render.py

                if material.subsurface_scattering.use:
                    subsurface_scattering = material.subsurface_scattering
                    tabWrite("subsurface { translucency <%.3g, %.3g, %.3g> }\n" % (
                             (subsurface_scattering.radius[0]),
                             (subsurface_scattering.radius[1]),
                             (subsurface_scattering.radius[2]),
                             )
                            )

                if material.pov.irid_enable:
                    tabWrite("irid { %.4g thickness %.4g turbulence %.4g }" % \
                             (material.pov.irid_amount, material.pov.irid_thickness,
                              material.pov.irid_turbulence))

            else:
                tabWrite("diffuse 0.8\n")
                tabWrite("phong 70.0\n")

                #tabWrite("specular 0.2\n")

            # This is written into the object
            '''
            if material and material.transparency_method=='RAYTRACE':
                'interior { ior %.3g} ' % material.raytrace_transparency.ior
            '''

            #tabWrite("crand 1.0\n") # Sand granyness
            #tabWrite("metallic %.6f\n" % material.spec)
            #tabWrite("phong %.6f\n" % material.spec)
            #tabWrite("phong_size %.6f\n" % material.spec)
            #tabWrite("brilliance %.6f " % (material.specular_hardness/256.0) # Like hardness

            tabWrite("}\n\n")

        # Level=2 Means translation of spec and mir levels for when no map influences them
        povHasnoSpecularMaps(Level=2)

        if material:
            special_texture_found = False
            for t in material.texture_slots:
                if t and t.use:
                    if (t.texture.type == 'IMAGE' and t.texture.image) or t.texture.type != 'IMAGE':
                        validPath=True
                else:
                    validPath=False
                if(t and t.use and validPath and
                   (t.use_map_specular or t.use_map_raymir or t.use_map_normal or t.use_map_alpha)):
                    special_texture_found = True
                    continue  # Some texture found

            if special_texture_found or colored_specular_found:
                # Level=1 Means No specular nor Mirror reflection
                povHasnoSpecularMaps(Level=1)

                # Level=3 Means Maximum Spec and Mirror
                povHasnoSpecularMaps(Level=3)

    def exportCamera():
        camera = scene.camera

        # DH disabled for now, this isn't the correct context
        active_object = None  # bpy.context.active_object # does not always work  MR
        matrix = global_matrix * camera.matrix_world
        focal_point = camera.data.dof_distance

        # compute resolution
        Qsize = render.resolution_x / render.resolution_y
        tabWrite("#declare camLocation  = <%.6f, %.6f, %.6f>;\n" %
                 matrix.translation[:])
        tabWrite("#declare camLookAt = <%.6f, %.6f, %.6f>;\n" %
                 tuple([degrees(e) for e in matrix.to_3x3().to_euler()]))

        tabWrite("camera {\n")
        if scene.pov.baking_enable and active_object and active_object.type == 'MESH':
            tabWrite("mesh_camera{ 1 3\n")  # distribution 3 is what we want here
            tabWrite("mesh{%s}\n" % active_object.name)
            tabWrite("}\n")
            tabWrite("location <0,0,.01>")
            tabWrite("direction <0,0,-1>")
        # Using standard camera otherwise
        else:
            tabWrite("location  <0, 0, 0>\n")
            tabWrite("look_at  <0, 0, -1>\n")
            tabWrite("right <%s, 0, 0>\n" % - Qsize)
            tabWrite("up <0, 1, 0>\n")
            tabWrite("angle  %f\n" % (360.0 * atan(16.0 / camera.data.lens) / pi))

            tabWrite("rotate  <%.6f, %.6f, %.6f>\n" % \
                     tuple([degrees(e) for e in matrix.to_3x3().to_euler()]))
            tabWrite("translate <%.6f, %.6f, %.6f>\n" % matrix.translation[:])
            if camera.data.pov.dof_enable and focal_point != 0:
                tabWrite("aperture %.3g\n" % camera.data.pov.dof_aperture)
                tabWrite("blur_samples %d %d\n" % \
                         (camera.data.pov.dof_samples_min, camera.data.pov.dof_samples_max))
                tabWrite("variance 1/%d\n" % camera.data.pov.dof_variance)
                tabWrite("confidence %.3g\n" % camera.data.pov.dof_confidence)
                tabWrite("focal_point <0, 0, %f>\n" % focal_point)
        tabWrite("}\n")

    def exportLamps(lamps):
        # Incremented after each lamp export to declare its target
        # currently used for Fresnel diffuse shader as their slope vector:
        global lampCount
        lampCount = 0
        # Get all lamps
        for ob in lamps:
            lamp = ob.data

            matrix = global_matrix * ob.matrix_world

            # Color is modified by energy #muiltiplie by 2 for a better match --Maurice
            color = tuple([c * lamp.energy * 2.0 for c in lamp.color])

            tabWrite("light_source {\n")
            tabWrite("< 0,0,0 >\n")
            tabWrite("color rgb<%.3g, %.3g, %.3g>\n" % color)

            if lamp.type == 'POINT':
                pass
            elif lamp.type == 'SPOT':
                tabWrite("spotlight\n")

                # Falloff is the main radius from the centre line
                tabWrite("falloff %.2f\n" % (degrees(lamp.spot_size) / 2.0))  # 1 TO 179 FOR BOTH
                tabWrite("radius %.6f\n" % \
                         ((degrees(lamp.spot_size) / 2.0) * (1.0 - lamp.spot_blend)))

