path: root/render_povray/primitives.py

############ To get POV-Ray specific objects In and Out of Blender ###########

import bpy
#from . import render
#from render import POVRAY_RENDER
from bpy_extras.io_utils import ImportHelper
from bpy_extras import object_utils
from math import atan, pi, degrees, sqrt, cos, sin


from bpy.props import (
        StringProperty,
        BoolProperty,
        IntProperty,
        FloatProperty,
        FloatVectorProperty,
        EnumProperty,
        PointerProperty,
        CollectionProperty,
        )


def pov_define_mesh(mesh, verts, edges, faces, name, hide_geometry=True):
    if mesh is None:
        mesh = bpy.data.meshes.new(name)
    mesh.from_pydata(verts, edges, faces)
    mesh.update()
    mesh.validate(False)  # Set it to True to see debug messages (helps ensure you generate valid geometry).
    if hide_geometry:
        mesh.vertices.foreach_set("hide", [True] * len(mesh.vertices))
        mesh.edges.foreach_set("hide", [True] * len(mesh.edges))
        mesh.polygons.foreach_set("hide", [True] * len(mesh.polygons))
    return mesh


class POVRAY_OT_lathe_add(bpy.types.Operator):
    bl_idname = "pov.addlathe"
    bl_label = "Lathe"
    bl_options = {'REGISTER','UNDO'}
    bl_description = "adds lathe"


    def execute(self, context):
        layers=[False]*20
        layers[0]=True
        bpy.ops.curve.primitive_bezier_curve_add(location=(0, 0, 0),
            rotation=(0, 0, 0), layers=layers)
        ob=context.scene.objects.active
        ob.name = ob.data.name = "PovLathe"
        ob.pov.object_as='LATHE' 
        bpy.ops.object.mode_set(mode='EDIT')
        self.report({'WARNING'}, "This native POV-Ray primitive "
                                 "won't have any vertex to show in edit mode")
        bpy.ops.transform.rotate(value=-pi/2, axis=(0, 0, 1))
        bpy.ops.object.mode_set(mode='OBJECT')
        ob.pov.curveshape = "lathe"
        bpy.ops.object.modifier_add(type='SCREW')
        bpy.context.object.modifiers["Screw"].axis = 'Y'
        bpy.context.object.modifiers["Screw"].show_render = False
        return {'FINISHED'}


        
def pov_superellipsoid_define(context, op, ob):

        if op:
            mesh = None

            u = op.se_u
            v = op.se_v
            n1 = op.se_n1
            n2 = op.se_n2
            edit = op.se_edit
            se_param1 = n2 # op.se_param1
            se_param2 = n1 # op.se_param2
            
        else:
            assert(ob)
            mesh = ob.data

            u = ob.pov.se_u
            v = ob.pov.se_v
            n1 = ob.pov.se_n1
            n2 = ob.pov.se_n2
            edit = ob.pov.se_edit
            se_param1 = ob.pov.se_param1
            se_param2 = ob.pov.se_param2
            
        verts = []
        r=1
        
        stepSegment=360/v*pi/180
        stepRing=pi/u
        angSegment=0
        angRing=-pi/2

        step=0
        for ring in range(0,u-1):
            angRing += stepRing
            for segment in range(0,v):
                step += 1
                angSegment += stepSegment
                x = r*(abs(cos(angRing))**n1)*(abs(cos(angSegment))**n2)
                if (cos(angRing) < 0 and cos(angSegment) > 0) or \
                        (cos(angRing) > 0 and cos(angSegment) < 0):
                    x = -x
                y = r*(abs(cos(angRing))**n1)*(abs(sin(angSegment))**n2)
                if (cos(angRing) < 0 and sin(angSegment) > 0) or \
                        (cos(angRing) > 0 and sin(angSegment) < 0):
                    y = -y
                z = r*(abs(sin(angRing))**n1)
                if sin(angRing) < 0:
                    z = -z
                x = round(x,4)
                y = round(y,4)
                z = round(z,4)
                verts.append((x,y,z))
        if edit == 'TRIANGLES':
            verts.append((0,0,1))
            verts.append((0,0,-1))
            
        faces = []
        
        for i in range(0,u-2):
            m=i*v
            for p in range(0,v):
                if p < v-1:
                    face=(m+p,1+m+p,v+1+m+p,v+m+p)
                if p == v-1:
                    face=(m+p,m,v+m,v+m+p)
                faces.append(face)
        if edit == 'TRIANGLES':
            indexUp=len(verts)-2
            indexDown=len(verts)-1
            indexStartDown=len(verts)-2-v
            for i in range(0,v):
                if i < v-1:
                    face=(indexDown,i,i+1)
                    faces.append(face)
                if i == v-1:
                    face=(indexDown,i,0)
                    faces.append(face)
            for i in range(0,v):
                if i < v-1:
                    face=(indexUp,i+indexStartDown,i+indexStartDown+1)
                    faces.append(face)
                if i == v-1:
                    face=(indexUp,i+indexStartDown,indexStartDown)
                    faces.append(face)
        if edit == 'NGONS':
            face=[]
            for i in range(0,v):
                face.append(i)
            faces.append(face)
            face=[]
            indexUp=len(verts)-1
            for i in range(0,v):
                face.append(indexUp-i)
            faces.append(face)
        mesh = pov_define_mesh(mesh, verts, [], faces, "SuperEllipsoid")

        if not ob:
            ob_base = object_utils.object_data_add(context, mesh, operator=None)
            ob = ob_base.object
            #engine = context.scene.render.engine what for?
            ob = context.object
            ob.name =  ob.data.name = "PovSuperellipsoid"
            ob.pov.object_as = 'SUPERELLIPSOID'
            ob.pov.se_param1 = n2
            ob.pov.se_param2 = n1
            
            ob.pov.se_u = u
            ob.pov.se_v = v
            ob.pov.se_n1 = n1 
            ob.pov.se_n2 = n2
            ob.pov.se_edit = edit        

            bpy.ops.object.mode_set(mode="EDIT")
            bpy.ops.mesh.hide(unselected=False)
            bpy.ops.object.mode_set(mode="OBJECT")
            
class POVRAY_OT_superellipsoid_add(bpy.types.Operator):
    bl_idname = "pov.addsuperellipsoid"
    bl_label = "Add SuperEllipsoid"
    bl_description = "Create a SuperEllipsoid"
    bl_options = {'REGISTER', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}

