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.export_all = False
  11                 self.collection = False
  12                 self.shared_resources = True
  13                 self.export_lods = True
  14
  15         def compute_bounding_sphere(self, obj):
  16                 p1 = max(((v.co, v.co.length) for v in obj.data.vertices), key=lambda x:x[1])[0]
  17                 p2 = max(((v.co, (v.co-p1).length) for v in obj.data.vertices), key=lambda x:x[1])[0]
  18                 center = (p1+p2)/2
  19                 radius = (p1-p2).length/2
  20                 for v in obj.data.vertices:
  21                         d = v.co-center
  22                         if d.length>radius:
  23                                 center += d*(1-radius/d.length)/2
  24                                 radius = (radius+d.length)/2
  25
  26                 return center, radius
  27
  28         def collect_object_lods(self, obj):
  29                 lods = [obj]
  30                 if self.export_lods:
  31                         lods += sorted([c for c in obj.children if c.lod_for_parent], key=(lambda l: l.lod_index))
  32                         for i, l in enumerate(lods):
  33                                 if i>0 and l.lod_index!=i:
  34                                         raise Exception("Inconsistent LOD indices")
  35
  36                 return lods
  37
  38         def create_mesh_exporter(self):
  39                 from .export_mesh import MeshExporter
  40                 mesh_export = MeshExporter()
  41                 mesh_export.use_strips = self.use_strips
  42                 mesh_export.use_degen_tris = self.use_degen_tris
  43                 return mesh_export
  44
  45         def create_material_exporter(self):
  46                 from .export_material import MaterialExporter
  47                 material_export = MaterialExporter()
  48                 material_export.use_textures = self.use_textures
  49                 return material_export
  50
  51         def create_material_atlas_exporter(self):
  52                 from .export_material import MaterialAtlasExporter
  53                 material_atlas_export = MaterialAtlasExporter()
  54                 return material_atlas_export
  55
  56         def export_to_file(self, context, out_fn):
  57                 if self.export_all:
  58                         objs = [o for o in context.selected_objects if o.type=="MESH"]
  59                 else:
  60                         objs = [context.active_object]
  61
  62                 from .util import Progress
  63                 progress = Progress(self.show_progress and context)
  64
  65                 path, base = os.path.split(out_fn)
  66                 base, ext = os.path.splitext(base)
  67
  68                 resources = {}
  69                 for i, obj in enumerate(objs):
  70                         if self.export_all:
  71                                 out_fn = os.path.join(path, obj.name+ext)
  72
  73                         progress.push_task_slice(obj.name, i, len(objs))
  74                         self.export_object_resources(context, obj, resources, progress)
  75
  76                         obj_res = self.export_object(context, obj, progress, resources=resources)
  77                         refs = obj_res.collect_references()
  78                         if not self.shared_resources:
  79                                 numbers = {}
  80                                 for r in refs:
  81                                         res_ext = os.path.splitext(r.name)[1]
  82                                         n = numbers.get(res_ext, 0)
  83                                         if n>0:
  84                                                 r.name = "{}_{}{}".format(base, n, res_ext)
  85                                         else:
  86                                                 r.name = base+res_ext
  87                                         numbers[res_ext] = n+1
  88
  89                         if self.collection:
  90                                 obj_res.write_collection(out_fn)
  91                         else:
  92                                 for r in refs:
  93                                         r.write_to_file(os.path.join(path, r.name))
  94                                 obj_res.write_to_file(out_fn)
  95
  96                         progress.pop_task()
  97
  98         def export_object_resources(self, context, obj, resources, progress, material_atlass=None):
  99                 if material_atlass is None:
 100                         material_atlass = {}
 101
 102                 lods = self.collect_object_lods(obj)
 103
 104                 from .mesh import create_mesh_from_object
 105                 from .material import create_material_atlas
 106                 mesh_export = self.create_mesh_exporter()
 107                 material_export = self.create_material_exporter()
 108                 material_atlas_export = self.create_material_atlas_exporter()
 109
 110                 for i, l in enumerate(lods):
 111                         lod_index = l.lod_index if l.lod_for_parent else 0
 112                         progress.push_task_slice("LOD {}".format(lod_index), i, len(lods))
 113
 114                         material_atlas = None
 115                         atlas_flags = [m.render_mode!='EXTERNAL' and m.material_atlas for m in l.data.materials if m]
 116                         if any(atlas_flags):
 117                                 mmk = lambda m: m.shader if m.render_mode=='CUSTOM' else ""
 118                                 material_atlas_key = mmk(l.data.materials[0])
