270 lines
7.5 KiB
Python
270 lines
7.5 KiB
Python
#!BPY
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"""
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Name: 'Billboard Render on Active'
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Blender: 242
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Group: 'Image'
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Tooltip: 'Selected objects and lamps to rendered faces on the act mesh'
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"""
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__author__= "Campbell Barton"
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__url__= ["blender", "blenderartist"]
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__version__= "1.0"
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__bpydoc__= """\
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Render Billboard Script
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This can texture a simple billboard mesh from any number of selected objects.
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Renders objects in the selection to quad faces on the active mesh.
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Usage
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* Light your model or enable the shadless flag so it is visible
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* Make a low poly mesh out of quads with 90d corners. (this will be you billboard mesh)
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* Select the model and any lamps that light it
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* Select the billboard mesh so that it is active
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* Run this script, Adjust settings such as image size or oversampling.
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* Select a place to save the PNG image.
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* Once the script has finished running return to the 3d view by pressing Shift+F5
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* To see the newly applied textures change the drawtype to 'Textured Solid'
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"""
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# ***** BEGIN GPL LICENSE BLOCK *****
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#
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# Script copyright (C) Campbell J Barton 2006
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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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import Blender
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from Blender import Mesh, Material, Draw
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import BPyMathutils
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import bpy
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import BPyRender
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from Blender.Scene import Render
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# reload(BPyRender)
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# reload(BPyMathutils)
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import os
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Vector= Blender.Mathutils.Vector
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def alpha_mat(image):
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# returns a material useable for
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mtl= bpy.data.materials.new()
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mtl.mode |= (Material.Modes.SHADELESS | Material.Modes.ZTRANSP | Material.Modes.FULLOSA | Material.Modes.TEXFACE | Material.Modes.TEXFACE_ALPHA )
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return mtl
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# PupBlock Settings
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GLOBALS= {}
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PREF_RES= Draw.Create(512)
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PREF_TILE_RES= Draw.Create(256)
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PREF_AA = Draw.Create(1)
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PREF_ALPHA= Draw.Create(1)
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PREF_Z_OFFSET = Draw.Create(10.0)
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PREF_IMG_PACK= Draw.Create(1)
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def save_billboard(PREF_IMAGE_PATH):
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Blender.Window.WaitCursor(1)
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# remove png, add it later
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PREF_IMAGE_PATH= PREF_IMAGE_PATH.replace('.png', '')
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ob_sel= GLOBALS['ob_sel']
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me_ob = GLOBALS['me_ob']
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me_data = GLOBALS['me_data']
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time= Blender.sys.time()
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me_mat= me_ob.matrixWorld
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# Render images for all faces
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face_data= [] # Store faces, images etc
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boxes2Pack= []
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me_data.faceUV= True
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for i, f in enumerate(me_data.faces):
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no= f.no
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# Offset the plane by the zoffset on the faces normal
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plane= [v.co * me_mat for v in f]
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# Horizontal stacking, make sure 0,1 and 2,3 are the longest
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if\
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(plane[0]-plane[1]).length + (plane[2]-plane[3]).length < \
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(plane[1]-plane[2]).length + (plane[3]-plane[0]).length:
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plane.append(plane.pop(0))
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rot90= True
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else:
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rot90= False
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no= Blender.Mathutils.QuadNormal(*plane)
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plane= [v + no*PREF_Z_OFFSET.val for v in plane]
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cent= (plane[0]+plane[1]+plane[2]+plane[3] ) /4.0
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camera_matrix= BPyMathutils.plane2mat(plane)
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tmp_path= '%s_%d' % (PREF_IMAGE_PATH, i)
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img= BPyRender.imageFromObjectsOrtho(ob_sel, tmp_path, PREF_TILE_RES.val, PREF_TILE_RES.val, PREF_AA.val, PREF_ALPHA.val, camera_matrix)
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img.reload()
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#img.pack() # se we can keep overwriting the path
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#img.filename= ""
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if rot90:
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f.uv=Vector(1,1), Vector(0,1), Vector(0,0), Vector(1,0)
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else:
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f.uv= Vector(0,1), Vector(0,0), Vector(1,0), Vector(1,1)
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if not PREF_IMG_PACK.val:
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f.mode |= Mesh.FaceModes.TEX
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f.image = img
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if PREF_ALPHA.val:
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f.transp |= Mesh.FaceTranspModes.ALPHA
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else:
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w= ((plane[0]-plane[1]).length + (plane[2]-plane[3]).length)/2
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h= ((plane[1]-plane[2]).length + (plane[3]-plane[0]).length)/2
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face_data.append( (f, img) )
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boxes2Pack.append( [0.0,0.0,h, w, i] )
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if PREF_IMG_PACK.val:
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# pack the quads into a square
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packWidth, packHeight = Blender.Geometry.BoxPack2D(boxes2Pack)
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render_obs= []
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render_mat= alpha_mat(img)
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# Add geometry to the mesh
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for box in boxes2Pack:
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i= box[4]
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orig_f, img= face_data[i]
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# New Mesh and Object
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render_me= bpy.data.meshes.new()
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render_ob= Blender.Object.New('Mesh')
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render_me.materials= [render_mat]
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render_ob.link(render_me)
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render_obs.append(render_ob)
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# Add verts clockwise from the bottom left.
