el.get("font_color", "black"))), []).append(el)
if unique_label_sets:
key_elements["group_labels"] = group_labels
for el_hash, els in unique_label_sets.items():
el = els[0]
data = dict(el_hash)
# depthWrite=depthTest=False is required, for the sprite to remain on top,
# and not have the whitespace obscure objects behind, see:
# https://stackoverflow.com/questions/11165345/three-js-webgl-transparent-planes-hiding-other-planes-behind-them
# TODO can this be improved?
text_material = pjs.SpriteMaterial(
map=pjs.TextTexture(
string=el.label,
color=el.get("font_color", "black"),
size=2000, # this texttexture size seems to work, not sure why?
),
opacity=1.0,
transparent=True,
depthWrite=False,
depthTest=False,
)
data["material"] = text_material
key_elements.setdefault("label_arrays", []).append(data)
if use_label_arrays:
text_sprite = pjs.Sprite(material=text_material)
label_array = pjs.CloneArray(
original=text_sprite,
positions=[e.position.tolist() for e in els],
merge=False,
)
else:
label_array = [
pjs.Sprite(material=text_material,
position=e.position.tolist()) for e in els
]
group_labels.add(label_array)
return group_labels
def add_text(self, text, shading={}):
self.update_shading(shading)
tt = p3s.TextTexture(string=text, color=self.s["text_color"])
sm = p3s.SpriteMaterial(map=tt)
self.text = p3s.Sprite(material=sm, scaleToTexture=True)
self.scene.add(self.text)
def create_jslabelmesh_view(gobject, mapping=None, jslink=False):
"""create PyThreeJS Text Mesh for GeometricObject
and with one-way synchronisation
Properties
----------
gobject : GeometricObject
mapping : None or dict
if None, use default gobject->jsobject mapping
jslink : bool
if True, where possible, create client side links
http://ipywidgets.readthedocs.io/en/latest/examples/Widget%20Events.html#The-difference-between-linking-in-the-kernel-and-linking-in-the-client
Examples
--------
>>> import pandas3js as pjs
>>> sphere = pjs.models.Sphere()
>>> lmesh = pjs.views.create_jslabelmesh_view(sphere)
>>> lmesh.position
[0.0, 0.0, 0.0]
>>> str(lmesh.material.map.string)
'-'
>>> lmesh.scale
[1.0, 1.0, 1.0]
>>> sphere.position = (1,0,0)
>>> lmesh.position
[1.0, 0.0, 0.0]
>>> sphere.label = 'test'
>>> str(lmesh.material.map.string)
'test'
>>> sphere.radius = 3.0
>>> lmesh.scale
[1.0, 3.0, 1.0]
"""
if jslink:
direct_link = widget.jsdlink
else:
direct_link = trait.dlink
class_str = obj_to_str(gobject)
if hasattr(gobject, '_use_default_viewmap'):
class_map = copy.deepcopy(gobject_jsmapping['default'])
class_map['grep'] = 'pythreejs.' + class_str.split('.')[-1]
# directly link all traits to geometry object
for trait_name in gobject.class_own_traits():
class_map['gdmap'][trait_name] = trait_name
if gobject._use_default_viewmap is not None:
class_map['show_label'] = True
class_map['label_height'] = gobject._use_default_viewmap
elif not class_str in gobject_jsmapping:
raise ValueError(
'No pythreejs mapping available for {}'.format(class_str))
else:
class_map = gobject_jsmapping[class_str]
text_map = js.TextTexture(string=gobject.label,
color=colors.to_hex(gobject.label_color),
size=100,
squareTexture=False)
material = js.SpriteMaterial(map=text_map,
opacity=gobject.label_transparency,
transparent=False,
depthTest=False,
depthWrite=True)
height = class_map['label_height']
height_attr = getattr(gobject, height) if isinstance(
height, basestring) else height
mesh = js.Sprite(material=material,
position=gobject.position,
scaleToTexture=True,
scale=[1, height_attr, 1])
# add special traits
mesh.add_traits(gobject_id=HashableType())
mesh.gobject_id = gobject.id
mesh.add_traits(other_info=trait.CUnicode().tag(sync=True))
if not class_map['show_label']:
mesh.visible = False
return mesh
# add directional synchronisation
direct_link((gobject, 'other_info'), (mesh, 'other_info'))
direct_link((gobject, 'label'), (text_map, 'string'))
direct_link((gobject, 'position'), (mesh, 'position'))
direct_link((gobject, 'label_visible'), (mesh, 'visible'))
direct_link((gobject, 'label_transparency'), (material, 'opacity'))
trait.dlink((gobject, 'label_color'), (text_map, 'color'), colors.to_hex)
trait.dlink((gobject, 'label_transparency'), (material, 'transparent'),
lambda t: True if t <= 0.999 else False)
if isinstance(height, basestring):
def change_height(change):
mesh.scale = [1, change.new, 1]
gobject.observe(change_height, names=height)
return mesh