    # XXX Keep it in sync with __init__'s RenderPovSettingsConePrimitive
    #     If someone knows how to define operators' props from a func, I'd be delighted to learn it!
    se_param1 = FloatProperty(
            name="Parameter 1",
            description="",
            min=0.00, max=10.0, default=0.04)

    se_param2 = FloatProperty(
            name="Parameter 2",
            description="",
            min=0.00, max=10.0, default=0.04)
            
    se_u = IntProperty(name = "U-segments",
                    description = "radial segmentation",
                    default = 20, min = 4, max = 265)
    se_v = IntProperty(name = "V-segments",
                    description = "lateral segmentation",
                    default = 20, min = 4, max = 265)
    se_n1 = FloatProperty(name = "Ring manipulator",
                      description = "Manipulates the shape of the Ring",
                      default = 1.0, min = 0.01, max = 100.0)
    se_n2 = FloatProperty(name = "Cross manipulator",
                      description = "Manipulates the shape of the cross-section",
                      default = 1.0, min = 0.01, max = 100.0)
    se_edit = EnumProperty(items=[("NOTHING", "Nothing", ""),
                                ("NGONS", "N-Gons", ""),
                                ("TRIANGLES", "Triangles", "")],
                        name="Fill up and down",
                        description="",
                        default='TRIANGLES')

    @classmethod
    def poll(cls, context):
        engine = context.scene.render.engine
        return (engine in cls.COMPAT_ENGINES)
        
    def execute(self,context):
        pov_superellipsoid_define(context, self, None)

        self.report({'WARNING'}, "This native POV-Ray primitive won't have any vertex to show in edit mode")   

        return {'FINISHED'}

class POVRAY_OT_superellipsoid_update(bpy.types.Operator):
    bl_idname = "pov.superellipsoid_update"
    bl_label = "Update"
    bl_description = "Update Superellipsoid"
    bl_options = {'REGISTER', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}

    @classmethod
    def poll(cls, context):
        engine = context.scene.render.engine
        ob = context.object
        return (ob and ob.data and ob.type == 'MESH' and engine in cls.COMPAT_ENGINES)

    def execute(self, context):
        bpy.ops.object.mode_set(mode="EDIT")
        bpy.ops.mesh.reveal()
        bpy.ops.mesh.select_all(action='SELECT')
        bpy.ops.mesh.delete(type='VERT')
        bpy.ops.object.mode_set(mode="OBJECT")

        pov_superellipsoid_define(context, None, context.object)

        return {'FINISHED'}

def createFaces(vertIdx1, vertIdx2, closed=False, flipped=False):
    faces = []
    if not vertIdx1 or not vertIdx2:
        return None
    if len(vertIdx1) < 2 and len(vertIdx2) < 2:
        return None
    fan = False
    if (len(vertIdx1) != len(vertIdx2)):
        if (len(vertIdx1) == 1 and len(vertIdx2) > 1):
            fan = True
        else:
            return None
    total = len(vertIdx2)
    if closed:
        if flipped:
            face = [
                vertIdx1[0],
                vertIdx2[0],
                vertIdx2[total - 1]]
            if not fan:
                face.append(vertIdx1[total - 1])
            faces.append(face)

        else:
            face = [vertIdx2[0], vertIdx1[0]]
            if not fan:
                face.append(vertIdx1[total - 1])
            face.append(vertIdx2[total - 1])
            faces.append(face)
    for num in range(total - 1):
        if flipped:
            if fan:
                face = [vertIdx2[num], vertIdx1[0], vertIdx2[num + 1]]
            else:
                face = [vertIdx2[num], vertIdx1[num],
                    vertIdx1[num + 1], vertIdx2[num + 1]]
            faces.append(face)
        else:
            if fan:
                face = [vertIdx1[0], vertIdx2[num], vertIdx2[num + 1]]
            else:
                face = [vertIdx1[num], vertIdx2[num],
                    vertIdx2[num + 1], vertIdx1[num + 1]]
            faces.append(face)

    return faces

def power(a,b):
    if a < 0:
        return -((-a)**b)
    return a**b
    
def supertoroid(R,r,u,v,n1,n2):
    a = 2*pi/u
    b = 2*pi/v
    verts = []
    faces = []
    for i in range(u):
        s = power(sin(i*a),n1)
        c = power(cos(i*a),n1)
        for j in range(v):
            c2 = R+r*power(cos(j*b),n2)
            s2 = r*power(sin(j*b),n2)
            verts.append((c*c2,s*c2,s2))# type as a (mathutils.Vector(c*c2,s*c2,s2))?
        if i > 0:
            f = createFaces(range((i-1)*v,i*v),range(i*v,(i+1)*v),closed = True)
            faces.extend(f)
    f = createFaces(range((u-1)*v,u*v),range(v),closed=True)
    faces.extend(f)
    return verts, faces

def pov_supertorus_define(context, op, ob):    
        if op:
            mesh = None
            st_R = op.st_R
            st_r = op.st_r
            st_u = op.st_u
            st_v = op.st_v
            st_n1 = op.st_n1
            st_n2 = op.st_n2
            st_ie = op.st_ie
            st_edit = op.st_edit

        else:
            assert(ob)
            mesh = ob.data
            st_R = ob.pov.st_major_radius
            st_r = ob.pov.st_minor_radius
            st_u = ob.pov.st_u
            st_v = ob.pov.st_v
            st_n1 = ob.pov.st_ring
            st_n2 = ob.pov.st_cross
            st_ie = ob.pov.st_ie
            st_edit = ob.pov.st_edit
            
        if st_ie:
            rad1 = (st_R+st_r)/2
            rad2 = (st_R-st_r)/2
            if rad2 > rad1:
                [rad1,rad2] = [rad2,rad1]
        else:
            rad1 = st_R
            rad2 = st_r
            if rad2 > rad1:
                rad1 = rad2
        verts,faces = supertoroid(rad1,
                                  rad2,
                                  st_u,
                                  st_v,
                                  st_n1,
                                  st_n2)
        mesh = pov_define_mesh(mesh, verts, [], faces, "PovSuperTorus", True)
        if not ob:
            ob_base = object_utils.object_data_add(context, mesh, operator=None)

            ob = ob_base.object
            ob.pov.object_as = 'SUPERTORUS'
            ob.pov.st_major_radius = st_R
            ob.pov.st_minor_radius = st_r
            ob.pov.st_u = st_u
            ob.pov.st_v = st_v
            ob.pov.st_ring = st_n1
            ob.pov.st_cross = st_n2
            ob.pov.st_ie = st_ie
            ob.pov.st_edit = st_edit
            
class POVRAY_OT_supertorus_add(bpy.types.Operator):
    bl_idname = "pov.addsupertorus"
    bl_label = "Add Supertorus"
    bl_description = "Create a SuperTorus"
    bl_options = {'REGISTER', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}    
    
    st_R = FloatProperty(name = "big radius",
                      description = "The radius inside the tube",
                      default = 1.0, min = 0.01, max = 100.0)
    st_r = FloatProperty(name = "small radius",
                      description = "The radius of the tube",
                      default = 0.3, min = 0.01, max = 100.0)
    st_u = IntProperty(name = "U-segments",
                    description = "radial segmentation",
                    default = 16, min = 3, max = 265)
    st_v = IntProperty(name = "V-segments",
                    description = "lateral segmentation",
                    default = 8, min = 3, max = 265)
    st_n1 = FloatProperty(name = "Ring manipulator",
                      description = "Manipulates the shape of the Ring",
                      default = 1.0, min = 0.01, max = 100.0)
    st_n2 = FloatProperty(name = "Cross manipulator",
                      description = "Manipulates the shape of the cross-section",
                      default = 1.0, min = 0.01, max = 100.0)
    st_ie = BoolProperty(name = "Use Int.+Ext. radii",
                      description = "Use internal and external radii",
                      default = False)
    st_edit = BoolProperty(name="",
                        description="",
                        default=False,
                        options={'HIDDEN'})    

