478 lines
18 KiB
Python
478 lines
18 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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# --------------------------- LATTICE ALONG SURFACE -------------------------- #
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# -------------------------------- version 0.3 ------------------------------- #
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# #
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# Automatically generate and assign a lattice that follows the active surface. #
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# #
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# (c) Alessandro Zomparelli #
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# (2017) #
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# #
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# http://www.co-de-it.com/ #
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# #
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# ############################################################################ #
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import bpy
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import bmesh
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from bpy.types import Operator
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from bpy.props import (BoolProperty, StringProperty, FloatProperty)
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from mathutils import Vector
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from .utils import *
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def not_in(element, grid):
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output = True
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for loop in grid:
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if element in loop:
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output = False
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break
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return output
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def grid_from_mesh(mesh, swap_uv):
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bm = bmesh.new()
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bm.from_mesh(mesh)
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verts_grid = []
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edges_grid = []
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faces_grid = []
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running_grid = True
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while running_grid:
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verts_loop = []
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edges_loop = []
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faces_loop = []
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# storing first point
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verts_candidates = []
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if len(faces_grid) == 0:
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# for first loop check all vertices
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verts_candidates = bm.verts
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else:
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# for other loops start form the vertices of the first face
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# the last loop, skipping already used vertices
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verts_candidates = [v for v in bm.faces[faces_grid[-1][0]].verts if not_in(v.index, verts_grid)]
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# check for last loop
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is_last = False
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for vert in verts_candidates:
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if len(vert.link_faces) == 1: # check if corner vertex
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vert.select = True
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verts_loop.append(vert.index)
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is_last = True
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break
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if not is_last:
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for vert in verts_candidates:
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new_link_faces = [f for f in vert.link_faces if not_in(f.index, faces_grid)]
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if len(new_link_faces) < 2: # check if corner vertex
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vert.select = True
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verts_loop.append(vert.index)
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break
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running_loop = len(verts_loop) > 0
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while running_loop:
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bm.verts.ensure_lookup_table()
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id = verts_loop[-1]
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link_edges = bm.verts[id].link_edges
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# storing second point
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if len(verts_loop) == 1: # only one vertex stored in the loop
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if len(faces_grid) == 0: # first loop #
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edge = link_edges[swap_uv] # chose direction
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for vert in edge.verts:
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if vert.index != id:
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vert.select = True
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verts_loop.append(vert.index) # new vertex
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edges_loop.append(edge.index) # chosen edge
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faces_loop.append(edge.link_faces[0].index) # only one face
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# edge.link_faces[0].select = True
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else: # other loops #
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# start from the edges of the first face of the last loop
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for edge in bm.faces[faces_grid[-1][0]].edges:
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# chose an edge starting from the first vertex that is not returning back
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if bm.verts[verts_loop[0]] in edge.verts and \
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bm.verts[verts_grid[-1][0]] not in edge.verts:
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for vert in edge.verts:
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if vert.index != id:
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vert.select = True
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verts_loop.append(vert.index)
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edges_loop.append(edge.index)
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for face in edge.link_faces:
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if not_in(face.index, faces_grid):
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faces_loop.append(face.index)
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# continuing the loop
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else:
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for edge in link_edges:
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for vert in edge.verts:
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store_data = False
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if not_in(vert.index, verts_grid) and vert.index not in verts_loop:
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if len(faces_loop) > 0:
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bm.faces.ensure_lookup_table()
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if vert not in bm.faces[faces_loop[-1]].verts:
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store_data = True
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else:
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store_data = True
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if store_data:
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vert.select = True
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verts_loop.append(vert.index)
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edges_loop.append(edge.index)
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for face in edge.link_faces:
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if not_in(face.index, faces_grid):
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faces_loop.append(face.index)
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break
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# ending condition
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if verts_loop[-1] == id or verts_loop[-1] == verts_loop[0]:
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running_loop = False
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verts_grid.append(verts_loop)
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edges_grid.append(edges_loop)
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faces_grid.append(faces_loop)
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if len(faces_loop) == 0:
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running_grid = False
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return verts_grid, edges_grid, faces_grid
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class lattice_along_surface(Operator):
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bl_idname = "object.lattice_along_surface"
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bl_label = "Lattice along Surface"
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bl_description = ("Automatically add a Lattice modifier to the selected "
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"object, adapting it to the active one.\nThe active "
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"object must be a rectangular grid compatible with the "
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"Lattice's topology")
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bl_options = {'REGISTER', 'UNDO'}
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set_parent : BoolProperty(
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name="Set Parent",
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default=True,
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description="Automatically set the Lattice as parent"
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)
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flipNormals : BoolProperty(
