import bpy
import numpy as np
from time import perf_counter, time
from mathutils import Vector, Matrix
from gp_interpolate.utils import (matrix_transform,
plane_on_bone,
ray_cast_point,
intersect_with_tesselated_plane,
triangle_normal,
search_square,
get_gp_draw_plane,
create_plane,
following_keys,
attr_set)
from mathutils.geometry import (barycentric_transform,
intersect_point_tri,
intersect_point_line,
intersect_line_plane,
tessellate_polygon)
## /!\ Old code kept for testing
## use pseudo plane coordinate instead of rayvast on real mesh plane
class GP_OT_interpolate_stroke_simple(bpy.types.Operator):
bl_idname = "gp.interpolate_stroke_simple"
bl_label = "Interpolate Stroke Simple"
bl_description = 'Interpolate Stroke Simple'
bl_options = {'REGISTER', 'UNDO'}
@classmethod
def poll(cls, context):
if context.active_object and context.object.type == 'GPENCIL'\
and context.mode in ('EDIT_GPENCIL', 'SCULPT_GPENCIL', 'PAINT_GPENCIL'):
return True
cls.poll_message_set("Need a Grease pencil object in Edit or Sculpt mode")
return False
@classmethod
def description(cls, context, properties):
if properties.next:
return f"Interpolate Stroke Forward"
else:
return f"Interpolate Stroke Backward"
next : bpy.props.BoolProperty(name='Next', default=True, options={'SKIP_SAVE'})
def execute(self, context):
settings = context.scene.gp_interpo_settings
auto_key_status = context.tool_settings.use_keyframe_insert_auto
context.tool_settings.use_keyframe_insert_auto = True
## Determine on what key to jump
frames_to_jump = following_keys(forward=self.next)
if not frames_to_jump:
self.report({'WARNING'}, 'No keyframe available in this direction')
return {'CANCELLED'}
frames_to_jump = frames_to_jump[0]
gp = context.object
scn = bpy.context.scene
dg = bpy.context.evaluated_depsgraph_get()
matrix = np.array(gp.matrix_world, dtype='float64')#.inverted()
col = settings.target_collection
if not col:
col = scn.collection
origin = np.array(scn.camera.matrix_world.to_translation(), 'float64')
# print('----')
tgt_strokes = [s for s in gp.data.layers.active.active_frame.strokes if s.select]
## If nothing selected in sculpt/paint, Select all before triggering
if not tgt_strokes and context.mode in ('SCULPT_GPENCIL', 'PAINT_GPENCIL'):
for s in gp.data.layers.active.active_frame.strokes:
s.select = True
tgt_strokes = gp.data.layers.active.active_frame.strokes
if not tgt_strokes:
self.report({'ERROR'}, 'No stroke selected !')
return {'CANCELLED'}
strokes_data = []
if settings.method == 'BONE':
## Follow Bone method (Full WIP)
if not settings.target_rig or not settings.target_bone:
self.report({'ERROR'}, 'No Bone selected')
return {'CANCELLED'}
bone_plane = plane_on_bone(settings.target_rig.pose.bones.get(settings.target_bone),
arm=settings.target_rig,
set_rotation=settings.use_bone_rotation)
strokes_data = []
for stroke in tgt_strokes:
nb_points = len(stroke.points)
local_co = np.empty(nb_points * 3, dtype='float64')
stroke.points.foreach_get('co', local_co)
# local_co_3d = local_co.reshape((nb_points, 3))
world_co_3d = matrix_transform(local_co.reshape((nb_points, 3)), matrix)
stroke_data = []
for i, point in enumerate(stroke.points):
point_co_world = world_co_3d[i]
hit_location, tri, tri_indices = intersect_with_tesselated_plane(point_co_world, origin, bone_plane)
## Probably easier to just generate a single vast triangle and use it
## Store same as other method (without object hit)
stroke_data.append((stroke, point_co_world, hit_location, tri, tri_indices))
strokes_data.append(stroke_data)