                # Blender does not have a tightness equivilent, 0 is most like blender default.
                tabWrite("tightness 0\n")  # 0:10f

                tabWrite("point_at  <0, 0, -1>\n")
            elif lamp.type == 'SUN':
                tabWrite("parallel\n")
                tabWrite("point_at  <0, 0, -1>\n")  # *must* be after 'parallel'

            elif lamp.type == 'AREA':
                tabWrite("area_illumination\n")
                tabWrite("fade_distance %.6f\n" % (lamp.distance / 2.0))
                # Area lights have no falloff type, so always use blenders lamp quad equivalent
                # for those?
                tabWrite("fade_power %d\n" % 2)
                size_x = lamp.size
                samples_x = lamp.shadow_ray_samples_x
                if lamp.shape == 'SQUARE':
                    size_y = size_x
                    samples_y = samples_x
                else:
                    size_y = lamp.size_y
                    samples_y = lamp.shadow_ray_samples_y

                tabWrite("area_light <%.6f,0,0>,<0,%.6f,0> %d, %d\n" % \
                         (size_x, size_y, samples_x, samples_y))
                if lamp.shadow_ray_sample_method == 'CONSTANT_JITTERED':
                    if lamp.use_jitter:
                        tabWrite("jitter\n")
                else:
                    tabWrite("adaptive 1\n")
                    tabWrite("jitter\n")

            # HEMI never has any shadow_method attribute
            if(not scene.render.use_shadows or lamp.type == 'HEMI' or
               (lamp.type != 'HEMI' and lamp.shadow_method == 'NOSHADOW')):
                tabWrite("shadowless\n")

            # Sun shouldn't be attenuated. Hemi and area lights have no falloff attribute so they
            # are put to type 2 attenuation a little higher above.
            if lamp.type not in {'SUN', 'AREA', 'HEMI'}:
                tabWrite("fade_distance %.6f\n" % (lamp.distance / 2.0))
                if lamp.falloff_type == 'INVERSE_SQUARE':
                    tabWrite("fade_power %d\n" % 2)  # Use blenders lamp quad equivalent
                elif lamp.falloff_type == 'INVERSE_LINEAR':
                    tabWrite("fade_power %d\n" % 1)  # Use blenders lamp linear
                # supposing using no fade power keyword would default to constant, no attenuation.
                elif lamp.falloff_type == 'CONSTANT':
                    pass
                # Using Custom curve for fade power 3 for now.
                elif lamp.falloff_type == 'CUSTOM_CURVE':
                    tabWrite("fade_power %d\n" % 4)

            writeMatrix(matrix)

            tabWrite("}\n")

            lampCount += 1

            # v(A,B) rotates vector A about origin by vector B.
            file.write("#declare lampTarget%s= vrotate(<%.4g,%.4g,%.4g>,<%.4g,%.4g,%.4g>);\n" % \
                       (lampCount, -(ob.location.x), -(ob.location.y), -(ob.location.z),
                        ob.rotation_euler.x, ob.rotation_euler.y, ob.rotation_euler.z))

####################################################################################################

    def exportMeta(metas):

        # TODO - blenders 'motherball' naming is not supported.

        if comments and len(metas) >= 1:
            file.write("//--Blob objects--\n\n")

        for ob in metas:
            meta = ob.data

            # important because no elements will break parsing.
            elements = [elem for elem in meta.elements if elem.type in {'BALL', 'ELLIPSOID'}]

            if elements:
                tabWrite("blob {\n")
                tabWrite("threshold %.4g\n" % meta.threshold)
                importance = ob.pov.importance_value

                try:
                    material = meta.materials[0]  # lame! - blender cant do enything else.
                except:
                    material = None

                for elem in elements:
                    loc = elem.co

                    stiffness = elem.stiffness
                    if elem.use_negative:
                        stiffness = - stiffness

                    if elem.type == 'BALL':

                        tabWrite("sphere { <%.6g, %.6g, %.6g>, %.4g, %.4g }\n" % \
                                 (loc.x, loc.y, loc.z, elem.radius, stiffness))

                        # After this wecould do something simple like...
                        #     "pigment {Blue} }"
                        # except we'll write the color

                    elif elem.type == 'ELLIPSOID':
                        # location is modified by scale
                        tabWrite("sphere { <%.6g, %.6g, %.6g>, %.4g, %.4g }\n" % \
                                 (loc.x / elem.size_x, loc.y / elem.size_y, loc.z / elem.size_z,
                                  elem.radius, stiffness))
                        tabWrite("scale <%.6g, %.6g, %.6g> \n" % \
                                 (elem.size_x, elem.size_y, elem.size_z))

                if material:
                    diffuse_color = material.diffuse_color
                    trans = 1.0 - material.alpha
                    if material.use_transparency and material.transparency_method == 'RAYTRACE':
                        povFilter = material.raytrace_transparency.filter * (1.0 - material.alpha)
                        trans = (1.0 - material.alpha) - povFilter
                    else:
                        povFilter = 0.0

                    material_finish = materialNames[material.name]

                    tabWrite("pigment {rgbft<%.3g, %.3g, %.3g, %.3g, %.3g>} \n" % \
                             (diffuse_color[0], diffuse_color[1], diffuse_color[2],
                              povFilter, trans))
                    tabWrite("finish {%s}\n" % safety(material_finish, Level=2))

                else:
                    tabWrite("pigment {rgb<1 1 1>} \n")
                    # Write the finish last.
                    tabWrite("finish {%s}\n" % (safety(DEF_MAT_NAME, Level=2)))

                writeObjectMaterial(material, ob)

                writeMatrix(global_matrix * ob.matrix_world)
                # Importance for radiosity sampling added here
                tabWrite("radiosity { \n")
                tabWrite("importance %3g \n" % importance)
                tabWrite("}\n")

                tabWrite("}\n")  # End of Metaball block

                if comments and len(metas) >= 1:
                    file.write("\n")