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name="Flip Normals",
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default=False,
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description="Flip normals direction"
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)
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swapUV : BoolProperty(
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name="Swap UV",
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default=False,
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description="Flip grid's U and V"
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)
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flipU : BoolProperty(
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name="Flip U",
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default=False,
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description="Flip grid's U")
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flipV : BoolProperty(
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name="Flip V",
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default=False,
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description="Flip grid's V"
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)
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flipW : BoolProperty(
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name="Flip W",
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default=False,
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description="Flip grid's W"
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)
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use_groups : BoolProperty(
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name="Vertex Group",
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default=False,
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description="Use active Vertex Group for lattice's thickness"
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)
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high_quality_lattice : BoolProperty(
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name="High quality",
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default=True,
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description="Increase the the subdivisions in normal direction for a "
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"more correct result"
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)
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hide_lattice : BoolProperty(
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name="Hide Lattice",
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default=True,
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description="Automatically hide the Lattice object"
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)
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scale_x : FloatProperty(
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name="Scale X",
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default=1,
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min=0.001,
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max=1,
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description="Object scale"
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)
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scale_y : FloatProperty(
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name="Scale Y", default=1,
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min=0.001,
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max=1,
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description="Object scale"
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)
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scale_z : FloatProperty(
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name="Scale Z",
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default=1,
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min=0.001,
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max=1,
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description="Object scale"
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)
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thickness : FloatProperty(
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name="Thickness",
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default=1,
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soft_min=0,
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soft_max=5,
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description="Lattice thickness"
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)
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displace : FloatProperty(
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name="Displace",
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default=0,
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soft_min=-1,
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soft_max=1,
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description="Lattice displace"
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)
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grid_object = ""
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source_object = ""
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@classmethod
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def poll(cls, context):
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try: return bpy.context.object.mode == 'OBJECT'
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except: return False
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def draw(self, context):
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layout = self.layout
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col = layout.column(align=True)
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col.label(text="Thickness:")
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col.prop(
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self, "thickness", text="Thickness", icon='NONE', expand=False,
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slider=True, toggle=False, icon_only=False, event=False,
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full_event=False, emboss=True, index=-1
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)
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col.prop(
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self, "displace", text="Offset", icon='NONE', expand=False,
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slider=True, toggle=False, icon_only=False, event=False,
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full_event=False, emboss=True, index=-1
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)
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row = col.row()
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row.prop(self, "use_groups")
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col.separator()
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col.label(text="Scale:")
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col.prop(
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self, "scale_x", text="U", icon='NONE', expand=False,
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slider=True, toggle=False, icon_only=False, event=False,
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full_event=False, emboss=True, index=-1
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)
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col.prop(
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self, "scale_y", text="V", icon='NONE', expand=False,
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slider=True, toggle=False, icon_only=False, event=False,
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full_event=False, emboss=True, index=-1
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)
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col.separator()
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col.label(text="Flip:")
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row = col.row()
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row.prop(self, "flipU", text="U")
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row.prop(self, "flipV", text="V")
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row.prop(self, "flipW", text="W")
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col.prop(self, "swapUV")
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col.prop(self, "flipNormals")
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col.separator()
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col.label(text="Lattice Options:")
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col.prop(self, "high_quality_lattice")
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col.prop(self, "hide_lattice")
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col.prop(self, "set_parent")
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def execute(self, context):
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if self.source_object == self.grid_object == "" or True:
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if len(bpy.context.selected_objects) != 2:
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self.report({'ERROR'}, "Please, select two objects")
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return {'CANCELLED'}
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grid_obj = bpy.context.object
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if grid_obj.type not in ('MESH', 'CURVE', 'SURFACE'):
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self.report({'ERROR'}, "The surface object is not valid. Only Mesh,"
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"Curve and Surface objects are allowed.")
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return {'CANCELLED'}
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obj = None
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for o in bpy.context.selected_objects:
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if o.name != grid_obj.name and o.type in \
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('MESH', 'CURVE', 'SURFACE', 'FONT'):
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obj = o
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o.select_set(False)
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break
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try:
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obj_dim = obj.dimensions
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obj_me = simple_to_mesh(obj)#obj.to_mesh(bpy.context.depsgraph, apply_modifiers=True)
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except:
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self.report({'ERROR'}, "The object to deform is not valid. Only "
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"Mesh, Curve, Surface and Font objects are allowed.")