else:
## Geometry method
for stroke in tgt_strokes:
nb_points = len(stroke.points)
local_co = np.empty(nb_points * 3, dtype='float64')
stroke.points.foreach_get('co', local_co)
# local_co_3d = local_co.reshape((nb_points, 3))
world_co_3d = matrix_transform(local_co.reshape((nb_points, 3)), matrix)
stroke_data = []
for i, point in enumerate(stroke.points):
point_co_world = world_co_3d[i]
object_hit, hit_location, tri, tri_indices = ray_cast_point(point_co_world, origin, dg)
if not object_hit or object_hit not in col.all_objects[:]:
for square_co in search_square(point_co_world, factor=settings.search_range):
object_hit, hit_location, tri, tri_indices = ray_cast_point(square_co, origin, dg)
if object_hit and object_hit in col.all_objects[:]:
hit_location = intersect_line_plane(origin, point_co_world, tri[0], triangle_normal(*tri))
break
stroke_data.append((stroke, point_co_world, object_hit, hit_location, tri, tri_indices))
strokes_data.append(stroke_data)
# Copy stroke selection, jump frame and paste
bpy.ops.gpencil.copy()
scn.frame_set(frames_to_jump)
plan_co, plane_no = get_gp_draw_plane(gp)
bpy.ops.gpencil.paste()
if settings.method == 'BONE':
matrix_inv = np.array(gp.matrix_world.inverted(), dtype='float64')#.inverted()
new_strokes = gp.data.layers.active.active_frame.strokes[-len(strokes_data):]
bone_plane = plane_on_bone(settings.target_rig.pose.bones.get(settings.target_bone),
arm=settings.target_rig,
set_rotation=settings.use_bone_rotation)
for new_stroke, stroke_data in zip(new_strokes, strokes_data):
world_co_3d = [] # np.array(len()dtype='float64')#np.
for stroke, point_co, hit_location, tri_a, tri_indices in stroke_data:
tri_b = [bone_plane[i] for i in tri_indices]
# tri_b = matrix_transform(tri_b, settings.target_rig.matrix_world)
## rotate tri_b by bone differential angle camera's aim axis ?
new_loc = barycentric_transform(hit_location, *tri_a, *tri_b)
world_co_3d.append(new_loc)
# Reproject on plane
new_world_co_3d = [intersect_line_plane(origin, p, plan_co, plane_no) for p in world_co_3d]
new_local_co_3d = matrix_transform(new_world_co_3d, matrix_inv)
nb_points = len(new_stroke.points)
new_stroke.points.foreach_set('co', new_local_co_3d.reshape(nb_points*3))
new_stroke.points.update()
else:
dg = bpy.context.evaluated_depsgraph_get()
matrix_inv = np.array(gp.matrix_world.inverted(), dtype='float64')#.inverted()
new_strokes = gp.data.layers.active.active_frame.strokes[-len(strokes_data):]
for new_stroke, stroke_data in zip(new_strokes, strokes_data):
world_co_3d = [] # np.array(len()dtype='float64')#np.
for stroke, point_co, object_hit, hit_location, tri_a, tri_indices in stroke_data:
eval_ob = object_hit.evaluated_get(dg)
tri_b = [eval_ob.data.vertices[i].co for i in tri_indices]
tri_b = matrix_transform(tri_b, eval_ob.matrix_world)
new_loc = barycentric_transform(hit_location, *tri_a, *tri_b)
world_co_3d.append(new_loc)
# Reproject on plane
new_world_co_3d = [intersect_line_plane(origin, p, plan_co, plane_no) for p in world_co_3d]
new_local_co_3d = matrix_transform(new_world_co_3d, matrix_inv)
nb_points = len(new_stroke.points)
new_stroke.points.foreach_set('co', new_local_co_3d.reshape(nb_points*3))
new_stroke.points.update()
## Reset autokey status
context.tool_settings.use_keyframe_insert_auto = auto_key_status
return {'FINISHED'}
classes = (
GP_OT_interpolate_stroke_simple,
)
def register():
for c in classes:
bpy.utils.register_class(c)
def unregister():
for c in reversed(classes):
bpy.utils.unregister_class(c)