Brecht Van Lommel
78390f7724
Best to give its actual name so it's clear that the Principled BSDF does not have a diffuse color exactly, and does not have an alpha component. Also image textures use UVs by default, so avoid creating a texture coordinate node for that.
629 lines
23 KiB
Python
629 lines
23 KiB
Python
# ##### BEGIN GPL LICENSE BLOCK #####
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ##### END GPL LICENSE BLOCK #####
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# <pep8 compliant>
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import bpy
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from mathutils import Color, Vector
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__all__ = (
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"PrincipledBSDFWrapper",
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)
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def _set_check(func):
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from functools import wraps
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@wraps(func)
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def wrapper(self, *args, **kwargs):
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if self.is_readonly:
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assert(not "Trying to set value to read-only shader!")
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return
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return func(self, *args, **kwargs)
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return wrapper
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def rgb_to_rgba(rgb):
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return list(rgb) + [1.0]
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def rgba_to_rgb(rgba):
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return Color((rgba[0], rgba[1], rgba[2]))
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class ShaderWrapper():
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"""
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Base class with minimal common ground for all types of shader interfaces we may want/need to implement.
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"""
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# The two mandatory nodes any children class should support.
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NODES_LIST = (
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"node_out",
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"_node_texcoords",
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)
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__slots__ = (
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"is_readonly",
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"material",
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"_textures",
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"_grid_locations",
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*NODES_LIST,
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)
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_col_size = 300
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_row_size = 300
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def _grid_to_location(self, x, y, dst_node=None, ref_node=None):
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if ref_node is not None: # x and y are relative to this node location.
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nx = round(ref_node.location.x / self._col_size)
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ny = round(ref_node.location.y / self._row_size)
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x += nx
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y += ny
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loc = None
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while True:
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loc = (x * self._col_size, y * self._row_size)
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if loc not in self._grid_locations:
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break
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loc = (x * self._col_size, (y - 1) * self._row_size)
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if loc not in self._grid_locations:
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break
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loc = (x * self._col_size, (y - 2) * self._row_size)
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if loc not in self._grid_locations:
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break
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x -= 1
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self._grid_locations.add(loc)
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if dst_node is not None:
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dst_node.location = loc
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dst_node.width = min(dst_node.width, self._col_size - 20)
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return loc
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def __init__(self, material, is_readonly=True):
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self.is_readonly = is_readonly
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self.material = material
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self.update()
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def update(self): # Should be re-implemented by children classes...
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for node in self.NODES_LIST:
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setattr(self, node, None)
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self._textures = {}
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self._grid_locations = set()
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def use_nodes_get(self):
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return self.material.use_nodes
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@_set_check
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def use_nodes_set(self, val):
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self.material.use_nodes = val
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self.update()
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use_nodes = property(use_nodes_get, use_nodes_set)
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def node_texcoords_get(self):
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if not self.use_nodes:
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return None
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if self._node_texcoords is None:
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for n in self.material.node_tree.nodes:
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if n.bl_idname == 'ShaderNodeTexCoord':
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self._node_texcoords = n
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self._grid_to_location(0, 0, ref_node=n)
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break
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if self._node_texcoords is None and not self.is_readonly:
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tree = self.material.node_tree
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nodes = tree.nodes
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links = tree.links
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node_texcoords = nodes.new(type='ShaderNodeTexCoord')
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node_texcoords.label = "Texture Coords"
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self._grid_to_location(-5, 1, dst_node=node_texcoords)
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self._node_texcoords = node_texcoords
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return self._node_texcoords
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node_texcoords = property(node_texcoords_get)
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class PrincipledBSDFWrapper(ShaderWrapper):
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"""
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Hard coded shader setup, based in Principled BSDF.
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Should cover most common cases on import, and gives a basic nodal shaders support for export.
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Supports basic: diffuse/spec/reflect/transparency/normal, with texturing.
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"""
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NODES_LIST = (
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"node_out",
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"node_principled_bsdf",
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"_node_normalmap",
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"_node_texcoords",
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)
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__slots__ = (
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"is_readonly",
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"material",
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*NODES_LIST,
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)
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NODES_LIST = ShaderWrapper.NODES_LIST + NODES_LIST
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def __init__(self, material, is_readonly=True):
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super(PrincipledBSDFWrapper, self).__init__(material, is_readonly)
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def update(self):
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super(PrincipledBSDFWrapper, self).update()
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if not self.use_nodes:
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return
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tree = self.material.node_tree
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nodes = tree.nodes
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links = tree.links
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# --------------------------------------------------------------------
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# Main output and shader.
