model_primitives_topology.py

# SPDX-License-Identifier: GPL-2.0-or-later

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

from math import pi, cos, sin
import os.path
import bpy
from bpy_extras.object_utils import object_data_add
from bpy_extras.io_utils import ImportHelper
from bpy.utils import register_class, unregister_class
from bpy.types import Operator

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

from mathutils import Vector, Matrix

from . import model_primitives

class POV_OT_lathe_add(Operator):
    """Add the representation of POV lathe using a screw modifier."""

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

    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" "won't have any vertex to show in edit mode"
        )
        ob.pov.curveshape = "lathe"
        bpy.ops.object.modifier_add(type="SCREW")
        mod = ob.modifiers[-1]
        mod.axis = "Y"
        mod.show_render = False
        ob.update_tag() # as prop set via python not updated in depsgraph
        return {"FINISHED"}


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

    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 < cos(angSegment)) or (cos(angRing) > 0 > cos(angSegment)):
                x = -x
            y = r * (abs(cos(angRing)) ** n1) * (abs(sin(angSegment)) ** n2)
            if (cos(angRing) < 0 < sin(angSegment)) or (cos(angRing) > 0 > sin(angSegment)):
                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.extend([(0, 0, 1),(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 = list(range(v))
        faces.append(face)
        face = []
        indexUp = len(verts) - 1
        for i in range(0, v):
            face.append(indexUp - i)
        faces.append(face)
    mesh = model_primitives.pov_define_mesh(mesh, verts, [], faces, "SuperEllipsoid")

    if not ob:
        ob = 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.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")
        ob.data.auto_smooth_angle = 1.3
        bpy.ops.object.shade_smooth()
        ob.pov.object_as = "SUPERELLIPSOID"
        ob.update_tag() # as prop set via python not updated in depsgraph

class POV_OT_superellipsoid_add(Operator):
    """Add the representation of POV superellipsoid using the pov_superellipsoid_define()."""

    bl_idname = "pov.addsuperellipsoid"
    bl_label = "Add SuperEllipsoid"
    bl_description = "Create a SuperEllipsoid"
    bl_options = {'REGISTER', 'UNDO'}
    COMPAT_ENGINES = {"POVRAY_RENDER"}

    # Keep in sync within model_properties.py section Superellipsoid
    # as this allows interactive update
    #     If someone knows how to define operators' props from a func, I'd be delighted to learn it!
    # XXX ARE the first two used for import ? could we hide or suppress them otherwise?
    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(