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# ##### 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.
#
# ##### END GPL LICENSE BLOCK #####
# <pep8 compliant>
import bpy
__all__ = (
"CyclesShaderWrapper",
)
class CyclesShaderWrapper():
"""
Hard coded shader setup.
Suitable for importers, adds basic:
diffuse/spec/alpha/normal/bump/reflect.
"""
__slots__ = (
"material",
"node_out",
"node_mix_shader_spec",
"node_mix_shader_alpha",
"node_mix_shader_refl",
"node_bsdf_alpha",
"node_bsdf_diff",
"node_bsdf_spec",
"node_bsdf_refl",
"node_mix_color_alpha",
"node_mix_color_diff",
"node_mix_color_spec",
"node_mix_color_hard",
"node_mix_color_refl",
"node_mix_color_bump",
"node_normalmap",
"node_image_alpha",
"node_image_diff",
"node_image_spec",
"node_image_hard",
"node_image_refl",
"node_image_bump",
"node_image_normalmap",
)
_col_size = 200
_row_size = 220
def __init__(self, material):
COLOR_WHITE = 1.0, 1.0, 1.0, 1.0
COLOR_BLACK = 0.0, 0.0, 0.0, 1.0
self.material = material
self.material.use_nodes = True
tree = self.material.node_tree
nodes = tree.nodes
links = tree.links
nodes.clear()
# ----
# Add shaders
node = nodes.new(type='ShaderNodeOutputMaterial')
node.label = "Material Out"
node.location = self._grid_location(6, 4)
self.node_out = node
del node
node = nodes.new(type='ShaderNodeAddShader')
node.label = "Shader Add Refl"
node.location = self._grid_location(5, 4)
self.node_mix_shader_refl = node
del node
# Link
links.new(self.node_mix_shader_refl.outputs["Shader"],
self.node_out.inputs["Surface"])
node = nodes.new(type='ShaderNodeAddShader')
node.label = "Shader Add Spec"
node.location = self._grid_location(4, 4)
self.node_mix_shader_spec = node
del node
# Link
links.new(self.node_mix_shader_spec.outputs["Shader"],
self.node_mix_shader_refl.inputs[0])
# --------------------------------------------------------------------
# Reflection
node = nodes.new(type='ShaderNodeBsdfRefraction')
node.label = "Refl BSDF"
node.location = self._grid_location(6, 1)
node.mute = True # unmute on use
self.node_bsdf_refl = node
del node
# Link
links.new(self.node_bsdf_refl.outputs["BSDF"],
self.node_mix_shader_refl.inputs[1])
# Mix Refl Color
node = nodes.new(type='ShaderNodeMixRGB')
node.label = "Mix Color/Refl"
node.location = self._grid_location(5, 1)
node.blend_type = 'MULTIPLY'
node.inputs["Fac"].default_value = 1.0
# reverse of most other mix nodes
node.inputs["Color1"].default_value = COLOR_WHITE # color
node.inputs["Color2"].default_value = COLOR_BLACK # factor
self.node_mix_color_refl = node
del node
# Link
links.new(self.node_mix_color_refl.outputs["Color"],
self.node_bsdf_refl.inputs["Color"])
# --------------------------------------------------------------------
# Alpha
# ----
# Mix shader
node = nodes.new(type='ShaderNodeMixShader')
node.label = "Shader Mix Alpha"
node.location = self._grid_location(3, 4)
node.inputs["Fac"].default_value = 1.0 # no alpha by default
self.node_mix_shader_alpha = node
del node
# Link
links.new(self.node_mix_shader_alpha.outputs["Shader"],
self.node_mix_shader_spec.inputs[0])
# Alpha BSDF
node = nodes.new(type='ShaderNodeBsdfTransparent')
node.label = "Alpha BSDF"
node.location = self._grid_location(2, 4)
node.mute = True # unmute on use
self.node_bsdf_alpha = node
del node
# Link
links.new(self.node_bsdf_alpha.outputs["BSDF"],
self.node_mix_shader_alpha.inputs[1]) # first 'Shader'
# Mix Alpha Color
node = nodes.new(type='ShaderNodeMixRGB')
node.label = "Mix Color/Alpha"