#    objectNames = {}
    DEF_OBJ_NAME = "Default"

    def exportMeshes(scene, sel):
#        obmatslist = []
#        def hasUniqueMaterial():
#            # Grab materials attached to object instances ...
#            if hasattr(ob, 'material_slots'):
#                for ms in ob.material_slots:
#                    if ms.material is not None and ms.link == 'OBJECT':
#                        if ms.material in obmatslist:
#                            return False
#                        else:
#                            obmatslist.append(ms.material)
#                            return True
#        def hasObjectMaterial(ob):
#            # Grab materials attached to object instances ...
#            if hasattr(ob, 'material_slots'):
#                for ms in ob.material_slots:
#                    if ms.material is not None and ms.link == 'OBJECT':
#                        # If there is at least one material slot linked to the object
#                        # and not the data (mesh), always create a new, "private" data instance.
#                        return True
#            return False
        # For objects using local material(s) only!
        # This is a mapping between a tuple (dataname, materialnames, ...), and the POV dataname.
        # As only objects using:
        #     * The same data.
        #     * EXACTLY the same materials, in EXACTLY the same sockets.
        # ... can share a same instance in POV export.
        obmats2data = {}

        def checkObjectMaterials(ob, name, dataname):
            if hasattr(ob, 'material_slots'):
                has_local_mats = False
                key = [dataname]
                for ms in ob.material_slots:
                    if ms.material is not None:
                        key.append(ms.material.name)
                        if ms.link == 'OBJECT' and not has_local_mats:
                            has_local_mats = True
                    else:
                        # Even if the slot is empty, it is important to grab it...
                        key.append("")
                if has_local_mats:
                    # If this object uses local material(s), lets find if another object
                    # using the same data and exactly the same list of materials
                    # (in the same slots) has already been processed...
                    # Note that here also, we use object name as new, unique dataname for Pov.
                    key = tuple(key)  # Lists are not hashable...
                    if key not in obmats2data:
                        obmats2data[key] = name
                    return obmats2data[key]
            return None

        data_ref = {}

        def store(scene, ob, name, dataname, matrix):
            # The Object needs to be written at least once but if its data is
            # already in data_ref this has already been done.
            # This func returns the "povray" name of the data, or None
            # if no writing is needed.
            if ob.is_modified(scene, 'RENDER'):
                # Data modified.
                # Create unique entry in data_ref by using object name
                # (always unique in Blender) as data name.
                data_ref[name] = [(name, MatrixAsPovString(matrix))]
                return name
            # Here, we replace dataname by the value returned by checkObjectMaterials, only if
            # it is not evaluated to False (i.e. only if the object uses some local material(s)).
            dataname = checkObjectMaterials(ob, name, dataname) or dataname
            if dataname in data_ref:
                # Data already known, just add the object instance.
                data_ref[dataname].append((name, MatrixAsPovString(matrix)))
                # No need to write data
                return None
            else:
                # Data not yet processed, create a new entry in data_ref.
                data_ref[dataname] = [(name, MatrixAsPovString(matrix))]
                return dataname
           
             
        def exportSmoke(smoke_obj_name):
            #if LuxManager.CurrentScene.name == 'preview':
                #return 1, 1, 1, 1.0
            #else:
            flowtype = -1
            smoke_obj = bpy.data.objects[smoke_obj_name]
            domain = None

            # Search smoke domain target for smoke modifiers
            for mod in smoke_obj.modifiers:
                if mod.name == 'Smoke':
                    if mod.smoke_type == 'FLOW':
                        if mod.flow_settings.smoke_flow_type == 'BOTH':
                            flowtype = 2
                        else:
                            if mod.flow_settings.smoke_flow_type == 'SMOKE':
                                flowtype = 0
                            else:
                                if mod.flow_settings.smoke_flow_type == 'FIRE':
                                    flowtype = 1

                    if mod.smoke_type == 'DOMAIN':
                        domain = smoke_obj
                        smoke_modifier = mod

            eps = 0.000001
            if domain is not None:
                #if bpy.app.version[0] >= 2 and bpy.app.version[1] >= 71:
                # Blender version 2.71 supports direct access to smoke data structure
                set = mod.domain_settings
                channeldata = []
                for v in set.density_grid:
                    channeldata.append(v.real)
                    print(v.real)
                ## Usage en voxel texture:
                # channeldata = []
                # if channel == 'density':
                    # for v in set.density_grid:
                        # channeldata.append(v.real)

