__init__.py

# ##### BEGIN GPL LICENSE BLOCK #####
#
#  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
#  of the License, or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  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.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software Foundation,
#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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# ##### END GPL LICENSE BLOCK #####

# <pep8 compliant>

bl_info = {
    "name": "POVRAY-3.7",
    "author": "Campbell Barton, Silvio Falcinelli, Maurice Raybaud, "
              "Constantin Rahn, Bastien Montagne, Leonid Desyatkov",
    "version": (0, 0, 9),
    "blender": (2, 75, 0),
    "location": "Render > Engine > POV-Ray 3.7",
    "description": "Basic POV-Ray 3.7 integration for blender",
    "warning": "this script is RC",
    "wiki_url": "http://wiki.blender.org/index.php/Extensions:2.6/Py/"
                "Scripts/Render/POV-Ray",
    "category": "Render",
}

if "bpy" in locals():
    import importlib
    importlib.reload(ui)
    importlib.reload(render)
    importlib.reload(update_files)

else:
    import bpy
    import addon_utils # To use some other addons
    import nodeitems_utils #for Nodes
    from nodeitems_utils import NodeCategory, NodeItem #for Nodes
    from bpy.types import (
            AddonPreferences,
            PropertyGroup,
            #Operator,
            )
    from bpy.props import (
            StringProperty,
            BoolProperty,
            IntProperty,
            FloatProperty,
            FloatVectorProperty,
            EnumProperty,
            PointerProperty,
            CollectionProperty,
            )
    from . import (
            ui,
            render,
            update_files,
            )


def string_strip_hyphen(name):
    return name.replace("-", "")

###############################################################################
# Scene POV properties.
###############################################################################
class RenderPovSettingsScene(PropertyGroup):
    # File Options
    tempfiles_enable = BoolProperty(
            name="Enable Tempfiles",
            description="Enable the OS-Tempfiles. Otherwise set the path where"
                        " to save the files",
            default=True)
    pov_editor = BoolProperty(
            name="POV-Ray editor",
            description="Don't Close POV-Ray editor after rendering (Overriden"
                        " by /EXIT command)",
            default=False)
    deletefiles_enable = BoolProperty(
            name="Delete files",
            description="Delete files after rendering. "
                        "Doesn't work with the image",
            default=True)
    scene_name = StringProperty(
            name="Scene Name",
            description="Name of POV-Ray scene to create. Empty name will use "
                        "the name of the blend file",
            maxlen=1024)
    scene_path = StringProperty(
            name="Export scene path",
            # Bug in POV-Ray RC3
            # description="Path to directory where the exported scene "
                        # "(POV and INI) is created",  
            description="Path to directory where the files are created",
            maxlen=1024, subtype="DIR_PATH")
    renderimage_path = StringProperty(
            name="Rendered image path",
            description="Full path to directory where the rendered image is "
                        "saved",
            maxlen=1024, subtype="DIR_PATH")
    list_lf_enable = BoolProperty(
            name="LF in lists",
            description="Enable line breaks in lists (vectors and indices). "
                        "Disabled: lists are exported in one line",
            default=True)

    # Not a real pov option, just to know if we should write
    radio_enable = BoolProperty(
            name="Enable Radiosity",
            description="Enable POV-Rays radiosity calculation",
            default=False)
            
    radio_display_advanced = BoolProperty(
            name="Advanced Options",
            description="Show advanced options",
            default=False)
            
    media_enable = BoolProperty(
            name="Enable Media",
            description="Enable POV-Rays atmospheric media",
            default=False)
    media_samples = IntProperty(
            name="Samples",
            description="Number of samples taken from camera to first object "
                        "encountered along ray path for media calculation",
            min=1, max=100, default=35)

    media_color = FloatVectorProperty(
            name="Media Color", description="The atmospheric media color",
            precision=4, step=0.01, min=0, soft_max=1,
            default=(0.001, 0.001, 0.001),
            options={'ANIMATABLE'}, 
            subtype='COLOR')

    baking_enable = BoolProperty(
            name="Enable Baking",
            description="Enable POV-Rays texture baking",
            default=False)
    indentation_character = EnumProperty(
            name="Indentation",
            description="Select the indentation type",
            items=(('NONE', "None", "No indentation"),
                   ('TAB', "Tabs", "Indentation with tabs"),
                   ('SPACE', "Spaces", "Indentation with spaces")),
            default='SPACE')
    indentation_spaces = IntProperty(
            name="Quantity of spaces",
            description="The number of spaces for indentation",
            min=1, max=10, default=4)

    comments_enable = BoolProperty(
            name="Enable Comments",
            description="Add comments to pov file",
            default=True)