 119                                 key_mismatch = any(mmk(m)!=material_atlas_key for m in l.data.materials)
 120                                 if not all(atlas_flags) or key_mismatch:
 121                                         raise Exception("Conflicting settings in object materials")
 122
 123                                 if material_atlas_key in material_atlass:
 124                                         material_atlas = material_atlass[material_atlas_key]
 125                                 else:
 126                                         material_atlas = create_material_atlas(context, l.data.materials[0])
 127                                         material_atlass[material_atlas_key] = material_atlas
 128
 129                                 tech_name = "{}.tech".format(material_atlas.name)
 130                                 if tech_name not in resources:
 131                                         material_atlas_export.export_technique_resources(material_atlas, resources)
 132                                         resources[tech_name] = material_atlas_export.export_technique(material_atlas, resources=resources)
 133                         elif l.material_slots and l.material_slots[0].material:
 134                                 material = l.material_slots[0].material
 135                                 if material.render_mode!='EXTERNAL':
 136                                         tech_name = material.name+".tech"
 137                                         if tech_name not in resources:
 138                                                 material_export.export_technique_resources(material, resources)
 139                                                 resources[tech_name] = material_export.export_technique(material, resources=resources)
 140                         elif "stub.tech" not in resources:
 141                                 resources["stub.tech"] = self.export_stub_technique()
 142
 143                         mesh_name = l.data.name+".mesh"
 144                         if mesh_name not in resources:
 145                                 mesh = create_mesh_from_object(context, l, progress, material_atlas=material_atlas)
 146                                 mesh_res = mesh_export.export_mesh(context, mesh, progress)
 147                                 resources[mesh_name] = mesh_res
 148
 149                         progress.pop_task()
 150
 151         def export_object(self, context, obj, progress, *, resources=None):
 152                 if resources is None:
 153                         resources = {}
 154                         self.export_object_resources(context, obj, resources, progress)
 155
 156                 lods = self.collect_object_lods(obj)
 157
 158                 from .datafile import Resource, Statement
 159                 obj_res = Resource(obj.name+".object", "object")
 160                 statements = obj_res.statements
 161
 162                 center, radius = self.compute_bounding_sphere(obj)
 163                 statements.append(Statement("bounding_sphere_hint", *center, radius))
 164
 165                 prev_mesh = None
 166                 prev_tech = None
 167                 for i, l in enumerate(lods):
 168                         lod_st = []
 169
 170                         if l.data.name!=prev_mesh:
 171                                 mesh_res = resources[l.data.name+".mesh"]
 172                                 lod_st.append(obj_res.create_reference_statement("mesh", mesh_res))
 173
 174                                 prev_mesh = l.data.name
 175
 176                         material = None
 177                         if l.material_slots:
 178                                 material = l.material_slots[0].material
 179                         if material:
 180                                 if material.render_mode=='EXTERNAL':
 181                                         tech_name = material.technique
 182                                 elif material.material_atlas:
 183                                         tech_name = "material_atlas_{}.tech".format(os.path.splitext(material.technique)[0])
 184                                 else:
 185                                         tech_name = material.name+".tech"
 186                         else:
 187                                 tech_name = "stub.tech"
 188
 189                         if tech_name!=prev_tech:
 190                                 if material and material.render_mode=='EXTERNAL':
 191                                         lod_st.append(Statement("technique", material.technique))
 192                                 else:
 193                                         lod_st.append(obj_res.create_reference_statement("technique", resources[tech_name]))
 194                                 prev_tech = tech_name
 195
 196                         if i>0:
 197                                 st = Statement("level_of_detail", i)
 198                                 st.sub = lod_st
 199                                 statements.append(st)
 200                         else:
 201                                 statements += lod_st
 202
 203                 progress.set_progress(1.0)
 204
 205                 return obj_res
 206
 207         def export_stub_technique(self):
 208                 from .datafile import Resource, Statement
 209                 tech_res = Resource("stub.tech", "technique")
 210                 pass_st = Statement("pass", "")
 211                 tech_res.statements.append(pass_st)
 212                 mat_st = Statement("material")
 213                 pass_st.sub.append(mat_st)
 214                 mat_st.sub.append(Statement("basic"))
 215                 return tech_res