    @classmethod
    def poll(cls, context):
        engine = context.scene.render.engine
        return (engine in cls.COMPAT_ENGINES)

    def execute(self, context):
        pov_supertorus_define(context, self, None)

        self.report({'WARNING'}, "This native POV-Ray primitive won't have any vertex to show in edit mode")        
        return {'FINISHED'}                        

class POVRAY_OT_supertorus_update(bpy.types.Operator):
    bl_idname = "pov.supertorus_update"
    bl_label = "Update"
    bl_description = "Update SuperTorus"
    bl_options = {'REGISTER', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}

    @classmethod
    def poll(cls, context):
        engine = context.scene.render.engine
        ob = context.object
        return (ob and ob.data and ob.type == 'MESH' and engine in cls.COMPAT_ENGINES)

    def execute(self, context):
        bpy.ops.object.mode_set(mode="EDIT")
        bpy.ops.mesh.reveal()
        bpy.ops.mesh.select_all(action='SELECT')
        bpy.ops.mesh.delete(type='VERT')
        bpy.ops.object.mode_set(mode="OBJECT")

        pov_supertorus_define(context, None, context.object)

        return {'FINISHED'}
#########################################################################################################
class POVRAY_OT_loft_add(bpy.types.Operator):
    bl_idname = "pov.addloft"
    bl_label = "Add Loft Data"
    bl_description = "Create a Curve data for Meshmaker"
    bl_options = {'REGISTER', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}
    
    loft_n = IntProperty(name = "Segments",
                    description = "Vertical segments",
                    default = 16, min = 3, max = 720)
    loft_rings_bottom = IntProperty(name = "Bottom",
                    description = "Bottom rings",
                    default = 5, min = 2, max = 100)
    loft_rings_side = IntProperty(name = "Side",
                    description = "Side rings",
                    default = 10, min = 2, max = 100)
    loft_thick = FloatProperty(name = "Thickness",
                      description = "Manipulates the shape of the Ring",
                      default = 0.3, min = 0.01, max = 1.0)
    loft_r = FloatProperty(name = "Radius",
                      description = "Radius",
                      default = 1, min = 0.01, max = 10)
    loft_height = FloatProperty(name = "Height",
                      description = "Manipulates the shape of the Ring",
                      default = 2, min = 0.01, max = 10.0)

    def execute(self,context):
        
        props = self.properties
        loftData = bpy.data.curves.new('Loft', type='CURVE')
        loftData.dimensions = '3D'
        loftData.resolution_u = 2
        loftData.show_normal_face = False
        n=props.loft_n
        thick = props.loft_thick
        side = props.loft_rings_side
        bottom = props.loft_rings_bottom
        h = props.loft_height
        r = props.loft_r
        distB = r/bottom
        r0 = 0.00001
        z = -h/2
        print("New")
        for i in range(bottom+1):
            coords = []
            angle = 0
            for p in range(n):
                x = r0*cos(angle)
                y = r0*sin(angle)
                coords.append((x,y,z))
                angle+=pi*2/n
            r0+=distB
            nurbs = loftData.splines.new('NURBS')
            nurbs.points.add(len(coords)-1)
            for i, coord in enumerate(coords):
                x,y,z = coord
                nurbs.points[i].co = (x, y, z, 1)
            nurbs.use_cyclic_u = True
        for i in range(side):
            z+=h/side
            coords = []
            angle = 0
            for p in range(n):
                x = r*cos(angle)
                y = r*sin(angle)
                coords.append((x,y,z))
                angle+=pi*2/n
            nurbs = loftData.splines.new('NURBS')
            nurbs.points.add(len(coords)-1)
            for i, coord in enumerate(coords):
                x,y,z = coord
                nurbs.points[i].co = (x, y, z, 1)
            nurbs.use_cyclic_u = True
        r-=thick
        for i in range(side):
            coords = []
            angle = 0
            for p in range(n):
                x = r*cos(angle)
                y = r*sin(angle)
                coords.append((x,y,z))
                angle+=pi*2/n
            nurbs = loftData.splines.new('NURBS')
            nurbs.points.add(len(coords)-1)
            for i, coord in enumerate(coords):
                x,y,z = coord
                nurbs.points[i].co = (x, y, z, 1)
            nurbs.use_cyclic_u = True
            z-=h/side
        z = (-h/2) + thick
        distB = (r-0.00001)/bottom
        for i in range(bottom+1):
            coords = []
            angle = 0
            for p in range(n):
                x = r*cos(angle)
                y = r*sin(angle)
                coords.append((x,y,z))
                angle+=pi*2/n
            r-=distB
            nurbs = loftData.splines.new('NURBS')
            nurbs.points.add(len(coords)-1)
            for i, coord in enumerate(coords):
                x,y,z = coord
                nurbs.points[i].co = (x, y, z, 1)
            nurbs.use_cyclic_u = True
        ob = bpy.data.objects.new('Loft_shape', loftData)
        scn = bpy.context.scene
        scn.objects.link(ob)
        scn.objects.active = ob
        ob.select = True
        ob.pov.curveshape = "loft"
        return {'FINISHED'}

class POVRAY_OT_plane_add(bpy.types.Operator):
    bl_idname = "pov.addplane"
    bl_label = "Plane"
    bl_description = "Add Plane"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self,context):
        layers = 20*[False]
        layers[0] = True
        bpy.ops.mesh.primitive_plane_add(radius = 100000,layers=layers)
        ob = context.object
        ob.name = ob.data.name = 'PovInfinitePlane'
        bpy.ops.object.mode_set(mode="EDIT")
        self.report({'WARNING'}, "This native POV-Ray primitive "
                                 "won't have any vertex to show in edit mode")
        bpy.ops.mesh.hide(unselected=False)
        bpy.ops.object.mode_set(mode="OBJECT")
        bpy.ops.object.shade_smooth()
        ob.pov.object_as = "PLANE"
        return {'FINISHED'}
        
