3 def compute_render_method_hash(material):
5 for m in material.render_methods:
8 descr += "{}={}".format(m.tag, m.shader)
11 def check_group(node_tree, group, func):
12 from .util import get_linked_node_and_socket
14 output = group.node_tree.nodes["Group Output"]
15 from_node, _ = get_linked_node_and_socket(group.node_tree, output.inputs[0])
17 from_node, _ = func(group.node_tree, from_node)
18 if from_node and from_node.type=='GROUP_INPUT':
19 return get_linked_node_and_socket(node_tree, group.inputs[0])
22 def check_invert_green(node_tree, node):
23 if node.type=='GROUP':
24 return check_group(node_tree, node, check_invert_green)
25 elif node.type!='COMBRGB':
28 from .util import get_linked_node_and_socket
30 green, g_sock = get_linked_node_and_socket(node_tree, node.inputs["G"])
31 if not green or green.type!='MATH' or green.operation!='SUBTRACT':
33 green, g_sock = get_linked_node_and_socket(node_tree, green.inputs[1])
35 red, r_sock = get_linked_node_and_socket(node_tree, node.inputs["R"])
36 blue, b_sock = get_linked_node_and_socket(node_tree, node.inputs["B"])
37 if not red or red.type!='SEPRGB' or blue!=red or green!=red:
40 return get_linked_node_and_socket(node_tree, red.inputs["Image"])
42 def get_unlit_inputs(node_tree, node):
43 if node.type=='GROUP':
44 return check_group(node_tree, node, get_unlit_inputs)
45 elif node.type=='MIX_SHADER':
46 from .util import get_linked_node_and_socket
48 shader1, _ = get_linked_node_and_socket(node_tree, node.inputs[1])
49 shader2, _ = get_linked_node_and_socket(node_tree, node.inputs[2])
50 if shader1.type=='BSDF_TRANSPARENT' and shader2.type=='EMISSION':
51 factor_input = node.inputs["Fac"]
52 factor_from, _ = get_linked_node_and_socket(node_tree, factor_input)
53 color_input = shader2.inputs["Color"]
54 color_from, _ = get_linked_node_and_socket(node_tree, color_input)
55 if factor_from==color_from:
56 return (color_input, factor_input)
57 elif node.type=='EMISSION':
58 return (node.inputs["Color"], None)
61 class MaterialProperty:
62 def __init__(self, keyword, tex_keyword, value):
63 self.keyword = keyword
64 self.tex_keyword = tex_keyword
68 self.invert_green = False
70 def set_from_input(self, node_tree, input_socket, alpha_socket=None):
72 if type(self.value)==tuple:
74 self.value = input_socket.default_value[:len(self.value)-1]+(alpha_socket.default_value,)
76 self.value = input_socket.default_value[:len(self.value)]
78 self.value = input_socket.default_value
81 from .util import get_linked_node_and_socket
83 from_node, _ = get_linked_node_and_socket(node_tree, input_socket)
87 if from_node.type=='NORMAL_MAP':
88 from_node, _ = get_linked_node_and_socket(node_tree, from_node.inputs["Color"])
89 invert, _ = check_invert_green(node_tree, from_node)
92 self.invert_green = True
94 elif from_node.type=='RGBTOBW':
95 from_node, _ = get_linked_node_and_socket(node_tree, from_node.inputs["Color"])
98 alpha_from, _ = get_linked_node_and_socket(node_tree, alpha_socket)
99 if alpha_from and alpha_from!=from_node:
100 raise Exception("Separate textures for color and alpha are not supported")
102 if from_node.type=='TEX_IMAGE':
103 self.texture = from_node
105 self.tex_usage = usage
107 self.tex_usage = 'RGBA'
108 elif type(self.value)==tuple:
109 self.tex_usage = 'RGB'
111 self.tex_usage = 'GRAY'
113 raise Exception("Unsupported property input node type "+from_node.type)
116 def __init__(self, material):
117 self.name = material.name
121 self.render_mode = material.render_mode
122 self.technique = material.technique
123 self.render_methods = material.render_methods[:]
124 self.receive_shadows = material.receive_shadows
125 self.cast_shadows = (material.shadow_method!='NONE')
126 self.image_based_lighting = material.image_based_lighting
128 if self.render_mode=='EXTERNAL' and not self.technique:
129 raise Exception("Invalid configuration on material {}: No technique for external rendering".format(self.name))
130 elif self.render_mode=='CUSTOM' and not self.render_methods:
131 raise Exception("Invalid configuration on material {}: No render methods for custom rendering".format(self.name))
133 out_node = next((n for n in material.node_tree.nodes if n.type=='OUTPUT_MATERIAL'), None)
135 raise Exception("No output node found on material {}".format(self.name))
137 from .util import get_linked_node_and_socket
139 surface_node, _ = get_linked_node_and_socket(material.node_tree, out_node.inputs["Surface"])
