blender/io_mspgl/export_object.py

   1 import os
   2 import mathutils
   3
   4 def linear_to_srgb(l):
   5         if l<0.0031308:
   6                 return 12.92*l
   7         else:
   8                 return 1.055*(l**(1/2.4))-0.055
   9
  10 def get_colormap(srgb):
  11         if srgb:
  12                 return linear_to_srgb
  13         else:
  14                 return lambda x: x
  15
  16 def image_name(i):
  17         fp = i.filepath
  18         if fp:
  19                 return os.path.split(fp)[1]
  20         else:
  21                 return i.name
  22
  23 def external_name(out_file, ext, index):
  24         path, base = os.path.split(out_file.filename)
  25         base = os.path.splitext(base)[0]
  26         if index>0:
  27                 base += "_lod{}".format(index)
  28         return path, base+ext
  29
  30
  31 class ObjectExporter:
  32         def __init__(self):
  33                 self.textures = "REF"
  34                 self.separate_mesh = False
  35                 self.separate_tech = False
  36                 self.shared_resources = True
  37                 self.export_lods = True
  38
  39         def export(self, context, out_file, obj=None, progress=None):
  40                 if obj is None:
  41                         obj = context.active_object
  42
  43                 lods = [obj]
  44                 for c in obj.children:
  45                         if c.lod_for_parent:
  46                                 if c.lod_index>=len(lods):
  47                                         lods += [None]*(c.lod_index+1-len(lods))
  48                                 lods[c.lod_index] = c
  49
  50                 from .outfile import open_output
  51                 out_file = open_output(out_file)
  52
  53                 p1 = max(((v.co, v.co.length) for v in obj.data.vertices), key=lambda x:x[1])[0]
  54                 p2 = max(((v.co, (v.co-p1).length) for v in obj.data.vertices), key=lambda x:x[1])[0]
  55                 center = (p1+p2)/2
  56                 radius = (p1-p2).length/2
  57                 for v in obj.data.vertices:
  58                         d = v.co-center
  59                         if d.length>radius:
  60                                 center += d*(1-radius/d.length)/2
  61                                 radius = (radius+d.length)/2
  62
  63                 out_file.write("bounding_sphere_hint", center[0], center[1], center[2], radius)
  64
  65                 prev_mesh = None
  66                 prev_tech = (None, None)
  67                 for i, l in enumerate(lods):
  68                         if i>0:
  69                                 out_file.begin("level_of_detail", i)
  70
  71                         if i==0 or l.data.name!=prev_mesh:
  72                                 mesh = self.export_object_mesh(context, out_file, l, progress)
  73                                 prev_mesh = l.data.name
  74
  75                         same_tech = True
  76                         mat = None
  77                         if l.material_slots and l.material_slots[0].material:
  78                                 mat = l.material_slots[0].material.name
  79                                 if mat!=prev_tech[1]:
  80                                         same_tech = False
  81                         if l.technique!=prev_tech[0]:
  82                                 same_tech = False
  83                         if i==0 or not same_tech:
  84                                 self.export_object_technique(l, out_file, i)
  85                                 prev_tech = (l.technique, mat)
  86
  87                         if i>0:
  88                                 out_file.end()
  89
  90         def export_object_mesh(self, context, out_file, obj, progress):
  91                 from .export_mesh import MeshExporter
  92                 mesh_export = MeshExporter()
  93                 for k, v in self.__dict__.items():
  94                         setattr(mesh_export, k, v)
  95
  96                 lod_index = 0
  97                 if obj.lod_for_parent:
  98                         lod_index = obj.lod_index
  99
 100                 if self.separate_mesh:
 101                         from .outfile import open_output
 102                         path, name = external_name(out_file, ".mesh", lod_index)
 103                         if self.shared_resources:
 104                                 name = obj.data.name+".mesh"
 105                         mesh_out = open_output(os.path.join(path, name))
 106                         mesh = mesh_export.export(context, mesh_out, obj, progress)
 107                         out_file.write("mesh", '"{}"'.format(name))
 108                 else:
 109                         out_file.begin("mesh")
 110                         mesh = mesh_export.export(context, out_file, obj, progress)
 111                         out_file.end()
 112
 113                 return mesh
 114
 115         def export_object_technique(self, obj, out_file, lod_index):
 116                 material = None
 117                 if obj.material_slots:
 118                         material = obj.material_slots[0].material
 119
 120                 from .outfile import open_output
 121                 path, name = external_name(out_file, ".tech", lod_index)
