diff options
Diffstat (limited to 'uv_magic_uv/impl/mirror_uv_impl.py')
-rw-r--r-- | uv_magic_uv/impl/mirror_uv_impl.py | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/uv_magic_uv/impl/mirror_uv_impl.py b/uv_magic_uv/impl/mirror_uv_impl.py new file mode 100644 index 00000000..e79fbc2c --- /dev/null +++ b/uv_magic_uv/impl/mirror_uv_impl.py @@ -0,0 +1,158 @@ +# <pep8-80 compliant> + +# ##### BEGIN GPL LICENSE BLOCK ##### +# +# 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 2 +# 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 +# MERCHANTABILITY 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, write to the Free Software Foundation, +# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +# +# ##### END GPL LICENSE BLOCK ##### + +__author__ = "Keith (Wahooney) Boshoff, Nutti <nutti.metro@gmail.com>" +__status__ = "production" +__version__ = "5.2" +__date__ = "17 Nov 2018" + +import bmesh +from mathutils import Vector + +from .. import common + + +__all__ = [ + 'is_valid_context', + 'is_vector_similar', + 'mirror_uvs', + 'get_face_center', + 'MirrorUVImpl', +] + + +def is_valid_context(context): + obj = context.object + + # only edit mode is allowed to execute + if obj is None: + return False + if obj.type != 'MESH': + return False + if context.object.mode != 'EDIT': + return False + + # only 'VIEW_3D' space is allowed to execute + for space in context.area.spaces: + if space.type == 'VIEW_3D': + break + else: + return False + + return True + + +def is_vector_similar(v1, v2, error): + """ + Check if two vectors are similar, within an error threshold + """ + within_err_x = abs(v2.x - v1.x) < error + within_err_y = abs(v2.y - v1.y) < error + within_err_z = abs(v2.z - v1.z) < error + + return within_err_x and within_err_y and within_err_z + + +def mirror_uvs(uv_layer, src, dst, axis, error): + """ + Copy UV coordinates from one UV face to another + """ + for sl in src.loops: + suv = sl[uv_layer].uv.copy() + svco = sl.vert.co.copy() + for dl in dst.loops: + dvco = dl.vert.co.copy() + if axis == 'X': + dvco.x = -dvco.x + elif axis == 'Y': + dvco.y = -dvco.y + elif axis == 'Z': + dvco.z = -dvco.z + + if is_vector_similar(svco, dvco, error): + dl[uv_layer].uv = suv.copy() + + +def get_face_center(face): + """ + Get center coordinate of the face + """ + center = Vector((0.0, 0.0, 0.0)) + for v in face.verts: + center = center + v.co + + return center / len(face.verts) + + +class MirrorUVImpl: + @classmethod + def poll(cls, context): + # we can not get area/space/region from console + if common.is_console_mode(): + return True + return is_valid_context(context) + + def execute(self, ops_obj, context): + obj = context.active_object + bm = bmesh.from_edit_mesh(obj.data) + + error = ops_obj.error + axis = ops_obj.axis + + if common.check_version(2, 73, 0) >= 0: + bm.faces.ensure_lookup_table() + if not bm.loops.layers.uv: + ops_obj.report({'WARNING'}, + "Object must have more than one UV map") + return {'CANCELLED'} + uv_layer = bm.loops.layers.uv.verify() + + faces = [f for f in bm.faces if f.select] + for f_dst in faces: + count = len(f_dst.verts) + for f_src in bm.faces: + # check if this is a candidate to do mirror UV + if f_src.index == f_dst.index: + continue + if count != len(f_src.verts): + continue + + # test if the vertices x values are the same sign + dst = get_face_center(f_dst) + src = get_face_center(f_src) + if (dst.x > 0 and src.x > 0) or (dst.x < 0 and src.x < 0): + continue + + # invert source axis + if axis == 'X': + src.x = -src.x + elif axis == 'Y': + src.y = -src.z + elif axis == 'Z': + src.z = -src.z + + # do mirror UV + if is_vector_similar(dst, src, error): + mirror_uvs( + uv_layer, f_src, f_dst, ops_obj.axis, ops_obj.error) + + bmesh.update_edit_mesh(obj.data) + + return {'FINISHED'} |