    # Real pov options
    command_line_switches = StringProperty(
            name="Command Line Switches",
            description="Command line switches consist of a + (plus) or - "
                        "(minus) sign, followed by one or more alphabetic "
                        "characters and possibly a numeric value",
            maxlen=500)

    antialias_enable = BoolProperty(
            name="Anti-Alias", description="Enable Anti-Aliasing",
            default=True)

    antialias_method = EnumProperty(
            name="Method",
            description="AA-sampling method. Type 1 is an adaptive, "
                        "non-recursive, super-sampling method. Type 2 is an "
                        "adaptive and recursive super-sampling method. Type 3 "
                        "is a stochastic halton based super-sampling method",
            items=(("0", "non-recursive AA", "Type 1 Sampling in POV-Ray"),
                   ("1", "recursive AA", "Type 2 Sampling in POV-Ray"),
                   ("2", "stochastic AA", "Type 3 Sampling in UberPOV")),
            default="1")
            
    antialias_confidence = FloatProperty(
            name="Antialias Confidence",
            description="how surely the computed color "
                        "of a given pixel is indeed"
                        "within the threshold error margin",
            min=0.0001, max=1.0000, default=0.9900, precision=4)
    antialias_depth = IntProperty(
            name="Antialias Depth", description="Depth of pixel for sampling",
            min=1, max=9, default=3)

    antialias_threshold = FloatProperty(
            name="Antialias Threshold", description="Tolerance for sub-pixels",
            min=0.0, max=1.0, soft_min=0.05, soft_max=0.5, default=0.03)

    jitter_enable = BoolProperty(
            name="Jitter",
            description="Enable Jittering. Adds noise into the sampling "
                        "process (it should be avoided to use jitter in "
                        "animation)",
            default=False)

    jitter_amount = FloatProperty(
            name="Jitter Amount", description="Amount of jittering",
            min=0.0, max=1.0, soft_min=0.01, soft_max=1.0, default=1.0)

    antialias_gamma = FloatProperty(
            name="Antialias Gamma",
            description="POV-Ray compares gamma-adjusted values for super "
                        "sampling. Antialias Gamma sets the Gamma before "
                        "comparison",
            min=0.0, max=5.0, soft_min=0.01, soft_max=2.5, default=2.5)

    max_trace_level = IntProperty(
            name="Max Trace Level",
            description="Number of reflections/refractions allowed on ray "
                        "path",
            min=1, max=256, default=5)

    ########################### PHOTONS #######################################
    photon_enable = BoolProperty(
            name="Photons",
            description="Enable global photons",
            default=False)

    photon_enable_count = BoolProperty(
            name="Spacing / Count",
            description="Enable count photons",
            default=False)

    photon_count = IntProperty(
            name="Count",
            description="Photons count",
            min=1, max=100000000, default=20000)
            
    photon_spacing = FloatProperty(
            name="Spacing",
            description="Average distance between photons on surfaces. half "
                        "this get four times as many surface photons",
            min=0.001, max=1.000, default=0.005,
            soft_min=0.001, soft_max=1.000, precision=3)

    photon_max_trace_level = IntProperty(
            name="Max Trace Level",
            description="Number of reflections/refractions allowed on ray "
                        "path",
            min=1, max=256, default=5)

    photon_adc_bailout = FloatProperty(
            name="ADC Bailout",
            description="The adc_bailout for photons. Use adc_bailout = "
                        "0.01 / brightest_ambient_object for good results",
            min=0.0, max=1000.0, default=0.1,
            soft_min=0.0, soft_max=1.0, precision=3)

    photon_gather_min = IntProperty(
            name="Gather Min", description="Minimum number of photons gathered"
                                           "for each point",
            min=1, max=256, default=20)

    photon_gather_max = IntProperty(
            name="Gather Max", description="Maximum number of photons gathered for each point",
            min=1, max=256, default=100)

    radio_adc_bailout = FloatProperty(
            name="ADC Bailout",
            description="The adc_bailout for radiosity rays. Use "
                        "adc_bailout = 0.01 / brightest_ambient_object for good results",
            min=0.0, max=1000.0, soft_min=0.0, soft_max=1.0, default=0.0039, precision=4)

    radio_always_sample = BoolProperty(
            name="Always Sample",
            description="Only use the data from the pretrace step and not gather "
                        "any new samples during the final radiosity pass",
            default=True)

    radio_brightness = FloatProperty(
            name="Brightness",
            description="Amount objects are brightened before being returned "
                        "upwards to the rest of the system",
            min=0.0, max=1000.0, soft_min=0.0, soft_max=10.0, default=1.0)

    radio_count = IntProperty(
            name="Ray Count",
            description="Number of rays for each new radiosity value to be calculated "
                        "(halton sequence over 1600)",
            min=1, max=10000, soft_max=1600, default=35)