node.location = self._grid_location(1, 5)
node.blend_type = 'MULTIPLY'
node.inputs["Fac"].default_value = 1.0
node.inputs["Color1"].default_value = COLOR_WHITE
node.inputs["Color2"].default_value = COLOR_WHITE
self.node_mix_color_alpha = node
del node
# Link
links.new(self.node_mix_color_alpha.outputs["Color"],
self.node_mix_shader_alpha.inputs["Fac"])
# --------------------------------------------------------------------
# Diffuse
# Diffuse BSDF
node = nodes.new(type='ShaderNodeBsdfDiffuse')
node.label = "Diff BSDF"
node.location = self._grid_location(2, 3)
self.node_bsdf_diff = node
del node
# Link
links.new(self.node_bsdf_diff.outputs["BSDF"],
self.node_mix_shader_alpha.inputs[2]) # first 'Shader'
# Mix Diffuse Color
node = nodes.new(type='ShaderNodeMixRGB')
node.label = "Mix Color/Diffuse"
node.location = self._grid_location(1, 3)
node.blend_type = 'MULTIPLY'
node.inputs["Fac"].default_value = 1.0
node.inputs["Color1"].default_value = COLOR_WHITE
node.inputs["Color2"].default_value = COLOR_WHITE
self.node_mix_color_diff = node
del node
# Link
links.new(self.node_mix_color_diff.outputs["Color"],
self.node_bsdf_diff.inputs["Color"])
# --------------------------------------------------------------------
# Specular
node = nodes.new(type='ShaderNodeBsdfGlossy')
node.label = "Spec BSDF"
node.location = self._grid_location(2, 1)
node.mute = True # unmute on use
self.node_bsdf_spec = node
del node
# Link (with add shader)
links.new(self.node_bsdf_spec.outputs["BSDF"],
self.node_mix_shader_spec.inputs[1]) # second 'Shader' slot
node = nodes.new(type='ShaderNodeMixRGB')
node.label = "Mix Color/Diffuse"
node.location = self._grid_location(1, 1)
node.blend_type = 'MULTIPLY'
node.inputs["Fac"].default_value = 1.0
node.inputs["Color1"].default_value = COLOR_WHITE
node.inputs["Color2"].default_value = COLOR_BLACK
self.node_mix_color_spec = node
del node
# Link
links.new(self.node_mix_color_spec.outputs["Color"],
self.node_bsdf_spec.inputs["Color"])
node = nodes.new(type='ShaderNodeMixRGB')
node.label = "Mix Color/Hardness"
node.location = self._grid_location(0, 0)
node.blend_type = 'MULTIPLY'
node.inputs["Fac"].default_value = 1.0
node.inputs["Color1"].default_value = COLOR_WHITE
node.inputs["Color2"].default_value = COLOR_BLACK
self.node_mix_color_hard = node
del node
# Link
links.new(self.node_mix_color_hard.outputs["Color"],
self.node_bsdf_spec.inputs["Roughness"])
# --------------------------------------------------------------------
# Normal Map
node = nodes.new(type='ShaderNodeNormalMap')
node.label = "Normal/Map"
node.location = self._grid_location(1, 2)
node.mute = True # unmute on use
self.node_normalmap = node
del node
# Link (with diff shader)
socket_src = self.node_normalmap.outputs["Normal"]
links.new(socket_src,
self.node_bsdf_diff.inputs["Normal"])
# Link (with spec shader)
links.new(socket_src,
self.node_bsdf_spec.inputs["Normal"])
# Link (with refl shader)
links.new(socket_src,
self.node_bsdf_refl.inputs["Normal"])
del socket_src
# --------------------------------------------------------------------
# Bump Map
# Mix Refl Color
node = nodes.new(type='ShaderNodeMixRGB')
node.label = "Bump/Map"
node.location = self._grid_location(5, 3)
node.mute = True # unmute on use
node.blend_type = 'MULTIPLY'
node.inputs["Fac"].default_value = 1.0
# reverse of most other mix nodes
node.inputs["Color1"].default_value = COLOR_WHITE # color
node.inputs["Color2"].default_value = COLOR_BLACK # factor
self.node_mix_color_bump = node
del node