class POVRAY_OT_box_add(bpy.types.Operator):
    bl_idname = "pov.addbox"
    bl_label = "Box"
    bl_description = "Add Box"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self,context):
        layers = 20*[False]
        layers[0] = True
        bpy.ops.mesh.primitive_cube_add(layers=layers)
        ob = context.object
        ob.name = ob.data.name = 'PovBox'
        bpy.ops.object.mode_set(mode="EDIT")
        self.report({'WARNING'}, "This native POV-Ray primitive "
                                 "won't have any vertex to show in edit mode")
        bpy.ops.mesh.hide(unselected=False)
        bpy.ops.object.mode_set(mode="OBJECT")
        ob.pov.object_as = "BOX"
        return {'FINISHED'}

class POVRAY_OT_cylinder_add(bpy.types.Operator):
    bl_idname = "pov.addcylinder"
    bl_label = "Cylinder"
    bl_description = "Add Cylinder"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self,context):
        layers = 20*[False]
        layers[0] = True
        bpy.ops.mesh.primitive_cylinder_add(layers = layers)
        ob = context.object
        ob.name = ob.data.name = 'PovCylinder'
        bpy.ops.object.mode_set(mode="EDIT")
        self.report({'WARNING'}, "This native POV-Ray primitive "
                                 "won't have any vertex to show in edit mode")
        bpy.ops.mesh.hide(unselected=False)
        bpy.ops.object.mode_set(mode="OBJECT")
        ob.pov.object_as = "CYLINDER"

        return {'FINISHED'}
################################SPHERE##########################################
def pov_sphere_define(context, op, ob, loc):
        if op:
            R = op.R

        else:
            assert(ob)
            R = ob.pov.sphere_radius

            #keep object rotation and location for the add object operator
            obrot = ob.rotation_euler
            #obloc = ob.location
            obscale = ob.scale
            
            bpy.ops.object.mode_set(mode="EDIT")
            bpy.ops.mesh.reveal()
            bpy.ops.mesh.select_all(action='SELECT')
            bpy.ops.mesh.delete(type='VERT')
            bpy.ops.mesh.primitive_ico_sphere_add(subdivisions=4, size=ob.pov.sphere_radius, location=loc, rotation=obrot)
            #bpy.ops.transform.rotate(axis=obrot,constraint_orientation='GLOBAL')
            bpy.ops.transform.resize(value=obscale)
            #bpy.ops.transform.rotate(axis=obrot, proportional_size=1)
            
            
            bpy.ops.mesh.hide(unselected=False)
            bpy.ops.object.mode_set(mode="OBJECT")
            #bpy.ops.transform.rotate(axis=obrot,constraint_orientation='GLOBAL')

        if not ob:
            bpy.ops.mesh.primitive_ico_sphere_add(subdivisions=4, size=R, location=loc)
            ob = context.object
            ob.name =  ob.data.name = "PovSphere"
            ob.pov.object_as = "SPHERE"
            ob.pov.sphere_radius = R
            bpy.ops.object.mode_set(mode="EDIT")
            bpy.ops.mesh.hide(unselected=False)
            bpy.ops.object.mode_set(mode="OBJECT")
class POVRAY_OT_sphere_add(bpy.types.Operator):
    bl_idname = "pov.addsphere"
    bl_label = "Sphere"
    bl_description = "Add Sphere Shape"
    bl_options = {'REGISTER', 'UNDO'}

    # XXX Keep it in sync with __init__'s torus Primitive
    R = FloatProperty(name="Sphere radius",min=0.00, max=10.0, default=0.5) 
    
    imported_loc = FloatVectorProperty(
        name="Imported Pov location",
        precision=6, 
        default=(0.0, 0.0, 0.0))
    
    def execute(self,context):
        props = self.properties
        R = props.R
        ob = context.object
        if ob:
            if ob.pov.imported_loc:
                LOC = ob.pov.imported_loc
        else:
            LOC = bpy.context.scene.cursor_location
        pov_sphere_define(context, self, None, LOC)
        self.report({'WARNING'}, "This native POV-Ray primitive "
                                 "won't have any vertex to show in edit mode")
        return {'FINISHED'}
        
    # def execute(self,context):
        # layers = 20*[False]
        # layers[0] = True

        # bpy.ops.mesh.primitive_ico_sphere_add(subdivisions=4, radius=ob.pov.sphere_radius, layers=layers)
        # ob = context.object
        # bpy.ops.object.mode_set(mode="EDIT")
        # self.report({'WARNING'}, "This native POV-Ray primitive "
                                 # "won't have any vertex to show in edit mode")
        # bpy.ops.mesh.hide(unselected=False)
        # bpy.ops.object.mode_set(mode="OBJECT")
        # bpy.ops.object.shade_smooth()
        # ob.pov.object_as = "SPHERE"
        # ob.name = ob.data.name = 'PovSphere'
        # return {'FINISHED'}
class POVRAY_OT_sphere_update(bpy.types.Operator):
    bl_idname = "pov.sphere_update"
    bl_label = "Update"
    bl_description = "Update Sphere"
    bl_options = {'REGISTER', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}

    @classmethod
    def poll(cls, context):
        engine = context.scene.render.engine
        ob = context.object
        return (ob and ob.data and ob.type == 'MESH' and engine in cls.COMPAT_ENGINES)

    def execute(self, context):

        pov_sphere_define(context, None, context.object,context.object.location)

        return {'FINISHED'}        

        
####################################CONE#######################################
def pov_cone_define(context, op, ob):
    verts = []
    faces = []
    if op:
        mesh = None
        base = op.base
        cap = op.cap
        seg = op.seg
        height = op.height
    else:
        assert(ob)
        mesh = ob.data
        base = ob.pov.cone_base_radius
        cap = ob.pov.cone_cap_radius
        seg = ob.pov.cone_segments
        height = ob.pov.cone_height 

    zc = height / 2
    zb = -zc
    angle = 2 * pi / seg
    t = 0
    for i in range(seg):
        xb = base * cos(t)
        yb = base * sin(t)
        xc = cap * cos(t)
        yc = cap * sin(t)
        verts.append((xb, yb, zb))
        verts.append((xc, yc, zc))
        t += angle
    for i in range(seg):
        f = i * 2
        if i == seg - 1:
            faces.append([0, 1, f + 1, f])
        else:
            faces.append([f + 2, f + 3, f + 1, f])
    if base != 0:
        base_face = []
        for i in range(seg - 1, -1, -1):
            p = i * 2
            base_face.append(p)
        faces.append(base_face)
    if cap != 0:
        cap_face = []
        for i in range(seg):
            p = i * 2 + 1
            cap_face.append(p)
        faces.append(cap_face)

    mesh = pov_define_mesh(mesh, verts, [], faces, "PovCone", True)
    if not ob:
        ob_base = object_utils.object_data_add(context, mesh, operator=None)
        ob = ob_base.object
        ob.pov.object_as = "CONE"
        ob.pov.cone_base_radius = base
        ob.pov.cone_cap_radius = cap
        ob.pov.cone_height = height
        ob.pov.cone_base_z = zb
        ob.pov.cone_cap_z = zc


class POVRAY_OT_cone_add(bpy.types.Operator):
    bl_idname = "pov.cone_add"
    bl_label = "Cone"
    bl_description = "Add Cone"
    bl_options = {'REGISTER', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}

