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 export_to_file(self, context, out_fn):
  52                 obj = context.active_object
  53
  54                 from .util import Progress
  55                 progress = Progress(self.show_progress and context)
  56
  57                 path, base = os.path.split(out_fn)
  58                 base = os.path.splitext(base)[0]
  59
  60                 resources = {}
  61                 self.export_object_resources(context, obj, resources, progress)
  62
  63                 obj_res = self.export_object(context, obj, progress, resources=resources)
  64                 refs = obj_res.collect_references()
  65                 if not self.shared_resources:
  66                         numbers = {}
  67                         for r in refs:
  68                                 ext = os.path.splitext(r.name)[1]
  69                                 n = numbers.get(ext, 0)
  70                                 if n>0:
  71                                         r.name = "{}_{}{}".format(base, n, ext)
  72                                 else:
  73                                         r.name = base+ext
  74                                 numbers[ext] = n+1
  75
  76                 for r in refs:
  77                         with open(os.path.join(path, r.name), "w") as out_file:
  78                                 for s in r.statements:
  79                                         s.write_to_file(out_file)
  80
  81                 with open(out_fn, "w") as out_file:
  82                         for s in obj_res.statements:
  83                                 s.write_to_file(out_file)
  84
  85         def export_object_resources(self, context, obj, resources, progress):
  86                 lods = self.collect_object_lods(obj)
  87
  88                 from .mesh import create_mesh_from_object
  89                 mesh_export = self.create_mesh_exporter()
  90                 material_export = self.create_material_exporter()
  91
  92                 for i, l in enumerate(lods):
  93                         lod_index = l.lod_index if l.lod_for_parent else 0
  94                         progress.push_task_slice("LOD {}".format(lod_index), i, len(lods))
  95
  96                         mesh_name = l.data.name+".mesh"
  97                         if mesh_name not in resources:
  98                                 mesh = create_mesh_from_object(context, l, progress)
  99                                 mesh_res = mesh_export.export_mesh(context, mesh, progress)
 100                                 resources[mesh_name] = mesh_res
 101
 102                         if l.material_slots and l.material_slots[0].material:
 103                                 material = l.material_slots[0].material
 104                                 tech_name = material.name+".tech"
 105                                 if tech_name not in resources:
 106                                         material_export.export_technique_resources(material, resources)
 107                                         resources[tech_name] = material_export.export_technique(material, resources=resources)
 108                         elif "stub.tech" not in resources:
 109                                 resources["stub.tech"] = self.export_stub_technique()
 110
 111                         progress.pop_task()
 112
 113         def export_object(self, context, obj, progress, *, resources=None):
 114                 if resources is None:
 115                         resources = {}
 116                         self.export_object_resources(context, obj, resources, progress)
 117
 118                 lods = self.collect_object_lods(obj)
 119
 120                 from .datafile import Resource, Statement
 121                 obj_res = Resource(obj.name+".object")
 122                 statements = obj_res.statements
 123
 124                 center, radius = self.compute_bounding_sphere(obj)
 125                 statements.append(Statement("bounding_sphere_hint", *center, radius))
 126
 127                 prev_mesh = None
 128                 prev_tech = None
 129                 for i, l in enumerate(lods):
 130                         lod_st = []
 131
 132                         if l.data.name!=prev_mesh:
 133                                 mesh_res = resources[l.data.name+".mesh"]
 134                                 if not self.single_file:
 135                                         lod_st.append(obj_res.create_reference_statement("mesh", mesh_res))
 136                                 else:
 137                                         lod_st.append(obj_res.create_embed_statement("mesh", mesh_res))
 138
 139                                 prev_mesh = l.data.name
 140
 141                         material = None
 142                         if l.material_slots:
 143                                 material = l.material_slots[0].material
 144                         if material:
 145                                 tech_res = resources[material.name+".tech"]
 146                         else:
 147                                 tech_res = resources["stub.tech"]
 148
 149                         if tech_res.name!=prev_tech:
 150                                 if material and material.technique and not material.inherit_tech:
 151                                         lod_st.append(Statement("technique", material.technique))
 152                                 elif not self.single_file:
 153                                         lod_st.append(obj_res.create_reference_statement("technique", tech_res))
 154                                 else:
 155                                         lod_st.append(obj_res.create_embed_statement("technique", tech_res))
 156                                 prev_tech = tech_res.name
 157
 158                         if i>0:
 159                                 st = Statement("level_of_detail", i)
 160                                 st.sub = lod_st
 161                                 statements.append(st)
 162                         else:
 163                                 statements += lod_st
 164
 165                 progress.set_progress(1.0)
 166
 167                 return obj_res
 168
 169         def export_stub_technique(self):
 170                 from .datafile import Resource, Statement
 171                 tech_res = Resource("stub.tech")
 172                 tech_res.statements.append(Statement("pass", ""))
 173                 return tech_res