forked from bartvdbraak/blender
1e02a5ff43
creating empties. The documentation says None is a valid argument for obdata (making empties), but this would cause an exception. Now obdata is only used when it is defined. An optional name argument can be passed to override obdata.name as well.
326 lines
10 KiB
Python
326 lines
10 KiB
Python
# ##### BEGIN GPL LICENSE BLOCK #####
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ##### END GPL LICENSE BLOCK #####
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# <pep8-80 compliant>
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__all__ = (
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"add_object_align_init",
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"object_data_add",
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"AddObjectHelper",
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"object_add_grid_scale",
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"object_add_grid_scale_apply_operator",
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"object_image_guess",
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"world_to_camera_view",
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)
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import bpy
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from bpy.props import BoolProperty, FloatVectorProperty
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def add_object_align_init(context, operator):
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"""
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Return a matrix using the operator settings and view context.
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:arg context: The context to use.
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:type context: :class:`bpy.types.Context`
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:arg operator: The operator, checked for location and rotation properties.
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:type operator: :class:`bpy.types.Operator`
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:return: the matrix from the context and settings.
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:rtype: :class:`mathutils.Matrix`
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"""
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from mathutils import Matrix, Vector, Euler
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properties = operator.properties if operator is not None else None
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space_data = context.space_data
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if space_data and space_data.type != 'VIEW_3D':
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space_data = None
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# location
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if operator and properties.is_property_set("location"):
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location = Matrix.Translation(Vector(properties.location))
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else:
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if space_data: # local view cursor is detected below
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location = Matrix.Translation(space_data.cursor_location)
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else:
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location = Matrix.Translation(context.scene.cursor_location)
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if operator:
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properties.location = location.to_translation()
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# rotation
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view_align = (context.user_preferences.edit.object_align == 'VIEW')
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view_align_force = False
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if operator:
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if properties.is_property_set("view_align"):
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view_align = view_align_force = operator.view_align
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else:
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if properties.is_property_set("rotation"):
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# ugh, 'view_align' callback resets
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value = properties.rotation[:]
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properties.view_align = view_align
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properties.rotation = value
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del value
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else:
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properties.view_align = view_align
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if operator and (properties.is_property_set("rotation") and
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not view_align_force):
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rotation = Euler(properties.rotation).to_matrix().to_4x4()
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else:
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if view_align and space_data:
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rotation = space_data.region_3d.view_matrix.to_3x3().inverted()
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rotation.resize_4x4()
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else:
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rotation = Matrix()
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# set the operator properties
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if operator:
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properties.rotation = rotation.to_euler()
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return location * rotation
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def object_data_add(context, obdata, operator=None, use_active_layer=True, name=None):
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"""
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Add an object using the view context and preference to to initialize the
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location, rotation and layer.
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:arg context: The context to use.
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:type context: :class:`bpy.types.Context`
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:arg obdata: the data used for the new object.
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:type obdata: valid object data type or None.
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:arg operator: The operator, checked for location and rotation properties.
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:type operator: :class:`bpy.types.Operator`
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:arg name: Optional name
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:type name: string
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:return: the newly created object in the scene.
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:rtype: :class:`bpy.types.ObjectBase`
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"""
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scene = context.scene
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# ugh, could be made nicer
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for ob in scene.objects:
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ob.select = False
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if name is None:
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name = "Object" if obdata is None else obdata.name
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obj_new = bpy.data.objects.new(name, obdata)
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base = scene.objects.link(obj_new)
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base.select = True
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v3d = None
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if context.space_data and context.space_data.type == 'VIEW_3D':
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v3d = context.space_data
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if use_active_layer:
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if v3d and v3d.local_view:
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base.layers_from_view(context.space_data)
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base.layers[scene.active_layer] = True
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else:
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base.layers = [True if i == scene.active_layer
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else False for i in range(len(scene.layers))]
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else:
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if v3d:
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base.layers_from_view(context.space_data)
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obj_new.matrix_world = add_object_align_init(context, operator)
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obj_act = scene.objects.active
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# XXX
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# caused because entering edit-mode does not add a empty undo slot!
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if context.user_preferences.edit.use_enter_edit_mode:
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if not (obj_act and
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obj_act.mode == 'EDIT' and
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obj_act.type == obj_new.type):
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_obdata = bpy.data.meshes.new(name)
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obj_act = bpy.data.objects.new(_obdata.name, _obdata)
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obj_act.matrix_world = obj_new.matrix_world
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scene.objects.link(obj_act)
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scene.objects.active = obj_act
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bpy.ops.object.mode_set(mode='EDIT')
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# need empty undo step
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bpy.ops.ed.undo_push(message="Enter Editmode")
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# XXX
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if obj_act and obj_act.mode == 'EDIT' and obj_act.type == obj_new.type:
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bpy.ops.mesh.select_all(action='DESELECT')
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bpy.ops.object.mode_set(mode='OBJECT')
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obj_act.select = True
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scene.update() # apply location
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#scene.objects.active = obj_new
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bpy.ops.object.join() # join into the active.