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node_out = None
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node_principled = None
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for n in nodes:
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if n.bl_idname == 'ShaderNodeOutputMaterial' and n.inputs[0].is_linked:
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node_out = n
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node_principled = n.inputs[0].links[0].from_node
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elif n.bl_idname == 'ShaderNodeBsdfPrincipled' and n.outputs[0].is_linked:
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node_principled = n
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for lnk in n.outputs[0].links:
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node_out = lnk.to_node
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if node_out.bl_idname == 'ShaderNodeOutputMaterial':
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break
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if (
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node_out is not None and node_principled is not None and
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node_out.bl_idname == 'ShaderNodeOutputMaterial' and
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node_principled.bl_idname == 'ShaderNodeBsdfPrincipled'
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):
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break
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node_out = node_principled = None # Could not find a valid pair, let's try again
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if node_out is not None:
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self._grid_to_location(0, 0, ref_node=node_out)
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elif not self.is_readonly:
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node_out = nodes.new(type='ShaderNodeOutputMaterial')
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node_out.label = "Material Out"
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node_out.target = 'ALL'
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self._grid_to_location(1, 1, dst_node=node_out)
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self.node_out = node_out
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if node_principled is not None:
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self._grid_to_location(0, 0, ref_node=node_principled)
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elif not self.is_readonly:
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node_principled = nodes.new(type='ShaderNodeBsdfPrincipled')
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node_principled.label = "Principled BSDF"
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self._grid_to_location(0, 1, dst_node=node_principled)
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# Link
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links.new(node_principled.outputs["BSDF"], self.node_out.inputs["Surface"])
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self.node_principled_bsdf = node_principled
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# --------------------------------------------------------------------
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# Normal Map, lazy initialization...
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self._node_normalmap = None
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# --------------------------------------------------------------------
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# Tex Coords, lazy initialization...
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self._node_texcoords = None
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def node_normalmap_get(self):
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if not self.use_nodes:
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return None
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if self._node_normalmap is None and self.node_principled_bsdf is not None:
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node_principled = self.node_principled_bsdf
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if node_principled.inputs["Normal"].is_linked:
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node_normalmap = node_principled.inputs["Normal"].links[0].from_node
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if node_normalmap.bl_idname == 'ShaderNodeNormalMap':
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self._node_normalmap = node_normalmap
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self._grid_to_location(0, 0, ref_node=node_normalmap)
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if self._node_normalmap is None and not self.is_readonly:
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node_normalmap = nodes.new(type='ShaderNodeNormalMap')
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node_normalmap.label = "Normal/Map"
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self._grid_to_location(-1, -2, dst_node=node_normalmap, ref_node=node_principled)
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# Link
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links.new(node_normalmap.outputs["Normal"], node_principled.inputs["Normal"])
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return self._node_normalmap
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node_normalmap = property(node_normalmap_get)
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# --------------------------------------------------------------------
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# Base Color.
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def base_color_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return self.material.diffuse_color
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return rgba_to_rgb(self.node_principled_bsdf.inputs["Base Color"].default_value)
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@_set_check
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def base_color_set(self, color):
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self.material.diffuse_color = color
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if self.use_nodes and self.node_principled_bsdf is not None:
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self.node_principled_bsdf.inputs["Base Color"].default_value = rgb_to_rgba(color)
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base_color = property(base_color_get, base_color_set)
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def base_color_texture_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return None
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return ShaderImageTextureWrapper(
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self, self.node_principled_bsdf,
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self.node_principled_bsdf.inputs["Base Color"],
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grid_row_diff=1,
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)
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base_color_texture = property(base_color_texture_get)
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# --------------------------------------------------------------------
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# Specular.
