forked from bartvdbraak/blender
631 lines
20 KiB
Python
631 lines
20 KiB
Python
# ##### 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 #####
|
|
|
|
# <pep8 compliant>
|
|
|
|
import bpy
|
|
from bpy.types import Operator
|
|
import mathutils
|
|
|
|
|
|
class prettyface(object):
|
|
__slots__ = ("uv",
|
|
"width",
|
|
"height",
|
|
"children",
|
|
"xoff",
|
|
"yoff",
|
|
"has_parent",
|
|
"rot",
|
|
)
|
|
|
|
def __init__(self, data):
|
|
self.has_parent = False
|
|
self.rot = False # only used for triangles
|
|
self.xoff = 0
|
|
self.yoff = 0
|
|
|
|
if type(data) == list: # list of data
|
|
self.uv = None
|
|
|
|
# join the data
|
|
if len(data) == 2:
|
|
# 2 vertical blocks
|
|
data[1].xoff = data[0].width
|
|
self.width = data[0].width * 2
|
|
self.height = data[0].height
|
|
|
|
elif len(data) == 4:
|
|
# 4 blocks all the same size
|
|
d = data[0].width # dimension x/y are the same
|
|
|
|
data[1].xoff += d
|
|
data[2].yoff += d
|
|
|
|
data[3].xoff += d
|
|
data[3].yoff += d
|
|
|
|
self.width = self.height = d * 2
|
|
|
|
#else:
|
|
# print(len(data), data)
|
|
# raise "Error"
|
|
|
|
for pf in data:
|
|
pf.has_parent = True
|
|
|
|
self.children = data
|
|
|
|
elif type(data) == tuple:
|
|
# 2 blender faces
|
|
# f, (len_min, len_mid, len_max)
|
|
self.uv = data
|
|
|
|
f1, lens1, lens1ord = data[0]
|
|
if data[1]:
|
|
f2, lens2, lens2ord = data[1]
|
|
self.width = (lens1[lens1ord[0]] + lens2[lens2ord[0]]) / 2.0
|
|
self.height = (lens1[lens1ord[1]] + lens2[lens2ord[1]]) / 2.0
|
|
else: # 1 tri :/
|
|
self.width = lens1[0]
|
|
self.height = lens1[1]
|
|
|
|
self.children = []
|
|
|
|
else: # blender face
|
|
uv_layer = data.id_data.uv_layers.active.data
|
|
self.uv = [uv_layer[i].uv for i in data.loop_indices]
|
|
|
|
# cos = [v.co for v in data]
|
|
cos = [data.id_data.vertices[v].co for v in data.vertices] # XXX25
|
|
|
|
self.width = ((cos[0] - cos[1]).length + (cos[2] - cos[3]).length) / 2.0
|
|
self.height = ((cos[1] - cos[2]).length + (cos[0] - cos[3]).length) / 2.0
|
|
|
|
self.children = []
|
|
|
|
def spin(self):
|
|
if self.uv and len(self.uv) == 4:
|
|
self.uv = self.uv[1], self.uv[2], self.uv[3], self.uv[0]
|
|
|
|
self.width, self.height = self.height, self.width
|
|
self.xoff, self.yoff = self.yoff, self.xoff # not needed?
|
|
self.rot = not self.rot # only for tri pairs.
|
|
# print("spinning")
|
|
for pf in self.children:
|
|
pf.spin()
|
|
|
|
def place(self, xoff, yoff, xfac, yfac, margin_w, margin_h):
|
|
from math import pi
|
|
|
|
xoff += self.xoff
|
|
yoff += self.yoff
|
|
|
|
for pf in self.children:
|
|
pf.place(xoff, yoff, xfac, yfac, margin_w, margin_h)
|
|
|
|
uv = self.uv
|
|
if not uv:
|
|
return
|
|
|
|
x1 = xoff
|
|
y1 = yoff
|
|
x2 = xoff + self.width
|
|
y2 = yoff + self.height
|
|
|
|
# Scale the values
|
|
x1 = x1 / xfac + margin_w
|
|
x2 = x2 / xfac - margin_w
|
|
y1 = y1 / yfac + margin_h
|
|
y2 = y2 / yfac - margin_h
|
|
|
|
# 2 Tri pairs
|
|
if len(uv) == 2:
|
|
# match the order of angle sizes of the 3d verts with the UV angles and rotate.
|
|
def get_tri_angles(v1, v2, v3):
|
|
a1 = (v2 - v1).angle(v3 - v1, pi)
|
|
a2 = (v1 - v2).angle(v3 - v2, pi)
|
|
a3 = pi - (a1 + a2) # a3= (v2 - v3).angle(v1 - v3)
|
|
|
|
return [(a1, 0), (a2, 1), (a3, 2)]
|
|
|
|
def set_uv(f, p1, p2, p3):
|
|
|
|
# cos =
|
|
#v1 = cos[0]-cos[1]
|
|
#v2 = cos[1]-cos[2]
|
|
#v3 = cos[2]-cos[0]
|
|
|
|
# angles_co = get_tri_angles(*[v.co for v in f])
|
|
angles_co = get_tri_angles(*[f.id_data.vertices[v].co for v in f.vertices]) # XXX25
|
|
|
|
angles_co.sort()
|
|
I = [i for a, i in angles_co]
|
|
|
|
uv_layer = f.id_data.uv_layers.active.data
|
|
fuv = [uv_layer[i].uv for i in f.loop_indices]
|
|
|
|
if self.rot:
|
|
fuv[I[2]][:] = p1
|
|
fuv[I[1]][:] = p2
|
|
fuv[I[0]][:] = p3
|
|
else:
|
|
fuv[I[2]][:] = p1
|
|
fuv[I[0]][:] = p2
|
|
fuv[I[1]][:] = p3
|
|
|
|
f, lens, lensord = uv[0]
|
|
|
|
set_uv(f, (x1, y1), (x1, y2 - margin_h), (x2 - margin_w, y1))
|
|
|
|
if uv[1]:
|
|
f, lens, lensord = uv[1]
|
|
set_uv(f, (x2, y2), (x2, y1 + margin_h), (x1 + margin_w, y2))
|
|
|
|
else: # 1 QUAD
|
|
uv[1][:] = x1, y1
|
|
uv[2][:] = x1, y2
|
|
uv[3][:] = x2, y2
|
|
uv[0][:] = x2, y1
|
|
|
|
def __hash__(self):
|
|
# None unique hash
|
|
return self.width, self.height
|
|
|
|
|
|
def lightmap_uvpack(meshes,
|
|
PREF_SEL_ONLY=True,
|
|
PREF_NEW_UVLAYER=False,
|
|
PREF_PACK_IN_ONE=False,
|
|
PREF_APPLY_IMAGE=False,
|
|
PREF_IMG_PX_SIZE=512,
|
|
PREF_BOX_DIV=8,
|
|
PREF_MARGIN_DIV=512
|
|
):
|
|
'''
|
|
BOX_DIV if the maximum division of the UV map that
|
|
a box may be consolidated into.
|
|
Basically, a lower value will be slower but waist less space
|
|
and a higher value will have more clumpy boxes but more wasted space
|
|
'''
|
|
import time
|
|
from math import sqrt
|
|
|
|
if not meshes:
|
|
return
|
|
|
|
t = time.time()
|
|
|
|
if PREF_PACK_IN_ONE:
|
|
if PREF_APPLY_IMAGE:
|
|
image = bpy.data.images.new(name="lightmap", width=PREF_IMG_PX_SIZE, height=PREF_IMG_PX_SIZE, alpha=False)
|
|
face_groups = [[]]
|
|
else:
|
|
face_groups = []
|
|
|
|
for me in meshes:
|
|
if PREF_SEL_ONLY:
|
|
faces = [f for f in me.polygons if f.select]
|
|
else:
|
|
faces = me.polygons[:]
|
|
|
|
if PREF_PACK_IN_ONE:
|
|
face_groups[0].extend(faces)
|
|
else:
|
|
face_groups.append(faces)
|
|
|
|
if PREF_NEW_UVLAYER:
|
|
me.uv_textures.new()
