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' and s.texture.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                 textures = {}
  48                 if self.textures!='NONE':
  49                         image_texture_slots = [s for s in material.texture_slots if s and s.texture.type=='IMAGE' and s.texture.image]
  50                         for s in image_texture_slots:
  51                                 if s.use_map_color_diffuse:
  52                                         textures["diffuse_map"] = s.texture
  53                                 elif s.use_map_normal:
  54                                         textures["normal_map"] = s.texture
  55
  56                 if material.technique:
  57                         if not obj.inherit_tech:
  58                                 return []
  59
  60                         st = Statement("inherit", material.technique)
  61                         for s, t in textures.items():
  62                                 st.sub.append(Statement("texture", s, image_name(t.image)))
  63                         if material.override_material:
  64                                 st.sub.append(tech_res.create_reference_statement("material", "surface", mat_res))
  65                         tech_res.statements.append(st)
  66                 else:
  67                         st = Statement("pass", "")
  68                         st.sub.append(tech_res.create_embed_statement("material", mat_res))
  69
  70                         if "diffuse_map" in textures:
  71                                 diffuse_tex = textures["diffuse_map"]
  72                                 ss = Statement("texunit", 0)
  73                                 if self.textures=='INLINE':
  74                                         ss.sub.append(tech_res.create_embed_statement("texture2d", resources[diffuse_tex.name+".tex2d"]))
  75                                 else:
  76                                         ss.sub.append(Statement("texture", image_name(diffuse_tex.image)))
  77                                 st.sub.append(ss)
  78
  79                         tech_res.statements.append(st)
  80
  81                 return tech_res
  82
  83         def export_material(self, material):
  84                 from .datafile import Resource, Statement
  85                 mat_res = Resource(material.name+".mat")
  86                 statements = mat_res.statements
  87
  88                 cm = get_colormap(material.srgb_colors)
  89                 if any(s.use_map_color_diffuse for s in material.texture_slots if s):
  90                         statements.append(Statement("diffuse", 1.0, 1.0, 1.0, 1.0))
  91                         amb = cm(material.ambient)
  92                         statements.append(Statement("ambient", amb, amb, amb, 1.0))
  93                 else:
  94                         diff = material.diffuse_color*material.diffuse_intensity
  95                         statements.append(Statement("diffuse", cm(diff.r), cm(diff.g), cm(diff.b), 1.0))
  96                         amb = diff*material.ambient
  97                         statements.append(Statement("ambient", cm(amb.r), cm(amb.g), cm(amb.b), 1.0))
  98                 spec = material.specular_color*material.specular_intensity
  99                 statements.append(Statement("specular", cm(spec.r), cm(spec.g), cm(spec.g), 1.0))
 100                 statements.append(Statement("shininess", material.specular_hardness))
 101
 102                 return mat_res