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 def image_name(i):
  16         fp = i.filepath
  17         if fp:
  18                 return os.path.split(fp)[1]
  19         else:
  20                 return i.name
  21
  22
  23 class MaterialExporter:
  24         def __init__(self):
  25                 self.textures = 'REF'
  26
  27         def export_technique_resources(self, material, resources):
  28                 from .export_texture import TextureExporter
  29                 texture_export = TextureExporter()
  30
  31                 mat_name = material.name+".mat"
  32                 if mat_name not in resources:
  33                         resources[mat_name] = self.export_material(material)
  34
  35                 if self.textures=='INLINE':
  36                         for s in material.texture_slots:
  37                                 if s and s.texture.type=='IMAGE':
  38                                         tex_name = s.texture.name+".tex2d"
  39                                         if tex_name not in resources:
  40                                                 resources[tex_name] = texture_export.export_texture(s.texture)
  41
  42         def export_technique(self, material, *, resources):
  43                 from .datafile import Resource, Statement
  44                 tech_res = Resource(material.name+".tech")
  45
  46                 mat_res = resources[material.name+".mat"]
  47                 image_texture_slots = [s for s in material.texture_slots if s and s.texture.type=='IMAGE']
  48
  49                 if material.technique:
  50                         if not obj.inherit_tech:
  51                                 return []
  52
  53                         st = Statement("inherit", material.technique)
  54                         for slot in image_texture_slots:
  55                                 name = image_name(slot.texture.image)
  56                                 if slot.use_map_color_diffuse:
  57                                         st.sub.append(Statement("texture", "diffuse_map", name))
  58                                 elif slot.use_map_normal:
  59                                         st.sub.append(Statement("texture", "normal_map", name))
  60                         if material.override_material:
  61                                 st.sub.append(tech_res.create_reference_statement("material", "surface", mat_res))
  62                         tech_res.statements.append(st)
  63                 else:
  64                         st = Statement("pass", "")
  65                         st.sub.append(tech_res.create_embed_statement("material", mat_res))
  66
  67                         if self.textures!='NONE':
  68                                 diffuse_tex = None
  69                                 for slot in image_texture_slots:
  70                                         if slot.use_map_color_diffuse:
  71                                                 diffuse_tex = slot.texture
  72                                                 break
  73
  74                                 if diffuse_tex:
  75                                         ss = Statement("texunit", 0)
  76                                         if self.textures=='INLINE':
  77                                                 tex_res = resources[slot.texture.name+".tex2d"]
  78                                                 ss.sub.append(tech_res.create_embed_statement("texture2d", tex_res))
  79                                         elif tex.image:
  80                                                 ss.sub.append(Statement("texture", image_name(tex.image)))
  81                                         st.sub.append(ss)
  82
  83                         tech_res.statements.append(st)
  84
  85                 return tech_res
  86
  87         def export_material(self, material):
  88                 from .datafile import Resource, Statement
  89                 mat_res = Resource(material.name+".mat")
  90                 statements = mat_res.statements
  91
  92                 cm = get_colormap(material.srgb_colors)
  93                 if any(s.use_map_color_diffuse for s in material.texture_slots if s):
  94                         statements.append(Statement("diffuse", 1.0, 1.0, 1.0, 1.0))
  95                         amb = cm(material.ambient)
  96                         statements.append(Statement("ambient", amb, amb, amb, 1.0))
  97                 else:
  98                         diff = material.diffuse_color*material.diffuse_intensity
  99                         statements.append(Statement("diffuse", cm(diff.r), cm(diff.g), cm(diff.b), 1.0))
 100                         amb = diff*material.ambient
 101                         statements.append(Statement("ambient", cm(amb.r), cm(amb.g), cm(amb.b), 1.0))
 102                 spec = material.specular_color*material.specular_intensity
 103                 statements.append(Statement("specular", cm(spec.r), cm(spec.g), cm(spec.g), 1.0))
 104                 statements.append(Statement("shininess", material.specular_hardness))
 105
 106                 return mat_res