3 def check_group(node_tree, group, func):
4 from .util import get_linked_node_and_socket
6 output = group.node_tree.nodes["Group Output"]
7 from_node, _ = get_linked_node_and_socket(group.node_tree, output.inputs[0])
9 from_node, _ = func(group.node_tree, from_node)
10 if from_node and from_node.type=='GROUP_INPUT':
11 return get_linked_node_and_socket(node_tree, group.inputs[0])
14 def check_invert_green(node_tree, node):
15 if node.type=='GROUP':
16 return check_group(node_tree, node, check_invert_green)
17 elif node.type!='COMBRGB':
20 from .util import get_linked_node_and_socket
22 green, g_sock = get_linked_node_and_socket(node_tree, node.inputs["G"])
23 if not green or green.type!='MATH' or green.operation!='SUBTRACT':
25 green, g_sock = get_linked_node_and_socket(node_tree, green.inputs[1])
27 red, r_sock = get_linked_node_and_socket(node_tree, node.inputs["R"])
28 blue, b_sock = get_linked_node_and_socket(node_tree, node.inputs["B"])
29 if not red or red.type!='SEPRGB' or blue!=red or green!=red:
32 return get_linked_node_and_socket(node_tree, red.inputs["Image"])
34 class MaterialProperty:
35 def __init__(self, keyword, tex_keyword, value):
36 self.keyword = keyword
37 self.tex_keyword = tex_keyword
41 self.invert_green = False
43 def set_from_input(self, node_tree, input_socket, alpha_socket=None):
45 if type(self.value)==tuple:
47 self.value = input_socket.default_value[:len(self.value)-1]+(alpha_socket.default_value,)
49 self.value = input_socket.default_value[:len(self.value)]
51 self.value = input_socket.default_value
54 from .util import get_linked_node_and_socket
56 from_node, _ = get_linked_node_and_socket(node_tree, input_socket)
60 if from_node.type=='NORMAL_MAP':
61 from_node, _ = get_linked_node_and_socket(node_tree, from_node.inputs["Color"])
62 invert, _ = check_invert_green(node_tree, from_node)
65 self.invert_green = True
67 elif from_node.type=='RGBTOBW':
68 from_node, _ = get_linked_node_and_socket(node_tree, from_node.inputs["Color"])
71 alpha_from, _ = get_linked_node_and_socket(node_tree, alpha_socket)
72 if alpha_from and alpha_from!=from_node:
73 raise Exception("Separate textures for color and alpha are not supported")
75 if from_node.type=='TEX_IMAGE':
76 self.texture = from_node
78 self.tex_usage = usage
80 self.tex_usage = 'RGBA'
81 elif type(self.value)==tuple:
82 self.tex_usage = 'RGB'
84 self.tex_usage = 'GRAY'
86 raise Exception("Unsupported property input node type "+from_node.type)
89 def __init__(self, material):
90 self.name = material.name
94 self.render_mode = material.render_mode
95 self.technique = material.technique
96 self.shader = material.shader
97 self.receive_shadows = material.receive_shadows
98 self.cast_shadows = (material.shadow_method!='NONE')
100 if self.render_mode=='EXTERNAL' and not self.technique:
101 raise Exception("Invalid configuration on material {}: No technique for external rendering".format(self.name))
102 elif self.render_mode=='CUSTOM' and not self.shader:
103 raise Exception("Invalid configuration on material {}: No shader for custom rendering".format(self.name))
105 out_node = next((n for n in material.node_tree.nodes if n.type=='OUTPUT_MATERIAL'), None)
107 raise Exception("No output node found on material {}".format(self.name))
109 from .util import get_linked_node_and_socket
111 surface_node, _ = get_linked_node_and_socket(material.node_tree, out_node.inputs["Surface"])
113 if self.render_mode=='BUILTIN':
114 raise Exception("Invalid configuration on material {}: Empty material with builtin rendering".format(self.name))
116 elif surface_node.type=='BSDF_PRINCIPLED':
119 base_color = self.create_property("base_color", (0.8, 0.8, 0.8, 1.0))