141 if self.render_mode=='BUILTIN':
142 raise Exception("Invalid configuration on material {}: Empty material with builtin rendering".format(self.name))
144 elif surface_node.type=='BSDF_PRINCIPLED':
147 base_color = self.create_property("base_color", (0.8, 0.8, 0.8, 1.0))
148 metalness = self.create_property("metalness", 0.0)
149 roughness = self.create_property("roughness", 0.5)
150 normal = self.create_property("normal_map")
151 emission = self.create_property("emission", (0.0, 0.0, 0.0))
153 base_color.set_from_input(material.node_tree, surface_node.inputs["Base Color"], surface_node.inputs["Alpha"])
154 metalness.set_from_input(material.node_tree, surface_node.inputs["Metallic"])
155 roughness.set_from_input(material.node_tree, surface_node.inputs["Roughness"])
156 normal.set_from_input(material.node_tree, surface_node.inputs["Normal"])
157 emission.set_from_input(material.node_tree, surface_node.inputs["Emission"])
158 elif surface_node.type=='EMISSION' or surface_node.type=='MIX_SHADER':
159 color_input, alpha_input = get_unlit_inputs(material.node_tree, surface_node)
161 raise Exception("Unsupported configuration for unlit material {}".format(self.name))
165 color = self.create_property("color", "texture", (1.0, 1.0, 1.0, 1.0))
167 color.set_from_input(material.node_tree, color_input, alpha_input)
169 raise Exception("Unsupported surface node type {} on material {}".format(surface_node.type, self.name))
171 sampler_settings = None
172 for p in self.properties:
174 settings = (p.texture.interpolation, p.texture.use_mipmap, p.texture.max_anisotropy)
175 if sampler_settings is None:
176 sampler_settings = settings
177 elif settings!=sampler_settings:
178 raise Exception("Material {} has conflicting texture sampler settings".format(self.name))
180 def create_property(self, *args):
183 prop = MaterialProperty(None, args[0], None)
185 prop = MaterialProperty(args[0], args[0]+"_map", args[1])
187 prop = MaterialProperty(*args)
188 self.properties.append(prop)
193 def __init__(self, materials):
194 self.render_mode = materials[0].render_mode
195 if self.render_mode=='EXTERNAL':
196 raise Exception("Material atlas with external render mode does not make sense")
198 if self.render_mode=='CUSTOM':
199 self.render_methods = materials[0].render_methods
201 self.render_methods = None
202 if self.render_methods:
203 self.name = "material_atlas_"+os.path.splitext(self.render_methods[0].shader)[0]
205 self.name = "material_atlas"
206 self.receive_shadows = materials[0].receive_shadows
207 self.cast_shadows = (materials[0].shadow_method!='NONE')
208 self.materials = materials
209 self.material_names = [m.name for m in self.materials]
211 method_hash = compute_render_method_hash(self)
212 for m in self.materials:
213 if m.render_mode!=self.render_mode:
214 raise Exception("Conflicting render modes in MaterialAtlas constructor")
215 if self.render_mode=='CUSTOM' and compute_render_method_hash(m)!=method_hash:
216 raise Exception("Conflicting shaders in MaterialAtlas constructor")
217 if m.receive_shadows!=self.receive_shadows or m.shadow_method!=materials[0].shadow_method:
218 raise Exception("Conflicting shadow settings in MaterialAtlas constructor")
220 count = len(self.materials)
222 while size*size*2<count:
225 self.size = (size, size)
227 self.size = (size*2, size)
229 from .util import get_colormap
231 cm = get_colormap(True)
232 self.base_color_data = ""
233 for m in map(Material, self.materials):
234 if any(p.texture for p in m.properties):
235 raise Exception("Texturing is incompatible with material atlas")
236 base_color = [int(cm(c)*255) for c in m.base_color.value]
237 self.base_color_data += "\\x{:02X}\\x{:02X}\\x{:02X}\\xFF".format(*base_color)
238 self.base_color_data += "\\x00\\x00\\x00\\x00"*(self.size[0]*self.size[1]-count)
240 def get_material_uv(self, material):
241 index = self.material_names.index(material.name)
242 x = index%self.size[0]
243 y = index//self.size[0]
244 return ((x+0.5)/self.size[0], (y+0.5)/self.size[1])
246 def create_material_atlas(context, material):
247 if not material.material_atlas:
248 raise Exception("Material is not part of a material atlas")
250 method_hash = compute_render_method_hash(material)
252 for m in context.blend_data.materials:
253 if m.material_atlas and compute_render_method_hash(m)==method_hash:
256 return MaterialAtlas(materials)