primitives.py

    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):
    """Add the representation of POV cone using pov_define_mesh() function.

    Blender cone does not offer the same features such as a second radius."""
    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 = object_utils.object_data_add(context, mesh, operator=None)
        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):
    """Add the representation of POV cone using pov_cone_define() function."""

    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__.py'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(
            {'INFO'},
            "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):
    """Update the POV cone.

    Delete its previous proxy geometry and rerun pov_cone_define() function
    with the new parameters"""

    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'}


########################################ISOSURFACES##################################


class POVRAY_OT_isosurface_box_add(bpy.types.Operator):
    """Add the representation of POV isosurface box using also just a Blender mesh cube.

    Flag its primitive type with a specific pov.object_as attribute and lock edit mode
    to keep proxy consistency by hiding edit geometry."""

    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()
        ob = context.object
        bpy.ops.object.mode_set(mode="EDIT")
        self.report(
            {'INFO'},
            "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 = 'PovIsosurfaceBox'
        return {'FINISHED'}


class POVRAY_OT_isosurface_sphere_add(bpy.types.Operator):
    """Add the representation of POV isosurface sphere by a Blender mesh icosphere.

    Flag its primitive type with a specific pov.object_as attribute and lock edit mode
    to keep proxy consistency by hiding edit geometry."""

    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)
        ob = context.object
        bpy.ops.object.mode_set(mode="EDIT")
        self.report(
            {'INFO'},
            "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 = 'PovIsosurfaceSphere'
        return {'FINISHED'}


class POVRAY_OT_sphere_sweep_add(bpy.types.Operator):
    """Add the representation of POV sphere_sweep using a Blender NURBS curve.

    Flag its primitive type with a specific ob.pov.curveshape attribute and
    leave access to edit mode to keep user editable handles."""

    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()
        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):
    """Add the representation of POV blob using a Blender meta ball.

    No need to flag its primitive type as meta are exported to blobs
    and leave access to edit mode to keep user editable thresholds."""

    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')
        ob = context.object
        ob.name = "PovBlob"
        return {'FINISHED'}


class POVRAY_OT_rainbow_add(bpy.types.Operator):
    """Add the representation of POV rainbow using a Blender spot light.

    Rainbows indeed propagate along a visibility cone.
    Flag its primitive type with a specific ob.pov.object_as attribute
    and leave access to edit mode to keep user editable handles.
    Add a constraint to orient it towards camera because POV Rainbows
    are view dependant and having it always initially visible is less
    confusing """

    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.light_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 # deprecated in 2.8
        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.view_layer.objects.active = ob
        ob.select_set(True)

        return {'FINISHED'}


class POVRAY_OT_height_field_add(bpy.types.Operator, ImportHelper):
    """Add the representation of POV height_field using a displaced grid.

    texture slot fix and displace modifier will be needed because noise
    displace operator was deprecated in 2.8"""

    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.pov_texture_slots.add()
        hf_slot.texture = hf_tex.name
        # 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, size=0.5
        )
        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) # TODO replace by a displace modifier as noise deprecated in 2.8
        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.pov_texture_slots.clear()
        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):
    """Add the representation of POV torus using just a Blender torus.

    But flag its primitive type with a specific pov.object_as attribute and lock edit mode
    to keep proxy consistency by hiding edit geometry."""

    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):
    """Add the representation of POV torus using using pov_torus_define() function."""

    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(
            {'INFO'},
            "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):
    """Update the POV torus.

    Delete its previous proxy geometry and rerun pov_torus_define() function
    with the new parameters"""

    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):
    """Add the representation of POV prism using using an extruded curve."""

    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.collection.objects.link(ob)
        context.view_layer.objects.active = ob
        ob.select_set(True)
        ob.pov.curveshape = "prism"
        ob.name = ob.data.name = "Prism"
        return {'FINISHED'}


##############################PARAMETRIC######################################
def pov_parametric_define(context, op, ob):
    """Add the representation of POV parametric surfaces by math surface from add mesh extra objects addon."""

    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):
    """Add the representation of POV parametric surfaces using pov_parametric_define() function."""

    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(
            {'INFO'},
            "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):
    """Update the representation of POV parametric surfaces.

