5dbf9e09a8
I don't even know why this operator was ever made to work in object mode. That said, since it does, we should have different options for it (or rather, always do all faces for it).
697 lines
22 KiB
Python
697 lines
22 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 compliant>
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import bpy
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from bpy.types import Operator
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import mathutils
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class prettyface:
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__slots__ = (
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"uv",
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"width",
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"height",
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"children",
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"xoff",
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"yoff",
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"has_parent",
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"rot",
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)
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def __init__(self, data):
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self.has_parent = False
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self.rot = False # only used for triangles
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self.xoff = 0
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self.yoff = 0
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if type(data) == list: # list of data
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self.uv = None
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# join the data
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if len(data) == 2:
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# 2 vertical blocks
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data[1].xoff = data[0].width
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self.width = data[0].width * 2
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self.height = data[0].height
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elif len(data) == 4:
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# 4 blocks all the same size
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d = data[0].width # dimension x/y are the same
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data[1].xoff += d
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data[2].yoff += d
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data[3].xoff += d
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data[3].yoff += d
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self.width = self.height = d * 2
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# else:
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# print(len(data), data)
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# raise "Error"
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for pf in data:
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pf.has_parent = True
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self.children = data
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elif type(data) == tuple:
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# 2 blender faces
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# f, (len_min, len_mid, len_max)
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self.uv = data
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f1, lens1, lens1ord = data[0]
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if data[1]:
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f2, lens2, lens2ord = data[1]
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self.width = (lens1[lens1ord[0]] + lens2[lens2ord[0]]) / 2.0
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self.height = (lens1[lens1ord[1]] + lens2[lens2ord[1]]) / 2.0
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else: # 1 tri :/
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self.width = lens1[0]
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self.height = lens1[1]
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self.children = []
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else: # blender face
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uv_layer = data.id_data.uv_layers.active.data
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self.uv = [uv_layer[i].uv for i in data.loop_indices]
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# cos = [v.co for v in data]
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cos = [data.id_data.vertices[v].co for v in data.vertices] # XXX25
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if len(self.uv) == 4:
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self.width = ((cos[0] - cos[1]).length + (cos[2] - cos[3]).length) / 2.0
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self.height = ((cos[1] - cos[2]).length + (cos[0] - cos[3]).length) / 2.0
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else:
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# ngon, note:
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# for ngons to calculate the width/height we need to do the
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# whole projection, unlike other faces
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# we store normalized UV's in the faces coords to avoid
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# calculating the projection and rotating it twice.
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no = data.normal
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r = no.rotation_difference(mathutils.Vector((0.0, 0.0, 1.0)))
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cos_2d = [(r * co).xy for co in cos]
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# print(cos_2d)
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angle = mathutils.geometry.box_fit_2d(cos_2d)
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mat = mathutils.Matrix.Rotation(angle, 2)
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cos_2d = [(mat * co) for co in cos_2d]
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xs = [co.x for co in cos_2d]
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ys = [co.y for co in cos_2d]
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xmin = min(xs)
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ymin = min(ys)
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xmax = max(xs)
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ymax = max(ys)
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xspan = xmax - xmin
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yspan = ymax - ymin
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self.width = xspan
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self.height = yspan
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# ngons work different, we store projected result
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# in UV's to avoid having to re-project later.
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for i, co in enumerate(cos_2d):
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self.uv[i][:] = ((co.x - xmin) / xspan,
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(co.y - ymin) / yspan)
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self.children = []
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def spin(self):
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if self.uv and len(self.uv) == 4:
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self.uv = self.uv[1], self.uv[2], self.uv[3], self.uv[0]
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self.width, self.height = self.height, self.width
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self.xoff, self.yoff = self.yoff, self.xoff # not needed?
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self.rot = not self.rot # only for tri pairs and ngons.
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# print("spinning")
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for pf in self.children:
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pf.spin()
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def place(self, xoff, yoff, xfac, yfac, margin_w, margin_h):
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from math import pi
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xoff += self.xoff
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yoff += self.yoff
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for pf in self.children:
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pf.place(xoff, yoff, xfac, yfac, margin_w, margin_h)
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uv = self.uv
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if not uv:
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return
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x1 = xoff
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y1 = yoff
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x2 = xoff + self.width
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y2 = yoff + self.height
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# Scale the values
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x1 = x1 / xfac + margin_w
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x2 = x2 / xfac - margin_w
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y1 = y1 / yfac + margin_h
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y2 = y2 / yfac - margin_h
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# 2 Tri pairs
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if len(uv) == 2:
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# match the order of angle sizes of the 3d verts with the UV angles and rotate.