    radio_error_bound = FloatProperty(
            name="Error Bound",
            description="One of the two main speed/quality tuning values, "
                        "lower values are more accurate",
            min=0.0, max=1000.0, soft_min=0.1, soft_max=10.0, default=1.8)

    radio_gray_threshold = FloatProperty(
            name="Gray Threshold",
            description="One of the two main speed/quality tuning values, "
                        "lower values are more accurate",
            min=0.0, max=1.0, soft_min=0, soft_max=1, default=0.0)

    radio_low_error_factor = FloatProperty(
            name="Low Error Factor",
            description="Just enough samples is slightly blotchy. Low error changes error "
                        "tolerance for less critical last refining pass",
            min=0.000001, max=1.0, soft_min=0.000001, soft_max=1.0, default=0.5)

    # max_sample - not available yet
    radio_media = BoolProperty(
            name="Media", description="Radiosity estimation can be affected by media",
            default=False)

    radio_minimum_reuse = FloatProperty(
            name="Minimum Reuse",
            description="Fraction of the screen width which sets the minimum radius of reuse "
                        "for each sample point (At values higher than 2% expect errors)",
            min=0.0, max=1.0, soft_min=0.1, soft_max=0.1, default=0.015, precision=3)

    radio_nearest_count = IntProperty(
            name="Nearest Count",
            description="Number of old ambient values blended together to "
                        "create a new interpolated value",
            min=1, max=20, default=5)

    radio_normal = BoolProperty(
            name="Normals", description="Radiosity estimation can be affected by normals",
            default=False)

    radio_recursion_limit = IntProperty(
            name="Recursion Limit",
            description="how many recursion levels are used to calculate "
                        "the diffuse inter-reflection",
            min=1, max=20, default=1)

    radio_pretrace_start = FloatProperty(
            name="Pretrace Start",
            description="Fraction of the screen width which sets the size of the "
                        "blocks in the mosaic preview first pass",
            min=0.01, max=1.00, soft_min=0.02, soft_max=1.0, default=0.08)

    radio_pretrace_end = FloatProperty(
            name="Pretrace End",
            description="Fraction of the screen width which sets the size of the blocks "
                        "in the mosaic preview last pass",
            min=0.000925, max=1.00, soft_min=0.01, soft_max=1.00, default=0.04, precision=3)


###############################################################################
# Material POV properties.
###############################################################################
class RenderPovSettingsMaterial(PropertyGroup):
    irid_enable = BoolProperty(
            name="Iridescence coating",
            description="Newton's thin film interference (like an oil slick on a puddle of "
                        "water or the rainbow hues of a soap bubble.)",
            default=False)

    mirror_use_IOR = BoolProperty(
            name="Correct Reflection",
            description="Use same IOR as raytrace transparency to calculate mirror reflections. "
                        "More physically correct",
            default=False)

    mirror_metallic = BoolProperty(
            name="Metallic Reflection",
            description="mirror reflections get colored as diffuse (for metallic materials)",
            default=False)

    conserve_energy = BoolProperty(
            name="Conserve Energy",
            description="Light transmitted is more correctly reduced by mirror reflections, "
                        "also the sum of diffuse and translucency gets reduced below one ",
            default=True)

    irid_amount = FloatProperty(
            name="amount",
            description="Contribution of the iridescence effect to the overall surface color. "
                        "As a rule of thumb keep to around 0.25 (25% contribution) or less, "
                        "but experiment. If the surface is coming out too white, try lowering "
                        "the diffuse and possibly the ambient values of the surface",
            min=0.0, max=1.0, soft_min=0.01, soft_max=1.0, default=0.25)

    irid_thickness = FloatProperty(
            name="thickness",
            description="A very thin film will have a high frequency of color changes while a "
                        "thick film will have large areas of color",
            min=0.0, max=1000.0, soft_min=0.1, soft_max=10.0, default=1)

    irid_turbulence = FloatProperty(
            name="turbulence", description="This parameter varies the thickness",
            min=0.0, max=10.0, soft_min=0.000, soft_max=1.0, default=0)

    interior_fade_color = FloatVectorProperty(
            name="Interior Fade Color", description="Color of filtered attenuation for transparent "
                                           "materials",
            precision=4, step=0.01, min=0.0, soft_max=1.0,
            default=(0, 0, 0), options={'ANIMATABLE'}, subtype='COLOR')

    caustics_enable = BoolProperty(
            name="Caustics",
            description="use only fake refractive caustics (default) or photon based "
                        "reflective/refractive caustics",
            default=True)

    fake_caustics = BoolProperty(
            name="Fake Caustics", description="use only (Fast) fake refractive caustics",
            default=True)

