blender/io_mspgl/export_material.py

   1 import os
   2
   3 def linear_to_srgb(l):
   4         if l<0.0031308:
   5                 return 12.92*l
   6         else:
   7                 return 1.055*(l**(1/2.4))-0.055
   8
   9 def get_colormap(srgb):
  10         if srgb:
  11                 return linear_to_srgb
  12         else:
  13                 return lambda x: x
  14
  15
  16 class MaterialExporter:
  17         def __init__(self):
  18                 self.single_file = True
  19                 self.use_textures = True
  20
  21         def create_texture_exporter(self):
  22                 from .export_texture import TextureExporter
  23                 texture_export = TextureExporter()
  24                 texture_export.inline_data = self.single_file
  25                 return texture_export
  26
  27         def export_technique_resources(self, material, resources):
  28                 texture_export = self.create_texture_exporter()
  29
  30                 mat_name = material.name+".mat"
  31                 if mat_name not in resources:
  32                         resources[mat_name] = self.export_material(material)
  33
  34                 if self.use_textures:
  35                         for s in material.texture_slots:
  36                                 if s and s.texture.type=='IMAGE' and s.texture.image:
  37                                         tex_name = s.texture.name+".tex2d"
  38                                         if tex_name not in resources:
  39                                                 resources[tex_name] = texture_export.export_texture(s.texture)
  40
  41         def export_technique(self, material, *, resources):
  42                 from .datafile import Resource, Statement
  43                 tech_res = Resource(material.name+".tech")
  44
  45                 mat_res = resources[material.name+".mat"]
  46                 textures = {}
  47                 if self.use_textures:
  48                         image_texture_slots = [s for s in material.texture_slots if s and s.texture.type=='IMAGE' and s.texture.image]
  49                         for s in image_texture_slots:
  50                                 if s.use_map_color_diffuse:
  51                                         textures["diffuse_map"] = s.texture
  52                                 elif s.use_map_normal:
  53                                         textures["normal_map"] = s.texture
  54
  55                 if material.technique:
  56                         if not obj.inherit_tech:
  57                                 return []
  58
  59                         if self.single_file:
  60                                 raise Exception("Can't export inherited technique to a single file")
  61
  62                         st = Statement("inherit", material.technique)
  63                         for s, t in textures.items():
  64                                 if t.default_filter:
  65                                         st.sub.append(Statement("texture", s, image_name(t.image)))
  66                                 else:
  67                                         st.sub.append(tech_res.create_reference_statement("texture", s, resources[t.name+".tex2d"]))
  68                         if material.override_material:
  69                                 st.sub.append(tech_res.create_reference_statement("material", "surface", mat_res))
  70                         tech_res.statements.append(st)
  71                 else:
  72                         st = Statement("pass", "")
  73                         if self.single_file:
  74                                 st.sub.append(tech_res.create_embed_statement("material", mat_res))
  75                         else:
  76                                 st.sub.append(tech_res.create_reference_statement("material", mat_res))
  77
  78                         if "diffuse_map" in textures:
  79                                 diffuse_tex = textures["diffuse_map"]
  80                                 tex_res = resources[diffuse_tex.name+".tex2d"]
  81                                 ss = Statement("texunit", 0)
  82                                 if self.single_file:
  83                                         ss.sub.append(tech_res.create_embed_statement("texture2d", tex_res))
  84                                 elif not diffuse_tex.default_filter:
  85                                         ss.sub.append(tech_res.create_reference_statement("texture2d", tex_res))
  86                                 else:
  87                                         ss.sub.append(Statement("texture", image_name(diffuse_tex.image)))
  88                                 st.sub.append(ss)
  89
  90                         tech_res.statements.append(st)
  91
  92                 return tech_res
  93
  94         def export_material(self, material):
  95                 from .datafile import Resource, Statement
  96                 mat_res = Resource(material.name+".mat")
  97                 statements = mat_res.statements
  98
  99                 cm = get_colormap(material.srgb_colors)
 100                 if any(s.use_map_color_diffuse for s in material.texture_slots if s):
 101                         statements.append(Statement("diffuse", 1.0, 1.0, 1.0, 1.0))
 102                         amb = cm(material.ambient)
 103                         statements.append(Statement("ambient", amb, amb, amb, 1.0))
 104                 else:
 105                         diff = material.diffuse_color*material.diffuse_intensity
 106                         statements.append(Statement("diffuse", cm(diff.r), cm(diff.g), cm(diff.b), 1.0))
 107                         amb = diff*material.ambient
 108                         statements.append(Statement("ambient", cm(amb.r), cm(amb.g), cm(amb.b), 1.0))
 109                 spec = material.specular_color*material.specular_intensity
 110                 statements.append(Statement("specular", cm(spec.r), cm(spec.g), cm(spec.g), 1.0))
 111                 statements.append(Statement("shininess", material.specular_hardness))
 112
 113                 return mat_res