                # if channel == 'fire':
                    # for v in set.flame_grid:
                        # channeldata.append(v.real)

                resolution = set.resolution_max
                big_res = []
                big_res.append(set.domain_resolution[0])
                big_res.append(set.domain_resolution[1])
                big_res.append(set.domain_resolution[2])

                if set.use_high_resolution:
                    big_res[0] = big_res[0] * (set.amplify + 1)
                    big_res[1] = big_res[1] * (set.amplify + 1)
                    big_res[2] = big_res[2] * (set.amplify + 1)
                # else:
                    # p = []
                    ##gather smoke domain settings
                    # BBox = domain.bound_box
                    # p.append([BBox[0][0], BBox[0][1], BBox[0][2]])
                    # p.append([BBox[6][0], BBox[6][1], BBox[6][2]])
                    # set = mod.domain_settings
                    # resolution = set.resolution_max
                    # smokecache = set.point_cache
                    # ret = read_cache(smokecache, set.use_high_resolution, set.amplify + 1, flowtype)
                    # res_x = ret[0]
                    # res_y = ret[1]
                    # res_z = ret[2]
                    # density = ret[3]
                    # fire = ret[4]

                    # if res_x * res_y * res_z > 0:
                        ##new cache format
                        # big_res = []
                        # big_res.append(res_x)
                        # big_res.append(res_y)
                        # big_res.append(res_z)
                    # else:
                        # max = domain.dimensions[0]
                        # if (max - domain.dimensions[1]) < -eps:
                            # max = domain.dimensions[1]

                        # if (max - domain.dimensions[2]) < -eps:
                            # max = domain.dimensions[2]

                        # big_res = [int(round(resolution * domain.dimensions[0] / max, 0)),
                                   # int(round(resolution * domain.dimensions[1] / max, 0)),
                                   # int(round(resolution * domain.dimensions[2] / max, 0))]

                    # if set.use_high_resolution:
                        # big_res = [big_res[0] * (set.amplify + 1), big_res[1] * (set.amplify + 1),
                                   # big_res[2] * (set.amplify + 1)]

                    # if channel == 'density':
                        # channeldata = density

                    # if channel == 'fire':
                        # channeldata = fire

                        # sc_fr = '%s/%s/%s/%05d' % (efutil.export_path, efutil.scene_filename(), bpy.context.scene.name, bpy.context.scene.frame_current)
                        #		        if not os.path.exists( sc_fr ):
                        #			        os.makedirs(sc_fr)
                        #
                        #       		smoke_filename = '%s.smoke' % bpy.path.clean_name(domain.name)
                        #	        	smoke_path = '/'.join([sc_fr, smoke_filename])
                        #
                        #		        with open(smoke_path, 'wb') as smoke_file:
                        #			        # Binary densitygrid file format
                        #			        #
                        #			        # File header
                        #	        		smoke_file.write(b'SMOKE')        #magic number
                        #		        	smoke_file.write(struct.pack('<I', big_res[0]))
                        #			        smoke_file.write(struct.pack('<I', big_res[1]))
                        #       			smoke_file.write(struct.pack('<I', big_res[2]))
                        # Density data
                        #       			smoke_file.write(struct.pack('<%df'%len(channeldata), *channeldata))
                        #
                        #	        	LuxLog('Binary SMOKE file written: %s' % (smoke_path))

        #return big_res[0], big_res[1], big_res[2], channeldata

                mydf3 = df3.df3(big_res[0],big_res[1],big_res[2])
                sim_sizeX, sim_sizeY, sim_sizeZ = mydf3.size()
                for x in range(sim_sizeX):
                    for y in range(sim_sizeY):
                        for z in range(sim_sizeZ):
                            mydf3.set(x, y, z, channeldata[((z * sim_sizeY + y) * sim_sizeX + x)])

                mydf3.exportDF3(smokePath)
                print('Binary smoke.df3 file written in preview directory')
                if comments:
                    file.write("\n//--Smoke--\n\n")

                # Note: We start with a default unit cube.
                #       This is mandatory to read correctly df3 data - otherwise we could just directly use bbox
                #       coordinates from the start, and avoid scale/translate operations at the end...
                file.write("box{<0,0,0>, <1,1,1>\n")
                file.write("    pigment{ rgbt 1 }\n")
                file.write("    hollow\n")
                file.write("    interior{ //---------------------\n")
                file.write("        media{ method 3\n")
                file.write("               emission <1,1,1>*1\n")# 0>1 for dark smoke to white vapour
                file.write("               scattering{ 1, // Type\n")
                file.write("                  <1,1,1>*0.1\n")
                file.write("                } // end scattering\n")
                file.write("                density{density_file df3 \"%s\"\n" % (smokePath))
                file.write("                        color_map {\n")
                file.write("                        [0.00 rgb 0]\n")
                file.write("                        [0.05 rgb 0]\n")
                file.write("                        [0.20 rgb 0.2]\n")
                file.write("                        [0.30 rgb 0.6]\n")
                file.write("                        [0.40 rgb 1]\n")
                file.write("                        [1.00 rgb 1]\n")
                file.write("                       } // end color_map\n")
                file.write("               } // end of density\n")
                file.write("               samples %i // higher = more precise\n" % resolution)
                file.write("         } // end of media --------------------------\n")
                file.write("    } // end of interior\n")

                # START OF TRANSFORMATIONS

                # Size to consider here are bbox dimensions (i.e. still in object space, *before* applying
                # loc/rot/scale and other transformations (like parent stuff), aka matrix_world).
                bbox = smoke_obj.bound_box
                dim = [abs(bbox[6][0] - bbox[0][0]), abs(bbox[6][1] - bbox[0][1]), abs(bbox[6][2] - bbox[0][2])]