    fake_caustics_power = FloatProperty(
            name="Fake caustics power",
            description="Values typically range from 0.0 to 1.0 or higher. Zero is no caustics. "
                        "Low, non-zero values give broad hot-spots while higher values give "
                        "tighter, smaller simulated focal points",
            min=0.00, max=10.0, soft_min=0.00, soft_max=5.0, default=0.07)

    refraction_caustics = BoolProperty(
            name="Refractive Caustics", description="hotspots of light focused when going through the material",
            default=True)

    photons_dispersion = FloatProperty(
            name="Chromatic Dispersion",
            description="Light passing through will be separated according to wavelength. "
                        "This ratio of refractive indices for violet to red controls how much "
                        "the colors are spread out 1 = no dispersion, good values are 1.01 to 1.1",
            min=1.0000, max=10.000, soft_min=1.0000, soft_max=1.1000, precision=4, default=1.0000)

    photons_dispersion_samples = IntProperty(
            name="Dispersion Samples", description="Number of color-steps for dispersion",
            min=2, max=128, default=7)

    photons_reflection = BoolProperty(
            name="Reflective Photon Caustics",
            description="Use this to make your Sauron's ring ;-P",
            default=False)

    refraction_type = EnumProperty(
            items=[
                   ("1", "Fake Caustics", "use fake caustics"),
                   ("2", "Photons Caustics", "use photons for refractive caustics")],
            name="Refraction Type:",
            description="use fake caustics (fast) or true photons for refractive Caustics",
            default="1")

    ##################################CustomPOV Code############################
    replacement_text = StringProperty(
            name="Declared name:",
            description="Type the declared name in custom POV code or an external "
                        ".inc it points at. texture {} expected",
            default="")



            # NODES
        
    def use_material_nodes_callback(self, context):
        if hasattr(context.space_data, "tree_type"):
            context.space_data.tree_type = 'ObjectNodeTree'
        mat=context.object.active_material
        if mat.pov.material_use_nodes:
            mat.use_nodes=True
            tree = mat.node_tree
            tree.name=mat.name
            links = tree.links
            default = True
            if len(tree.nodes) == 2:
                o = 0
                m = 0
                for node in tree.nodes:
                    if node.type in {"OUTPUT","MATERIAL"}:
                        tree.nodes.remove(node)
                        default = True
                for node in tree.nodes:
                    if node.bl_idname == 'PovrayOutputNode':
                        o+=1
                    if node.bl_idname == 'PovrayTextureNode':
                        m+=1
                if o == 1 and m == 1:
                    default = False
            elif len(tree.nodes) == 0:
                default = True
            else:
                default = False
            if default:
                output = tree.nodes.new('PovrayOutputNode')
                output.location = 200,200
                tmap = tree.nodes.new('PovrayTextureNode')
                tmap.location = 0,200
                links.new(tmap.outputs[0],output.inputs[0])
                tmap.select = True
                tree.nodes.active = tmap                
        else:
            mat.use_nodes=False


    def use_texture_nodes_callback(self, context):
        tex=context.object.active_material.active_texture
        if tex.pov.texture_use_nodes:
            tex.use_nodes=True
            if len(tex.node_tree.nodes)==2:
                for node in tex.node_tree.nodes:
                    if node.type in {"OUTPUT","CHECKER"}:
                        tex.node_tree.nodes.remove(node)
        else:
            tex.use_nodes=False

    def node_active_callback(self, context):
        items = []
        mat=context.material
        mat.node_tree.nodes
        for node in mat.node_tree.nodes:
            node.select=False
        for node in mat.node_tree.nodes:
            if node.name==mat.pov.material_active_node:
                node.select=True
                mat.node_tree.nodes.active=node

                return node

    def node_enum_callback(self, context):
        items = []
        mat=context.material
        nodes=mat.node_tree.nodes
        for node in nodes:
            items.append(("%s"%node.name,"%s"%node.name,""))
        return items

    def pigment_normal_callback(self, context):
        render = context.scene.pov.render
        items = [("pigment", "Pigment", ""),("normal", "Normal", "")]
        if render == 'hgpovray':
            items = [("pigment", "Pigment", ""),("normal", "Normal", ""),("modulation", "Modulation", "")]
        return items

    def glow_callback(self, context):
        scene = context.scene
        ob = context.object
        ob.pov.mesh_write_as_old = ob.pov.mesh_write_as
        if scene.pov.render == 'uberpov' and ob.pov.glow:
            ob.pov.mesh_write_as = 'NONE'
        else:
            ob.pov.mesh_write_as = ob.pov.mesh_write_as_old

    material_use_nodes = BoolProperty(name="Use nodes", description="", update=use_material_nodes_callback, default=False)
    material_active_node = EnumProperty(name="Active node", description="", items=node_enum_callback, update=node_active_callback)
    preview_settings = BoolProperty(name="Preview Settings", description="",default=False)
    object_preview_transform = BoolProperty(name="Transform object", description="",default=False)
    object_preview_scale = FloatProperty(name="XYZ", min=0.5, max=2.0, default=1.0)
    object_preview_rotate = FloatVectorProperty(name="Rotate", description="", min=-180.0, max=180.0,default=(0.0,0.0,0.0), subtype='XYZ')
    object_preview_bgcontrast = FloatProperty(name="Contrast", min=0.0, max=1.0, default=0.5)    
    