# Link
links.new(self.node_mix_color_bump.outputs["Color"],
self.node_out.inputs["Displacement"])
@staticmethod
def _image_create_helper(image, node_dst, sockets_dst, use_alpha=False):
tree = node_dst.id_data
nodes = tree.nodes
links = tree.links
node = nodes.new(type='ShaderNodeTexImage')
node.image = image
node.location = node_dst.location
node.location.x -= CyclesShaderWrapper._col_size
for socket in sockets_dst:
links.new(node.outputs["Alpha" if use_alpha else "Color"],
socket)
return node
@staticmethod
def _grid_location(x, y):
return (x * CyclesShaderWrapper._col_size,
y * CyclesShaderWrapper._row_size)
def diffuse_color_set(self, color):
self.node_mix_color_diff.inputs["Color1"].default_value[0:3] = color
def diffuse_image_set(self, image):
node = self.node_mix_color_diff
(self.node_image_diff =
self._image_create_helper(image, node, (node.inputs["Color2"],)))
def specular_color_set(self, color):
self.node_bsdf_spec.mute = max(color) <= 0.0
self.node_mix_color_spec.inputs["Color1"].default_value[0:3] = color
def specular_image_set(self, image):
node = self.node_mix_color_spec
(self.node_image_spec =
self._image_create_helper(image, node, (node.inputs["Color2"],)))
def hardness_value_set(self, value):
node = self.node_mix_color_hard
node.inputs["Color1"].default_value = (value,) * 4
def hardness_image_set(self, image):
node = self.node_mix_color_hard
(self.node_image_hard =
self._image_create_helper(image, node, (node.inputs["Color2"],)))
def reflect_color_set(self, color):
node = self.node_mix_color_refl
node.inputs["Color1"].default_value[0:3] = color
def reflect_factor_set(self, value):
# XXX, conflicts with image
self.node_bsdf_refl.mute = value <= 0.0
node = self.node_mix_color_refl
node.inputs["Color2"].default_value = (value,) * 4
def reflect_image_set(self, image):
self.node_bsdf_refl.mute = False
node = self.node_mix_color_refl
(self.node_image_refl =
self._image_create_helper(image, node, (node.inputs["Color2"],)))
def alpha_value_set(self, value):
self.node_bsdf_alpha.mute &= (value >= 1.0)
node = self.node_mix_color_alpha
node.inputs["Color1"].default_value = (value,) * 4
def alpha_image_set(self, image):
self.node_bsdf_alpha.mute = False
node = self.node_mix_color_alpha
# note: use_alpha may need to be configurable
# its not always the case that alpha channels use the image alpha
# a greyscale image may also be used.
(self.node_image_alpha =
self._image_create_helper(image, node, (node.inputs["Color2"],), use_alpha=True))
def alpha_image_set_from_diffuse(self):
# XXX, remove?
tree = self.node_mix_color_diff.id_data
links = tree.links
self.node_bsdf_alpha.mute = False
node_image = self.node_mix_color_diff.inputs["Color2"].links[0].from_node
node = self.node_mix_color_alpha
links.new(node_image.outputs["Alpha"],
node.inputs["Color2"])
def normal_factor_set(self, value):
node = self.node_normalmap
node.inputs["Strength"].default_value = value
def normal_image_set(self, image):
self.node_normalmap.mute = False
node = self.node_normalmap
(self.node_image_normalmap =
self._image_create_helper(image, node, (node.inputs["Color"],)))
self.node_image_normalmap.color_space = 'NONE'
def bump_factor_set(self, value):
node = self.node_mix_color_bump
node.mute = (value <= 0.0)
node.inputs["Color1"].default_value = (value,) * 4
def bump_image_set(self, image):
node = self.node_mix_color_bump
(self.node_image_bump =
self._image_create_helper(image, node, (node.inputs["Color2"],)))
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