121 lines
3.7 KiB
Python
121 lines
3.7 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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from bpy.types import (
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Operator,
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)
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from bpy.props import (
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IntProperty,
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)
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class CONSTRAINT_OT_add_target(Operator):
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"""Add a target to the constraint"""
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bl_idname = "constraint.add_target"
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bl_label = "Add Target"
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bl_options = {'UNDO', 'INTERNAL'}
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def execute(self, context):
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context.constraint.targets.new()
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return {'FINISHED'}
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class CONSTRAINT_OT_remove_target(Operator):
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"""Remove the target from the constraint"""
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bl_idname = "constraint.remove_target"
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bl_label = "Remove Target"
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bl_options = {'UNDO', 'INTERNAL'}
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index: IntProperty()
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def execute(self, context):
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tgts = context.constraint.targets
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tgts.remove(tgts[self.index])
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return {'FINISHED'}
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class CONSTRAINT_OT_normalize_target_weights(Operator):
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"""Normalize weights of all target bones"""
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bl_idname = "constraint.normalize_target_weights"
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bl_label = "Normalize Weights"
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bl_options = {'UNDO', 'INTERNAL'}
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def execute(self, context):
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tgts = context.constraint.targets
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total = sum(t.weight for t in tgts)
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if total > 0:
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for t in tgts:
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t.weight = t.weight / total
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return {'FINISHED'}
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class CONSTRAINT_OT_disable_keep_transform(Operator):
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"""Set the influence of this constraint to zero while """ \
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"""trying to maintain the object's transformation. Other active """ \
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"""constraints can still influence the final transformation"""
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bl_idname = "constraint.disable_keep_transform"
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bl_label = "Disable and Keep Transform"
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bl_options = {'UNDO', 'INTERNAL'}
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@classmethod
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def poll(cls, context):
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constraint = getattr(context, "constraint", None)
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return constraint and constraint.influence > 0.0
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def execute(self, context):
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"""Disable constraint while maintaining the visual transform."""
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# This works most of the time, but when there are multiple constraints active
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# there could still be one that overrides the visual transform.
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#
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# Note that executing this operator and then increasing the constraint
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# influence may move the object; this happens when the constraint is
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# additive rather than replacing the transform entirely.
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# Get the matrix in world space.
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is_bone_constraint = context.space_data.context == 'BONE_CONSTRAINT'
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ob = context.object
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if is_bone_constraint:
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bone = context.pose_bone
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mat = ob.matrix_world @ bone.matrix
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else:
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mat = ob.matrix_world
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context.constraint.influence = 0.0
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# Set the matrix.
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if is_bone_constraint:
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bone.matrix = ob.matrix_world.inverted() @ mat
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else:
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ob.matrix_world = mat
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return {'FINISHED'}
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classes = (
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CONSTRAINT_OT_add_target,
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CONSTRAINT_OT_remove_target,
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CONSTRAINT_OT_normalize_target_weights,
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CONSTRAINT_OT_disable_keep_transform,
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)
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