3 def get_linked_node_and_socket(node_tree, socket):
4 for l in node_tree.links:
5 if socket==l.to_socket:
6 return (l.from_node, l.from_socket)
7 elif socket==l.from_socket:
8 return (l.to_node, l.to_socket)
11 class MaterialProperty:
12 def __init__(self, keyword, tex_keyword, value):
13 self.keyword = keyword
14 self.tex_keyword = tex_keyword
19 def set_from_input(self, node_tree, input_socket, alpha_socket=None):
21 if type(self.value)==tuple:
23 self.value = input_socket.default_value[:len(self.value)-1]+(alpha_socket.default_value,)
25 self.value = input_socket.default_value[:len(self.value)]
27 self.value = input_socket.default_value
30 from_node, _ = get_linked_node_and_socket(node_tree, input_socket)
34 if from_node.type=='NORMAL_MAP':
35 from_node, _ = get_linked_node_and_socket(node_tree, from_node.inputs["Color"])
37 elif from_node.type=='RGBTOBW':
38 from_node, _ = get_linked_node_and_socket(node_tree, from_node.inputs["Color"])
41 alpha_from, _ = get_linked_node_and_socket(node_tree, alpha_socket)
42 if alpha_from and alpha_from!=from_node:
43 raise Exception("Separate textures for color and alpha are not supported")
45 if from_node.type=='TEX_IMAGE':
46 self.texture = from_node
48 self.tex_usage = usage
50 self.tex_usage = 'RGBA'
51 elif type(self.value)==tuple:
52 self.tex_usage = 'RGB'
54 self.tex_usage = 'GRAY'
56 raise Exception("Unsupported property input node type "+from_node.type)
59 def __init__(self, material):
60 self.name = material.name
64 self.render_mode = material.render_mode
65 self.technique = material.technique
66 self.shader = material.shader
68 if self.render_mode=='EXTERNAL' and not self.technique:
69 raise Exception("Missing technique with external rendering mode")
70 elif self.render_mode=='CUSTOM' and not self.shader:
71 raise Exception("Missing shader with custom rendering mode")
74 for n in material.node_tree.nodes:
75 if n.type=='OUTPUT_MATERIAL':
80 raise Exception("No material output node found")
82 surface_node, _ = get_linked_node_and_socket(material.node_tree, out_node.inputs["Surface"])
84 if self.render_mode=='BUILTIN':
85 raise Exception("Empty material can't use builtin rendering mode")
87 elif surface_node.type=='BSDF_PRINCIPLED':
90 base_color = self.create_property("base_color", (0.8, 0.8, 0.8, 1.0))
91 metalness = self.create_property("metalness", 0.0)
92 roughness = self.create_property("roughness", 0.5)
93 normal = self.create_property("normal_map")
94 emission = self.create_property("emission", (0.0, 0.0, 0.0))
96 base_color.set_from_input(material.node_tree, surface_node.inputs["Base Color"], surface_node.inputs["Alpha"])
97 metalness.set_from_input(material.node_tree, surface_node.inputs["Metallic"])
98 roughness.set_from_input(material.node_tree, surface_node.inputs["Roughness"])
99 normal.set_from_input(material.node_tree, surface_node.inputs["Normal"])
100 emission.set_from_input(material.node_tree, surface_node.inputs["Emission"])
101 elif surface_node.type=='EMISSION':
104 color = self.create_property("color", "texture", (1.0, 1.0, 1.0, 1.0))
106 color.set_from_input(material.node_tree, surface_node.inputs["Color"])
108 raise Exception("Unsupported surface node type "+surface_node.type)
110 sampler_settings = None
111 for p in self.properties:
113 settings = (p.texture.default_filter, p.texture.interpolation, p.texture.use_mipmap, p.texture.max_anisotropy)
114 if sampler_settings is None:
115 sampler_settings = settings
116 elif settings!=sampler_settings:
117 raise Exception("Conflicting sampler settings in material textures")
119 def create_property(self, *args):
122 prop = MaterialProperty(None, args[0], None)
124 prop = MaterialProperty(args[0], args[0]+"_map", args[1])
126 prop = MaterialProperty(*args)
127 self.properties.append(prop)
132 def __init__(self, materials):
133 self.render_mode = materials[0].render_mode
134 if self.render_mode=='EXTERNAL':
135 raise Exception("Material atlas with external render mode does not make sense")
137 self.shader = materials[0].shader
139 self.name = "material_atlas_"+os.path.splitext(self.shader)[0]
141 self.name = "material_atlas"
142 self.materials = materials
143 self.material_names = [m.name for m in self.materials]
144 for m in self.materials:
145 if m.render_mode!=self.render_mode:
146 raise Exception("Conflicting render modes in MaterialAtlas constructor")
147 if self.render_mode=='CUSTOM' and m.shader!=self.shader:
148 raise Exception("Conflicting shaders in MaterialAtlas constructor")
150 count = len(self.materials)
152 while size*size*2<count:
155 self.size = (size, size)
157 self.size = (size*2, size)
159 from .util import get_colormap
161 cm = get_colormap(True)
162 self.base_color_data = ""
163 for m in map(Material, self.materials):
164 if any(p.texture for p in m.properties):
165 raise Exception("Texturing is incompatible with material atlas")
166 base_color = [int(cm(c)*255) for c in m.base_color.value]
167 self.base_color_data += "\\x{:02X}\\x{:02X}\\x{:02X}\\xFF".format(*base_color)
168 self.base_color_data += "\\x00\\x00\\x00\\x00"*(self.size[0]*self.size[1]-count)
170 def get_material_uv(self, material):
171 index = self.material_names.index(material.name)
172 x = index%self.size[0]
173 y = index//self.size[0]
174 return ((x+0.5)/self.size[0], (y+0.5)/self.size[1])
176 def create_material_atlas(context, material):
177 if not material.material_atlas:
178 raise Exception("Material is not part of a material atlas")
180 shader = material.shader
182 for m in context.blend_data.materials:
183 if m.material_atlas and m.shader==shader:
186 mat_map = MaterialAtlas(materials)