        
###############################################################################
# Povray Nodes 
###############################################################################        
class PovraySocketUniversal(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketUniversal'
    bl_label = 'Povray Socket'
    value_unlimited = bpy.props.FloatProperty(default=0.0)
    value_0_1 = bpy.props.FloatProperty(min=0.0,max=1.0,default=0.0)
    value_0_10 = bpy.props.FloatProperty(min=0.0,max=10.0,default=0.0)
    value_000001_10 = bpy.props.FloatProperty(min=0.000001,max=10.0,default=0.0)
    value_1_9 = bpy.props.IntProperty(min=1,max=9,default=1)
    value_0_255 = bpy.props.IntProperty(min=0,max=255,default=0)
    percent = bpy.props.FloatProperty(min=0.0,max=100.0,default=0.0)
    def draw(self, context, layout, node, text):
        space = context.space_data
        tree = space.edit_tree
        links=tree.links
        if self.is_linked:
            value=[]
            for link in links:
                if link.from_node==node:
                    inps=link.to_node.inputs
                    for inp in inps: 
                        if inp.bl_idname=="PovraySocketFloat_0_1" and inp.is_linked:
                            prop="value_0_1"
                            if prop not in value:
                                value.append(prop)
                        if inp.bl_idname=="PovraySocketFloat_000001_10" and inp.is_linked:
                            prop="value_000001_10"
                            if prop not in value:
                                value.append(prop)
                        if inp.bl_idname=="PovraySocketFloat_0_10" and inp.is_linked:
                            prop="value_0_10"
                            if prop not in value:
                                value.append(prop)
                        if inp.bl_idname=="PovraySocketInt_1_9" and inp.is_linked:
                            prop="value_1_9"
                            if prop not in value:
                                value.append(prop)
                        if inp.bl_idname=="PovraySocketInt_0_255" and inp.is_linked:
                            prop="value_0_255"
                            if prop not in value:
                                value.append(prop)
                        if inp.bl_idname=="PovraySocketFloatUnlimited" and inp.is_linked:
                            prop="value_unlimited"
                            if prop not in value:
                                value.append(prop)
            if len(value)==1:
                layout.prop(self, "%s"%value[0], text=text)
            else:
                layout.prop(self, "percent", text="Percent")
        else:
            layout.prop(self, "percent", text=text)
    def draw_color(self, context, node):
        return (1, 0, 0, 1)

class PovraySocketFloat_0_1(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketFloat_0_1'
    bl_label = 'Povray Socket'
    default_value = bpy.props.FloatProperty(description="Input node Value_0_1",min=0,max=1,default=0)
    def draw(self, context, layout, node, text):
        if self.is_linked:
            layout.label(text)
        else:
            layout.prop(self, "default_value", text=text, slider=True)

    def draw_color(self, context, node):
        return (0.5, 0.7, 0.7, 1)

class PovraySocketFloat_0_10(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketFloat_0_10'
    bl_label = 'Povray Socket'
    default_value = bpy.props.FloatProperty(description="Input node Value_0_10",min=0,max=10,default=0)
    def draw(self, context, layout, node, text):
        if node.bl_idname == 'ShaderNormalMapNode' and node.inputs[2].is_linked:
            layout.label('')
            self.hide_value=True
        if self.is_linked:
            layout.label(text)
        else:
            layout.prop(self, "default_value", text=text, slider=True)
    def draw_color(self, context, node):
        return (0.65, 0.65, 0.65, 1)

class PovraySocketFloat_10(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketFloat_10'
    bl_label = 'Povray Socket'
    default_value = bpy.props.FloatProperty(description="Input node Value_10",min=-10,max=10,default=0)
    def draw(self, context, layout, node, text):
        if node.bl_idname == 'ShaderNormalMapNode' and node.inputs[2].is_linked:
            layout.label('')
            self.hide_value=True
        if self.is_linked:
            layout.label(text)
        else:
            layout.prop(self, "default_value", text=text, slider=True)
    def draw_color(self, context, node):
        return (0.65, 0.65, 0.65, 1)