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_x= box[0] / packWidth
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_y= box[1] / packHeight
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_w= box[2] / packWidth
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_h= box[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(list(render_me.verts))
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render_me.faceUV= True
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render_me.faces[0].uv = [Vector(0,0), Vector(0,1), Vector(1,1), Vector(1,0)]
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render_me.faces[0].image = img
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# Set the UV's, we need to flip them HOZ?
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for uv in orig_f.uv:
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uv.x = _x + (uv.x * _w)
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uv.y = _y + (uv.y * _h)
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target_image= BPyRender.imageFromObjectsOrtho(render_obs, PREF_IMAGE_PATH, PREF_RES.val, PREF_RES.val, PREF_AA.val, PREF_ALPHA.val, None)
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target_image.reload() # incase your overwriting an existing image.
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# Set to the 1 image.
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for f in me_data.faces:
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f.image= target_image
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if PREF_ALPHA.val:
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f.transp |= Mesh.FaceTranspModes.ALPHA
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# Free the images data and remove
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for data in face_data:
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img= data[1]
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os.remove(img.filename)
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img.reload()
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# Finish pack
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me_data.update()
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me_ob.makeDisplayList()
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Blender.Window.WaitCursor(0)
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print '%.2f secs taken' % (Blender.sys.time()-time)
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def main():
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scn= bpy.data.scenes.active
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ob_sel= list(scn.objects.context)
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PREF_KEEP_ASPECT= False
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# Error Checking
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if len(ob_sel) < 2:
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Draw.PupMenu("Error%t|Select 2 mesh objects")
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return
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me_ob= scn.objects.active
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if not me_ob:
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Draw.PupMenu("Error%t|No active mesh selected.")
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try:
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ob_sel.remove(me_ob)
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except:
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pass
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if me_ob.type != 'Mesh':
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Draw.PupMenu("Error%t|Active Object must be a mesh to write billboard images too")
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return
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me_data= me_ob.getData(mesh=1)
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for f in me_data.faces:
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if len(f) != 4:
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Draw.PupMenu("Error%t|Active mesh must have only quads")
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return
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# Get user input
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block = [\
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'Image Pixel Size',\
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("Packed Size: ", PREF_RES, 128, 2048, "Pixel width and height to render the billboard to"),\
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("Tile Size: ", PREF_TILE_RES, 64, 1024, "Pixel width and height for each tile to render to"),\
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'Render Settings',\
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("Pack Final", PREF_IMG_PACK , "Pack the image for each face into images into a single image"),\
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("Oversampling", PREF_AA , "Higher quality woth extra sampling"),\
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("Alpha Clipping", PREF_ALPHA , "Render empty areas as transparent"),\
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("Cam ZOffset: ", PREF_Z_OFFSET, 0.1, 100, "Distance to place the camera away from the quad when rendering")\
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]
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if not Draw.PupBlock("Billboard Render", block):
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return
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# Set globals
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GLOBALS['ob_sel'] = ob_sel
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GLOBALS['me_ob'] = me_ob
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GLOBALS['me_data'] = me_data
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Blender.Window.FileSelector(save_billboard, 'SAVE BILLBOARD', Blender.sys.makename(ext='.png'))
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# save_billboard('/tmp/test.png')
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if __name__=='__main__':
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main()
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