                # We scale our cube to get its final size and shapes but still in *object* space (same as Blender's bbox).
                file.write("scale<%.6g,%.6g,%.6g>\n" % (dim[0], dim[1], dim[2]))

                # We offset our cube such that (0,0,0) coordinate matches Blender's object center.
                file.write("translate<%.6g,%.6g,%.6g>\n" % (bbox[0][0], bbox[0][1], bbox[0][2]))

                # We apply object's transformations to get final loc/rot/size in world space!
                # Note: we could combine the two previous transformations with this matrix directly...
                writeMatrix(global_matrix * smoke_obj.matrix_world)

                # END OF TRANSFORMATIONS

                file.write("}\n")

                
                #file.write("	            interpolate 1\n")
                #file.write("	            frequency 0\n")
                #file.write("	}\n")
                #file.write("}\n")                            
                
        ob_num = 0
        for ob in sel:
            ob_num += 1

            # XXX I moved all those checks here, as there is no need to compute names
            #     for object we won't export here!
            if ob.type in {'LAMP', 'CAMERA', 'EMPTY', 'META', 'ARMATURE', 'LATTICE'}:
                continue
            smokeFlag=False
            for mod in ob.modifiers:
                if mod and hasattr(mod, 'smoke_type'):
                    smokeFlag=True
                    if (mod.smoke_type == 'DOMAIN'):
                        exportSmoke(ob.name)
                    break # don't render domain mesh or flow emitter mesh, skip to next object.
            if not smokeFlag:    
                # Export Hair
                renderEmitter = True
                if hasattr(ob, 'particle_systems'):
                    renderEmitter = False
                    for pSys in ob.particle_systems:
                        if pSys.settings.use_render_emitter:
                            renderEmitter = True
                        for mod in [m for m in ob.modifiers if (m is not None) and (m.type == 'PARTICLE_SYSTEM')]:
                            if (pSys.settings.render_type == 'PATH') and mod.show_render and (pSys.name == mod.particle_system.name):
                                tstart = time.time()
                                texturedHair=0
                                if ob.active_material is not None:
                                    pmaterial = ob.material_slots[pSys.settings.material - 1].material
                                    for th in pmaterial.texture_slots:
                                        if th and th.use:
                                            if (th.texture.type == 'IMAGE' and th.texture.image) or th.texture.type != 'IMAGE':
                                                if th.use_map_color_diffuse:
                                                    texturedHair=1
                                    if pmaterial.strand.use_blender_units:
                                        strandStart = pmaterial.strand.root_size
                                        strandEnd = pmaterial.strand.tip_size
                                        strandShape = pmaterial.strand.shape 
                                    else:  # Blender unit conversion
                                        strandStart = pmaterial.strand.root_size / 200.0
                                        strandEnd = pmaterial.strand.tip_size / 200.0
                                        strandShape = pmaterial.strand.shape
                                else:
                                    pmaterial = "default"  # No material assigned in blender, use default one
                                    strandStart = 0.01
                                    strandEnd = 0.01
                                    strandShape = 0.0
                                # Set the number of particles to render count rather than 3d view display    
                                pSys.set_resolution(scene, ob, 'RENDER')    
                                steps = pSys.settings.draw_step
                                steps = 3 ** steps # or (power of 2 rather than 3) + 1 # Formerly : len(particle.hair_keys)
                                
                                totalNumberOfHairs = ( len(pSys.particles) + len(pSys.child_particles) )
                                #hairCounter = 0
                                file.write('#declare HairArray = array[%i] {\n' % totalNumberOfHairs)
                                for pindex in range(0, totalNumberOfHairs):

                                    #if particle.is_exist and particle.is_visible:
                                        #hairCounter += 1
                                        #controlPointCounter = 0
                                        # Each hair is represented as a separate sphere_sweep in POV-Ray.
                                        