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def get_tri_angles(v1, v2, v3):
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a1 = (v2 - v1).angle(v3 - v1, pi)
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a2 = (v1 - v2).angle(v3 - v2, pi)
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a3 = pi - (a1 + a2) # a3= (v2 - v3).angle(v1 - v3)
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return [(a1, 0), (a2, 1), (a3, 2)]
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def set_uv(f, p1, p2, p3):
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# cos =
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#v1 = cos[0]-cos[1]
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#v2 = cos[1]-cos[2]
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#v3 = cos[2]-cos[0]
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# angles_co = get_tri_angles(*[v.co for v in f])
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angles_co = get_tri_angles(*[f.id_data.vertices[v].co for v in f.vertices]) # XXX25
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angles_co.sort()
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I = [i for a, i in angles_co]
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uv_layer = f.id_data.uv_layers.active.data
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fuv = [uv_layer[i].uv for i in f.loop_indices]
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if self.rot:
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fuv[I[2]][:] = p1
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fuv[I[1]][:] = p2
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fuv[I[0]][:] = p3
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else:
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fuv[I[2]][:] = p1
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fuv[I[0]][:] = p2
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fuv[I[1]][:] = p3
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f, lens, lensord = uv[0]
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set_uv(f, (x1, y1), (x1, y2 - margin_h), (x2 - margin_w, y1))
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if uv[1]:
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f, lens, lensord = uv[1]
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set_uv(f, (x2, y2), (x2, y1 + margin_h), (x1 + margin_w, y2))
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else: # 1 QUAD
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if len(uv) == 4:
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uv[1][:] = x1, y1
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uv[2][:] = x1, y2
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uv[3][:] = x2, y2
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uv[0][:] = x2, y1
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else:
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# NGon
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xspan = x2 - x1
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yspan = y2 - y1
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for uvco in uv:
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x, y = uvco
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uvco[:] = ((x1 + (x * xspan)),
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(y1 + (y * yspan)))
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def __hash__(self):
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# None unique hash
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return self.width, self.height
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def lightmap_uvpack(meshes,
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PREF_SEL_ONLY=True,
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PREF_NEW_UVLAYER=False,
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PREF_PACK_IN_ONE=False,
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PREF_APPLY_IMAGE=False,
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PREF_IMG_PX_SIZE=512,
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PREF_BOX_DIV=8,
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PREF_MARGIN_DIV=512
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):
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"""
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BOX_DIV if the maximum division of the UV map that
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a box may be consolidated into.
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Basically, a lower value will be slower but waist less space
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and a higher value will have more clumpy boxes but more wasted space
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"""
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import time
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from math import sqrt
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if not meshes:
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return
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t = time.time()
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if PREF_PACK_IN_ONE:
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if PREF_APPLY_IMAGE:
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image = bpy.data.images.new(name="lightmap", width=PREF_IMG_PX_SIZE, height=PREF_IMG_PX_SIZE, alpha=False)
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face_groups = [[]]
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else:
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face_groups = []
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for me in meshes:
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if PREF_SEL_ONLY:
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faces = [f for f in me.polygons if f.select]
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else:
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faces = me.polygons[:]
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if PREF_PACK_IN_ONE:
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face_groups[0].extend(faces)
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else:
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face_groups.append(faces)
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if PREF_NEW_UVLAYER:
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me.uv_layers.new()
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# Add face UV if it does not exist.
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# All new faces are selected.
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if not me.uv_layers:
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me.uv_layers.new()
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for face_sel in face_groups:
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print("\nStarting unwrap")
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if not face_sel:
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continue
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pretty_faces = [prettyface(f) for f in face_sel if f.loop_total >= 4]
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# Do we have any triangles?
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if len(pretty_faces) != len(face_sel):
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# Now add triangles, not so simple because we need to pair them up.
