3 def compute_render_method_hash(material):
5 for m in material.render_methods:
8 descr += "{}={}".format(m.tag, m.shader)
12 def __init__(self, node_tree, node, socket):
13 self.node_tree = node_tree
20 checks = [self.check_group,
23 self.check_invert_channels,
24 self.check_additive_blend,
30 def set_input_from_linked(self, input_sock):
31 from .util import get_linked_node_and_socket
33 from_node, from_sock = get_linked_node_and_socket(self.node_tree, input_sock)
34 self.input = PropertyNode(self.node_tree, from_node, from_sock)
37 def check_group(self):
38 if self.node.type!='GROUP':
41 from .util import get_linked_node_and_socket
43 output = self.node.node_tree.nodes["Group Output"]
44 from_node, from_sock = get_linked_node_and_socket(self.node.node_tree, output.inputs[0])
45 inner = PropertyNode(self.node.node_tree, from_node, from_sock)
47 # TODO This currently only supports a single operation inside the group
48 if inner.input.node.type=='GROUP_INPUT':
49 self.type = inner.type
50 self.data = inner.data
51 return self.set_input_from_linked(self.node.inputs[0])
54 if self.node.type=='RGBTOBW':
56 self.set_input_from_linked(self.node.inputs["Color"])
58 def check_normal(self):
59 if self.node.type=='NORMAL_MAP':
61 return self.set_input_from_linked(self.node.inputs["Color"])
63 def check_invert_channels(self):
64 if self.node.type!='COMBRGB':
67 from .util import get_linked_node_and_socket
71 for c in ("R", "G", "B"):
72 from_node, _ = get_linked_node_and_socket(self.node_tree, self.node.inputs[c])
73 if from_node.type=='MATH' and from_node.operation=='SUBTRACT' and not from_node.inputs[0].is_linked and from_node.inputs[0].default_value==1.0:
75 from_node, _ = get_linked_node_and_socket(self.node_tree, from_node.inputs[1])
77 if from_node.type=='SEPRGB' and (separate is None or from_node==separate):
83 self.data = invert_channels
85 return self.set_input_from_linked(separate.inputs["Image"])
87 def check_additive_blend(self):
88 if self.node.type=='ADD_SHADER':
89 from .util import get_linked_node_and_socket
92 shader, _ = get_linked_node_and_socket(self.node_tree, self.node.inputs[i])
93 if shader.type=='BSDF_TRANSPARENT':
94 self.type = 'ADDITIVE'
95 return self.set_input_from_linked(self.node.inputs[1-i])
97 def check_texture(self):
98 if self.node.type=='TEX_IMAGE':
101 def get_unlit_inputs(node_tree, node, additive):
102 from .util import get_linked_node_and_socket
104 if node.type=='MIX_SHADER' and not additive:
105 shader1, _ = get_linked_node_and_socket(node_tree, node.inputs[1])
106 shader2, _ = get_linked_node_and_socket(node_tree, node.inputs[2])
107 if shader1.type=='BSDF_TRANSPARENT' and shader2.type=='EMISSION':
108 factor_input = node.inputs["Fac"]
109 factor_from, _ = get_linked_node_and_socket(node_tree, factor_input)
110 color_input = shader2.inputs["Color"]
111 color_from, _ = get_linked_node_and_socket(node_tree, color_input)
112 if factor_from==color_from:
113 return (color_input, factor_input)
114 elif node.type=='EMISSION':
115 color_input = node.inputs["Color"]
117 color_from, _ = get_linked_node_and_socket(node_tree, color_input)
118 if color_from.type=='MIX_RGB' and color_from.blend_type=='MIX':
119 mix_factor_input = color_from.inputs["Fac"]
120 mix_factor_from, _ = get_linked_node_and_socket(node_tree, mix_factor_input)
121 mix_color_input = color_from.inputs["Color2"]
122 mix_color_from, _ = get_linked_node_and_socket(node_tree, mix_color_input)
123 if mix_factor_from==mix_color_from:
124 return (mix_color_input, mix_factor_input)
125 return (color_input, None)
128 class MaterialProperty:
129 def __init__(self, keyword, tex_keyword, value):
130 self.keyword = keyword
131 self.tex_keyword = tex_keyword
134 self.tex_channels = None
136 def set_from_input(self, node_tree, input_socket, alpha_socket=None):
138 if type(self.value)==tuple:
140 self.value = input_socket.default_value[:len(self.value)-1]+(alpha_socket.default_value,)
142 self.value = input_socket.default_value[:len(self.value)]
144 self.value = input_socket.default_value
147 from .util import get_linked_node_and_socket
149 from_node, from_sock = get_linked_node_and_socket(node_tree, input_socket)
153 top_node = PropertyNode(node_tree, from_node, from_sock)
157 channels = ['R', 'G', 'B']
160 elif n.type=='INVERT':
161 channels = ['~'+c if c in n.data else c for c in channels]
162 elif n.type=='TEXTURE':
163 self.texture = n.node
167 alpha_from, _ = get_linked_node_and_socket(node_tree, alpha_socket)
168 if alpha_from and alpha_from!=self.texture:
169 raise Exception("Separate textures for color and alpha are not supported")
173 self.tex_channels = channels
175 self.tex_channels = ['R', 'G', 'B', 'A']
176 elif type(self.value)==tuple:
177 self.tex_channels = ['R', 'G', 'B']
179 self.tex_channels = ['Y']
181 raise Exception("Unsupported property input node type "+from_node.type)
184 def __init__(self, material):
185 self.name = material.name
189 self.render_mode = material.render_mode
190 self.technique = material.technique
191 self.render_methods = material.render_methods[:]
192 self.uniforms = material.uniforms[:]
193 self.receive_shadows = material.receive_shadows
194 self.cast_shadows = (material.shadow_method!='NONE')
195 self.blend_type = 'ALPHA' if material.blend_method=='BLEND' else 'NONE'
196 self.image_based_lighting = material.image_based_lighting
