456 lines
14 KiB
Python
456 lines
14 KiB
Python
#!BPY
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"""
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Name: 'Consolidate into one image'
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Blender: 243
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Group: 'Image'
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Tooltip: 'Pack all texture images into 1 image and remap faces.'
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"""
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__author__ = "Campbell Barton"
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__url__ = ("blender", "blenderartists.org")
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__version__ = "1.1a 2009/04/01"
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__bpydoc__ = """\
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This script makes a new image from the used areas of all the images mapped to the selected mesh objects.
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Image are packed into 1 new image that is assigned to the original faces.
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This is usefull for game models where 1 image is faster then many, and saves the labour of manual texture layout in an image editor.
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"""
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# --------------------------------------------------------------------------
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# Auto Texture Layout v1.0 by Campbell Barton (AKA Ideasman)
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# --------------------------------------------------------------------------
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# ***** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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# ***** END GPL LICENCE BLOCK *****
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# --------------------------------------------------------------------------
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# Function to find all the images we use
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import Blender as B
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from Blender.Mathutils import Vector, RotationMatrix
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from Blender.Scene import Render
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import BPyMathutils
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BIGNUM= 1<<30
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TEXMODE= B.Mesh.FaceModes.TEX
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def pointBounds(points):
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'''
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Takes a list of points and returns the
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area, center, bounds
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'''
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ymax= xmax= -BIGNUM
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ymin= xmin= BIGNUM
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for p in points:
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x= p.x
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y= p.y
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if x>xmax: xmax=x
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if y>ymax: ymax=y
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if x<xmin: xmin=x
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if y<ymin: ymin=y
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# area and center
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return\
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(xmax-xmin) * (ymax-ymin),\
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Vector((xmin+xmax)/2, (ymin+ymax)/2),\
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(xmin, ymin, xmax, ymax)
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def bestBoundsRotation(current_points):
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'''
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Takes a list of points and returns the best rotation for those points
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so they fit into the samllest bounding box
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'''
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current_area, cent, bounds= pointBounds(current_points)
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total_rot_angle= 0.0
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rot_angle= 45
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while rot_angle > 0.1:
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mat_pos= RotationMatrix( rot_angle, 2)
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mat_neg= RotationMatrix( -rot_angle, 2)
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new_points_pos= [v*mat_pos for v in current_points]
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area_pos, cent_pos, bounds_pos= pointBounds(new_points_pos)
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# 45d rotations only need to be tested in 1 direction.
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if rot_angle == 45:
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area_neg= area_pos
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else:
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new_points_neg= [v*mat_neg for v in current_points]
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area_neg, cent_neg, bounds_neg= pointBounds(new_points_neg)
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# Works!
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#print 'Testing angle', rot_angle, current_area, area_pos, area_neg
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best_area= min(area_pos, area_neg, current_area)
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if area_pos == best_area:
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current_area= area_pos
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cent= cent_pos
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bounds= bounds_pos
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current_points= new_points_pos
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total_rot_angle+= rot_angle
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elif rot_angle != 45 and area_neg == best_area:
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current_area= area_neg
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cent= cent_neg
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bounds= bounds_neg
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current_points= new_points_neg
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total_rot_angle-= rot_angle
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rot_angle *= 0.5
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# Return the optimal rotation.
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return total_rot_angle
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class faceGroup(object):
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'''
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A Group of faces that all use the same image, each group has its UVs packed into a square.
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'''
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__slots__= 'xmax', 'ymax', 'xmin', 'ymin',\
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'image', 'faces', 'box_pack', 'size', 'ang', 'rot_mat', 'cent'\
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def __init__(self, mesh_list, image, size, PREF_IMAGE_MARGIN):
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self.image= image
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self.size= size
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self.faces= [f for me in mesh_list for f in me.faces if f.mode & TEXMODE and f.image == image]
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# Find the best rotation.
