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, value):
17 def set_from_input(self, node_tree, input_socket, alpha_socket=None):
18 if type(self.value)==tuple:
20 self.value = input_socket.default_value[:len(self.value)-1]+(alpha_socket.default_value,)
22 self.value = input_socket.default_value[:len(self.value)]
23 elif self.value is not None:
24 self.value = input_socket.default_value
26 from_node, _ = get_linked_node_and_socket(node_tree, input_socket)
29 if from_node.type=='NORMAL_MAP':
30 from_node, _ = get_linked_node_and_socket(node_tree, from_node.inputs["Color"])
33 alpha_from, _ = get_linked_node_and_socket(node_tree, alpha_socket)
34 if alpha_from and alpha_from!=from_node:
35 raise Exception("Separate textures for color and alpha are not supported")
37 if from_node.type=='TEX_IMAGE':
38 self.texture = from_node
40 self.tex_usage = 'RGBA'
41 elif type(self.value)==tuple:
42 self.tex_usage = 'RGB'
44 self.tex_usage = 'GRAY'
46 raise Exception("Unsupported property input node type "+from_node.type)
49 def __init__(self, material):
50 self.name = material.name
53 self.render_mode = material.render_mode
54 self.technique = material.technique
55 self.shader = material.shader
57 if self.render_mode=='EXTERNAL' and not self.technique:
58 raise Exception("Missing technique with external rendering mode")
59 elif self.render_mode=='CUSTOM' and not self.shader:
60 raise Exception("Missing shader with custom rendering mode")
63 for n in material.node_tree.nodes:
64 if n.type=='OUTPUT_MATERIAL':
69 raise Exception("No material output node found")
71 surface_node, _ = get_linked_node_and_socket(material.node_tree, out_node.inputs["Surface"])
73 raise Exception("Material has no surface node")
74 elif surface_node.type!='BSDF_PRINCIPLED':
75 raise Exception("Unsupported surface node type "+surface_node.type)
77 base_color = self.properties["base_color"] = MaterialProperty((0.8, 0.8, 0.8, 1.0))
78 metalness = self.properties["metalness"] = MaterialProperty(0.0)
79 roughness = self.properties["roughness"] = MaterialProperty(0.5)
80 normal = self.properties["normal"] = MaterialProperty(None)
81 emission = self.properties["emission"] = MaterialProperty((0.0, 0.0, 0.0))
83 base_color.set_from_input(material.node_tree, surface_node.inputs["Base Color"], surface_node.inputs["Alpha"])
84 metalness.set_from_input(material.node_tree, surface_node.inputs["Metallic"])
85 roughness.set_from_input(material.node_tree, surface_node.inputs["Roughness"])
86 normal.set_from_input(material.node_tree, surface_node.inputs["Normal"])
87 emission.set_from_input(material.node_tree, surface_node.inputs["Emission"])
89 sampler_settings = None
90 for p in self.properties.values():
92 settings = (p.texture.default_filter, p.texture.interpolation, p.texture.use_mipmap, p.texture.max_anisotropy)
93 if sampler_settings is None:
94 sampler_settings = settings
95 elif settings!=sampler_settings:
96 raise Exception("Conflicting sampler settings in material textures")
100 def __init__(self, materials):
101 self.render_mode = materials[0].render_mode
102 if self.render_mode=='EXTERNAL':
103 raise Exception("Material map with external render mode does not make sense")
105 self.shader = materials[0].shader
107 self.name = "material_map_"+os.path.splitext(self.shader)[0]
109 self.name = "material_map"
110 self.materials = materials
111 self.material_names = [m.name for m in self.materials]
112 for m in self.materials:
113 if m.render_mode!=self.render_mode:
114 raise Exception("Conflicting render modes in MaterialMap constructor")
115 if self.render_mode=='CUSTOM' and m.shader!=self.shader:
116 raise Exception("Conflicting shaders in MaterialMap constructor")
118 count = len(self.materials)
120 while size*size*2<count:
123 self.size = (size, size)
125 self.size = (size*2, size)
127 from .util import get_colormap
129 cm = get_colormap(True)
130 self.base_color_data = ""
131 for m in map(Material, self.materials):
132 if any(p.texture for p in m.properties):
133 raise Exception("Texturing is incompatible with material map")
134 base_color = [int(cm(c)*255) for c in m.base_color.value]
135 self.base_color_data += "\\x{:02X}\\x{:02X}\\x{:02X}\\xFF".format(*base_color)
136 self.base_color_data += "\\x00\\x00\\x00\\x00"*(self.size[0]*self.size[1]-count)
138 def get_material_uv(self, material):
139 index = self.material_names.index(material.name)
140 x = index%self.size[0]
141 y = index//self.size[0]
142 return ((x+0.5)/self.size[0], (y+0.5)/self.size[1])
144 def create_material_map(context, material):
145 if not material.material_map:
146 raise Exception("Material is not part of a material map")
148 shader = material.shader
150 for m in context.blend_data.materials:
151 if m.material_map and m.shader==shader:
154 mat_map = MaterialMap(materials)