blender/io_mspgl/export_object.py

   1 import os
   2 import mathutils
   3
   4 class ObjectExporter:
   5         def __init__(self):
   6                 self.show_progress = True
   7                 self.use_strips = True
   8                 self.use_degen_tris = False
   9                 self.use_textures = True
  10                 self.single_file = True
  11                 self.shared_resources = True
  12                 self.export_lods = True
  13
  14         def compute_bounding_sphere(self, obj):
  15                 p1 = max(((v.co, v.co.length) for v in obj.data.vertices), key=lambda x:x[1])[0]
  16                 p2 = max(((v.co, (v.co-p1).length) for v in obj.data.vertices), key=lambda x:x[1])[0]
  17                 center = (p1+p2)/2
  18                 radius = (p1-p2).length/2
  19                 for v in obj.data.vertices:
  20                         d = v.co-center
  21                         if d.length>radius:
  22                                 center += d*(1-radius/d.length)/2
  23                                 radius = (radius+d.length)/2
  24
  25                 return center, radius
  26
  27         def collect_object_lods(self, obj):
  28                 lods = [obj]
  29                 if self.export_lods:
  30                         lods += sorted([c for c in obj.children if c.lod_for_parent], key=(lambda l: l.lod_index))
  31                         for i, l in enumerate(lods):
  32                                 if i>0 and l.lod_index!=i:
  33                                         raise Exception("Inconsistent LOD indices")
  34
  35                 return lods
  36
  37         def create_mesh_exporter(self):
  38                 from .export_mesh import MeshExporter
  39                 mesh_export = MeshExporter()
  40                 mesh_export.use_strips = self.use_strips
  41                 mesh_export.use_degen_tris = self.use_degen_tris
  42                 return mesh_export
  43
  44         def create_material_exporter(self):
  45                 from .export_material import MaterialExporter
  46                 material_export = MaterialExporter()
  47                 material_export.single_file = self.single_file
  48                 material_export.use_textures = self.use_textures
  49                 return material_export
  50
  51         def create_material_map_exporter(self):
  52                 from .export_material import MaterialMapExporter
  53                 material_map_export = MaterialMapExporter()
  54                 material_map_export.single_file = self.single_file
  55                 return material_map_export
  56
  57         def export_to_file(self, context, out_fn):
  58                 obj = context.active_object
  59
  60                 from .util import Progress
  61                 progress = Progress(self.show_progress and context)
  62
  63                 path, base = os.path.split(out_fn)
  64                 base = os.path.splitext(base)[0]
  65
  66                 resources = {}
  67                 self.export_object_resources(context, obj, resources, progress)
  68
  69                 obj_res = self.export_object(context, obj, progress, resources=resources)
  70                 refs = obj_res.collect_references()
  71                 if not self.shared_resources:
  72                         numbers = {}
  73                         for r in refs:
  74                                 ext = os.path.splitext(r.name)[1]
  75                                 n = numbers.get(ext, 0)
  76                                 if n>0:
  77                                         r.name = "{}_{}{}".format(base, n, ext)
  78                                 else:
  79                                         r.name = base+ext
  80                                 numbers[ext] = n+1
  81
  82                 for r in refs:
  83                         with open(os.path.join(path, r.name), "w") as out_file:
  84                                 for s in r.statements:
  85                                         s.write_to_file(out_file)
  86
  87                 with open(out_fn, "w") as out_file:
  88                         for s in obj_res.statements:
  89                                 s.write_to_file(out_file)
  90
  91         def export_object_resources(self, context, obj, resources, progress, material_maps=None):
  92                 if material_maps is None:
  93                         material_maps = {}
  94
  95                 lods = self.collect_object_lods(obj)
  96
  97                 from .mesh import create_mesh_from_object
  98                 from .material import create_material_map
  99                 mesh_export = self.create_mesh_exporter()
 100                 material_export = self.create_material_exporter()
 101                 material_map_export = self.create_material_map_exporter()
 102
 103                 for i, l in enumerate(lods):
 104                         lod_index = l.lod_index if l.lod_for_parent else 0
 105                         progress.push_task_slice("LOD {}".format(lod_index), i, len(lods))
 106
 107                         material_map = None
 108                         mapped_count = sum(m.material_map for m in l.data.materials if m)
 109                         if mapped_count:
 110                                 material_map_tech = l.data.materials[0].technique
 111                                 tech_mismatch = any(m.technique!=material_map_tech for m in l.data.materials)
 112                                 if mapped_count!=len(l.data.materials) or tech_mismatch:
 113                                         raise Exception("Conflicting settings in object materials")
 114
 115                                 if material_map_tech in material_maps:
 116                                         material_map = material_maps[material_map_tech]
 117                                 else:
 118                                         material_map = create_material_map(context, l.data.materials[0])
 119                                         material_maps[material_map_tech] = material_map
 120
 121                                 tech_name = "material_map_{}.tech".format(os.path.splitext(material_map_tech)[0])
 122                                 if tech_name not in resources:
 123                                         material_map_export.export_technique_resources(material_map, resources)
 124                                         resources[tech_name] = material_map_export.export_technique(material_map, resources=resources)
 125                         elif l.material_slots and l.material_slots[0].material:
 126                                 material = l.material_slots[0].material
 127                                 tech_name = material.name+".tech"
 128                                 if tech_name not in resources:
 129                                         material_export.export_technique_resources(material, resources)
 130                                         resources[tech_name] = material_export.export_technique(material, resources=resources)
 131                         elif "stub.tech" not in resources:
 132                                 resources["stub.tech"] = self.export_stub_technique()
 133
 134                         mesh_name = l.data.name+".mesh"
 135                         if mesh_name not in resources:
 136                                 mesh = create_mesh_from_object(context, l, progress, material_map=material_map)
 137                                 mesh_res = mesh_export.export_mesh(context, mesh, progress)
 138                                 resources[mesh_name] = mesh_res
 139
 140                         progress.pop_task()
 141
 142         def export_object(self, context, obj, progress, *, resources=None):
 143                 if resources is None:
 144                         resources = {}
 145                         self.export_object_resources(context, obj, resources, progress)
 146
 147                 lods = self.collect_object_lods(obj)
 148
 149                 from .datafile import Resource, Statement
 150                 obj_res = Resource(obj.name+".object")
 151                 statements = obj_res.statements
 152
 153                 center, radius = self.compute_bounding_sphere(obj)
 154                 statements.append(Statement("bounding_sphere_hint", *center, radius))
 155
 156                 prev_mesh = None
 157                 prev_tech = None
 158                 for i, l in enumerate(lods):
 159                         lod_st = []
 160
 161                         if l.data.name!=prev_mesh:
 162                                 mesh_res = resources[l.data.name+".mesh"]
 163                                 if not self.single_file:
 164                                         lod_st.append(obj_res.create_reference_statement("mesh", mesh_res))
 165                                 else:
 166                                         lod_st.append(obj_res.create_embed_statement("mesh", mesh_res))
 167
 168                                 prev_mesh = l.data.name
 169
 170                         material = None
 171                         if l.material_slots:
 172                                 material = l.material_slots[0].material
 173                         if material:
 174                                 if material.material_map:
 175                                         tech_res = resources["material_map_{}.tech".format(os.path.splitext(material.technique)[0])]
 176                                 else:
 177                                         tech_res = resources[material.name+".tech"]
 178                         else:
 179                                 tech_res = resources["stub.tech"]
 180
 181                         if tech_res.name!=prev_tech:
 182                                 if material and not material.material_map and material.technique and not material.inherit_tech:
 183                                         lod_st.append(Statement("technique", material.technique))
 184                                 elif not self.single_file:
 185                                         lod_st.append(obj_res.create_reference_statement("technique", tech_res))
 186                                 else:
 187                                         lod_st.append(obj_res.create_embed_statement("technique", tech_res))
 188                                 prev_tech = tech_res.name
 189
 190                         if i>0:
 191                                 st = Statement("level_of_detail", i)
 192                                 st.sub = lod_st
 193                                 statements.append(st)
 194                         else:
 195                                 statements += lod_st
 196
 197                 progress.set_progress(1.0)
 198
 199                 return obj_res
 200
 201         def export_stub_technique(self):
 202                 from .datafile import Resource, Statement
 203                 tech_res = Resource("stub.tech")
 204                 tech_res.statements.append(Statement("pass", ""))
 205                 return tech_res