class PovraySocketFloatPositive(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketFloatPositive'
    bl_label = 'Povray Socket'
    default_value = bpy.props.FloatProperty(description="Input Node Value Positive", min=0.0, default=0)
    def draw(self, context, layout, node, text):
        if self.is_linked:
            layout.label(text)
        else:
            layout.prop(self, "default_value", text=text, slider=True)
    def draw_color(self, context, node):
        return (0.045, 0.005, 0.136, 1)

class PovraySocketFloat_000001_10(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketFloat_000001_10'
    bl_label = 'Povray Socket'
    default_value = bpy.props.FloatProperty(min=0.000001,max=10,default=0.000001)
    def draw(self, context, layout, node, text):
        if self.is_output or self.is_linked:
            layout.label(text)
        else:
            layout.prop(self, "default_value", text=text, slider=True)
    def draw_color(self, context, node):
        return (1, 0, 0, 1)

class PovraySocketFloatUnlimited(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketFloatUnlimited'
    bl_label = 'Povray Socket'
    default_value = bpy.props.FloatProperty(default = 0.0)
    def draw(self, context, layout, node, text):
        if self.is_linked:
            layout.label(text)
        else:
            layout.prop(self, "default_value", text=text, slider=True)
    def draw_color(self, context, node):
        return (0.7, 0.7, 1, 1)

class PovraySocketInt_1_9(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketInt_1_9'
    bl_label = 'Povray Socket'
    default_value = bpy.props.IntProperty(description="Input node Value_1_9",min=1,max=9,default=6)
    def draw(self, context, layout, node, text):
        if self.is_linked:
            layout.label(text)
        else:
            layout.prop(self, "default_value", text=text)
    def draw_color(self, context, node):
        return (1, 0.7, 0.7, 1)

class PovraySocketInt_0_256(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketInt_0_256'
    bl_label = 'Povray Socket'
    default_value = bpy.props.IntProperty(min=0,max=255,default=0)
    def draw(self, context, layout, node, text):
        if self.is_linked:
            layout.label(text)
        else:
            layout.prop(self, "default_value", text=text)
    def draw_color(self, context, node):
        return (0.5, 0.5, 0.5, 1)


class PovraySocketPattern(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketPattern'
    bl_label = 'Povray Socket'

    default_value = bpy.props.EnumProperty(
            name="Pattern",
            description="Select the pattern",
            items=(('boxed', "Boxed", ""),('brick', "Brick", ""),('cells', "Cells", ""), ('checker', "Checker", ""),
                   ('granite', "Granite", ""),('leopard', "Leopard", ""),('marble', "Marble", ""),
                   ('onion', "Onion", ""),('planar', "Planar", ""), ('quilted', "Quilted", ""),
                   ('ripples', "Ripples", ""),  ('radial', "Radial", ""),('spherical', "Spherical", ""),
                   ('spotted', "Spotted", ""), ('waves', "Waves", ""), ('wood', "Wood", ""),
                   ('wrinkles', "Wrinkles", "")),
            default='granite')

    def draw(self, context, layout, node, text):
        if self.is_output or self.is_linked:
            layout.label("Pattern")
        else:
            layout.prop(self, "default_value", text=text)

    def draw_color(self, context, node):
        return (1, 1, 1, 1)

class PovraySocketColor(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketColor'
    bl_label = 'Povray Socket'

    default_value = bpy.props.FloatVectorProperty(
            precision=4, step=0.01, min=0, soft_max=1,
            default=(0.0, 0.0, 0.0), options={'ANIMATABLE'}, subtype='COLOR')

    def draw(self, context, layout, node, text):
        if self.is_output or self.is_linked:
            layout.label(text)
        else:
            layout.prop(self, "default_value", text=text)

    def draw_color(self, context, node):
        return (1, 1, 0, 1)

class PovraySocketColorRGBFT(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketColorRGBFT'
    bl_label = 'Povray Socket'

    default_value = bpy.props.FloatVectorProperty(
            precision=4, step=0.01, min=0, soft_max=1,
            default=(0.0, 0.0, 0.0), options={'ANIMATABLE'}, subtype='COLOR')
    f = bpy.props.FloatProperty(default = 0.0,min=0.0,max=1.0)
    t = bpy.props.FloatProperty(default = 0.0,min=0.0,max=1.0)
    def draw(self, context, layout, node, text):
        if self.is_output or self.is_linked:
            layout.label(text)
        else:
            layout.prop(self, "default_value", text=text)

    def draw_color(self, context, node):
        return (1, 1, 0, 1)

class PovraySocketTexture(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketTexture'
    bl_label = 'Povray Socket'
    default_value = bpy.props.IntProperty()
    def draw(self, context, layout, node, text):
        layout.label(text)

    def draw_color(self, context, node):
        return (0, 1, 0, 1)