    # XXX Keep it in sync with __init__'s RenderPovSettingsConePrimitive
    #     If someone knows how to define operators' props from a func, I'd be delighted to learn it!
    base = FloatProperty(
        name = "Base radius", description = "The first radius of the cone",
        default = 1.0, min = 0.01, max = 100.0)
    cap = FloatProperty(
        name = "Cap radius", description = "The second radius of the cone",
        default = 0.3, min = 0.0, max = 100.0)
    seg = IntProperty(
        name = "Segments", description = "Radial segmentation of the proxy mesh",
        default = 16, min = 3, max = 265)
    height = FloatProperty(
        name = "Height", description = "Height of the cone",
        default = 2.0, min = 0.01, max = 100.0)

    @classmethod
    def poll(cls, context):
        engine = context.scene.render.engine
        return (engine in cls.COMPAT_ENGINES)

    def execute(self, context):
        pov_cone_define(context, self, None)

        self.report({'WARNING'}, "This native POV-Ray primitive won't have any vertex to show in edit mode")        
        return {'FINISHED'}


class POVRAY_OT_cone_update(bpy.types.Operator):
    bl_idname = "pov.cone_update"
    bl_label = "Update"
    bl_description = "Update Cone"
    bl_options = {'REGISTER', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}

    @classmethod
    def poll(cls, context):
        engine = context.scene.render.engine
        ob = context.object
        return (ob and ob.data and ob.type == 'MESH' and engine in cls.COMPAT_ENGINES)

    def execute(self, context):
        bpy.ops.object.mode_set(mode="EDIT")
        bpy.ops.mesh.reveal()
        bpy.ops.mesh.select_all(action='SELECT')
        bpy.ops.mesh.delete(type='VERT')
        bpy.ops.object.mode_set(mode="OBJECT")

        pov_cone_define(context, None, context.object)

        return {'FINISHED'}
#########################################################################################################

class POVRAY_OT_isosurface_box_add(bpy.types.Operator):
    bl_idname = "pov.addisosurfacebox"
    bl_label = "Isosurface Box"
    bl_description = "Add Isosurface contained by Box"
    bl_options = {'REGISTER', 'UNDO'}


    def execute(self,context):
        layers = 20*[False]
        layers[0] = True
        bpy.ops.mesh.primitive_cube_add(layers = layers)
        ob = context.object
        bpy.ops.object.mode_set(mode="EDIT")
        self.report({'WARNING'}, "This native POV-Ray primitive "
                                 "won't have any vertex to show in edit mode")
        bpy.ops.mesh.hide(unselected=False)
        bpy.ops.object.mode_set(mode="OBJECT")
        ob.pov.object_as = "ISOSURFACE"
        ob.pov.contained_by = 'box'
        ob.name = 'Isosurface'
        return {'FINISHED'}

class POVRAY_OT_isosurface_sphere_add(bpy.types.Operator):
    bl_idname = "pov.addisosurfacesphere"
    bl_label = "Isosurface Sphere"
    bl_description = "Add Isosurface contained by Sphere"
    bl_options = {'REGISTER', 'UNDO'}


    def execute(self,context):
        layers = 20*[False]
        layers[0] = True
        bpy.ops.mesh.primitive_ico_sphere_add(subdivisions=4,layers=layers)
        ob = context.object
        bpy.ops.object.mode_set(mode="EDIT")
        self.report({'WARNING'}, "This native POV-Ray primitive "
                                 "won't have any vertex to show in edit mode")
        bpy.ops.mesh.hide(unselected=False)
        bpy.ops.object.mode_set(mode="OBJECT")
        bpy.ops.object.shade_smooth()
        ob.pov.object_as = "ISOSURFACE"
        ob.pov.contained_by = 'sphere'
        ob.name = 'Isosurface'
        return {'FINISHED'}

class POVRAY_OT_sphere_sweep_add(bpy.types.Operator):
    bl_idname = "pov.addspheresweep"
    bl_label = "Sphere Sweep"
    bl_description = "Create Sphere Sweep along curve"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self,context):
        layers = 20*[False]
        layers[0] = True
        bpy.ops.curve.primitive_nurbs_curve_add(layers = layers)
        ob = context.object
        ob.name = ob.data.name = "PovSphereSweep"
        ob.pov.curveshape = "sphere_sweep"
        ob.data.bevel_depth = 0.02
        ob.data.bevel_resolution = 4
        ob.data.fill_mode = 'FULL'
        #ob.data.splines[0].order_u = 4

        return {'FINISHED'}

class POVRAY_OT_blob_add(bpy.types.Operator):
    bl_idname = "pov.addblobsphere"
    bl_label = "Blob Sphere"
    bl_description = "Add Blob Sphere"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self,context):
        layers = 20*[False]
        layers[0] = True
        bpy.ops.object.metaball_add(type = 'BALL',layers = layers)
        ob = context.object
        ob.name = "Blob"
        return {'FINISHED'}
        

class POVRAY_OT_rainbow_add(bpy.types.Operator):        
    bl_idname = "pov.addrainbow"
    bl_label = "Rainbow"
    bl_description = "Add Rainbow"
    bl_options = {'REGISTER', 'UNDO'}
                      
    def execute(self,context):
        cam = context.scene.camera
        bpy.ops.object.lamp_add(type='SPOT', radius=1) 
        ob = context.object
        ob.data.show_cone = False
        ob.data.spot_blend = 0.5
        ob.data.shadow_buffer_clip_end = 0 
        ob.data.shadow_buffer_clip_start = 4*cam.location.length
        ob.data.distance = cam.location.length
        ob.data.energy = 0        
        ob.name = ob.data.name = "PovRainbow"
        ob.pov.object_as = "RAINBOW"
    
        #obj = context.object
        bpy.ops.object.constraint_add(type='DAMPED_TRACK')



        ob.constraints["Damped Track"].target = cam
        ob.constraints["Damped Track"].track_axis = 'TRACK_NEGATIVE_Z'
        ob.location = -cam.location