198 if self.render_mode=='EXTERNAL' and not self.technique:
199 raise Exception("Invalid configuration on material {}: No technique for external rendering".format(self.name))
200 elif self.render_mode=='CUSTOM' and not self.render_methods:
201 raise Exception("Invalid configuration on material {}: No render methods for custom rendering".format(self.name))
203 out_node = next((n for n in material.node_tree.nodes if n.type=='OUTPUT_MATERIAL'), None)
205 raise Exception("No output node found on material {}".format(self.name))
207 from .util import get_linked_node_and_socket
209 surface_node, _ = get_linked_node_and_socket(material.node_tree, out_node.inputs["Surface"])
211 if self.render_mode=='BUILTIN':
212 raise Exception("Invalid configuration on material {}: Empty material with builtin rendering".format(self.name))
215 additive_node, _ = check_additive_blend(material.node_tree, surface_node)
217 self.blend_type = 'ADDITIVE'
218 surface_node = additive_node
220 if surface_node.type=='BSDF_PRINCIPLED':
223 base_color = self.create_property("base_color", (0.8, 0.8, 0.8, 1.0))
224 metalness = self.create_property("metalness", 0.0)
225 roughness = self.create_property("roughness", 0.5)
226 normal = self.create_property("normal_map")
227 emission = self.create_property("emission", (0.0, 0.0, 0.0))
229 base_color.set_from_input(material.node_tree, surface_node.inputs["Base Color"], surface_node.inputs["Alpha"])
230 metalness.set_from_input(material.node_tree, surface_node.inputs["Metallic"])
231 roughness.set_from_input(material.node_tree, surface_node.inputs["Roughness"])
232 normal.set_from_input(material.node_tree, surface_node.inputs["Normal"])
233 emission.set_from_input(material.node_tree, surface_node.inputs["Emission"])
234 elif surface_node.type=='EMISSION' or surface_node.type=='MIX_SHADER':
235 color_input, alpha_input = get_unlit_inputs(material.node_tree, surface_node, self.blend_type=='ADDITIVE')
237 raise Exception("Unsupported configuration for unlit material {}".format(self.name))
241 color = self.create_property("color", "texture", (1.0, 1.0, 1.0, 1.0))
243 color.set_from_input(material.node_tree, color_input, alpha_input)
244 if self.blend_type=='ADDITIVE' and alpha_input:
245 self.blend_type = 'ADDITIVE_ALPHA'
247 raise Exception("Unsupported surface node type {} on material {}".format(surface_node.type, self.name))
249 sampler_settings = None
250 for p in self.properties:
252 settings = (p.texture.interpolation, p.texture.use_mipmap, p.texture.max_anisotropy)
253 if sampler_settings is None:
254 sampler_settings = settings
255 elif settings!=sampler_settings:
256 raise Exception("Material {} has conflicting texture sampler settings".format(self.name))
258 def create_property(self, *args):
261 prop = MaterialProperty(None, args[0], None)
263 prop = MaterialProperty(args[0], args[0]+"_map", args[1])
265 prop = MaterialProperty(*args)
266 self.properties.append(prop)
271 def __init__(self, materials):
272 self.render_mode = materials[0].render_mode
273 if self.render_mode=='EXTERNAL':
274 raise Exception("Material atlas with external render mode does not make sense")
276 if self.render_mode=='CUSTOM':
277 self.render_methods = materials[0].render_methods
279 self.render_methods = None
280 if self.render_methods:
281 self.name = "material_atlas_"+os.path.splitext(self.render_methods[0].shader)[0]
283 self.name = "material_atlas"
284 self.receive_shadows = materials[0].receive_shadows
285 self.cast_shadows = (materials[0].shadow_method!='NONE')
286 self.materials = materials
287 self.material_names = [m.name for m in self.materials]
289 method_hash = compute_render_method_hash(self)
290 for m in self.materials:
291 if m.render_mode!=self.render_mode:
292 raise Exception("Conflicting render modes in MaterialAtlas constructor")
293 if self.render_mode=='CUSTOM' and compute_render_method_hash(m)!=method_hash:
294 raise Exception("Conflicting shaders in MaterialAtlas constructor")
295 if m.receive_shadows!=self.receive_shadows or m.shadow_method!=materials[0].shadow_method:
296 raise Exception("Conflicting shadow settings in MaterialAtlas constructor")
298 count = len(self.materials)
300 while size*size*2<count:
303 self.size = (size, size)
305 self.size = (size*2, size)
307 from .util import get_colormap
309 cm = get_colormap(True)
310 self.base_color_data = ""
311 for m in map(Material, self.materials):
312 if any(p.texture for p in m.properties):
313 raise Exception("Texturing is incompatible with material atlas")
314 base_color = [int(cm(c)*255) for c in m.base_color.value]
315 self.base_color_data += "\\x{:02X}\\x{:02X}\\x{:02X}\\xFF".format(*base_color)
316 self.base_color_data += "\\x00\\x00\\x00\\x00"*(self.size[0]*self.size[1]-count)
318 def get_material_uv(self, material):
319 index = self.material_names.index(material.name)
320 x = index%self.size[0]
321 y = index//self.size[0]
322 return ((x+0.5)/self.size[0], (y+0.5)/self.size[1])
324 def create_material_atlas(context, material):
325 if not material.material_atlas:
326 raise Exception("Material is not part of a material atlas")
328 method_hash = compute_render_method_hash(material)
330 for m in context.blend_data.materials:
331 if m.material_atlas and compute_render_method_hash(m)==method_hash:
334 return MaterialAtlas(materials)