120 metalness = self.create_property("metalness", 0.0)
121 roughness = self.create_property("roughness", 0.5)
122 normal = self.create_property("normal_map")
123 emission = self.create_property("emission", (0.0, 0.0, 0.0))
125 base_color.set_from_input(material.node_tree, surface_node.inputs["Base Color"], surface_node.inputs["Alpha"])
126 metalness.set_from_input(material.node_tree, surface_node.inputs["Metallic"])
127 roughness.set_from_input(material.node_tree, surface_node.inputs["Roughness"])
128 normal.set_from_input(material.node_tree, surface_node.inputs["Normal"])
129 emission.set_from_input(material.node_tree, surface_node.inputs["Emission"])
130 elif surface_node.type=='EMISSION':
133 color = self.create_property("color", "texture", (1.0, 1.0, 1.0, 1.0))
135 color.set_from_input(material.node_tree, surface_node.inputs["Color"])
137 raise Exception("Unsupported surface node type {} on material {}".format(surface_node.type, self.name))
139 sampler_settings = None
140 for p in self.properties:
142 settings = (p.texture.default_filter, p.texture.interpolation, p.texture.use_mipmap, p.texture.max_anisotropy)
143 if sampler_settings is None:
144 sampler_settings = settings
145 elif settings!=sampler_settings:
146 raise Exception("Material {} has conflicting texture sampler settings".format(self.name))
148 def create_property(self, *args):
151 prop = MaterialProperty(None, args[0], None)
153 prop = MaterialProperty(args[0], args[0]+"_map", args[1])
155 prop = MaterialProperty(*args)
156 self.properties.append(prop)
161 def __init__(self, materials):
162 self.render_mode = materials[0].render_mode
163 if self.render_mode=='EXTERNAL':
164 raise Exception("Material atlas with external render mode does not make sense")
166 self.shader = materials[0].shader
168 self.name = "material_atlas_"+os.path.splitext(self.shader)[0]
170 self.name = "material_atlas"
171 self.receive_shadows = materials[0].receive_shadows
172 self.cast_shadows = (materials[0].shadow_method!='NONE')
173 self.materials = materials
174 self.material_names = [m.name for m in self.materials]
175 for m in self.materials:
176 if m.render_mode!=self.render_mode:
177 raise Exception("Conflicting render modes in MaterialAtlas constructor")
178 if self.render_mode=='CUSTOM' and m.shader!=self.shader:
179 raise Exception("Conflicting shaders in MaterialAtlas constructor")
180 if m.receive_shadows!=self.receive_shadows or m.shadow_method!=materials[0].shadow_method:
181 raise Exception("Conflicting shadow settings in MaterialAtlas constructor")
183 count = len(self.materials)
185 while size*size*2<count:
188 self.size = (size, size)
190 self.size = (size*2, size)
192 from .util import get_colormap
194 cm = get_colormap(True)
195 self.base_color_data = ""
196 for m in map(Material, self.materials):
197 if any(p.texture for p in m.properties):
198 raise Exception("Texturing is incompatible with material atlas")
199 base_color = [int(cm(c)*255) for c in m.base_color.value]
200 self.base_color_data += "\\x{:02X}\\x{:02X}\\x{:02X}\\xFF".format(*base_color)
201 self.base_color_data += "\\x00\\x00\\x00\\x00"*(self.size[0]*self.size[1]-count)
203 def get_material_uv(self, material):
204 index = self.material_names.index(material.name)
205 x = index%self.size[0]
206 y = index//self.size[0]
207 return ((x+0.5)/self.size[0], (y+0.5)/self.size[1])
209 def create_material_atlas(context, material):
210 if not material.material_atlas:
211 raise Exception("Material is not part of a material atlas")
213 shader = material.shader
215 for m in context.blend_data.materials:
216 if m.material_atlas and m.shader==shader:
219 return MaterialAtlas(materials)