                                        file.write('sphere_sweep{')
                                        if pSys.settings.use_hair_bspline:
                                            file.write('b_spline ')
                                            file.write('%i,\n' % (steps + 2))  # +2 because the first point needs tripling to be more than a handle in POV
                                        else:
                                            file.write('linear_spline ')
                                            file.write('%i,\n' % (steps))
                                        #changing world coordinates to object local coordinates by multiplying with inverted matrix    
                                        initCo = ob.matrix_world.inverted()*(pSys.co_hair(ob, pindex, 0))
                                        if ob.active_material is not None:
                                            pmaterial = ob.material_slots[pSys.settings.material-1].material
                                            for th in pmaterial.texture_slots:
                                                if th and th.use and th.use_map_color_diffuse:
                                                    #treat POV textures as bitmaps
                                                    if (th.texture.type == 'IMAGE' and th.texture.image and th.texture_coords == 'UV' and ob.data.uv_textures != None): # or (th.texture.pov.tex_pattern_type != 'emulator' and th.texture_coords == 'UV' and ob.data.uv_textures != None):
                                                        image=th.texture.image
                                                        image_width = image.size[0]
                                                        image_height = image.size[1]
                                                        image_pixels = image.pixels[:]
                                                        uv_co = pSys.uv_on_emitter(mod, pSys.particles[pindex], pindex, 0)
                                                        x_co = round(uv_co[0] * (image_width - 1))
                                                        y_co = round(uv_co[1] * (image_height - 1))
                                                        pixelnumber = (image_width * y_co) + x_co
                                                        r = image_pixels[pixelnumber*4]
                                                        g = image_pixels[pixelnumber*4+1]
                                                        b = image_pixels[pixelnumber*4+2]
                                                        a = image_pixels[pixelnumber*4+3]
                                                        initColor=(r,g,b,a)                                              
                                                    else:
                                                        #only overwrite variable for each competing texture for now
                                                        initColor=th.texture.evaluate((initCo[0],initCo[1],initCo[2]))
                                        for step in range(0, steps):
                                            co = pSys.co_hair(ob, pindex, step)
                                        #for controlPoint in particle.hair_keys:
                                            if pSys.settings.clump_factor != 0:
                                                hDiameter = pSys.settings.clump_factor / 200.0 * random.uniform(0.5, 1)
                                            elif step == 0:
                                                hDiameter = strandStart
                                            else:
                                                hDiameter += (strandEnd-strandStart)/(pSys.settings.draw_step+1) #XXX +1 or not?
                                            if step == 0 and pSys.settings.use_hair_bspline:
                                                # Write three times the first point to compensate pov Bezier handling
                                                file.write('<%.6g,%.6g,%.6g>,%.7g,\n' % (co[0], co[1], co[2], abs(hDiameter)))
                                                file.write('<%.6g,%.6g,%.6g>,%.7g,\n' % (co[0], co[1], co[2], abs(hDiameter)))                                          
                                                #file.write('<%.6g,%.6g,%.6g>,%.7g' % (particle.location[0], particle.location[1], particle.location[2], abs(hDiameter))) # Useless because particle location is the tip, not the root.
                                                #file.write(',\n')
                                            #controlPointCounter += 1
                                            #totalNumberOfHairs += len(pSys.particles)# len(particle.hair_keys)
                                                 
                                          # Each control point is written out, along with the radius of the
                                          # hair at that point.
                                            file.write('<%.6g,%.6g,%.6g>,%.7g' % (co[0], co[1], co[2], abs(hDiameter)))

                                          # All coordinates except the last need a following comma.

                                            if step != steps - 1:
                                                file.write(',\n')
                                            else:
                                                if texturedHair:
                                                    # Write pigment and alpha (between Pov and Blender alpha 0 and 1 are reversed)
                                                    file.write('\npigment{ color rgbf < %.3g, %.3g, %.3g, %.3g> }\n' %(initColor[0], initColor[1], initColor[2], 1.0-initColor[3]))
                                                # End the sphere_sweep declaration for this hair
                                                file.write('}\n')
                                            
                                          # All but the final sphere_sweep (each array element) needs a terminating comma.

                                        if pindex != totalNumberOfHairs:
                                            file.write(',\n')
                                        else:
                                            file.write('\n')

                                # End the array declaration.

                                file.write('}\n')
                                file.write('\n')
                                
                                if not texturedHair:
                                    # Pick up the hair material diffuse color and create a default POV-Ray hair texture.

                                    file.write('#ifndef (HairTexture)\n')
                                    file.write('  #declare HairTexture = texture {\n')
                                    file.write('    pigment {rgbt <%s,%s,%s,%s>}\n' % (pmaterial.diffuse_color[0], pmaterial.diffuse_color[1], pmaterial.diffuse_color[2], (pmaterial.strand.width_fade + 0.05)))
                                    file.write('  }\n')
                                    file.write('#end\n')
                                    file.write('\n')

                                # Dynamically create a union of the hairstrands (or a subset of them).
                                # By default use every hairstrand, commented line is for hand tweaking test renders.
                                file.write('//Increasing HairStep divides the amount of hair for test renders.\n')
                                file.write('#ifndef(HairStep) #declare HairStep = 1; #end\n')
                                file.write('union{\n')
                                file.write('  #local I = 0;\n')
                                file.write('  #while (I < %i)\n' % totalNumberOfHairs)
                                file.write('    object {HairArray[I]')
                                if not texturedHair:
                                    file.write(' texture{HairTexture}\n')
                                else:
                                    file.write('\n')
                                # Translucency of the hair:
                                file.write('        hollow\n')
                                file.write('        double_illuminate\n')
                                file.write('        interior {\n')
                                file.write('            ior 1.45\n')
                                file.write('            media {\n')
                                file.write('                scattering { 1, 10*<0.73, 0.35, 0.15> /*extinction 0*/ }\n')
                                file.write('                absorption 10/<0.83, 0.75, 0.15>\n')
                                file.write('                samples 1\n')
                                file.write('                method 2\n')
                                file.write('                density {\n')
                                file.write('                    color_map {\n')
                                file.write('                        [0.0 rgb <0.83, 0.45, 0.35>]\n')
                                file.write('                        [0.5 rgb <0.8, 0.8, 0.4>]\n')
                                file.write('                        [1.0 rgb <1,1,1>]\n')
                                file.write('                    }\n')
                                file.write('                }\n')
                                file.write('            }\n')
                                file.write('        }\n')
                                file.write('    }\n')
                                
                                file.write('    #local I = I + HairStep;\n')
                                file.write('  #end\n')
                                
                                writeMatrix(global_matrix * ob.matrix_world)