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def specular_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return self.material.specular_intensity
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return self.node_principled_bsdf.inputs["Specular"].default_value
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@_set_check
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def specular_set(self, value):
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self.material.specular_intensity = value
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if self.use_nodes and self.node_principled_bsdf is not None:
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self.node_principled_bsdf.inputs["Specular"].default_value = value
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specular = property(specular_get, specular_set)
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def specular_tint_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return 0.0
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return rgba_to_rgb(self.node_principled_bsdf.inputs["Specular Tint"].default_value)
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@_set_check
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def specular_tint_set(self, value):
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if self.use_nodes and self.node_principled_bsdf is not None:
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self.node_principled_bsdf.inputs["Specular Tint"].default_value = rgb_to_rgba(value)
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specular_tint = property(specular_tint_get, specular_tint_set)
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# Will only be used as gray-scale one...
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def specular_texture_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return None
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return ShaderImageTextureWrapper(
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self, self.node_principled_bsdf,
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self.node_principled_bsdf.inputs["Specular"],
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grid_row_diff=0,
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)
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specular_texture = property(specular_texture_get)
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# --------------------------------------------------------------------
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# Roughness (also sort of inverse of specular hardness...).
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def roughness_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return self.material.roughness
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return self.node_principled_bsdf.inputs["Roughness"].default_value
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@_set_check
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def roughness_set(self, value):
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self.material.roughness = value
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if self.use_nodes and self.node_principled_bsdf is not None:
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self.node_principled_bsdf.inputs["Roughness"].default_value = value
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roughness = property(roughness_get, roughness_set)
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# Will only be used as gray-scale one...
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def roughness_texture_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return None
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return ShaderImageTextureWrapper(
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self, self.node_principled_bsdf,
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self.node_principled_bsdf.inputs["Roughness"],
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grid_row_diff=0,
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)
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roughness_texture = property(roughness_texture_get)
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# --------------------------------------------------------------------
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# Metallic (a.k.a reflection, mirror).
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def metallic_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return self.material.metallic
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return self.node_principled_bsdf.inputs["Metallic"].default_value
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@_set_check
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def metallic_set(self, value):
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self.material.metallic = value
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if self.use_nodes and self.node_principled_bsdf is not None:
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self.node_principled_bsdf.inputs["Metallic"].default_value = value
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metallic = property(metallic_get, metallic_set)
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# Will only be used as gray-scale one...
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def metallic_texture_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return None
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return ShaderImageTextureWrapper(
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self, self.node_principled_bsdf,
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self.node_principled_bsdf.inputs["Metallic"],
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grid_row_diff=0,
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)
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metallic_texture = property(metallic_texture_get)
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# --------------------------------------------------------------------
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# Transparency settings.
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def ior_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return 1.0
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return self.node_principled_bsdf.inputs["IOR"].default_value
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@_set_check
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def ior_set(self, value):
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if self.use_nodes and self.node_principled_bsdf is not None:
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self.node_principled_bsdf.inputs["IOR"].default_value = value
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ior = property(ior_get, ior_set)
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# Will only be used as gray-scale one...
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def ior_texture_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return None
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return ShaderImageTextureWrapper(
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self, self.node_principled_bsdf,
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self.node_principled_bsdf.inputs["IOR"],
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grid_row_diff=-1,
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)
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ior_texture = property(ior_texture_get)
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def transmission_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return 0.0
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return self.node_principled_bsdf.inputs["Transmission"].default_value
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@_set_check
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def transmission_set(self, value):
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if self.use_nodes and self.node_principled_bsdf is not None:
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self.node_principled_bsdf.inputs["Transmission"].default_value = value
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transmission = property(transmission_get, transmission_set)
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# Will only be used as gray-scale one...
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def transmission_texture_get(self):
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if not self.use_nodes or self.node_principled_bsdf is None:
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return None
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return ShaderImageTextureWrapper(
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self, self.node_principled_bsdf,
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self.node_principled_bsdf.inputs["Transmission"],
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grid_row_diff=-1,
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)
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transmission_texture = property(transmission_texture_get)
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# TODO: Do we need more complex handling for alpha (allowing masking and such)?
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# Would need extra mixing nodes onto Base Color maybe, or even its own shading chain...
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# --------------------------------------------------------------------
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# Normal map.
