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, _ = get_linked_node_and_socket(node_tree, node.inputs["G"])
31 if not green or green.type!='MATH' or green.operation!='SUBTRACT':
33 green, _ = get_linked_node_and_socket(node_tree, green.inputs[1])
35 red, _ = get_linked_node_and_socket(node_tree, node.inputs["R"])
36 blue, _ = 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 check_additive_blend(node_tree, node):
43 if node.type=='GROUP':
44 return check_group(node_tree, node, check_additive_blend)
45 elif node.type=='ADD_SHADER':
46 from .util import get_linked_node_and_socket
48 shader1, _ = get_linked_node_and_socket(node_tree, node.inputs[0])
49 shader2, _ = get_linked_node_and_socket(node_tree, node.inputs[1])
50 if shader1.type=='BSDF_TRANSPARENT':
51 return get_linked_node_and_socket(node_tree, node.inputs[1])
52 elif shader2.type=='BSDF_TRANSPARENT':
53 return get_linked_node_and_socket(node_tree, node.inputs[0])
57 def get_unlit_inputs(node_tree, node, additive):
58 from .util import get_linked_node_and_socket
60 if node.type=='MIX_SHADER' and not additive:
61 shader1, _ = get_linked_node_and_socket(node_tree, node.inputs[1])
62 shader2, _ = get_linked_node_and_socket(node_tree, node.inputs[2])
63 if shader1.type=='BSDF_TRANSPARENT' and shader2.type=='EMISSION':
64 factor_input = node.inputs["Fac"]
65 factor_from, _ = get_linked_node_and_socket(node_tree, factor_input)
66 color_input = shader2.inputs["Color"]
67 color_from, _ = get_linked_node_and_socket(node_tree, color_input)
68 if factor_from==color_from:
69 return (color_input, factor_input)
70 elif node.type=='EMISSION':
71 color_input = node.inputs["Color"]
73 color_from, _ = get_linked_node_and_socket(node_tree, color_input)
74 if color_from.type=='MIX_RGB' and color_from.blend_type=='MIX':
75 mix_factor_input = color_from.inputs["Fac"]
76 mix_factor_from, _ = get_linked_node_and_socket(node_tree, mix_factor_input)
77 mix_color_input = color_from.inputs["Color2"]
78 mix_color_from, _ = get_linked_node_and_socket(node_tree, mix_color_input)
79 if mix_factor_from==mix_color_from:
80 return (mix_color_input, mix_factor_input)
81 return (color_input, None)
84 class MaterialProperty:
85 def __init__(self, keyword, tex_keyword, value):
86 self.keyword = keyword
87 self.tex_keyword = tex_keyword
90 self.tex_channels = None
92 def set_from_input(self, node_tree, input_socket, alpha_socket=None):
94 if type(self.value)==tuple:
96 self.value = input_socket.default_value[:len(self.value)-1]+(alpha_socket.default_value,)
98 self.value = input_socket.default_value[:len(self.value)]
100 self.value = input_socket.default_value
103 from .util import get_linked_node_and_socket
105 from_node, _ = get_linked_node_and_socket(node_tree, input_socket)
109 if from_node.type=='NORMAL_MAP':
110 from_node, _ = get_linked_node_and_socket(node_tree, from_node.inputs["Color"])
111 invert, _ = check_invert_green(node_tree, from_node)
112 channels = ['R', 'G', 'B']
116 elif from_node.type=='RGBTOBW':
117 from_node, _ = get_linked_node_and_socket(node_tree, from_node.inputs["Color"])
121 alpha_from, _ = get_linked_node_and_socket(node_tree, alpha_socket)
122 if alpha_from and alpha_from!=from_node:
123 raise Exception("Separate textures for color and alpha are not supported")
125 if from_node.type=='TEX_IMAGE':
126 self.texture = from_node
128 self.tex_channels = channels
130 self.tex_channels = ['R', 'G', 'B', 'A']
131 elif type(self.value)==tuple:
132 self.tex_channels = ['R', 'G', 'B']
134 self.tex_channels = ['Y']
136 raise Exception("Unsupported property input node type "+from_node.type)
139 def __init__(self, material):
140 self.name = material.name
144 self.render_mode = material.render_mode
145 self.technique = material.technique
146 self.render_methods = material.render_methods[:]
147 self.uniforms = material.uniforms[:]
148 self.receive_shadows = material.receive_shadows
149 self.cast_shadows = (material.shadow_method!='NONE')
150 self.blend_type = 'ALPHA' if material.blend_method=='BLEND' else 'NONE'
151 self.image_based_lighting = material.image_based_lighting
153 if self.render_mode=='EXTERNAL' and not self.technique:
154 raise Exception("Invalid configuration on material {}: No technique for external rendering".format(self.name))
155 elif self.render_mode=='CUSTOM' and not self.render_methods:
156 raise Exception("Invalid configuration on material {}: No render methods for custom rendering".format(self.name))
158 out_node = next((n for n in material.node_tree.nodes if n.type=='OUTPUT_MATERIAL'), None)
160 raise Exception("No output node found on material {}".format(self.name))
162 from .util import get_linked_node_and_socket