|
|
|
|
# Add face UV if it does not exist.
|
|
# All new faces are selected.
|
|
if not me.uv_textures:
|
|
me.uv_textures.new()
|
|
|
|
for face_sel in face_groups:
|
|
print("\nStarting unwrap")
|
|
|
|
if len(face_sel) < 4:
|
|
print("\tWarning, less then 4 faces, skipping")
|
|
continue
|
|
|
|
pretty_faces = [prettyface(f) for f in face_sel if f.loop_total == 4]
|
|
|
|
# Do we have any triangles?
|
|
if len(pretty_faces) != len(face_sel):
|
|
|
|
# Now add triangles, not so simple because we need to pair them up.
|
|
def trylens(f):
|
|
# f must be a tri
|
|
|
|
# cos = [v.co for v in f]
|
|
cos = [f.id_data.vertices[v].co for v in f.vertices] # XXX25
|
|
|
|
lens = [(cos[0] - cos[1]).length, (cos[1] - cos[2]).length, (cos[2] - cos[0]).length]
|
|
|
|
lens_min = lens.index(min(lens))
|
|
lens_max = lens.index(max(lens))
|
|
for i in range(3):
|
|
if i != lens_min and i != lens_max:
|
|
lens_mid = i
|
|
break
|
|
lens_order = lens_min, lens_mid, lens_max
|
|
|
|
return f, lens, lens_order
|
|
|
|
tri_lengths = [trylens(f) for f in face_sel if f.loop_total == 3]
|
|
del trylens
|
|
|
|
def trilensdiff(t1, t2):
|
|
return (abs(t1[1][t1[2][0]] - t2[1][t2[2][0]]) +
|
|
abs(t1[1][t1[2][1]] - t2[1][t2[2][1]]) +
|
|
abs(t1[1][t1[2][2]] - t2[1][t2[2][2]]))
|
|
|
|
while tri_lengths:
|
|
tri1 = tri_lengths.pop()
|
|
|
|
if not tri_lengths:
|
|
pretty_faces.append(prettyface((tri1, None)))
|
|
break
|
|
|
|
best_tri_index = -1
|
|
best_tri_diff = 100000000.0
|
|
|
|
for i, tri2 in enumerate(tri_lengths):
|
|
diff = trilensdiff(tri1, tri2)
|
|
if diff < best_tri_diff:
|
|
best_tri_index = i
|
|
best_tri_diff = diff
|
|
|
|
pretty_faces.append(prettyface((tri1, tri_lengths.pop(best_tri_index))))
|
|
|
|
# Get the min, max and total areas
|
|
max_area = 0.0
|
|
min_area = 100000000.0
|
|
tot_area = 0
|
|
for f in face_sel:
|
|
area = f.area
|
|
if area > max_area:
|
|
max_area = area
|
|
if area < min_area:
|
|
min_area = area
|
|
tot_area += area
|
|
|
|
max_len = sqrt(max_area)
|
|
min_len = sqrt(min_area)
|
|
side_len = sqrt(tot_area)
|
|
|
|
# Build widths
|
|
|
|
curr_len = max_len
|
|
|
|
print("\tGenerating lengths...", end="")
|
|
|
|
lengths = []
|
|
while curr_len > min_len:
|
|
lengths.append(curr_len)
|
|
curr_len = curr_len / 2.0
|
|
|
|
# Don't allow boxes smaller then the margin
|
|
# since we contract on the margin, boxes that are smaller will create errors
|
|
# print(curr_len, side_len/MARGIN_DIV)
|
|
if curr_len / 4.0 < side_len / PREF_MARGIN_DIV:
|
|
break
|
|
|
|
if not lengths:
|
|
lengths.append(curr_len)
|
|
|
|
# convert into ints
|
|
lengths_to_ints = {}
|
|
|
|
l_int = 1
|
|
for l in reversed(lengths):
|
|
lengths_to_ints[l] = l_int
|
|
l_int *= 2
|
|
|
|
lengths_to_ints = list(lengths_to_ints.items())
|
|
lengths_to_ints.sort()
|
|
print("done")