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return {'CANCELLED'}
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self.grid_object = grid_obj.name
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self.source_object = obj.name
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else:
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grid_obj = bpy.data.objects[self.grid_object]
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obj = bpy.data.objects[self.source_object]
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obj_me = simple_to_mesh(obj)# obj.to_mesh(bpy.context.depsgraph, apply_modifiers=True)
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for o in bpy.context.selected_objects: o.select_set(False)
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grid_obj.select_set(True)
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bpy.context.view_layer.objects.active = grid_obj
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temp_grid_obj = grid_obj.copy()
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temp_grid_obj.data = simple_to_mesh(grid_obj)
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grid_mesh = temp_grid_obj.data
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for v in grid_mesh.vertices:
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v.co = grid_obj.matrix_world @ v.co
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grid_mesh.calc_normals()
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if len(grid_mesh.polygons) > 64 * 64:
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bpy.data.objects.remove(temp_grid_obj)
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bpy.context.view_layer.objects.active = obj
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obj.select_set(True)
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self.report({'ERROR'}, "Maximum resolution allowed for Lattice is 64")
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return {'CANCELLED'}
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# CREATING LATTICE
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min = Vector((0, 0, 0))
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max = Vector((0, 0, 0))
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first = True
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for v in obj_me.vertices:
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v0 = v.co.copy()
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vert = obj.matrix_world @ v0
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if vert[0] < min[0] or first:
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min[0] = vert[0]
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if vert[1] < min[1] or first:
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min[1] = vert[1]
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if vert[2] < min[2] or first:
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min[2] = vert[2]
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if vert[0] > max[0] or first:
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max[0] = vert[0]
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if vert[1] > max[1] or first:
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max[1] = vert[1]
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if vert[2] > max[2] or first:
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max[2] = vert[2]
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first = False
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bb = max - min
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lattice_loc = (max + min) / 2
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bpy.ops.object.add(type='LATTICE')
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lattice = bpy.context.active_object
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lattice.location = lattice_loc
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lattice.scale = Vector((bb.x / self.scale_x, bb.y / self.scale_y,
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bb.z / self.scale_z))
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if bb.x == 0:
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lattice.scale.x = 1
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if bb.y == 0:
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lattice.scale.y = 1
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if bb.z == 0:
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lattice.scale.z = 1
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bpy.context.view_layer.objects.active = obj
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bpy.ops.object.modifier_add(type='LATTICE')
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obj.modifiers[-1].object = lattice
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# set as parent
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if self.set_parent:
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obj.select_set(True)
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lattice.select_set(True)
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bpy.context.view_layer.objects.active = lattice
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bpy.ops.object.parent_set(type='LATTICE')
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# reading grid structure
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verts_grid, edges_grid, faces_grid = grid_from_mesh(
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grid_mesh,
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swap_uv=self.swapUV
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)
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nu = len(verts_grid)
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nv = len(verts_grid[0])
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nw = 2
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scale_normal = self.thickness
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try:
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lattice.data.points_u = nu
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lattice.data.points_v = nv
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lattice.data.points_w = nw
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for i in range(nu):
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for j in range(nv):
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for w in range(nw):
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if self.use_groups:
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try:
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displace = temp_grid_obj.vertex_groups.active.weight(
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verts_grid[i][j]) * scale_normal * bb.z
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except:
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displace = 0#scale_normal * bb.z
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else:
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displace = scale_normal * bb.z
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target_point = (grid_mesh.vertices[verts_grid[i][j]].co +
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grid_mesh.vertices[verts_grid[i][j]].normal *
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(w + self.displace / 2 - 0.5) * displace) - lattice.location
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if self.flipW:
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w = 1 - w
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if self.flipU:
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i = nu - i - 1
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if self.flipV:
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j = nv - j - 1
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lattice.data.points[i + j * nu + w * nu * nv].co_deform.x = \
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target_point.x / bpy.data.objects[lattice.name].scale.x
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lattice.data.points[i + j * nu + w * nu * nv].co_deform.y = \
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target_point.y / bpy.data.objects[lattice.name].scale.y
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lattice.data.points[i + j * nu + w * nu * nv].co_deform.z = \
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target_point.z / bpy.data.objects[lattice.name].scale.z
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except:
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bpy.ops.object.mode_set(mode='OBJECT')
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temp_grid_obj.select_set(True)
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lattice.select_set(True)
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obj.select_set(False)
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bpy.ops.object.delete(use_global=False)
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bpy.context.view_layer.objects.active = obj
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obj.select_set(True)
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bpy.ops.object.modifier_remove(modifier=obj.modifiers[-1].name)
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if nu > 64 or nv > 64:
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self.report({'ERROR'}, "Maximum resolution allowed for Lattice is 64")
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return {'CANCELLED'}
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else:
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self.report({'ERROR'}, "The grid mesh is not correct")
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return {'CANCELLED'}
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bpy.ops.object.mode_set(mode='OBJECT')
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#grid_obj.select_set(True)
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#lattice.select_set(False)
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obj.select_set(False)
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#bpy.ops.object.delete(use_global=False)
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bpy.context.view_layer.objects.active = lattice
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lattice.select_set(True)
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if self.high_quality_lattice:
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bpy.context.object.data.points_w = 8
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else:
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bpy.context.object.data.use_outside = True
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if self.hide_lattice:
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bpy.ops.object.hide_view_set(unselected=False)
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bpy.context.view_layer.objects.active = obj
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obj.select_set(True)
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lattice.select_set(False)
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if self.flipNormals:
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try:
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bpy.ops.object.mode_set(mode='EDIT')
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bpy.ops.mesh.select_all(action='SELECT')
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bpy.ops.mesh.flip_normals()
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bpy.ops.object.mode_set(mode='OBJECT')
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except:
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pass
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bpy.data.meshes.remove(grid_mesh)
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bpy.data.meshes.remove(obj_me)
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return {'FINISHED'}
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