                                
                                file.write('}')
                                print('Totals hairstrands written: %i' % totalNumberOfHairs)
                                print('Number of tufts (particle systems)', len(ob.particle_systems))
                                
                                # Set back the displayed number of particles to preview count
                                pSys.set_resolution(scene, ob, 'PREVIEW')
                                
                                if renderEmitter == False:
                                    continue #don't render mesh, skip to next object.
                try:
                    me = ob.to_mesh(scene, True, 'RENDER')
                except:
                    # happens when curves cant be made into meshes because of no-data
                    continue

                importance = ob.pov.importance_value
                me_materials = me.materials
                me_faces = me.tessfaces[:]
                
                if not me or not me_faces:
                    continue

    #############################################
                # Generating a name for object just like materials to be able to use it
                # (baking for now or anything else).
                # XXX I don't understand that:&nbsp;if we are here, sel if a non-empty iterable,
                #     so this condition is always True, IMO -- mont29
                if sel:
                    name_orig = "OB" + ob.name
                    dataname_orig = "DATA" + ob.data.name
                else:
                    name_orig = DEF_OBJ_NAME
                    dataname_orig = DEF_OBJ_NAME
                name = string_strip_hyphen(bpy.path.clean_name(name_orig))
                dataname = string_strip_hyphen(bpy.path.clean_name(dataname_orig))
    ##            for slot in ob.material_slots:
    ##                if slot.material is not None and slot.link == 'OBJECT':
    ##                    obmaterial = slot.material

    #############################################

                if info_callback:
                    info_callback("Object %2.d of %2.d (%s)" % (ob_num, len(sel), ob.name))

                #if ob.type != 'MESH':
                #    continue
                # me = ob.data

                matrix = global_matrix * ob.matrix_world
                povdataname = store(scene, ob, name, dataname, matrix)
                if povdataname is None:
                    print("This is an instance")
                    continue

                print("Writing Down First Occurence")

                uv_textures = me.tessface_uv_textures
                if len(uv_textures) > 0:
                    if me.uv_textures.active and uv_textures.active.data:
                        uv_layer = uv_textures.active.data
                else:
                    uv_layer = None

                try:
                    #vcol_layer = me.vertex_colors.active.data
                    vcol_layer = me.tessface_vertex_colors.active.data
                except AttributeError:
                    vcol_layer = None

                faces_verts = [f.vertices[:] for f in me_faces]
                faces_normals = [f.normal[:] for f in me_faces]
                verts_normals = [v.normal[:] for v in me.vertices]

                # quads incur an extra face
                quadCount = sum(1 for f in faces_verts if len(f) == 4)

                # Use named declaration to allow reference e.g. for baking. MR
                file.write("\n")
                tabWrite("#declare %s =\n" % povdataname)
                tabWrite("mesh2 {\n")
                tabWrite("vertex_vectors {\n")
                tabWrite("%d" % len(me.vertices))  # vert count

                tabStr = tab * tabLevel
                for v in me.vertices:
                    if linebreaksinlists:
                        file.write(",\n")
                        file.write(tabStr + "<%.6f, %.6f, %.6f>" % v.co[:])  # vert count
                    else:
                        file.write(", ")
                        file.write("<%.6f, %.6f, %.6f>" % v.co[:])  # vert count
                    #tabWrite("<%.6f, %.6f, %.6f>" % v.co[:])  # vert count
                file.write("\n")
                tabWrite("}\n")

                # Build unique Normal list
                uniqueNormals = {}
                for fi, f in enumerate(me_faces):
                    fv = faces_verts[fi]
                    # [-1] is a dummy index, use a list so we can modify in place
                    if f.use_smooth:  # Use vertex normals
                        for v in fv:
                            key = verts_normals[v]
                            uniqueNormals[key] = [-1]
                    else:  # Use face normal
                        key = faces_normals[fi]
                        uniqueNormals[key] = [-1]

                tabWrite("normal_vectors {\n")
                tabWrite("%d" % len(uniqueNormals))  # vert count
                idx = 0
                tabStr = tab * tabLevel
                for no, index in uniqueNormals.items():
                    if linebreaksinlists:
                        file.write(",\n")
                        file.write(tabStr + "<%.6f, %.6f, %.6f>" % no)  # vert count
                    else:
                        file.write(", ")
                        file.write("<%.6f, %.6f, %.6f>" % no)  # vert count
                    index[0] = idx
                    idx += 1
                file.write("\n")
                tabWrite("}\n")

                # Vertex colors
                vertCols = {}  # Use for material colors also.

                if uv_layer:
                    # Generate unique UV's
                    uniqueUVs = {}
                    #n = 0
                    for fi, uv in enumerate(uv_layer):

                        if len(faces_verts[fi]) == 4:
                            uvs = uv_layer[fi].uv[0], uv_layer[fi].uv[1], uv_layer[fi].uv[2], uv_layer[fi].uv[3]
                        else:
                            uvs = uv_layer[fi].uv[0], uv_layer[fi].uv[1], uv_layer[fi].uv[2]