|
|
|
|
# apply quantized values.
|
|
|
|
for pf in pretty_faces:
|
|
w = pf.width
|
|
h = pf.height
|
|
bestw_diff = 1000000000.0
|
|
besth_diff = 1000000000.0
|
|
new_w = 0.0
|
|
new_h = 0.0
|
|
for l, i in lengths_to_ints:
|
|
d = abs(l - w)
|
|
if d < bestw_diff:
|
|
bestw_diff = d
|
|
new_w = i # assign the int version
|
|
|
|
d = abs(l - h)
|
|
if d < besth_diff:
|
|
besth_diff = d
|
|
new_h = i # ditto
|
|
|
|
pf.width = new_w
|
|
pf.height = new_h
|
|
|
|
if new_w > new_h:
|
|
pf.spin()
|
|
|
|
print("...done")
|
|
|
|
# Since the boxes are sized in powers of 2, we can neatly group them into bigger squares
|
|
# this is done hierarchically, so that we may avoid running the pack function
|
|
# on many thousands of boxes, (under 1k is best) because it would get slow.
|
|
# Using an off and even dict us useful because they are packed differently
|
|
# where w/h are the same, their packed in groups of 4
|
|
# where they are different they are packed in pairs
|
|
#
|
|
# After this is done an external pack func is done that packs the whole group.
|
|
|
|
print("\tConsolidating Boxes...", end="")
|
|
even_dict = {} # w/h are the same, the key is an int (w)
|
|
odd_dict = {} # w/h are different, the key is the (w,h)
|
|
|
|
for pf in pretty_faces:
|
|
w, h = pf.width, pf.height
|
|
if w == h:
|
|
even_dict.setdefault(w, []).append(pf)
|
|
else:
|
|
odd_dict.setdefault((w, h), []).append(pf)
