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)]
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
52 self.base_color = MaterialProperty((0.8, 0.8, 0.8, 1.0))
53 self.metalness = MaterialProperty(0.0)
54 self.roughness = MaterialProperty(0.5)
55 self.normal = MaterialProperty((0.0, 0.0, 0.1))
56 self.emission = MaterialProperty((0.0, 0.0, 0.0))
58 self.render_mode = material.render_mode
59 self.technique = material.technique
60 self.shader = material.shader
62 if self.render_mode=='EXTERNAL' and not self.technique:
63 raise Exception("Missing technique with external rendering mode")
64 elif self.render_mode=='CUSTOM' and not self.shader:
65 raise Exception("Missing shader with custom rendering mode")
68 for n in material.node_tree.nodes:
69 if n.type=='OUTPUT_MATERIAL':
74 raise Exception("No material output node found")
76 surface_node, _ = get_linked_node_and_socket(material.node_tree, out_node.inputs["Surface"])
78 raise Exception("Material has no surface node")
79 elif surface_node.type!='BSDF_PRINCIPLED':
80 raise Exception("Unsupported surface node type "+surface_node.type)
82 self.base_color.set_from_input(material.node_tree, surface_node.inputs["Base Color"], surface_node.inputs["Alpha"])
83 self.metalness.set_from_input(material.node_tree, surface_node.inputs["Metallic"])
84 self.roughness.set_from_input(material.node_tree, surface_node.inputs["Roughness"])
85 self.normal.set_from_input(material.node_tree, surface_node.inputs["Normal"])
86 self.emission.set_from_input(material.node_tree, surface_node.inputs["Emission"])
88 self.properties = (self.base_color, self.metalness, self.roughness, self.normal, self.emission)
90 sampler_settings = None
91 for p in self.properties:
93 settings = (p.texture.default_filter, p.texture.interpolation, p.texture.use_mipmap, p.texture.max_anisotropy)
94 if sampler_settings is None:
95 sampler_settings = settings
96 elif settings!=sampler_settings:
97 raise Exception("Conflicting sampler settings in material textures")
101 def __init__(self, materials):
102 self.render_mode = materials[0].render_mode
103 if self.render_mode=='EXTERNAL':
104 raise Exception("Material map with external render mode does not make sense")
106 self.shader = materials[0].shader
108 self.name = "material_map_"+os.path.splitext(self.shader)[0]
110 self.name = "material_map"
111 self.materials = materials
112 self.material_names = [m.name for m in self.materials]
113 for m in self.materials:
114 if m.render_mode!=self.render_mode:
115 raise Exception("Conflicting render modes in MaterialMap constructor")
116 if self.render_mode=='CUSTOM' and m.shader!=self.shader:
117 raise Exception("Conflicting shaders in MaterialMap constructor")
119 count = len(self.materials)
121 while size*size*2<count:
124 self.size = (size, size)
126 self.size = (size*2, size)
128 from .util import get_colormap
130 cm = get_colormap(True)
131 self.base_color_data = ""
132 for m in map(Material, self.materials):
133 if any(p.texture for p in m.properties):
134 raise Exception("Texturing is incompatible with material map")
135 base_color = [int(cm(c)*255) for c in m.base_color.value]
136 self.base_color_data += "\\x{:02X}\\x{:02X}\\x{:02X}\\xFF".format(*base_color)
137 self.base_color_data += "\\x00\\x00\\x00\\x00"*(self.size[0]*self.size[1]-count)
139 def get_material_uv(self, material):
140 index = self.material_names.index(material.name)
141 x = index%self.size[0]
142 y = index//self.size[0]
143 return ((x+0.5)/self.size[0], (y+0.5)/self.size[1])
145 def create_material_map(context, material):
146 if not material.material_map:
147 raise Exception("Material is not part of a material map")
149 shader = material.shader
151 for m in context.blend_data.materials:
152 if m.material_map and m.shader==shader:
155 mat_map = MaterialMap(materials)