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if obdata:
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bpy.data.meshes.remove(obdata)
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# base is freed, set to active object
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base = scene.object_bases.active
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bpy.ops.object.mode_set(mode='EDIT')
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else:
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scene.objects.active = obj_new
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if context.user_preferences.edit.use_enter_edit_mode:
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bpy.ops.object.mode_set(mode='EDIT')
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return base
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class AddObjectHelper:
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def view_align_update_callback(self, context):
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if not self.view_align:
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self.rotation.zero()
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view_align = BoolProperty(
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name="Align to View",
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default=False,
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update=view_align_update_callback,
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)
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location = FloatVectorProperty(
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name="Location",
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subtype='TRANSLATION',
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)
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rotation = FloatVectorProperty(
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name="Rotation",
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subtype='EULER',
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)
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@classmethod
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def poll(self, context):
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return context.scene.library is None
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def object_add_grid_scale(context):
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"""
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Return scale which should be applied on object
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data to align it to grid scale
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"""
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space_data = context.space_data
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if space_data and space_data.type == 'VIEW_3D':
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return space_data.grid_scale_unit
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return 1.0
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def object_add_grid_scale_apply_operator(operator, context):
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"""
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Scale an operators distance values by the grid size.
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"""
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grid_scale = object_add_grid_scale(context)
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properties = operator.properties
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properties_def = properties.bl_rna.properties
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for prop_id in properties_def.keys():
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if not properties.is_property_set(prop_id):
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prop_def = properties_def[prop_id]
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if prop_def.unit == 'LENGTH' and prop_def.subtype == 'DISTANCE':
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setattr(operator, prop_id,
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getattr(operator, prop_id) * grid_scale)
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def object_image_guess(obj, bm=None):
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"""
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Return a single image used by the object,
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first checking the texture-faces, then the material.
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"""
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# TODO, cycles/nodes materials
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me = obj.data
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if bm is None:
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if obj.mode == 'EDIT':
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import bmesh
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bm = bmesh.from_edit_mesh(me)
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if bm is not None:
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tex_layer = bm.faces.layers.tex.active
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if tex_layer is not None:
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for f in bm.faces:
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image = f[tex_layer].image
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if image is not None:
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return image
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else:
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tex_layer = me.uv_textures.active
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if tex_layer is not None:
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for tf in tex_layer.data:
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image = tf.image
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if image is not None:
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return image
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for m in obj.data.materials:
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if m is not None:
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# backwards so topmost are highest priority
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for mtex in reversed(m.texture_slots):
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if mtex and mtex.use_map_color_diffuse:
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texture = mtex.texture
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if texture and texture.type == 'IMAGE':
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image = texture.image
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if image is not None:
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return image
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return None
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def world_to_camera_view(scene, obj, coord):
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"""
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Returns the camera space coords for a 3d point.
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(also known as: normalized device coordinates - NDC).
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Where (0, 0) is the bottom left and (1, 1) is the top right of the camera frame.
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values outside 0-1 are also supported.
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A negative 'z' value means the point is behind the camera.
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Takes shift-x/y, lens angle and sensor size into account
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as well as perspective/ortho projections.
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:arg scene: Scene to use for frame size.
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:type scene: :class:`bpy.types.Scene`
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:arg obj: Camera object.
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:type obj: :class:`bpy.types.Object`
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:arg coord: World space location.
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:type coord: :class:`mathutils.Vector`
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:return: a vector where X and Y map to the view plane and Z is the depth on the view axis.
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:rtype: :class:`mathutils.Vector`
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"""
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from mathutils import Vector
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co_local = obj.matrix_world.normalized().inverted() * coord
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z = -co_local.z
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camera = obj.data
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frame = [-v for v in camera.view_frame(scene=scene)[:3]]
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if camera.type != 'ORTHO':
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if z == 0.0:
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return Vector((0.5, 0.5, 0.0))
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else:
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frame = [(v / (v.z / z)) for v in frame]
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min_x, max_x = frame[1].x, frame[2].x
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min_y, max_y = frame[0].y, frame[1].y
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x = (co_local.x - min_x) / (max_x - min_x)
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y = (co_local.y - min_y) / (max_y - min_y)
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return Vector((x, y, z))
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