        #refocus on the actual rainbow
        bpy.context.scene.objects.active = ob
        ob.select=True
        
        return {'FINISHED'}

class POVRAY_OT_height_field_add(bpy.types.Operator, ImportHelper):
    bl_idname = "pov.addheightfield"
    bl_label = "Height Field"
    bl_description = "Add Height Field "
    bl_options = {'REGISTER', 'UNDO'}
    
    # XXX Keep it in sync with __init__'s hf Primitive
    # filename_ext = ".png"
    
    # filter_glob = StringProperty(
            # default="*.exr;*.gif;*.hdr;*.iff;*.jpeg;*.jpg;*.pgm;*.png;*.pot;*.ppm;*.sys;*.tga;*.tiff;*.EXR;*.GIF;*.HDR;*.IFF;*.JPEG;*.JPG;*.PGM;*.PNG;*.POT;*.PPM;*.SYS;*.TGA;*.TIFF",
            # options={'HIDDEN'},
            # )
    quality = IntProperty(name = "Quality",
                      description = "",
                      default = 100, min = 1, max = 100)
    hf_filename = StringProperty(maxlen = 1024)
    
    hf_gamma = FloatProperty(
            name="Gamma",
            description="Gamma",
            min=0.0001, max=20.0, default=1.0)

    hf_premultiplied = BoolProperty(
            name="Premultiplied",
            description="Premultiplied",
            default=True)

    hf_smooth = BoolProperty(
            name="Smooth",
            description="Smooth",
            default=False)

    hf_water = FloatProperty(
            name="Water Level",
            description="Wather Level",
            min=0.00, max=1.00, default=0.0)

    hf_hierarchy = BoolProperty(
            name="Hierarchy",
            description="Height field hierarchy",
            default=True)
    def execute(self,context):
        props = self.properties
        impath = bpy.path.abspath(self.filepath)
        img = bpy.data.images.load(impath)
        im_name = img.name
        im_name, file_extension = os.path.splitext(im_name)
        hf_tex = bpy.data.textures.new('%s_hf_image'%im_name, type = 'IMAGE')
        hf_tex.image = img
        mat = bpy.data.materials.new('Tex_%s_hf'%im_name)
        hf_slot = mat.texture_slots.create(-1)
        hf_slot.texture = hf_tex
        layers = 20*[False]
        layers[0] = True
        quality = props.quality
        res = 100/quality
        w,h = hf_tex.image.size[:]
        w = int(w/res)
        h = int(h/res)
        bpy.ops.mesh.primitive_grid_add(x_subdivisions=w, y_subdivisions=h,radius = 0.5,layers=layers)
        ob = context.object
        ob.name = ob.data.name = '%s'%im_name
        ob.data.materials.append(mat)
        bpy.ops.object.mode_set(mode="EDIT")
        bpy.ops.mesh.noise(factor=1)
        bpy.ops.object.mode_set(mode="OBJECT")
        
        #needs a loop to select by index? 
        #bpy.ops.object.material_slot_remove()
        #material just left there for now
       
      
        mat.texture_slots.clear(-1)
        bpy.ops.object.mode_set(mode="EDIT")
        bpy.ops.mesh.hide(unselected=False)
        bpy.ops.object.mode_set(mode="OBJECT")
        ob.pov.object_as = 'HEIGHT_FIELD'
        ob.pov.hf_filename = impath
        return {'FINISHED'}
        
        
############################TORUS############################################
def pov_torus_define(context, op, ob):
        if op:
            mas = op.mas
            mis = op.mis
            mar = op.mar
            mir = op.mir
        else:
            assert(ob)
            mas = ob.pov.torus_major_segments
            mis = ob.pov.torus_minor_segments
            mar = ob.pov.torus_major_radius
            mir = ob.pov.torus_minor_radius
            
            #keep object rotation and location for the add object operator
            obrot = ob.rotation_euler
            obloc = ob.location
            
            bpy.ops.object.mode_set(mode="EDIT")
            bpy.ops.mesh.reveal()
            bpy.ops.mesh.select_all(action='SELECT')
            bpy.ops.mesh.delete(type='VERT')
            bpy.ops.mesh.primitive_torus_add(rotation = obrot, location = obloc, major_segments=mas, minor_segments=mis,major_radius=mar, minor_radius=mir)
            

            bpy.ops.mesh.hide(unselected=False)
            bpy.ops.object.mode_set(mode="OBJECT")
                   

        if not ob:
            bpy.ops.mesh.primitive_torus_add(major_segments=mas, minor_segments=mis,major_radius=mar, minor_radius=mir)
            ob = context.object
            ob.name =  ob.data.name = "PovTorus"
            ob.pov.object_as = "TORUS"
            ob.pov.torus_major_segments = mas
            ob.pov.torus_minor_segments = mis
            ob.pov.torus_major_radius = mar
            ob.pov.torus_minor_radius = mir
            bpy.ops.object.mode_set(mode="EDIT")
            bpy.ops.mesh.hide(unselected=False)
            bpy.ops.object.mode_set(mode="OBJECT")
            
class POVRAY_OT_torus_add(bpy.types.Operator):
    bl_idname = "pov.addtorus"
    bl_label = "Torus"
    bl_description = "Add Torus"
    bl_options = {'REGISTER', 'UNDO'}
    
    # XXX Keep it in sync with __init__'s torus Primitive
    mas = IntProperty(name = "Major Segments",
                    description = "",
                    default = 48, min = 3, max = 720)
    mis = IntProperty(name = "Minor Segments",
                    description = "",
                    default = 12, min = 3, max = 720)
    mar = FloatProperty(name = "Major Radius",
                    description = "",
                    default = 1.0)
    mir = FloatProperty(name = "Minor Radius",
                    description = "",
                    default = 0.25)
    def execute(self,context):
        props = self.properties
        mar = props.mar
        mir = props.mir
        mas = props.mas
        mis = props.mis
        pov_torus_define(context, self, None)
        self.report({'WARNING'}, "This native POV-Ray primitive "
                                 "won't have any vertex to show in edit mode")
        return {'FINISHED'}


class POVRAY_OT_torus_update(bpy.types.Operator):
    bl_idname = "pov.torus_update"
    bl_label = "Update"
    bl_description = "Update Torus"
    bl_options = {'REGISTER', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}