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all_points= [uv for f in self.faces for uv in f.uv]
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bountry_indicies= BPyMathutils.convexHull(all_points)
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bountry_points= [all_points[i] for i in bountry_indicies]
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# Pre Rotation bounds
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self.cent= pointBounds(bountry_points)[1]
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# Get the optimal rotation angle
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self.ang= bestBoundsRotation(bountry_points)
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self.rot_mat= RotationMatrix(self.ang, 2), RotationMatrix(-self.ang, 2)
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# Post rotation bounds
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bounds= pointBounds([\
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((uv-self.cent) * self.rot_mat[0]) + self.cent\
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for uv in bountry_points])[2]
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# Break the bounds into useable values.
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xmin, ymin, xmax, ymax= bounds
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# Store the bounds, include the margin.
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# The bounds rect will need to be rotated to the rotation angle.
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self.xmax= xmax + (PREF_IMAGE_MARGIN/size[0])
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self.xmin= xmin - (PREF_IMAGE_MARGIN/size[0])
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self.ymax= ymax + (PREF_IMAGE_MARGIN/size[1])
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self.ymin= ymin - (PREF_IMAGE_MARGIN/size[1])
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self.box_pack=[\
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0.0, 0.0,\
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size[0]*(self.xmax - self.xmin),\
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size[1]*(self.ymax - self.ymin),\
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image.name]
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'''
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# default.
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self.scale= 1.0
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def set_worldspace_scale(self):
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scale_uv= 0.0
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scale_3d= 0.0
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for f in self.faces:
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for i in xrange(len(f.v)):
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scale_uv+= (f.uv[i]-f.uv[i-1]).length * 0.1
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scale_3d+= (f.v[i].co-f.v[i-1].co).length * 0.1
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self.scale= scale_3d/scale_uv
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'''
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def move2packed(self, width, height):
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'''
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Moves the UV coords to their packed location
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using self.box_pack as the offset, scaler.
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box_pack must be set to its packed location.
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width and weight are the w/h of the overall packed area's bounds.
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'''
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# packedLs is a list of [(anyUniqueID, left, bottom, width, height)...]
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# Width and height in float pixel space.
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# X Is flipped :/
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#offset_x= (1-(self.box_pack[1]/d)) - (((self.xmax-self.xmin) * self.image.size[0])/d)
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offset_x= self.box_pack[0]/width
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offset_y= self.box_pack[1]/height
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for f in self.faces:
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for uv in f.uv:
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uv_rot= ((uv-self.cent) * self.rot_mat[0]) + self.cent
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uv.x= offset_x+ (((uv_rot.x-self.xmin) * self.size[0])/width)
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uv.y= offset_y+ (((uv_rot.y-self.ymin) * self.size[1])/height)
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def consolidate_mesh_images(mesh_list, scn, PREF_IMAGE_PATH, PREF_IMAGE_SIZE, PREF_KEEP_ASPECT, PREF_IMAGE_MARGIN): #, PREF_SIZE_FROM_UV=True):
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'''
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Main packing function
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All meshes from mesh_list must have faceUV else this function will fail.
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'''
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face_groups= {}
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for me in mesh_list:
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for f in me.faces:
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if f.mode & TEXMODE:
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image= f.image
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if image:
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try:
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face_groups[image.name] # will fail if teh groups not added.
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except:
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try:
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size= image.size
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except:
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B.Draw.PupMenu('Aborting: Image cold not be loaded|' + image.name)
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return
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face_groups[image.name]= faceGroup(mesh_list, image, size, PREF_IMAGE_MARGIN)
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if not face_groups:
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B.Draw.PupMenu('No Images found in mesh(es). Aborting!')
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return
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if len(face_groups)<2:
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B.Draw.PupMenu('Only 1 image found|Select a mesh(es) using 2 or more images.')
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return
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'''
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if PREF_SIZE_FROM_UV:
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for fg in face_groups.itervalues():
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fg.set_worldspace_scale()
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'''
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# RENDER THE FACES.
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render_scn= B.Scene.New()
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render_scn.makeCurrent()
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render_context= render_scn.getRenderingContext()
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render_context.setRenderPath('') # so we can ignore any existing path and save to the abs path.