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def normalmap_strength_get(self):
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if not self.use_nodes or self.node_normalmap is None:
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return 0.0
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return self.node_normalmap.inputs["Strength"].default_value
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@_set_check
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def normalmap_strength_set(self, value):
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if self.use_nodes and self.node_normalmap is not None:
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self.node_normalmap.inputs["Strength"].default_value = value
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normalmap_strength = property(normalmap_strength_get, normalmap_strength_set)
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def normalmap_texture_get(self):
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if not self.use_nodes or self.node_normalmap is None:
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return None
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return ShaderImageTextureWrapper(
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self, self.node_normalmap,
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self.node_normalmap.inputs["Color"],
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grid_row_diff=-2,
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)
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normalmap_texture = property(normalmap_texture_get)
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class ShaderImageTextureWrapper():
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"""
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Generic 'image texture'-like wrapper, handling image node, some mapping (texture coordinates transformations),
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and texture coordinates source.
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"""
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# Note: this class assumes we are using nodes, otherwise it should never be used...
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NODES_LIST = (
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"node_dst",
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"socket_dst",
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"_node_image",
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"_node_mapping",
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)
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__slots__ = (
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"owner_shader",
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"is_readonly",
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"grid_row_diff",
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"use_alpha",
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*NODES_LIST,
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)
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def __new__(cls, owner_shader: ShaderWrapper, node_dst, socket_dst, *args, **kwargs):
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instance = owner_shader._textures.get((node_dst, socket_dst), None)
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if instance is not None:
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return instance
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instance = super(ShaderImageTextureWrapper, cls).__new__(cls)
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owner_shader._textures[(node_dst, socket_dst)] = instance
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return instance
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def __init__(self, owner_shader: ShaderWrapper, node_dst, socket_dst, grid_row_diff=0, use_alpha=False):
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self.owner_shader = owner_shader
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self.is_readonly = owner_shader.is_readonly
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self.node_dst = node_dst
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self.socket_dst = socket_dst
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self.grid_row_diff = grid_row_diff
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self.use_alpha = use_alpha
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self._node_image = None
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self._node_mapping = None
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tree = node_dst.id_data
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nodes = tree.nodes
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links = tree.links
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if socket_dst.is_linked:
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self._node_image = socket_dst.links[0].from_node
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if self.node_image is not None:
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socket_dst = self.node_image.inputs["Vector"]
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if socket_dst.is_linked:
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from_node = socket_dst.links[0].from_node
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if from_node.bl_idname == 'ShaderNodeMapping':
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self._node_mapping = from_node
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# --------------------------------------------------------------------
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# Image.
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def node_image_get(self):
|
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if self._node_image is None:
|
|
if self.socket_dst.is_linked:
|
|
node_image = self.socket_dst.links[0].from_node
|
|
if node_image.bl_idname == 'ShaderNodeTexImage':
|
|
self._node_image = node_image
|
|
self.owner_shader._grid_to_location(0, 0, ref_node=node_image)
|
|
if self._node_image is None and not self.is_readonly:
|
|
tree = self.owner_shader.material.node_tree
|
|
|
|
node_image = tree.nodes.new(type='ShaderNodeTexImage')
|
|
self.owner_shader._grid_to_location(-1, 0 + self.grid_row_diff, dst_node=node_image, ref_node=self.node_dst)
|
|
|
|
tree.links.new(node_image.outputs["Alpha" if self.use_alpha else "Color"], self.socket_dst)
|
|
|
|
self._node_image = node_image
|
|
return self._node_image
|
|
node_image = property(node_image_get)
|
|
|
|
def image_get(self):
|
|
return self.node_image.image if self.node_image is not None else None
|
|
|
|
@_set_check
|
|
def image_set(self, image):
|
|
self.node_image.image = image
|
|
image = property(image_get, image_set)
|
|
|
|
def projection_get(self):
|
|
return self.node_image.projection if self.node_image is not None else 'FLAT'
|
|
|
|
@_set_check
|
|
def projection_set(self, projection):
|
|
self.node_image.projection = projection
|
|
projection = property(projection_get, projection_set)
|
|
|
|
def texcoords_get(self):
|
|
if self.node_image is not None:
|
|
socket = (self.node_mapping if self._node_mapping is not None else self.node_image).inputs["Vector"]
|
|
if socket.is_linked:
|
|
return socket.links[0].from_socket.name
|
|
return 'UV'
|
|
|
|
@_set_check
|
|
def texcoords_set(self, texcoords):