    @classmethod
    def poll(cls, context):
        engine = context.scene.render.engine
        ob = context.object
        return (ob and ob.data and ob.type == 'MESH' and engine in cls.COMPAT_ENGINES)

    def execute(self, context):

        pov_torus_define(context, None, context.object)

        return {'FINISHED'}        
        
###################################################################################


class POVRAY_OT_prism_add(bpy.types.Operator):
    bl_idname = "pov.addprism"
    bl_label = "Prism"
    bl_description = "Create Prism"
    bl_options = {'REGISTER', 'UNDO'}
    
    prism_n = IntProperty(name = "Sides",
                description = "Number of sides",
                default = 5, min = 3, max = 720)
    prism_r = FloatProperty(name = "Radius",
                    description = "Radius",
                    default = 1.0)
    def execute(self,context):
        
        props = self.properties
        loftData = bpy.data.curves.new('Prism', type='CURVE')
        loftData.dimensions = '2D'
        loftData.resolution_u = 2
        loftData.show_normal_face = False
        loftData.extrude = 2
        n=props.prism_n
        r=props.prism_r
        coords = []
        z = 0
        angle = 0
        for p in range(n):
            x = r*cos(angle)
            y = r*sin(angle)
            coords.append((x,y,z))
            angle+=pi*2/n
        poly = loftData.splines.new('POLY')
        poly.points.add(len(coords)-1)
        for i, coord in enumerate(coords):
            x,y,z = coord
            poly.points[i].co = (x, y, z, 1)
        poly.use_cyclic_u = True

        ob = bpy.data.objects.new('Prism_shape', loftData)
        scn = bpy.context.scene
        scn.objects.link(ob)
        scn.objects.active = ob
        ob.select = True
        ob.pov.curveshape = "prism"
        ob.name = ob.data.name = "Prism"
        return {'FINISHED'}
        
##############################PARAMETRIC######################################
def pov_parametric_define(context, op, ob):      
        if op:
            u_min = op.u_min
            u_max = op.u_max
            v_min = op.v_min
            v_max = op.v_max
            x_eq = op.x_eq
            y_eq = op.y_eq
            z_eq = op.z_eq

        else:
            assert(ob)
            u_min = ob.pov.u_min
            u_max = ob.pov.u_max
            v_min = ob.pov.v_min
            v_max = ob.pov.v_max
            x_eq = ob.pov.x_eq
            y_eq = ob.pov.y_eq
            z_eq = ob.pov.z_eq
            
            #keep object rotation and location for the updated object
            obloc = ob.location
            obrot = ob.rotation_euler # In radians
            #Parametric addon has no loc rot, some extra work is needed
            #in case cursor has moved
            curloc = bpy.context.scene.cursor_location

    
            bpy.ops.object.mode_set(mode="EDIT")
            bpy.ops.mesh.reveal()
            bpy.ops.mesh.select_all(action='SELECT')
            bpy.ops.mesh.delete(type='VERT')
            bpy.ops.mesh.primitive_xyz_function_surface(x_eq=x_eq, y_eq=y_eq, z_eq=z_eq, range_u_min=u_min, range_u_max=u_max, range_v_min=v_min, range_v_max=v_max)
            bpy.ops.mesh.select_all(action='SELECT')
            #extra work:
            bpy.ops.transform.translate(value=(obloc-curloc), proportional_size=1)
            bpy.ops.transform.rotate(axis=obrot, proportional_size=1)
            
            bpy.ops.mesh.hide(unselected=False)
            bpy.ops.object.mode_set(mode="OBJECT")


        if not ob:
            bpy.ops.mesh.primitive_xyz_function_surface(x_eq=x_eq, y_eq=y_eq, z_eq=z_eq, range_u_min=u_min, range_u_max=u_max, range_v_min=v_min, range_v_max=v_max)
            ob = context.object
            ob.name =  ob.data.name = "PovParametric"
            ob.pov.object_as = "PARAMETRIC"
            
            ob.pov.u_min = u_min
            ob.pov.u_max = u_max
            ob.pov.v_min = v_min
            ob.pov.v_max = v_max
            ob.pov.x_eq = x_eq
            ob.pov.y_eq = y_eq
            ob.pov.z_eq = z_eq

            bpy.ops.object.mode_set(mode="EDIT")
            bpy.ops.mesh.hide(unselected=False)
            bpy.ops.object.mode_set(mode="OBJECT")
class POVRAY_OT_parametric_add(bpy.types.Operator):
    bl_idname = "pov.addparametric"
    bl_label = "Parametric"
    bl_description = "Add Paramertic"
    bl_options = {'REGISTER', 'UNDO'}

    # XXX Keep it in sync with __init__'s Parametric primitive
    u_min = FloatProperty(name = "U Min",
                    description = "",
                    default = 0.0)
    v_min = FloatProperty(name = "V Min",
                    description = "",
                    default = 0.0)
    u_max = FloatProperty(name = "U Max",
                    description = "",
                    default = 6.28)
    v_max = FloatProperty(name = "V Max",
                    description = "",
                    default = 12.57)
    x_eq = StringProperty(
                    maxlen=1024, default = "cos(v)*(1+cos(u))*sin(v/8)")
    y_eq = StringProperty(
                    maxlen=1024, default = "sin(u)*sin(v/8)+cos(v/8)*1.5")
    z_eq = StringProperty(
                    maxlen=1024, default = "sin(v)*(1+cos(u))*sin(v/8)")
    
    def execute(self,context):
        props = self.properties
        u_min = props.u_min
        v_min = props.v_min
        u_max = props.u_max
        v_max = props.v_max
        x_eq = props.x_eq
        y_eq = props.y_eq
        z_eq = props.z_eq
        
        pov_parametric_define(context, self, None)
        self.report({'WARNING'}, "This native POV-Ray primitive "
                                 "won't have any vertex to show in edit mode")
        return {'FINISHED'}

class POVRAY_OT_parametric_update(bpy.types.Operator):
    bl_idname = "pov.parametric_update"
    bl_label = "Update"
    bl_description = "Update parametric object"
    bl_options = {'REGISTER', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}

    @classmethod
    def poll(cls, context):
        engine = context.scene.render.engine
        ob = context.object
        return (ob and ob.data and ob.type == 'MESH' and engine in cls.COMPAT_ENGINES)

    def execute(self, context):

        pov_parametric_define(context, None, context.object)

        return {'FINISHED'}
#######################################################################
class POVRAY_OT_shape_polygon_to_circle_add(bpy.types.Operator):
    bl_idname = "pov.addpolygontocircle"
    bl_label = "Polygon To Circle Blending"
    bl_description = "Add Polygon To Circle Blending Surface"
    bl_options = {'REGISTER', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}
    