class PovraySocketTransform(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketTransform'
    bl_label = 'Povray Socket'
    default_value = bpy.props.IntProperty(min=0,max=255,default=0)
    def draw(self, context, layout, node, text):
        layout.label(text)

    def draw_color(self, context, node):
        return (99/255, 99/255, 199/255, 1)

class PovraySocketNormal(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketNormal'
    bl_label = 'Povray Socket'
    default_value = bpy.props.IntProperty(min=0,max=255,default=0)
    def draw(self, context, layout, node, text):
        layout.label(text)

    def draw_color(self, context, node):
        return (0.65, 0.65, 0.65, 1)

class PovraySocketSlope(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketSlope'
    bl_label = 'Povray Socket'
    default_value = bpy.props.FloatProperty(min = 0.0, max = 1.0)
    height = bpy.props.FloatProperty(min = 0.0, max = 10.0)
    slope = bpy.props.FloatProperty(min = -10.0, max = 10.0)
    def draw(self, context, layout, node, text):
        if self.is_output or self.is_linked:
            layout.label(text)
        else:
            layout.prop(self,'default_value',text='')
            layout.prop(self,'height',text='')
            layout.prop(self,'slope',text='')
    def draw_color(self, context, node):
        return (0, 0, 0, 1)

class PovraySocketMap(bpy.types.NodeSocket):
    bl_idname = 'PovraySocketMap'
    bl_label = 'Povray Socket'
    default_value = bpy.props.StringProperty()
    def draw(self, context, layout, node, text):
        layout.label(text)
    def draw_color(self, context, node):
        return (0.2, 0, 0.2, 1)

class PovrayShaderNodeCategory(NodeCategory):
    @classmethod
    def poll(cls, context):
        return context.space_data.tree_type == 'ObjectNodeTree'

class PovrayTextureNodeCategory(NodeCategory):
    @classmethod
    def poll(cls, context):
        return context.space_data.tree_type == 'TextureNodeTree'

class PovraySceneNodeCategory(NodeCategory):
    @classmethod
    def poll(cls, context):
        return context.space_data.tree_type == 'CompositorNodeTree'

node_categories = [

    PovrayShaderNodeCategory("SHADEROUTPUT", "Output", items=[
        NodeItem("PovrayOutputNode"),
        ]),

    PovrayShaderNodeCategory("SIMPLE", "Simple texture", items=[
        NodeItem("PovrayTextureNode"),
        ]),

    PovrayShaderNodeCategory("MAPS", "Maps", items=[
        NodeItem("PovrayBumpMapNode"),
        NodeItem("PovrayColorImageNode"),
        NodeItem("ShaderNormalMapNode"),
        NodeItem("PovraySlopeNode"),
        NodeItem("ShaderTextureMapNode"),
        NodeItem("ShaderNodeValToRGB"),
        ]),

    PovrayShaderNodeCategory("OTHER", "Other patterns", items=[
        NodeItem("PovrayImagePatternNode"),
        NodeItem("ShaderPatternNode"),
        ]),

    PovrayShaderNodeCategory("COLOR", "Color", items=[
        NodeItem("PovrayPigmentNode"),
        ]),

    PovrayShaderNodeCategory("TRANSFORM", "Transform", items=[
        NodeItem("PovrayMappingNode"),
        NodeItem("PovrayMultiplyNode"),
        NodeItem("PovrayModifierNode"),
        NodeItem("PovrayTransformNode"),
        NodeItem("PovrayValueNode"),
        ]),

    PovrayShaderNodeCategory("FINISH", "Finish", items=[
        NodeItem("PovrayFinishNode"),
        NodeItem("PovrayDiffuseNode"),
        NodeItem("PovraySpecularNode"),
        NodeItem("PovrayPhongNode"),
        NodeItem("PovrayAmbientNode"),
        NodeItem("PovrayMirrorNode"),
        NodeItem("PovrayIridescenceNode"),
        NodeItem("PovraySubsurfaceNode"),
        ]), 

