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
54 self.render_mode = material.render_mode
55 self.technique = material.technique
56 self.shader = material.shader
58 if self.render_mode=='EXTERNAL' and not self.technique:
59 raise Exception("Missing technique with external rendering mode")
60 elif self.render_mode=='CUSTOM' and not self.shader:
61 raise Exception("Missing shader with custom rendering mode")
64 for n in material.node_tree.nodes:
65 if n.type=='OUTPUT_MATERIAL':
70 raise Exception("No material output node found")
72 surface_node, _ = get_linked_node_and_socket(material.node_tree, out_node.inputs["Surface"])
74 if self.render_mode=='BUILTIN':
75 raise Exception("Empty material can't use builtin rendering mode")
77 elif surface_node.type!='BSDF_PRINCIPLED':
78 raise Exception("Unsupported surface node type "+surface_node.type)
82 base_color = self.properties["base_color"] = MaterialProperty((0.8, 0.8, 0.8, 1.0))
83 metalness = self.properties["metalness"] = MaterialProperty(0.0)
84 roughness = self.properties["roughness"] = MaterialProperty(0.5)
85 normal = self.properties["normal"] = MaterialProperty(None)
86 emission = self.properties["emission"] = MaterialProperty((0.0, 0.0, 0.0))
88 base_color.set_from_input(material.node_tree, surface_node.inputs["Base Color"], surface_node.inputs["Alpha"])
89 metalness.set_from_input(material.node_tree, surface_node.inputs["Metallic"])
90 roughness.set_from_input(material.node_tree, surface_node.inputs["Roughness"])
91 normal.set_from_input(material.node_tree, surface_node.inputs["Normal"])
92 emission.set_from_input(material.node_tree, surface_node.inputs["Emission"])
94 sampler_settings = None
95 for p in self.properties.values():
97 settings = (p.texture.default_filter, p.texture.interpolation, p.texture.use_mipmap, p.texture.max_anisotropy)
98 if sampler_settings is None:
99 sampler_settings = settings
100 elif settings!=sampler_settings:
101 raise Exception("Conflicting sampler settings in material textures")
105 def __init__(self, materials):
106 self.render_mode = materials[0].render_mode
107 if self.render_mode=='EXTERNAL':
108 raise Exception("Material map with external render mode does not make sense")
110 self.shader = materials[0].shader
112 self.name = "material_map_"+os.path.splitext(self.shader)[0]
114 self.name = "material_map"
115 self.materials = materials
116 self.material_names = [m.name for m in self.materials]
117 for m in self.materials:
118 if m.render_mode!=self.render_mode:
119 raise Exception("Conflicting render modes in MaterialMap constructor")
120 if self.render_mode=='CUSTOM' and m.shader!=self.shader:
121 raise Exception("Conflicting shaders in MaterialMap constructor")
123 count = len(self.materials)
125 while size*size*2<count:
128 self.size = (size, size)
130 self.size = (size*2, size)
132 from .util import get_colormap
134 cm = get_colormap(True)
135 self.base_color_data = ""
136 for m in map(Material, self.materials):
137 if any(p.texture for p in m.properties):
138 raise Exception("Texturing is incompatible with material map")
139 base_color = [int(cm(c)*255) for c in m.base_color.value]
140 self.base_color_data += "\\x{:02X}\\x{:02X}\\x{:02X}\\xFF".format(*base_color)
141 self.base_color_data += "\\x00\\x00\\x00\\x00"*(self.size[0]*self.size[1]-count)
143 def get_material_uv(self, material):
144 index = self.material_names.index(material.name)
145 x = index%self.size[0]
146 y = index//self.size[0]
147 return ((x+0.5)/self.size[0], (y+0.5)/self.size[1])
149 def create_material_map(context, material):
150 if not material.material_map:
151 raise Exception("Material is not part of a material map")
153 shader = material.shader
155 for m in context.blend_data.materials:
156 if m.material_map and m.shader==shader:
159 mat_map = MaterialMap(materials)