    # XXX Keep it in sync with __init__'s polytocircle properties
    polytocircle_resolution = IntProperty(name = "Resolution",
                    description = "",
                    default = 3, min = 0, max = 256)
    polytocircle_ngon = IntProperty(name = "NGon",
                    description = "",
                    min = 3, max = 64,default = 5)
    polytocircle_ngonR = FloatProperty(name = "NGon Radius",
                    description = "",
                    default = 0.3)
    polytocircle_circleR = FloatProperty(name = "Circle Radius",
                    description = "",
                    default = 1.0)
    def execute(self,context):
        props = self.properties
        ngon = props.polytocircle_ngon
        ngonR = props.polytocircle_ngonR
        circleR = props.polytocircle_circleR
        resolution = props.polytocircle_resolution
        layers = 20*[False]
        layers[0] = True
        bpy.ops.mesh.primitive_circle_add(vertices=ngon, radius=ngonR, fill_type='NGON',enter_editmode=True, layers=layers)
        bpy.ops.transform.translate(value=(0, 0, 1))
        bpy.ops.mesh.subdivide(number_cuts=resolution)
        numCircleVerts = ngon + (ngon*resolution)
        bpy.ops.mesh.select_all(action='DESELECT')
        bpy.ops.mesh.primitive_circle_add(vertices=numCircleVerts, radius=circleR, fill_type='NGON',enter_editmode=True, layers=layers)
        bpy.ops.transform.translate(value=(0, 0, -1))
        bpy.ops.mesh.select_all(action='SELECT')
        bpy.ops.mesh.bridge_edge_loops()
        if ngon < 5:
            bpy.ops.mesh.select_all(action='DESELECT')
            bpy.ops.mesh.primitive_circle_add(vertices=ngon, radius=ngonR, fill_type='TRIFAN',enter_editmode=True, layers=layers)
            bpy.ops.transform.translate(value=(0, 0, 1))
            bpy.ops.mesh.select_all(action='SELECT')
            bpy.ops.mesh.remove_doubles()
        bpy.ops.object.mode_set(mode='OBJECT')
        ob = context.object
        ob.name = "Polygon_To_Circle"
        ob.pov.object_as = 'POLYCIRCLE'
        ob.pov.ngon = ngon
        ob.pov.ngonR = ngonR
        ob.pov.circleR = circleR
        bpy.ops.object.mode_set(mode="EDIT")
        bpy.ops.mesh.hide(unselected=False)
        bpy.ops.object.mode_set(mode="OBJECT")
        return {'FINISHED'}
        
#############################IMPORT
class ImportAvogadroPOV(bpy.types.Operator, ImportHelper):
    """Load Povray File as output by Avogadro"""
    bl_idname = "import_scene.avogadro"
    bl_label = "Import POV Avogadro"
    bl_options = {'PRESET', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}

    filename_ext = ".pov"
    filter_glob = StringProperty(
            default="*.pov",
            options={'HIDDEN'},
            )

    def execute(self, context):
        coords=[]
        colors = []
        matNames = []
        xall = yall = zall = []
        layers = 20*[False]
        layers[0] = True
        ob = None
        camloc = (0,0,0)
        filepov = bpy.path.abspath(self.filepath)
        for line in open(filepov):
            string = line.replace("<"," ")
            chars = [">","{","}",","]
            for symbol in chars:
                string = string.replace(symbol," ")
            split = string.split()
            if split and split[0] == "location":
                x = float(split[1])
                y = float(split[2])
                z = float(split[3])
                camloc = ((x,y,z))
            if split and len(split) == 7:
                try:
                    x1 = float(split[0])
                    coords.append(x1)
                except:
                    pass
                if coords != []:            
                    x1 = float(split[0])
                    y1 = float(split[1])
                    z1 = float(split[2])
                    x2 = float(split[3])
                    y2 = float(split[4])
                    z2 = float(split[5])
                    xall.append(x1)
                    yall.append(y1)
                    zall.append(z1)
                    xall.append(x2)
                    yall.append(y2)
                    zall.append(z2)
                    radius = float(split[6])
                    curveData = bpy.data.curves.new('myCurve', type='CURVE')
                    curveData.dimensions = '3D'
                    curveData.resolution_u = 2
                    curveData.fill_mode = "FULL"
                    curveData.bevel_depth = radius
                    curveData.bevel_resolution = 5
                    polyline = curveData.splines.new('POLY')
                    polyline.points.add(1) 
                    polyline.points[0].co = (x1, y1, z1, 1)
                    polyline.points[1].co = (x2, y2, z2, 1)
                    ob = bpy.data.objects.new('myCurve', curveData)
                    scn = bpy.context.scene
                    scn.objects.link(ob)
                    scn.objects.active = ob
                    ob.select = True
                    bpy.ops.object.convert(target='MESH',keep_original=False)
                    #XXX TODO use a PovCylinder instead of mesh 
                    #but add end points and radius to addPovcylinder op first
                    ob.select=False
                    coords = []
            if split and len(split) == 4:
                try:
                    x = float(split[0])
                    coords.append(x)
                except:
                    pass
                if coords != []:
                    x = float(split[0])
                    y = float(split[1])
                    z = float(split[2])
                    xall.append(x)
                    yall.append(y)
                    zall.append(z)
                    radius = float(split[3])
                    

                    ob.pov.imported_loc=(x, y, z)
                    bpy.ops.pov.addsphere(R=radius, imported_loc=(x, y, z))
                    bpy.ops.object.shade_smooth()
                    ob = bpy.context.object
                    coords = []        
            if split and len(split) == 6:
                if split[0] == "pigment":
                    r,g,b,t = float(split[2]),float(split[3]),float(split[4]),float(split[5])
                    color = (r,g,b,t)
                    if colors == [] or (colors != [] and color not in colors):
                        colors.append(color)
                        name = ob.name+"_mat"
                        matNames.append(name)
                        mat = bpy.data.materials.new(name)
                        mat.diffuse_color = (r,g,b)
                        mat.alpha = 1-t
                        ob.data.materials.append(mat)
                        print (colors)
                    else:
                        for i in range(len(colors)):
                            if color == colors[i]:
                                ob.data.materials.append(bpy.data.materials[matNames[i]])
        x0 = min(xall)
        x1 = max(xall)
        y0 = min(yall)
        y1 = max(yall)
        z0 = min(zall)
        z1 = max(zall)
        x = (x0+x1)/2
        y = (y0+y1)/2
        z = (z0+z1)/2
        bpy.ops.object.empty_add(layers=layers)
        ob = bpy.context.object
        ob.location = ((x,y,z))
        for obj in bpy.context.scene.objects:
            if obj.type == "CAMERA":
                track = obj.constraints.new(type = "TRACK_TO")
                track.target = ob
                track.track_axis ="TRACK_NEGATIVE_Z"
                track.up_axis = "UP_Y"
                obj.location = camloc
        for obj in bpy.context.scene.objects:
            if obj.type == "LAMP":
                obj.location = camloc
                obj.pov.light_type = "shadowless"
                break
        return {'FINISHED'}