__init__.py

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#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License
#  as published by the Free Software Foundation; either version 2
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#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
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#  along with this program; if not, write to the Free Software Foundation,
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# ##### END GPL LICENSE BLOCK #####

# <pep8 compliant>

"""Import, export and render to POV engines.

These engines can be POV-Ray or Uberpov but others too, since POV is a
Scene Description Language. The script has been split in as few files
as possible :

___init__.py :
    Initialize properties

update_files.py
    Update new variables to values from older API. This file needs an update

ui.py :
    Provide property buttons for the user to set up the variables

primitives.py :
    Display some POV native primitives in 3D view for input and output

shading.py
    Translate shading properties to declared textures at the top of a pov file

nodes.py
    Translate node trees to the pov file

df3.py
    Render smoke to *.df3 files

render.py :
    Translate geometry and UI properties (Blender and POV native) to the POV file


Along these essential files also coexist a few additional libraries to help make
Blender stand up to other POV IDEs such as povwin or QTPOV
    presets :
        Material (sss)
            apple.py ; chicken.py ; cream.py ; Ketchup.py ; marble.py ;
            potato.py ; skim_milk.py ; skin1.py ; skin2.py ; whole_milk.py
        Radiosity
            01_Debug.py ; 02_Fast.py ; 03_Normal.py ; 04_Two_Bounces.py ;
            05_Final.py ; 06_Outdoor_Low_Quality.py ; 07_Outdoor_High_Quality.py ;
            08_Outdoor(Sun)Light.py ; 09_Indoor_Low_Quality.py ;
            10_Indoor_High_Quality.py ;
        World
            01_Clear_Blue_Sky.py ; 02_Partly_Hazy_Sky.py ; 03_Overcast_Sky.py ;
            04_Cartoony_Sky.py ; 05_Under_Water.py ;
        Light
            01_(4800K)_Direct_Sun.py ;
            02_(5400K)_High_Noon_Sun.py ;
            03_(6000K)_Daylight_Window.py ;
            04_(6000K)_2500W_HMI_(Halogen_Metal_Iodide).py ;
            05_(4000K)_100W_Metal_Halide.py ;
            06_(3200K)_100W_Quartz_Halogen.py ;
            07_(2850K)_100w_Tungsten.py ;
            08_(2600K)_40w_Tungsten.py ;
            09_(5000K)_75W_Full_Spectrum_Fluorescent_T12.py ;
            10_(4300K)_40W_Vintage_Fluorescent_T12.py ;
            11_(5000K)_18W_Standard_Fluorescent_T8 ;
            12_(4200K)_18W_Cool_White_Fluorescent_T8.py ;
            13_(3000K)_18W_Warm_Fluorescent_T8.py ;
            14_(6500K)_54W_Grow_Light_Fluorescent_T5-HO.py ;
            15_(3200K)_40W_Induction_Fluorescent.py ;
            16_(2100K)_150W_High_Pressure_Sodium.py ;
            17_(1700K)_135W_Low_Pressure_Sodium.py ;
            18_(6800K)_175W_Mercury_Vapor.py ;
            19_(5200K)_700W_Carbon_Arc.py ;
            20_(6500K)_15W_LED_Spot.py ;
            21_(2700K)_7W_OLED_Panel.py ;
            22_(30000K)_40W_Black_Light_Fluorescent.py ;
            23_(30000K)_40W_Black_Light_Bulb.py;
            24_(1850K)_Candle.py
    templates:
        abyss.pov ; biscuit.pov ; bsp_Tango.pov ; chess2.pov ;
        cornell.pov ; diffract.pov ; diffuse_back.pov ; float5 ;
        gamma_showcase.pov ; grenadine.pov ; isocacti.pov ;
        mediasky.pov ; patio-radio.pov ; subsurface.pov ; wallstucco.pov
"""


bl_info = {
    "name": "Persistence of Vision",
    "author": "Campbell Barton, "
    "Maurice Raybaud, "
    "Leonid Desyatkov, "
    "Bastien Montagne, "
    "Constantin Rahn, "
    "Silvio Falcinelli",
    "version": (0, 1, 1),
    "blender": (2, 81, 0),
    "location": "Render Properties > Render Engine > Persistence of Vision",
    "description": "Persistence of Vision integration for blender",
    "doc_url": "{BLENDER_MANUAL_URL}/addons/render/povray.html",
    "category": "Render",
    "warning": "Under active development, seeking co-maintainer(s)",
}

if "bpy" in locals():
    import importlib

    importlib.reload(ui)
    importlib.reload(nodes)
    importlib.reload(render)
    importlib.reload(shading)
    importlib.reload(primitives)
    importlib.reload(update_files)

else:
    import bpy
    from bpy.utils import register_class, unregister_class
    # import addon_utils  # To use some other addons
    import nodeitems_utils  # for Nodes
    from nodeitems_utils import NodeCategory, NodeItem  # for Nodes
    from bl_operators.presets import AddPresetBase
    from bpy.types import (
        AddonPreferences,
        PropertyGroup,
        NodeSocket,
    )

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


def string_strip_hyphen(name):

    """Remove hyphen characters from a string to avoid POV errors"""

    return name.replace("-", "")

def pov_context_tex_datablock(context):
    """Texture context type recreated as deprecated in blender 2.8"""

    idblock = context.brush
    if idblock and context.scene.texture_context == 'OTHER':
        return idblock

    # idblock = bpy.context.active_object.active_material
    idblock = context.view_layer.objects.active.active_material
    if idblock and context.scene.texture_context == 'MATERIAL':
        return idblock

    idblock = context.world
    if idblock and context.scene.texture_context == 'WORLD':
        return idblock

    idblock = context.light
    if idblock and context.scene.texture_context == 'LIGHT':
        return idblock

    if context.particle_system and context.scene.texture_context == 'PARTICLES':
        idblock = context.particle_system.settings

    return idblock

    idblock = context.line_style
    if idblock and context.scene.texture_context == 'LINESTYLE':
        return idblock

def brush_texture_update(self, context):

    """Brush texture rolldown must show active slot texture props"""
    idblock = pov_context_tex_datablock(context)
    if idblock is not None:
        #mat = context.view_layer.objects.active.active_material
        idblock = pov_context_tex_datablock(context)
        slot = idblock.pov_texture_slots[idblock.pov.active_texture_index]
        tex = slot.texture

        if tex:
            # Switch paint brush to active texture so slot and settings remain contextual
            bpy.context.tool_settings.image_paint.brush.texture = bpy.data.textures[tex]
            bpy.context.tool_settings.image_paint.brush.mask_texture = bpy.data.textures[tex]