 122
 123                 if obj.technique:
 124                         if obj.inherit_tech and material and (obj.override_material or material.texture_slots):
 125                                 out_file.begin("technique")
 126                                 out_file.begin("inherit", '"{}"'.format(obj.technique))
 127                                 for slot in material.texture_slots:
 128                                         if slot and slot.texture.type=="IMAGE":
 129                                                 name = image_name(slot.texture.image)
 130                                                 if slot.use_map_color_diffuse:
 131                                                         out_file.write("texture", '"diffuse_map"', '"{}"'.format(name))
 132                                                 elif slot.use_map_normal:
 133                                                         out_file.write("texture", '"normal_map"', '"{}"'.format(name))
 134                                 if obj.override_material:
 135                                         mat_name = material.name+".mat"
 136                                         mat_out = open_output(os.path.join(path, mat_name))
 137                                         self.export_material(material, mat_out)
 138                                         out_file.write("material", '"surface"', '"{}"'.format(mat_name))
 139                                 out_file.end()
 140                                 out_file.end()
 141                         else:
 142                                 out_file.write("technique", '"{}"'.format(obj.technique))
 143                 elif self.separate_tech:
 144                         if self.shared_resources and material:
 145                                 name = material.name+".tech"
 146                         tech_out = open_output(os.path.join(path, name))
 147                         self.export_technique_definition(material, tech_out)
 148                         out_file.write("technique", '"{}"'.format(name))
 149                 else:
 150                         out_file.begin("technique")
 151                         self.export_technique_definition(material, out_file)
 152                         out_file.end()
 153
 154         def export_technique_definition(self, material, out_file):
 155                 out_file.begin("pass", '""')
 156                 if material:
 157                         out_file.begin("material")
 158                         self.export_material(material, out_file)
 159                         out_file.end()
 160
 161                         if self.textures!="NONE":
 162                                 diffuse_tex = None
 163                                 for slot in material.texture_slots:
 164                                         if slot and slot.texture.type=="IMAGE" and slot.use_map_color_diffuse:
 165                                                 diffuse_tex = slot.texture
 166                                                 break
 167
 168                                 if diffuse_tex:
 169                                         out_file.begin("texunit", 0)
 170                                         if self.textures=="INLINE":
 171                                                 out_file.begin("texture2d")
 172                                                 out_file.write("min_filter", "LINEAR")
 173                                                 out_file.write("storage", "RGBA", diffuse_tex.image.size[0], diffuse_tex.image.size[1])
 174                                                 texdata = '"'
 175                                                 for p in diffuse_tex.image.pixels:
 176                                                         texdata += "\\x%02X"%int(p*255)
 177                                                 texdata += '"'
 178                                                 out_file.write("raw_data", texdata)
 179                                                 out_file.end()
 180                                         else:
 181                                                 out_file.write("texture", '"%s"'%image_name(diffuse_tex.image))
 182                                         out_file.end()
 183
 184                 out_file.end()
 185
 186         def export_material(self, mat, out_file):
 187                 cm = get_colormap(mat.srgb_colors)
 188                 if any((s and s.use_map_color_diffuse) for s in mat.texture_slots):
 189                         out_file.write("diffuse", 1.0, 1.0, 1.0, 1.0)
 190                         amb = cm(mat.ambient)
 191                         out_file.write("ambient", amb, amb, amb, 1.0)
 192                 else:
 193                         diff = mat.diffuse_color*mat.diffuse_intensity
 194                         out_file.write("diffuse", cm(diff.r), cm(diff.g), cm(diff.b), 1.0)
 195                         amb = diff*mat.ambient
 196                         out_file.write("ambient", cm(amb.r), cm(amb.g), cm(amb.b), 1.0)
 197                 spec = mat.specular_color*mat.specular_intensity
 198                 out_file.write("specular", spec.r, spec.g, spec.b, 1.0)
 199                 out_file.write("shininess", mat.specular_hardness)