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def trylens(f):
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# f must be a tri
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# cos = [v.co for v in f]
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cos = [f.id_data.vertices[v].co for v in f.vertices] # XXX25
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lens = [(cos[0] - cos[1]).length, (cos[1] - cos[2]).length, (cos[2] - cos[0]).length]
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lens_min = lens.index(min(lens))
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lens_max = lens.index(max(lens))
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for i in range(3):
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if i != lens_min and i != lens_max:
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lens_mid = i
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break
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lens_order = lens_min, lens_mid, lens_max
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return f, lens, lens_order
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tri_lengths = [trylens(f) for f in face_sel if f.loop_total == 3]
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del trylens
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def trilensdiff(t1, t2):
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return (abs(t1[1][t1[2][0]] - t2[1][t2[2][0]]) +
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abs(t1[1][t1[2][1]] - t2[1][t2[2][1]]) +
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abs(t1[1][t1[2][2]] - t2[1][t2[2][2]]))
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while tri_lengths:
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tri1 = tri_lengths.pop()
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if not tri_lengths:
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pretty_faces.append(prettyface((tri1, None)))
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break
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best_tri_index = -1
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best_tri_diff = 100000000.0
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for i, tri2 in enumerate(tri_lengths):
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diff = trilensdiff(tri1, tri2)
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if diff < best_tri_diff:
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best_tri_index = i
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best_tri_diff = diff
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pretty_faces.append(prettyface((tri1, tri_lengths.pop(best_tri_index))))
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# Get the min, max and total areas
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max_area = 0.0
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min_area = 100000000.0
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tot_area = 0
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for f in face_sel:
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area = f.area
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if area > max_area:
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max_area = area
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if area < min_area:
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min_area = area
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tot_area += area
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max_len = sqrt(max_area)
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min_len = sqrt(min_area)
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side_len = sqrt(tot_area)
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# Build widths
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curr_len = max_len
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print("\tGenerating lengths...", end="")
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lengths = []
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while curr_len > min_len:
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lengths.append(curr_len)
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curr_len = curr_len / 2.0
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# Don't allow boxes smaller then the margin
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# since we contract on the margin, boxes that are smaller will create errors
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# print(curr_len, side_len/MARGIN_DIV)
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if curr_len / 4.0 < side_len / PREF_MARGIN_DIV:
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break
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if not lengths:
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lengths.append(curr_len)
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# convert into ints
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lengths_to_ints = {}
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l_int = 1
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for l in reversed(lengths):
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lengths_to_ints[l] = l_int
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l_int *= 2
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lengths_to_ints = list(lengths_to_ints.items())
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lengths_to_ints.sort()
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print("done")
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# apply quantized values.
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for pf in pretty_faces:
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w = pf.width
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h = pf.height
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bestw_diff = 1000000000.0
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besth_diff = 1000000000.0
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new_w = 0.0
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new_h = 0.0
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for l, i in lengths_to_ints:
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d = abs(l - w)
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if d < bestw_diff:
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bestw_diff = d
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new_w = i # assign the int version
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d = abs(l - h)
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if d < besth_diff:
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besth_diff = d
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new_h = i # ditto
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pf.width = new_w
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pf.height = new_h
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if new_w > new_h:
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pf.spin()
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print("...done")
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# Since the boxes are sized in powers of 2, we can neatly group them into bigger squares
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# this is done hierarchically, so that we may avoid running the pack function
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# on many thousands of boxes, (under 1k is best) because it would get slow.
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# Using an off and even dict us useful because they are packed differently
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# where w/h are the same, their packed in groups of 4
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# where they are different they are packed in pairs
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#
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# After this is done an external pack func is done that packs the whole group.
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print("\tConsolidating Boxes...", end="")
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even_dict = {} # w/h are the same, the key is an int (w)
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odd_dict = {} # w/h are different, the key is the (w,h)
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for pf in pretty_faces:
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w, h = pf.width, pf.height
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if w == h:
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even_dict.setdefault(w, []).append(pf)
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else:
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odd_dict.setdefault((w, h), []).append(pf)
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# Count the number of boxes consolidated, only used for stats.
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c = 0
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# This is tricky. the total area of all packed boxes, then sqrt() that to get an estimated size
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# this is used then converted into out INT space so we can compare it with
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# the ints assigned to the boxes size
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# and divided by BOX_DIV, basically if BOX_DIV is 8
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# ...then the maximum box consolidation (recursive grouping) will have a max width & height
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# ...1/8th of the UV size.
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# ...limiting this is needed or you end up with bug unused texture spaces
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# ...however if its too high, box-packing is way too slow for high poly meshes.
