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.collection = False
  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.use_textures = self.use_textures
  48                 return material_export
  49
  50         def create_material_map_exporter(self):
  51                 from .export_material import MaterialMapExporter
  52                 material_map_export = MaterialMapExporter()
  53                 return material_map_export
  54
  55         def export_to_file(self, context, out_fn):
  56                 obj = context.active_object
  57
  58                 from .util import Progress
  59                 progress = Progress(self.show_progress and context)
  60
  61                 path, base = os.path.split(out_fn)
  62                 base = os.path.splitext(base)[0]
  63
  64                 resources = {}
  65                 self.export_object_resources(context, obj, resources, progress)
  66
  67                 obj_res = self.export_object(context, obj, progress, resources=resources)
  68                 refs = obj_res.collect_references()
  69                 if not self.shared_resources:
  70                         numbers = {}
  71                         for r in refs:
  72                                 ext = os.path.splitext(r.name)[1]
  73                                 n = numbers.get(ext, 0)
  74                                 if n>0:
  75                                         r.name = "{}_{}{}".format(base, n, ext)
  76                                 else:
  77                                         r.name = base+ext
  78                                 numbers[ext] = n+1
  79
  80                 if self.collection:
  81                         obj_res.write_collection(out_fn)
  82                 else:
  83                         for r in refs:
  84                                 r.write_to_file(os.path.join(path, r.name))
  85                         obj_res.write_to_file(out_fn)
  86
  87         def export_object_resources(self, context, obj, resources, progress, material_maps=None):
  88                 if material_maps is None:
  89                         material_maps = {}
  90
  91                 lods = self.collect_object_lods(obj)
  92
  93                 from .mesh import create_mesh_from_object
  94                 from .material import create_material_map
  95                 mesh_export = self.create_mesh_exporter()
  96                 material_export = self.create_material_exporter()
  97                 material_map_export = self.create_material_map_exporter()
  98
  99                 for i, l in enumerate(lods):
 100                         lod_index = l.lod_index if l.lod_for_parent else 0
 101                         progress.push_task_slice("LOD {}".format(lod_index), i, len(lods))
 102
 103                         material_map = None
 104                         mapped_count = sum(m.render_mode!='EXTERNAL' and m.material_map for m in l.data.materials if m)
 105                         if mapped_count:
 106                                 mmk = lambda m: m.shader if m.render_mode=='CUSTOM' else ""
 107                                 material_map_key = mmk(l.data.materials[0])
 108                                 key_mismatch = any(mmk(m)!=material_map_key for m in l.data.materials)
 109                                 if mapped_count!=len(l.data.materials) or key_mismatch:
 110                                         raise Exception("Conflicting settings in object materials")
 111
 112                                 if material_map_key in material_maps:
 113                                         material_map = material_maps[material_map_key]
 114                                 else:
 115                                         material_map = create_material_map(context, l.data.materials[0])
 116                                         material_maps[material_map_key] = material_map
 117
 118                                 tech_name = "{}.tech".format(material_map.name)
 119                                 if tech_name not in resources:
 120                                         material_map_export.export_technique_resources(material_map, resources)
 121                                         resources[tech_name] = material_map_export.export_technique(material_map, resources=resources)
 122                         elif l.material_slots and l.material_slots[0].material:
 123                                 material = l.material_slots[0].material
 124                                 if material.render_mode!='EXTERNAL':
 125                                         tech_name = material.name+".tech"
 126                                         if tech_name not in resources:
 127                                                 material_export.export_technique_resources(material, resources)
 128                                                 resources[tech_name] = material_export.export_technique(material, resources=resources)
 129                         elif "stub.tech" not in resources:
 130                                 resources["stub.tech"] = self.export_stub_technique()
 131
 132                         mesh_name = l.data.name+".mesh"
 133                         if mesh_name not in resources:
 134                                 mesh = create_mesh_from_object(context, l, progress, material_map=material_map)
 135                                 mesh_res = mesh_export.export_mesh(context, mesh, progress)
 136                                 resources[mesh_name] = mesh_res
 137
 138                         progress.pop_task()
 139
 140         def export_object(self, context, obj, progress, *, resources=None):
 141                 if resources is None:
 142                         resources = {}
 143                         self.export_object_resources(context, obj, resources, progress)
 144
 145                 lods = self.collect_object_lods(obj)
 146
 147                 from .datafile import Resource, Statement
 148                 obj_res = Resource(obj.name+".object", "object")
 149                 statements = obj_res.statements
 150
 151                 center, radius = self.compute_bounding_sphere(obj)
 152                 statements.append(Statement("bounding_sphere_hint", *center, radius))
 153
 154                 prev_mesh = None
 155                 prev_tech = None
 156                 for i, l in enumerate(lods):
 157                         lod_st = []
 158
 159                         if l.data.name!=prev_mesh:
 160                                 mesh_res = resources[l.data.name+".mesh"]
 161                                 lod_st.append(obj_res.create_reference_statement("mesh", mesh_res))
 162
 163                                 prev_mesh = l.data.name
 164
 165                         material = None
 166                         if l.material_slots:
 167                                 material = l.material_slots[0].material
 168                         if material:
 169                                 if material.material_map:
 170                                         tech_res = resources["material_map_{}.tech".format(os.path.splitext(material.technique)[0])]
 171                                 else:
 172                                         tech_res = resources[material.name+".tech"]
 173                         else:
 174                                 tech_res = resources["stub.tech"]
 175
 176                         if tech_res.name!=prev_tech:
 177                                 if material and material.render_mode=='EXTERNAL':
 178                                         lod_st.append(Statement("technique", material.technique))
 179                                 else:
 180                                         lod_st.append(obj_res.create_reference_statement("technique", tech_res))
 181                                 prev_tech = tech_res.name
 182
 183                         if i>0:
 184                                 st = Statement("level_of_detail", i)
 185                                 st.sub = lod_st
 186                                 statements.append(st)
 187                         else:
 188                                 statements += lod_st
 189
 190                 progress.set_progress(1.0)
 191
 192                 return obj_res
 193
 194         def export_stub_technique(self):
 195                 from .datafile import Resource, Statement
 196                 tech_res = Resource("stub.tech", "technique")
 197                 pass_st = Statement("pass", "")
 198                 tech_res.statements.append(pass_st)
 199                 mat_st = Statement("material")
 200                 pass_st.sub.append(mat_st)
 201                 mat_st.sub.append(Statement("basic"))
 202                 return tech_res