164 surface_node, _ = get_linked_node_and_socket(material.node_tree, out_node.inputs["Surface"])
166 if self.render_mode=='BUILTIN':
167 raise Exception("Invalid configuration on material {}: Empty material with builtin rendering".format(self.name))
170 additive_node, _ = check_additive_blend(material.node_tree, surface_node)
172 self.blend_type = 'ADDITIVE'
173 surface_node = additive_node
175 if surface_node.type=='BSDF_PRINCIPLED':
178 base_color = self.create_property("base_color", (0.8, 0.8, 0.8, 1.0))
179 metalness = self.create_property("metalness", 0.0)
180 roughness = self.create_property("roughness", 0.5)
181 normal = self.create_property("normal_map")
182 emission = self.create_property("emission", (0.0, 0.0, 0.0))
184 base_color.set_from_input(material.node_tree, surface_node.inputs["Base Color"], surface_node.inputs["Alpha"])
185 metalness.set_from_input(material.node_tree, surface_node.inputs["Metallic"])
186 roughness.set_from_input(material.node_tree, surface_node.inputs["Roughness"])
187 normal.set_from_input(material.node_tree, surface_node.inputs["Normal"])
188 emission.set_from_input(material.node_tree, surface_node.inputs["Emission"])
189 elif surface_node.type=='EMISSION' or surface_node.type=='MIX_SHADER':
190 color_input, alpha_input = get_unlit_inputs(material.node_tree, surface_node, self.blend_type=='ADDITIVE')
192 raise Exception("Unsupported configuration for unlit material {}".format(self.name))
196 color = self.create_property("color", "texture", (1.0, 1.0, 1.0, 1.0))
198 color.set_from_input(material.node_tree, color_input, alpha_input)
199 if self.blend_type=='ADDITIVE' and alpha_input:
200 self.blend_type = 'ADDITIVE_ALPHA'
202 raise Exception("Unsupported surface node type {} on material {}".format(surface_node.type, self.name))
204 sampler_settings = None
205 for p in self.properties:
207 settings = (p.texture.interpolation, p.texture.use_mipmap, p.texture.max_anisotropy)
208 if sampler_settings is None:
209 sampler_settings = settings
210 elif settings!=sampler_settings:
211 raise Exception("Material {} has conflicting texture sampler settings".format(self.name))
213 def create_property(self, *args):
216 prop = MaterialProperty(None, args[0], None)
218 prop = MaterialProperty(args[0], args[0]+"_map", args[1])
220 prop = MaterialProperty(*args)
221 self.properties.append(prop)
226 def __init__(self, materials):
227 self.render_mode = materials[0].render_mode
228 if self.render_mode=='EXTERNAL':
229 raise Exception("Material atlas with external render mode does not make sense")
231 if self.render_mode=='CUSTOM':
232 self.render_methods = materials[0].render_methods
234 self.render_methods = None
235 if self.render_methods:
236 self.name = "material_atlas_"+os.path.splitext(self.render_methods[0].shader)[0]
238 self.name = "material_atlas"
239 self.receive_shadows = materials[0].receive_shadows
240 self.cast_shadows = (materials[0].shadow_method!='NONE')
241 self.materials = materials
242 self.material_names = [m.name for m in self.materials]
244 method_hash = compute_render_method_hash(self)
245 for m in self.materials:
246 if m.render_mode!=self.render_mode:
247 raise Exception("Conflicting render modes in MaterialAtlas constructor")
248 if self.render_mode=='CUSTOM' and compute_render_method_hash(m)!=method_hash:
249 raise Exception("Conflicting shaders in MaterialAtlas constructor")
250 if m.receive_shadows!=self.receive_shadows or m.shadow_method!=materials[0].shadow_method:
251 raise Exception("Conflicting shadow settings in MaterialAtlas constructor")
253 count = len(self.materials)
255 while size*size*2<count:
258 self.size = (size, size)
260 self.size = (size*2, size)
262 from .util import get_colormap
264 cm = get_colormap(True)
265 self.base_color_data = ""
266 for m in map(Material, self.materials):
267 if any(p.texture for p in m.properties):
268 raise Exception("Texturing is incompatible with material atlas")
269 base_color = [int(cm(c)*255) for c in m.base_color.value]
270 self.base_color_data += "\\x{:02X}\\x{:02X}\\x{:02X}\\xFF".format(*base_color)
271 self.base_color_data += "\\x00\\x00\\x00\\x00"*(self.size[0]*self.size[1]-count)
273 def get_material_uv(self, material):
274 index = self.material_names.index(material.name)
275 x = index%self.size[0]
276 y = index//self.size[0]
277 return ((x+0.5)/self.size[0], (y+0.5)/self.size[1])
279 def create_material_atlas(context, material):
280 if not material.material_atlas:
281 raise Exception("Material is not part of a material atlas")
283 method_hash = compute_render_method_hash(material)
285 for m in context.blend_data.materials:
286 if m.material_atlas and compute_render_method_hash(m)==method_hash:
289 return MaterialAtlas(materials)