                        for uv in uvs:
                            uniqueUVs[uv[:]] = [-1]

                    tabWrite("uv_vectors {\n")
                    #print unique_uvs
                    tabWrite("%d" % len(uniqueUVs))  # vert count
                    idx = 0
                    tabStr = tab * tabLevel
                    for uv, index in uniqueUVs.items():
                        if linebreaksinlists:
                            file.write(",\n")
                            file.write(tabStr + "<%.6f, %.6f>" % uv)
                        else:
                            file.write(", ")
                            file.write("<%.6f, %.6f>" % uv)
                        index[0] = idx
                        idx += 1
                    '''
                    else:
                        # Just add 1 dummy vector, no real UV's
                        tabWrite('1') # vert count
                        file.write(',\n\t\t<0.0, 0.0>')
                    '''
                    file.write("\n")
                    tabWrite("}\n")

                if me.vertex_colors:
                    #Write down vertex colors as a texture for each vertex
                    tabWrite("texture_list {\n")
                    tabWrite("%d\n" % (((len(me_faces)-quadCount) * 3 )+ quadCount * 4)) # works only with tris and quad mesh for now
                    VcolIdx=0
                    if comments:
                        file.write("\n  //Vertex colors: one simple pigment texture per vertex\n")
                    for fi, f in enumerate(me_faces):
                        # annoying, index may be invalid
                        material_index = f.material_index
                        try:
                            material = me_materials[material_index]
                        except:
                            material = None
                        if material: #and material.use_vertex_color_paint: #Always use vertex color when there is some for now
                         
                            col = vcol_layer[fi]

                            if len(faces_verts[fi]) == 4:
                                cols = col.color1, col.color2, col.color3, col.color4
                            else:
                                cols = col.color1, col.color2, col.color3

                            for col in cols:
                                key = col[0], col[1], col[2], material_index  # Material index!
                                VcolIdx+=1
                                vertCols[key] = [VcolIdx]
                                if linebreaksinlists:
                                    tabWrite("texture {pigment{ color rgb <%6f,%6f,%6f> }}\n" % (col[0], col[1], col[2]))
                                else:
                                    tabWrite("texture {pigment{ color rgb <%6f,%6f,%6f> }}" % (col[0], col[1], col[2]))
                                    tabStr = tab * tabLevel
                        else:
                            if material:
                                # Multiply diffuse with SSS Color
                                if material.subsurface_scattering.use:
                                    diffuse_color = [i * j for i, j in zip(material.subsurface_scattering.color[:], material.diffuse_color[:])]
                                    key = diffuse_color[0], diffuse_color[1], diffuse_color[2], \
                                          material_index
                                    vertCols[key] = [-1]
                                else:
                                    diffuse_color = material.diffuse_color[:]
                                    key = diffuse_color[0], diffuse_color[1], diffuse_color[2], \
                                          material_index
                                    vertCols[key] = [-1]

                    tabWrite("\n}\n")                
                    # Face indices
                    tabWrite("\nface_indices {\n")
                    tabWrite("%d" % (len(me_faces) + quadCount))  # faces count
                    tabStr = tab * tabLevel

                    for fi, f in enumerate(me_faces):
                        fv = faces_verts[fi]
                        material_index = f.material_index
                        if len(fv) == 4:
                            indices = (0, 1, 2), (0, 2, 3)
                        else:
                            indices = ((0, 1, 2),)

                        if vcol_layer:
                            col = vcol_layer[fi]

                            if len(fv) == 4:
                                cols = col.color1, col.color2, col.color3, col.color4
                            else:
                                cols = col.color1, col.color2, col.color3

                        if not me_materials or me_materials[material_index] is None:  # No materials
                            for i1, i2, i3 in indices:
                                if linebreaksinlists:
                                    file.write(",\n")
                                    # vert count
                                    file.write(tabStr + "<%d,%d,%d>" % (fv[i1], fv[i2], fv[i3]))
                                else:
                                    file.write(", ")
                                    file.write("<%d,%d,%d>" % (fv[i1], fv[i2], fv[i3]))  # vert count
                        else:
                            material = me_materials[material_index]
                            for i1, i2, i3 in indices:
                                if me.vertex_colors: #and material.use_vertex_color_paint:
                                    # Color per vertex - vertex color

                                    col1 = cols[i1]
                                    col2 = cols[i2]
                                    col3 = cols[i3]

                                    ci1 = vertCols[col1[0], col1[1], col1[2], material_index][0]
                                    ci2 = vertCols[col2[0], col2[1], col2[2], material_index][0]
                                    ci3 = vertCols[col3[0], col3[1], col3[2], material_index][0]
                                else:
                                    # Color per material - flat material color
                                    if material.subsurface_scattering.use:
                                        diffuse_color = [i * j for i, j in zip(material.subsurface_scattering.color[:], material.diffuse_color[:])]
                                    else:
                                        diffuse_color = material.diffuse_color[:]
                                    ci1 = ci2 = ci3 = vertCols[diffuse_color[0], diffuse_color[1], \
                                                      diffuse_color[2], f.material_index][0]
                                    # ci are zero based index so we'll subtract 1 from them
                                if linebreaksinlists:
                                    file.write(",\n")
                                    file.write(tabStr + "<%d,%d,%d>, %d,%d,%d" % \
                                               (fv[i1], fv[i2], fv[i3], ci1-1, ci2-1, ci3-1))  # vert count 
                                else:
                                    file.write(", ")
                                    file.write("<%d,%d,%d>, %d,%d,%d" % \
                                               (fv[i1], fv[i2], fv[i3], ci1-1, ci2-1, ci3-1))  # vert count

                    file.write("\n")