|
|
# Image texture node already defaults to UVs, no extra node needed.
|
|
if texcoords == 'UV':
|
|
return
|
|
tree = self.node_image.id_data
|
|
links = tree.links
|
|
node_dst = self.node_mapping if self._node_mapping is not None else self.node_image
|
|
socket_src = self.owner_shader.node_texcoords.outputs[texcoords]
|
|
links.new(socket_src, node_dst.inputs["Vector"])
|
|
texcoords = property(texcoords_get, texcoords_set)
|
|
|
|
# --------------------------------------------------------------------
|
|
# Mapping.
|
|
|
|
def node_mapping_get(self):
|
|
if self._node_mapping is None:
|
|
if self.node_image is None:
|
|
return None
|
|
if self.node_image.inputs["Vector"].is_linked:
|
|
node_mapping = self.node_image.inputs["Vector"].links[0].from_node
|
|
if node_mapping.bl_idname == 'ShaderNodeMapping':
|
|
self._node_mapping = node_mapping
|
|
self.owner_shader._grid_to_location(0, 0 + self.grid_row_diff, ref_node=node_mapping)
|
|
if self._node_mapping is None and not self.is_readonly:
|
|
# Find potential existing link into image's Vector input.
|
|
socket_dst = self.node_image.inputs["Vector"]
|
|
socket_src = socket_dst.links[0].from_socket if socket_dst.is_linked else None
|
|
|
|
tree = self.owner_shader.material.node_tree
|
|
node_mapping = tree.nodes.new(type='ShaderNodeMapping')
|
|
node_mapping.vector_type = 'TEXTURE'
|
|
self.owner_shader._grid_to_location(-1, 0, dst_node=node_mapping, ref_node=self.node_image)
|
|
|
|
# link mapping -> image node
|
|
tree.links.new(node_mapping.outputs["Vector"], socket_dst)
|
|
# And if already existing, re-link texcoords -> mapping
|
|
if socket_src is not None:
|
|
tree.links.new(socket_src, node_mapping.inputs["Vector"])
|
|
|
|
self._node_mapping = node_mapping
|
|
return self._node_mapping
|
|
node_mapping = property(node_mapping_get)
|
|
|
|
def translation_get(self):
|
|
return self.node_mapping.translation if self.node_mapping is not None else Vector((0.0, 0.0, 0.0))
|
|
|
|
@_set_check
|
|
def translation_set(self, translation):
|
|
self.node_mapping.translation = translation
|
|
translation = property(translation_get, translation_set)
|
|
|
|
def rotation_get(self):
|
|
return self.node_mapping.rotation if self.node_mapping is not None else Vector((0.0, 0.0, 0.0))
|
|
|
|
@_set_check
|
|
def rotation_set(self, rotation):
|
|
self.node_mapping.rotation = rotation
|
|
rotation = property(rotation_get, rotation_set)
|
|
|
|
def scale_get(self):
|
|
return self.node_mapping.scale if self.node_mapping is not None else Vector((1.0, 1.0, 1.0))
|
|
|
|
@_set_check
|
|
def scale_set(self, scale):
|
|
self.node_mapping.scale = scale
|
|
scale = property(scale_get, scale_set)
|
|
|
|
def use_min_get(self):
|
|
return self.node_mapping.use_min if self_mapping.node is not None else False
|
|
|
|
@_set_check
|
|
def use_min_set(self, use_min):
|
|
self.node_mapping.use_min = use_min
|
|
use_min = property(use_min_get, use_min_set)
|
|
|
|
def use_max_get(self):
|
|
return self.node_mapping.use_max if self_mapping.node is not None else False
|
|
|
|
@_set_check
|
|
def use_max_set(self, use_max):
|
|
self.node_mapping.use_max = use_max
|
|
use_max = property(use_max_get, use_max_set)
|
|
|
|
def min_get(self):
|
|
return self.node_mapping.min if self.node_mapping is not None else Vector((0.0, 0.0, 0.0))
|
|
|
|
@_set_check
|
|
def min_set(self, min):
|
|
self.node_mapping.min = min
|
|
min = property(min_get, min_set)
|
|
|
|
def max_get(self):
|
|
return self.node_mapping.max if self.node_mapping is not None else Vector((0.0, 0.0, 0.0))
|
|
|
|
@_set_check
|
|
def max_set(self, max):
|
|
self.node_mapping.max = max
|
|
max = property(max_get, max_set)
|