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float_to_int_factor = lengths_to_ints[0][0]
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if float_to_int_factor > 0:
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max_int_dimension = int(((side_len / float_to_int_factor)) / PREF_BOX_DIV)
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ok = True
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else:
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max_int_dimension = 0.0 # won't be used
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ok = False
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# RECURSIVE pretty face grouping
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while ok:
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ok = False
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# Tall boxes in groups of 2
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for d, boxes in list(odd_dict.items()):
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if d[1] < max_int_dimension:
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# boxes.sort(key=lambda a: len(a.children))
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while len(boxes) >= 2:
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# print("foo", len(boxes))
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ok = True
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c += 1
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pf_parent = prettyface([boxes.pop(), boxes.pop()])
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pretty_faces.append(pf_parent)
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w, h = pf_parent.width, pf_parent.height
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assert(w <= h)
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if w == h:
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even_dict.setdefault(w, []).append(pf_parent)
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else:
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odd_dict.setdefault((w, h), []).append(pf_parent)
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# Even boxes in groups of 4
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for d, boxes in list(even_dict.items()):
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if d < max_int_dimension:
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boxes.sort(key=lambda a: len(a.children))
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while len(boxes) >= 4:
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# print("bar", len(boxes))
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ok = True
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c += 1
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pf_parent = prettyface([boxes.pop(), boxes.pop(), boxes.pop(), boxes.pop()])
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pretty_faces.append(pf_parent)
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w = pf_parent.width # width and weight are the same
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even_dict.setdefault(w, []).append(pf_parent)
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del even_dict
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del odd_dict
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# orig = len(pretty_faces)
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pretty_faces = [pf for pf in pretty_faces if not pf.has_parent]
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# spin every second pretty-face
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# if there all vertical you get less efficiently used texture space
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i = len(pretty_faces)
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d = 0
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while i:
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i -= 1
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pf = pretty_faces[i]
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if pf.width != pf.height:
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d += 1
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if d % 2: # only pack every second
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pf.spin()
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# pass
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print("Consolidated", c, "boxes, done")
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# print("done", orig, len(pretty_faces))
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# boxes2Pack.append([islandIdx, w,h])
|
|
print("\tPacking Boxes", len(pretty_faces), end="...")
|
|
boxes2Pack = [[0.0, 0.0, pf.width, pf.height, i] for i, pf in enumerate(pretty_faces)]
|
|
packWidth, packHeight = mathutils.geometry.box_pack_2d(boxes2Pack)
|
|
|
|
# print(packWidth, packHeight)
|
|
|
|
packWidth = float(packWidth)
|
|
packHeight = float(packHeight)
|
|
|
|
margin_w = ((packWidth) / PREF_MARGIN_DIV) / packWidth
|
|
margin_h = ((packHeight) / PREF_MARGIN_DIV) / packHeight
|
|
|
|
# print(margin_w, margin_h)
|
|
print("done")
|
|
|
|
# Apply the boxes back to the UV coords.
|
|
print("\twriting back UVs", end="")
|
|
for i, box in enumerate(boxes2Pack):
|
|
pretty_faces[i].place(box[0], box[1], packWidth, packHeight, margin_w, margin_h)
|
|
# pf.place(box[1][1], box[1][2], packWidth, packHeight, margin_w, margin_h)
|
|
print("done")
|
|
|
|
if PREF_APPLY_IMAGE:
|
|
pass
|
|
# removed with texface
|
|
'''
|
|
if not PREF_PACK_IN_ONE:
|
|
image = bpy.data.images.new(name="lightmap",
|
|
width=PREF_IMG_PX_SIZE,
|
|
height=PREF_IMG_PX_SIZE,
|
|
)
|
|
|
|
for f in face_sel:
|
|
f.image = image
|
|
'''
|
|
|
|
for me in meshes:
|
|
me.update()
|
|
|
|
print("finished all %.2f " % (time.time() - t))
|
|
|
|
|
|
def unwrap(operator, context, **kwargs):
|
|
# switch to object mode
|
|
is_editmode = context.object and context.object.mode == 'EDIT'
|
|
if is_editmode:
|
|
bpy.ops.object.mode_set(mode='OBJECT', toggle=False)
|
|
|
|
# define list of meshes
|
|
meshes = list({me for obj in context.selected_objects if obj.type == 'MESH' for me in (obj.data,) if me.polygons and me.library is None})
|
|
|
|
if not meshes:
|
|
operator.report({'ERROR'}, "No mesh object")
|
|
return {'CANCELLED'}
|
|
|
|
lightmap_uvpack(meshes, **kwargs)
|
|
|
|
# switch back to edit mode
|
|
if is_editmode:
|
|
bpy.ops.object.mode_set(mode='EDIT', toggle=False)
|
|
|
|
return {'FINISHED'}
|
|
|
|
|
|
from bpy.props import BoolProperty, FloatProperty, IntProperty
|
|
|
|
|
|
class LightMapPack(Operator):
|
|
"""Pack each faces UV's into the UV bounds"""
|
|
bl_idname = "uv.lightmap_pack"
|
|
bl_label = "Lightmap Pack"