|
|
|
|
# Count the number of boxes consolidated, only used for stats.
|
|
c = 0
|
|
|
|
# This is tricky. the total area of all packed boxes, then sqrt() that to get an estimated size
|
|
# this is used then converted into out INT space so we can compare it with
|
|
# the ints assigned to the boxes size
|
|
# and divided by BOX_DIV, basically if BOX_DIV is 8
|
|
# ...then the maximum box consolidation (recursive grouping) will have a max width & height
|
|
# ...1/8th of the UV size.
|
|
# ...limiting this is needed or you end up with bug unused texture spaces
|
|
# ...however if its too high, box-packing is way too slow for high poly meshes.
|
|
float_to_int_factor = lengths_to_ints[0][0]
|
|
if float_to_int_factor > 0:
|
|
max_int_dimension = int(((side_len / float_to_int_factor)) / PREF_BOX_DIV)
|
|
ok = True
|
|
else:
|
|
max_int_dimension = 0.0 # wont be used
|
|
ok = False
|
|
|
|
# RECURSIVE pretty face grouping
|
|
while ok:
|
|
ok = False
|
|
|
|
# Tall boxes in groups of 2
|
|
for d, boxes in list(odd_dict.items()):
|
|
if d[1] < max_int_dimension:
|
|
#\boxes.sort(key = lambda a: len(a.children))
|
|
while len(boxes) >= 2:
|
|
# print("foo", len(boxes))
|
|
ok = True
|
|
c += 1
|
|
pf_parent = prettyface([boxes.pop(), boxes.pop()])
|
|
pretty_faces.append(pf_parent)
|
|
|
|
w, h = pf_parent.width, pf_parent.height
|
|
|
|
if w > h:
|
|
raise "error"
|
|
|
|
if w == h:
|
|
even_dict.setdefault(w, []).append(pf_parent)
|
|
else:
|
|
odd_dict.setdefault((w, h), []).append(pf_parent)
|
|
|
|
# Even boxes in groups of 4
|
|
for d, boxes in list(even_dict.items()):
|
|
if d < max_int_dimension:
|
|
boxes.sort(key=lambda a: len(a.children))
|
|
|
|
while len(boxes) >= 4:
|
|
# print("bar", len(boxes))
|
|
ok = True
|
|
c += 1
|
|
|
|
pf_parent = prettyface([boxes.pop(), boxes.pop(), boxes.pop(), boxes.pop()])
|
|
pretty_faces.append(pf_parent)
|
|
w = pf_parent.width # width and weight are the same
|
|
even_dict.setdefault(w, []).append(pf_parent)
|
|
|
|
del even_dict
|
|
del odd_dict
|
|
|
|
# orig = len(pretty_faces)
|
|
|
|
pretty_faces = [pf for pf in pretty_faces if not pf.has_parent]
|
|
|
|
# spin every second pretty-face
|
|
# if there all vertical you get less efficiently used texture space
|
|
i = len(pretty_faces)
|
|
d = 0
|
|
while i:
|
|
i -= 1
|
|
pf = pretty_faces[i]
|
|
if pf.width != pf.height:
|
|
d += 1
|
|
if d % 2: # only pack every second
|
|
pf.spin()
|
|
# pass
|
|
|
|
print("Consolidated", c, "boxes, done")
|
|
# print("done", orig, len(pretty_faces))
|
|
|
|
# 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:
|
|
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
|
|
f.id_data.uv_textures.active.data[f.index].image = image # XXX25
|
|
|
|
for me in meshes:
|
|
me.update()
|
|
|
|
print("finished all %.2f " % (time.time() - t))
|
|
|
|
# Window.RedrawAll()
|
|
|
|
|
|
def unwrap(operator, context, **kwargs):
|
|
|
|
is_editmode = (bpy.context.object.mode == 'EDIT')
|
|
if is_editmode:
|
|
bpy.ops.object.mode_set(mode='OBJECT', toggle=False)
|
|
|
|
PREF_ACT_ONLY = kwargs.pop("PREF_ACT_ONLY")
|
|
|
|
meshes = []
|
|
if PREF_ACT_ONLY:
|
|
obj = context.scene.objects.active
|
|
if obj and obj.type == 'MESH':
|
|
meshes = [obj.data]
|
|
else:
|
|
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)
|
|
|
|
if is_editmode:
|
|
bpy.ops.object.mode_set(mode='EDIT', toggle=False)
|
|
|
|
return {'FINISHED'}
|
|
|
|
from bpy.props import BoolProperty, FloatProperty, IntProperty
|
|
|
|
|
|
class LightMapPack(Operator):
|
|
'''Follow UVs from active quads along continuous face loops'''
|
|
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
|
|
# oprtator.
|
|
# 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 evently"),
|
|
('ALL_FACES', "All Faces", "Average space UVs edge length of each loop"),
|
|
('ALL_OBJECTS', "Selected Mesh Object", "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 execute(self, context):
|
|
kwargs = self.as_keywords()
|
|
PREF_CONTEXT = kwargs.pop("PREF_CONTEXT")
|
|
|
|
if PREF_CONTEXT == 'SEL_FACES':
|
|
kwargs["PREF_ACT_ONLY"] = True
|
|
kwargs["PREF_SEL_ONLY"] = True
|
|
elif PREF_CONTEXT == 'ALL_FACES':
|
|
kwargs["PREF_ACT_ONLY"] = True
|
|
kwargs["PREF_SEL_ONLY"] = False
|
|
elif PREF_CONTEXT == 'ALL_OBJECTS':
|
|
kwargs["PREF_ACT_ONLY"] = False
|
|
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)
|