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PREF_IMAGE_PATH_EXPAND= B.sys.expandpath(PREF_IMAGE_PATH) + '.png'
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# TEST THE FILE WRITING.
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try:
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# Can we write to this file???
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f= open(PREF_IMAGE_PATH_EXPAND, 'w')
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f.close()
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except:
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B.Draw.PupMenu('Error%t|Could not write to path|' + PREF_IMAGE_PATH_EXPAND)
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return
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render_context.imageSizeX(PREF_IMAGE_SIZE)
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render_context.imageSizeY(PREF_IMAGE_SIZE)
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render_context.enableOversampling(True)
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render_context.setOversamplingLevel(16)
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render_context.setRenderWinSize(100)
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render_context.setImageType(Render.PNG)
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render_context.enableExtensions(True)
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render_context.enablePremultiply() # No alpha needed.
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render_context.enableRGBAColor()
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render_context.threads = 2
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#Render.EnableDispView() # Broken??
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# New Mesh and Object
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render_mat= B.Material.New()
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render_mat.mode |= \
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B.Material.Modes.SHADELESS | \
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B.Material.Modes.TEXFACE | \
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B.Material.Modes.TEXFACE_ALPHA | \
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B.Material.Modes.ZTRANSP
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render_mat.setAlpha(0.0)
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render_me= B.Mesh.New()
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render_me.verts.extend([Vector(0,0,0)]) # Stupid, dummy vert, preverts errors. when assigning UV's/
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render_ob= B.Object.New('Mesh')
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render_ob.link(render_me)
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render_scn.link(render_ob)
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render_me.materials= [render_mat]
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# New camera and object
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render_cam_data= B.Camera.New('ortho')
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render_cam_ob= B.Object.New('Camera')
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render_cam_ob.link(render_cam_data)
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render_scn.link(render_cam_ob)
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render_scn.objects.camera = render_cam_ob
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render_cam_data.type= 'ortho'
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render_cam_data.scale= 1.0
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# Position the camera
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render_cam_ob.LocZ= 1.0
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render_cam_ob.LocX= 0.5
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render_cam_ob.LocY= 0.5
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# List to send to to boxpack function.
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boxes2Pack= [ fg.box_pack for fg in face_groups.itervalues()]
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packWidth, packHeight = B.Geometry.BoxPack2D(boxes2Pack)
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if PREF_KEEP_ASPECT:
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packWidth= packHeight= max(packWidth, packHeight)
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# packedLs is a list of [(anyUniqueID, left, bottom, width, height)...]
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# Re assign the face groups boxes to the face_group.
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for box in boxes2Pack:
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face_groups[ box[4] ].box_pack= box # box[4] is the ID (image name)
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# Add geometry to the mesh
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for fg in face_groups.itervalues():
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# Add verts clockwise from the bottom left.
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_x= fg.box_pack[0] / packWidth
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_y= fg.box_pack[1] / packHeight
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_w= fg.box_pack[2] / packWidth
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_h= fg.box_pack[3] / packHeight
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render_me.verts.extend([\
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Vector(_x, _y, 0),\
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Vector(_x, _y +_h, 0),\
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Vector(_x + _w, _y +_h, 0),\
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Vector(_x + _w, _y, 0),\
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])
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render_me.faces.extend([\
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render_me.verts[-1],\
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render_me.verts[-2],\
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render_me.verts[-3],\
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render_me.verts[-4],\
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])
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target_face= render_me.faces[-1]
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target_face.image= fg.image
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target_face.mode |= TEXMODE
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# Set the UV's, we need to flip them HOZ?
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target_face.uv[0].x= target_face.uv[1].x= fg.xmax
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target_face.uv[2].x= target_face.uv[3].x= fg.xmin
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target_face.uv[0].y= target_face.uv[3].y= fg.ymin
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target_face.uv[1].y= target_face.uv[2].y= fg.ymax
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for uv in target_face.uv:
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uv_rot= ((uv-fg.cent) * fg.rot_mat[1]) + fg.cent
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uv.x= uv_rot.x
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uv.y= uv_rot.y
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render_context.render()
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Render.CloseRenderWindow()
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render_context.saveRenderedImage(PREF_IMAGE_PATH_EXPAND)
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#if not B.sys.exists(PREF_IMAGE_PATH_EXPAND):
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# raise 'Error!!!'
