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__init__.py
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__init__.py
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# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTIBILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import bpy
from bpy.props import *
from bpy.types import PropertyGroup, Panel, Operator
bl_info = {
"name": "GP SurfDef Baker",
"author": "Cody Winchester",
"description": "",
"blender": (2, 80, 0),
"version": (0, 0, 1),
"location": "",
"warning": "",
"category": "Generic"
}
class GPBScnProperties(PropertyGroup):
target_object: PointerProperty(
type=bpy.types.Object)
# copy_and_separate_bool: BoolProperty(default=False, description="")
# copy_scale: FloatProperty(default=1.00, min=0.00,
# max=100.00, description="Scale of deformation")
# mirror_axis: IntProperty(default=0, min=0, max=2,
# description="Axis to mirror shape keys")
def main(context):
data = bpy.data
scn = context.scene
scn_props = context.scene.gpb_props
tar = scn_props.target_object
gp = context.active_object
# Cache active frame strokes world space data
v_cos = []
e_inds = []
ind_offset = 0
ref_frame = gp.data.layers.active.active_frame
for stro in ref_frame.strokes:
strokes = []
for p, po in enumerate(stro.points):
strokes.append(gp.matrix_world @ po.co)
v_cos.append(gp.matrix_world @ po.co)
if p > 0:
e_inds.append([p-1+ind_offset, p+ind_offset])
ind_offset += len(stro.points)
# Create temp mesh from gp
mesh_name = 'GP Temp Bake Mesh'
mesh_dat = data.meshes.new(mesh_name)
mesh_dat.from_pydata(v_cos, e_inds, [])
mesh_dat.update()
bake_ob = data.objects.new(mesh_name, mesh_dat)
mod = bake_ob.modifiers.new('Surface Deform', 'SURFACE_DEFORM')
mod.target = tar
# Bind mesh object to target object
context.collection.objects.link(bake_ob)
bake_ob.select_set(True)
context.view_layer.objects.active = bake_ob
bpy.ops.object.surfacedeform_bind(modifier=mod.name)
scn.frame_set(scn.frame_start)
cur_frames = [f.frame_number for f in gp.data.layers.active.frames]
for i in range(scn.frame_end-scn.frame_start+1):
deps_g = context.evaluated_depsgraph_get()
bake_eval = bake_ob.evaluated_get(deps_g)
mesh = bake_eval.to_mesh()
if scn.frame_current not in cur_frames:
frame = gp.data.layers.active.frames.new(scn.frame_current)
for ref_stroke in ref_frame.strokes:
stroke = frame.strokes.new()
stroke.line_width = ref_stroke.line_width
stroke.display_mode = ref_stroke.display_mode
for ref_po in ref_stroke.points:
stroke.points.add(
1, pressure=ref_po.pressure, strength=ref_po.strength)
stroke.points[-1].co = ref_po.co
else:
frame = [
f for f in gp.data.layers.active.frames if f.frame_number == scn.frame_current][0]
ind = 0
for stro in frame.strokes:
for po in stro.points:
po.co = bake_ob.matrix_world @ mesh.vertices[ind].co
ind += 1
scn.frame_set(scn.frame_current+1)
data.meshes.remove(mesh_dat)
# data.objects.remove(bake_ob)
# Reset active selection
gp.select_set(True)
context.view_layer.objects.active = gp
return
class BakeGPSurfaceDeform(Operator):
"""Bind and bake the surface deform of the active Grease Pencil object"""
bl_idname = "object.bake_gp_surfdef"
bl_label = "Bake GP Surface Deform"
@classmethod
def poll(cls, context):
return context.active_object is not None and context.active_object.type == 'GPENCIL'
@classmethod
def poll(cls, context):
return context.scene.gpb_props.target_object is not None
def execute(self, context):
main(context)
return {'FINISHED'}
class GPB_PT_tools_panel(Panel):
"""Creates a Panel in the scene context of the properties editor"""
bl_label = "Tools"
bl_space_type = 'VIEW_3D'
bl_region_type = 'UI'
bl_category = 'GP SurfDef Bake'
@classmethod
def poll(cls, context):
obj = context.active_object
if obj is not None and obj.type == 'GPENCIL':
return True
def draw(self, context):
layout = self.layout
scn = context.scene
data = bpy.data
aobj = context.active_object
scn_prop = scn.gpb_props
box = layout.box()
row = box.row()
row.alignment = 'CENTER'
row.label(text="Target Mesh")
row = box.row(align=True)
row.alignment = 'CENTER'
row.prop(scn_prop, 'target_object', text='Surface Binding Object')
row.alignment = 'CENTER'
row = box.row(align=True)
row.alignment = 'CENTER'
row.operator("object.bake_gp_surfdef",
text='Bake Surface Deform')
row.scale_y = 1.5
row.alignment = 'CENTER'
def register():
bpy.utils.register_class(BakeGPSurfaceDeform)
bpy.utils.register_class(GPBScnProperties)
bpy.utils.register_class(GPB_PT_tools_panel)
bpy.types.Scene.gpb_props = PointerProperty(type=GPBScnProperties)
return
def unregister():
bpy.utils.unregister_class(BakeGPSurfaceDeform)
bpy.utils.unregister_class(GPBScnProperties)
bpy.utils.unregister_class(GPB_PT_tools_panel)
del bpy.types.Scene.gpb_props
return
if __name__ == "__main__":
register()