|
|
|
|
# Disable REGISTER flag for now because this operator might create new
|
|
# images. This leads to non-proper operator redo because current undo
|
|
# stack is local for edit mode and can not remove images created by this
|
|
# operator.
|
|
# Proper solution would be to make undo stack aware of such things,
|
|
# but for now just disable redo. Keep undo here so unwanted changes to uv
|
|
# coords might be undone.
|
|
# This fixes infinite image creation reported there [#30968] (sergey)
|
|
bl_options = {'UNDO'}
|
|
|
|
PREF_CONTEXT: bpy.props.EnumProperty(
|
|
name="Selection",
|
|
items=(
|
|
('SEL_FACES', "Selected Faces", "Space all UVs evenly"),
|
|
('ALL_FACES', "All Faces", "Average space UVs edge length of each loop"),
|
|
),
|
|
)
|
|
|
|
# Image & UVs...
|
|
PREF_PACK_IN_ONE: BoolProperty(
|
|
name="Share Tex Space",
|
|
description=(
|
|
"Objects Share texture space, map all objects "
|
|
"into 1 uvmap"
|
|
),
|
|
default=True,
|
|
)
|
|
PREF_NEW_UVLAYER: BoolProperty(
|
|
name="New UV Map",
|
|
description="Create a new UV map for every mesh packed",
|
|
default=False,
|
|
)
|
|
PREF_APPLY_IMAGE: BoolProperty(
|
|
name="New Image",
|
|
description=(
|
|
"Assign new images for every mesh (only one if "
|
|
"shared tex space enabled)"
|
|
),
|
|
default=False,
|
|
)
|
|
PREF_IMG_PX_SIZE: IntProperty(
|
|
name="Image Size",
|
|
description="Width and Height for the new image",
|
|
min=64, max=5000,
|
|
default=512,
|
|
)
|
|
# UV Packing...
|
|
PREF_BOX_DIV: IntProperty(
|
|
name="Pack Quality",
|
|
description="Pre Packing before the complex boxpack",
|
|
min=1, max=48,
|
|
default=12,
|
|
)
|
|
PREF_MARGIN_DIV: FloatProperty(
|
|
name="Margin",
|
|
description="Size of the margin as a division of the UV",
|
|
min=0.001, max=1.0,
|
|
default=0.1,
|
|
)
|
|
|
|
def draw(self, context):
|
|
layout = self.layout
|
|
layout.use_property_split = True
|
|
|
|
is_editmode = context.active_object.mode == 'EDIT'
|
|
if is_editmode:
|
|
layout.prop(self, "PREF_CONTEXT")
|
|
|
|
layout.prop(self, "PREF_PACK_IN_ONE")
|
|
layout.prop(self, "PREF_NEW_UVLAYER")
|
|
layout.prop(self, "PREF_APPLY_IMAGE")
|
|
layout.prop(self, "PREF_IMG_PX_SIZE")
|
|
layout.prop(self, "PREF_BOX_DIV")
|
|
layout.prop(self, "PREF_MARGIN_DIV")
|
|
|
|
@classmethod
|
|
def poll(cls, context):
|
|
ob = context.active_object
|
|
return ob and ob.type == 'MESH'
|
|
|
|
def execute(self, context):
|
|
kwargs = self.as_keywords()
|
|
PREF_CONTEXT = kwargs.pop("PREF_CONTEXT")
|
|
|
|
is_editmode = context.active_object.mode == 'EDIT'
|
|
|
|
if not is_editmode:
|
|
kwargs["PREF_SEL_ONLY"] = False
|
|
elif PREF_CONTEXT == 'SEL_FACES':
|
|
kwargs["PREF_SEL_ONLY"] = True
|
|
elif PREF_CONTEXT == 'ALL_FACES':
|
|
kwargs["PREF_SEL_ONLY"] = False
|
|
else:
|
|
raise Exception("invalid context")
|
|
|
|
kwargs["PREF_MARGIN_DIV"] = int(1.0 / (kwargs["PREF_MARGIN_DIV"] / 100.0))
|
|
|
|
return unwrap(self, context, **kwargs)
|
|
|
|
def invoke(self, context, event):
|
|
wm = context.window_manager
|
|
return wm.invoke_props_dialog(self)
|
|
|
|
|
|
classes = (
|
|
LightMapPack,
|
|
)
|