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# NOW APPLY THE SAVED IMAGE TO THE FACES!
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#print PREF_IMAGE_PATH_EXPAND
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try:
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target_image= B.Image.Load(PREF_IMAGE_PATH_EXPAND)
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except:
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B.Draw.PupMenu('Error: Could not render or load the image at path|' + PREF_IMAGE_PATH_EXPAND)
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return
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# Set to the 1 image.
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for me in mesh_list:
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for f in me.faces:
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if f.mode & TEXMODE and f.image:
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f.image= target_image
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for fg in face_groups.itervalues():
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fg.move2packed(packWidth, packHeight)
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scn.makeCurrent()
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render_me.verts= None # free a tiny amount of memory.
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B.Scene.Unlink(render_scn)
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target_image.makeCurrent()
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def main():
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scn= B.Scene.GetCurrent()
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scn_objects = scn.objects
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ob= scn_objects.active
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if not ob or ob.type != 'Mesh':
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B.Draw.PupMenu('Error, no active mesh object, aborting.')
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return
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# Create the variables.
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# Filename without path or extension.
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newpath= B.Get('filename').split('/')[-1].split('\\')[-1].replace('.blend', '')
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PREF_IMAGE_PATH = B.Draw.Create('//%s_grp' % newpath)
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PREF_IMAGE_SIZE = B.Draw.Create(1024)
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PREF_IMAGE_MARGIN = B.Draw.Create(6)
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PREF_KEEP_ASPECT = B.Draw.Create(0)
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PREF_ALL_SEL_OBS = B.Draw.Create(0)
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pup_block = [\
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'Image Path: (no ext)',\
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('', PREF_IMAGE_PATH, 3, 100, 'Path to new Image. "//" for curent blend dir.'),\
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'Image Options',
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('Pixel Size:', PREF_IMAGE_SIZE, 64, 4096, 'Image Width and Height.'),\
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('Pixel Margin:', PREF_IMAGE_MARGIN, 0, 64, 'Use a margin to stop mipmapping artifacts.'),\
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('Keep Aspect', PREF_KEEP_ASPECT, 'If disabled, will stretch the images to the bounds of the texture'),\
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'Texture Source',\
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('All Sel Objects', PREF_ALL_SEL_OBS, 'Combine all selected objects into 1 texture, otherwise active object only.'),\
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]
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if not B.Draw.PupBlock('Consolidate images...', pup_block):
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return
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PREF_IMAGE_PATH= PREF_IMAGE_PATH.val
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PREF_IMAGE_SIZE= PREF_IMAGE_SIZE.val
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PREF_IMAGE_MARGIN= float(PREF_IMAGE_MARGIN.val) # important this is a float otherwise division wont work properly
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PREF_KEEP_ASPECT= PREF_KEEP_ASPECT.val
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PREF_ALL_SEL_OBS= PREF_ALL_SEL_OBS.val
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if PREF_ALL_SEL_OBS:
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mesh_list= [ob.getData(mesh=1) for ob in scn_objects.context if ob.type=='Mesh']
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# Make sure we have no doubles- dict by name, then get the values back.
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for me in mesh_list: me.tag = False
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mesh_list_new = []
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for me in mesh_list:
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if me.faceUV and me.tag==False:
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me.tag = True
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mesh_list_new.append(me)
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# replace list with possible doubles
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mesh_list = mesh_list_new
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else:
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mesh_list= [ob.getData(mesh=1)]
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if not mesh_list[0].faceUV:
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B.Draw.PupMenu('Error, active mesh has no images, Aborting!')
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return
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consolidate_mesh_images(mesh_list, scn, PREF_IMAGE_PATH, PREF_IMAGE_SIZE, PREF_KEEP_ASPECT, PREF_IMAGE_MARGIN)
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B.Window.RedrawAll()
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if __name__=='__main__':
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main()
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