primitives.py

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# <pep8 compliant>

""" Get POV-Ray specific objects In and Out of Blender """

import bpy
import os.path
from bpy_extras.io_utils import ImportHelper
from bpy_extras import object_utils
from bpy.utils import register_class
from math import atan, pi, degrees, sqrt, cos, sin


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

from mathutils import Vector, Matrix

# import collections


def pov_define_mesh(mesh, verts, edges, faces, name, hide_geometry=True):
    """Generate proxy mesh."""
    if mesh is None:
        mesh = bpy.data.meshes.new(name)
    mesh.from_pydata(verts, edges, faces)
    mesh.update()
    mesh.validate(
        verbose=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):
    """Add the representation of POV lathe using a screw modifier."""

    bl_idname = "pov.addlathe"
    bl_label = "Lathe"
    bl_options = {'REGISTER', 'UNDO'}
    bl_description = "adds lathe"

    def execute(self, context):
        # ayers=[False]*20
        # layers[0]=True
        bpy.ops.curve.primitive_bezier_curve_add(
            location=context.scene.cursor.location,
            rotation=(0, 0, 0),
            # layers=layers,
        )
        ob = context.view_layer.objects.active
        ob_data = ob.data
        ob.name = ob_data.name = "PovLathe"
        ob_data.dimensions = '2D'
        ob_data.transform(Matrix.Rotation(-pi / 2.0, 4, 'Z'))
        ob.pov.object_as = 'LATHE'
        self.report({'INFO'}, "This native POV-Ray primitive")
        ob.pov.curveshape = "lathe"
        bpy.ops.object.modifier_add(type='SCREW')
        mod = ob.modifiers[-1]
        mod.axis = 'Y'
        mod.show_render = False
        return {'FINISHED'}


def pov_superellipsoid_define(context, op, ob):
    """Create the proxy mesh of a POV superellipsoid using the pov_superellipsoid_define() function."""

    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 = object_utils.object_data_add(context, mesh, operator=None)
        # 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):
    """Add the representation of POV superellipsoid using the pov_superellipsoid_define() function."""

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

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

    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 = object_utils.object_data_add(context, mesh, operator=None)
        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):
    """Add the representation of POV supertorus using the pov_supertorus_define() function."""

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

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

    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):
    """Create the representation of POV loft using Blender curves."""

    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 # deprecated in 2.8
        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.collection.objects.link(ob)
        context.view_layer.objects.active = ob
        ob.select_set(True)
        ob.pov.curveshape = "loft"
        return {'FINISHED'}


class POVRAY_OT_plane_add(bpy.types.Operator):
    """Add the representation of POV infinite plane using just a very big Blender Plane.

    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.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(size=100000)
        ob = context.object
        ob.name = ob.data.name = 'PovInfinitePlane'
        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 = "PLANE"
        return {'FINISHED'}


class POVRAY_OT_box_add(bpy.types.Operator):
    """Add the representation of POV box using a simple 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.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()
        ob = context.object
        ob.name = ob.data.name = 'PovBox'
        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 = "BOX"
        return {'FINISHED'}


def pov_cylinder_define(context, op, ob, radius, loc, loc_cap):
    if op:
        R = op.R
        loc = bpy.context.scene.cursor.location
        loc_cap[0] = loc[0]
        loc_cap[1] = loc[1]
        loc_cap[2] = loc[2] + 2
    vec = Vector(loc_cap) - Vector(loc)
    depth = vec.length
    rot = Vector((0, 0, 1)).rotation_difference(vec)  # Rotation from Z axis.
    trans = rot @ Vector(
        (0, 0, depth / 2)
    )  # Such that origin is at center of the base of the cylinder.
    roteuler = rot.to_euler()
    if not ob:
        bpy.ops.object.add(type='MESH', location=loc)
        ob = context.object
        ob.name = ob.data.name = "PovCylinder"
        ob.pov.cylinder_radius = radius
        ob.pov.cylinder_location_cap = vec
        ob.pov.object_as = "CYLINDER"
    else:
        ob.location = loc

    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_cylinder_add(
        radius=radius,
        depth=depth,
        location=loc,
        rotation=roteuler,
        end_fill_type='NGON',
    )  #'NOTHING'
    bpy.ops.transform.translate(value=trans)

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


class POVRAY_OT_cylinder_add(bpy.types.Operator):
    """Add the representation of POV cylinder using pov_cylinder_define() function.