    Delete its previous proxy geometry and rerun pov_parametric_define() function
    with the new parameters"""

    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):
    """Add the proxy mesh for POV Polygon to circle lofting macro"""

    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
        )
        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,
        )
        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,
            )
            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 ImportPOV(bpy.types.Operator, ImportHelper):
    """Load Povray files"""

    bl_idname = "import_scene.pov"
    bl_label = "POV-Ray files (.pov/.inc)"
    bl_options = {'PRESET', 'UNDO'}
    COMPAT_ENGINES = {'POVRAY_RENDER'}

    # -----------
    # File props.
    files: CollectionProperty(
        type=bpy.types.OperatorFileListElement, options={'HIDDEN', 'SKIP_SAVE'}
    )
    directory: StringProperty(
        maxlen=1024, subtype='FILE_PATH', options={'HIDDEN', 'SKIP_SAVE'}
    )

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

    import_at_cur: BoolProperty(
        name="Import at Cursor Location",
        description="Ignore Object Matrix",
        default=False,
    )

    def execute(self, context):
        from mathutils import Matrix

        verts = []
        faces = []
        materials = []
        blendMats = []  ##############
        povMats = []  ##############
        colors = []
        matNames = []
        lenverts = None
        lenfaces = None
        suffix = -1
        name = 'Mesh2_%s' % suffix
        name_search = False
        verts_search = False
        faces_search = False
        plane_search = False
        box_search = False
        cylinder_search = False
        sphere_search = False
        cone_search = False
        tex_search = False  ##################
        cache = []
        matrixes = {}
        writematrix = False
        index = None
        value = None
        # filepov = bpy.path.abspath(self.filepath) #was used for single files

        def mat_search(cache):
            r = g = b = 0.5
            f = t = 0
            color = None

            for item, value in enumerate(cache):

                if value == 'texture':
                    pass

                if value == 'pigment':

                    if cache[item + 2] in {'rgb', 'srgb'}:
                        pass

                    elif cache[item + 2] in {'rgbf', 'srgbf'}:
                        pass

                    elif cache[item + 2] in {'rgbt', 'srgbt'}:
                        try:
                            r, g, b, t = (
                                float(cache[item + 3]),
                                float(cache[item + 4]),
                                float(cache[item + 5]),
                                float(cache[item + 6]),
                            )
                        except:
                            r = g = b = t = float(cache[item + 2])
                        color = (r, g, b, t)

                    elif cache[item + 2] in {'rgbft', 'srgbft'}:
                        pass

                    else:
                        pass

            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
                if mat.alpha != 1:
                    mat.use_transparency = True
                ob.data.materials.append(mat)

            else:
                for i, value in enumerate(colors):
                    if color == value:
                        ob.data.materials.append(
                            bpy.data.materials[matNames[i]]
                        )

        for file in self.files:
            print("Importing file: " + file.name)
            filepov = self.directory + file.name
            for line in open(filepov):
                string = line.replace("{", " ")
                string = string.replace("}", " ")
                string = string.replace("<", " ")
                string = string.replace(">", " ")
                string = string.replace(",", " ")
                lw = string.split()
                lenwords = len(lw)
                if lw:
                    if lw[0] == "object":
                        writematrix = True
                    if writematrix:
                        if lw[0] not in {"object", "matrix"}:
                            index = lw[0]
                        if lw[0] in {"matrix"}:
                            value = [
                                float(lw[1]),
                                float(lw[2]),
                                float(lw[3]),
                                float(lw[4]),
                                float(lw[5]),
                                float(lw[6]),
                                float(lw[7]),
                                float(lw[8]),
                                float(lw[9]),
                                float(lw[10]),
                                float(lw[11]),
                                float(lw[12]),
                            ]
                            matrixes[index] = value
                            writematrix = False
            for line in open(filepov):
                S = line.replace("{", " { ")
                S = S.replace("}", " } ")
                S = S.replace(",", " ")
                S = S.replace("<", "")
                S = S.replace(">", " ")
                S = S.replace("=", " = ")
                S = S.replace(";", " ; ")
                S = S.split()
                lenS = len(S)
                for i, word in enumerate(S):
                    ##################Primitives Import##################
                    if word == 'cone':
                        cone_search = True
                        name_search = False
                    if cone_search:
                        cache.append(word)
                        if cache[-1] == '}':
                            try:
                                x0 = float(cache[2])
                                y0 = float(cache[3])
                                z0 = float(cache[4])
                                r0 = float(cache[5])
                                x1 = float(cache[6])
                                y1 = float(cache[7])
                                z1 = float(cache[8])
                                r1 = float(cache[9])
                                # Y is height in most pov files, not z
                                bpy.ops.pov.cone_add(
                                    base=r0, cap=r1, height=(y1 - y0)
                                )
                                ob = context.object
                                ob.location = (x0, y0, z0)
                                # ob.scale = (r,r,r)
                                mat_search(cache)
                            except (ValueError):
                                pass
                            cache = []
                            cone_search = False
                    if word == 'plane':
                        plane_search = True
                        name_search = False
                    if plane_search:
                        cache.append(word)
                        if cache[-1] == '}':
                            try:
                                bpy.ops.pov.addplane()
                                ob = context.object
                                mat_search(cache)