    PovrayShaderNodeCategory("CYCLES", "Cycles", items=[
        NodeItem("ShaderNodeAddShader"),
        NodeItem("ShaderNodeAmbientOcclusion"),
        NodeItem("ShaderNodeAttribute"),
        NodeItem("ShaderNodeBackground"),
        NodeItem("ShaderNodeBlackbody"),
        NodeItem("ShaderNodeBrightContrast"),
        NodeItem("ShaderNodeBsdfAnisotropic"),
        NodeItem("ShaderNodeBsdfDiffuse"),
        NodeItem("ShaderNodeBsdfGlass"),
        NodeItem("ShaderNodeBsdfGlossy"),
        NodeItem("ShaderNodeBsdfHair"),
        NodeItem("ShaderNodeBsdfRefraction"),
        NodeItem("ShaderNodeBsdfToon"),
        NodeItem("ShaderNodeBsdfTranslucent"),
        NodeItem("ShaderNodeBsdfTransparent"),
        NodeItem("ShaderNodeBsdfVelvet"),
        NodeItem("ShaderNodeBump"),
        NodeItem("ShaderNodeCameraData"),
        NodeItem("ShaderNodeCombineHSV"),
        NodeItem("ShaderNodeCombineRGB"),
        NodeItem("ShaderNodeCombineXYZ"),
        NodeItem("ShaderNodeEmission"),
        NodeItem("ShaderNodeExtendedMaterial"),
        NodeItem("ShaderNodeFresnel"),
        NodeItem("ShaderNodeGamma"),
        NodeItem("ShaderNodeGeometry"),
        NodeItem("ShaderNodeGroup"),
        NodeItem("ShaderNodeHairInfo"),
        NodeItem("ShaderNodeHoldout"),
        NodeItem("ShaderNodeHueSaturation"),
        NodeItem("ShaderNodeInvert"),
        NodeItem("ShaderNodeLampData"),
        NodeItem("ShaderNodeLayerWeight"),
        NodeItem("ShaderNodeLightFalloff"),
        NodeItem("ShaderNodeLightPath"),
        NodeItem("ShaderNodeMapping"),
        NodeItem("ShaderNodeMaterial"),
        NodeItem("ShaderNodeMath"),
        NodeItem("ShaderNodeMixRGB"),
        NodeItem("ShaderNodeMixShader"),
        NodeItem("ShaderNodeNewGeometry"),
        NodeItem("ShaderNodeNormal"),
        NodeItem("ShaderNodeNormalMap"),
        NodeItem("ShaderNodeObjectInfo"),
        NodeItem("ShaderNodeOutput"),
        NodeItem("ShaderNodeOutputLamp"),
        NodeItem("ShaderNodeOutputLineStyle"),
        NodeItem("ShaderNodeOutputMaterial"),
        NodeItem("ShaderNodeOutputWorld"),
        NodeItem("ShaderNodeParticleInfo"),
        NodeItem("ShaderNodeRGB"),
        NodeItem("ShaderNodeRGBCurve"),
        NodeItem("ShaderNodeRGBToBW"),
        NodeItem("ShaderNodeScript"),
        NodeItem("ShaderNodeSeparateHSV"),
        NodeItem("ShaderNodeSeparateRGB"),
        NodeItem("ShaderNodeSeparateXYZ"),
        NodeItem("ShaderNodeSqueeze"),
        NodeItem("ShaderNodeSubsurfaceScattering"),
        NodeItem("ShaderNodeTangent"),
        NodeItem("ShaderNodeTexBrick"),
        NodeItem("ShaderNodeTexChecker"),
        NodeItem("ShaderNodeTexCoord"),
        NodeItem("ShaderNodeTexEnvironment"),
        NodeItem("ShaderNodeTexGradient"),
        NodeItem("ShaderNodeTexImage"),
        NodeItem("ShaderNodeTexMagic"),
        NodeItem("ShaderNodeTexMusgrave"),
        NodeItem("ShaderNodeTexNoise"),
        NodeItem("ShaderNodeTexPointDensity"),
        NodeItem("ShaderNodeTexSky"),
        NodeItem("ShaderNodeTexVoronoi"),
        NodeItem("ShaderNodeTexWave"),
        NodeItem("ShaderNodeTexture"),
        NodeItem("ShaderNodeUVAlongStroke"),
        NodeItem("ShaderNodeUVMap"),
        NodeItem("ShaderNodeValToRGB"),
        NodeItem("ShaderNodeValue"),
        NodeItem("ShaderNodeVectorCurve"),
        NodeItem("ShaderNodeVectorMath"),
        NodeItem("ShaderNodeVectorTransform"),
        NodeItem("ShaderNodeVolumeAbsorption"),
        NodeItem("ShaderNodeVolumeScatter"),
        NodeItem("ShaderNodeWavelength"),
        NodeItem("ShaderNodeWireframe"),
        ]),

    PovrayTextureNodeCategory("TEXTUREOUTPUT", "Output", items=[
        NodeItem("TextureNodeValToRGB"),
        NodeItem("TextureOutputNode"),
        ]),

    PovraySceneNodeCategory("ISOSURFACE", "Isosurface", items=[
        NodeItem("IsoPropsNode"),
        ]),

    PovraySceneNodeCategory("FOG", "Fog", items=[
        NodeItem("PovrayFogNode"),

        ]),
    ]
############### end nodes
    
###############################################################################
# Texture POV properties.
###############################################################################
class RenderPovSettingsTexture(PropertyGroup):