    Use imported_cyl_loc when this operator is run by POV importer."""

    bl_idname = "pov.addcylinder"
    bl_label = "Cylinder"
    bl_description = "Add Cylinder"
    bl_options = {'REGISTER', 'UNDO'}

    # XXX Keep it in sync with __init__'s cylinder Primitive
    R: FloatProperty(name="Cylinder radius", min=0.00, max=10.0, default=1.0)

    imported_cyl_loc: FloatVectorProperty(
        name="Imported Pov base location", precision=6, default=(0.0, 0.0, 0.0)
    )

    imported_cyl_loc_cap: FloatVectorProperty(
        name="Imported Pov cap location", precision=6, default=(0.0, 0.0, 2.0)
    )

    def execute(self, context):
        props = self.properties
        R = props.R
        ob = context.object
        # layers = 20*[False]
        # layers[0] = True
        if ob:
            if ob.pov.imported_cyl_loc:
                LOC = ob.pov.imported_cyl_loc
            if ob.pov.imported_cyl_loc_cap:
                LOC_CAP = ob.pov.imported_cyl_loc_cap
        else:
            if not props.imported_cyl_loc:
                LOC_CAP = LOC = bpy.context.scene.cursor.location
                LOC_CAP[2] += 2.0
            else:
                LOC = props.imported_cyl_loc
                LOC_CAP = props.imported_cyl_loc_cap
            self.report(
                {'INFO'},
                "This native POV-Ray primitive "
                "won't have any vertex to show in edit mode",
            )

        pov_cylinder_define(context, self, None, self.R, LOC, LOC_CAP)

        return {'FINISHED'}


class POVRAY_OT_cylinder_update(bpy.types.Operator):
    """Update the POV cylinder.

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

    bl_idname = "pov.cylinder_update"
    bl_label = "Update"
    bl_description = "Update Cylinder"
    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 ob.pov.object_as == "CYLINDER"
            and engine in cls.COMPAT_ENGINES
        )

    def execute(self, context):
        ob = context.object
        radius = ob.pov.cylinder_radius
        loc = ob.location
        loc_cap = loc + ob.pov.cylinder_location_cap

        pov_cylinder_define(context, None, ob, radius, loc, loc_cap)

        return {'FINISHED'}


################################SPHERE##########################################
def pov_sphere_define(context, op, ob, loc):
    """create the representation of POV sphere using a Blender icosphere.

    Its nice platonic solid curvature better represents pov rendertime
    tesselation than a UV sphere"""

    if op:
        R = op.R
        loc = bpy.context.scene.cursor.location
    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,
            radius=ob.pov.sphere_radius,
            location=loc,
            rotation=obrot,
        )
        # bpy.ops.transform.rotate(axis=obrot,orient_type='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.object.shade_smooth()
        # bpy.ops.transform.rotate(axis=obrot,orient_type='GLOBAL')

    if not ob:
        bpy.ops.mesh.primitive_ico_sphere_add(
            subdivisions=4, radius=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):
    """Add the representation of POV sphere using pov_sphere_define() function.

    Use imported_loc when this operator is run by POV importer."""

    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:
            if not props.imported_loc:
                LOC = bpy.context.scene.cursor.location

            else:
                LOC = props.imported_loc
                self.report(
                    {'INFO'},
                    "This native POV-Ray primitive "
                    "won't have any vertex to show in edit mode",
                )
        pov_sphere_define(context, self, None, LOC)

        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)
    # 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 = "SPHERE"
    # ob.name = ob.data.name = 'PovSphere'
    # return {'FINISHED'}


class POVRAY_OT_sphere_update(bpy.types.Operator):
    """Update the POV sphere.

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

    bl_idname = "pov.sphere_update"
    bl_label = "Update"
    bl_description = "Update Sphere"