blender/io_mspgl/export_object.py

   1 import os
   2 import mathutils
   3
   4 class ObjectExporter:
   5         def collect_object_lods(self, obj):
   6                 lods = [obj]
   7                 lods += sorted([c for c in obj.children if c.lod_for_parent], key=(lambda l: l.lod_index))
   8                 for i, l in enumerate(lods):
   9                         if i>0 and l.lod_index!=i:
  10                                 raise Exception("Invalid configuration on object {}: Inconsistent LOD indices".format(obj.name))
  11
  12                 return lods
  13
  14         def export_object_resources(self, ctx, obj, resources, material_atlases):
  15                 if material_atlases is None:
  16                         material_atlases = {}
  17
  18                 lods = self.collect_object_lods(obj)
  19
  20                 from .export_mesh import MeshExporter
  21                 from .export_material import MaterialAtlasExporter, MaterialExporter
  22                 from .mesh import create_mesh_from_object
  23                 from .material import Material, create_material_atlas
  24                 mesh_export = MeshExporter()
  25                 material_export = MaterialExporter()
  26                 material_atlas_export = MaterialAtlasExporter()
  27
  28                 ctx.set_slices(len(lods))
  29                 for l in lods:
  30                         lod_index = l.lod_index if l.lod_for_parent else 0
  31                         task = ctx.next_slice("LOD {}".format(lod_index))
  32
  33                         material_atlas = None
  34                         atlas_flags = [m.render_mode!='EXTERNAL' and m.material_atlas for m in l.data.materials if m]
  35                         if any(atlas_flags):
  36                                 mmk = lambda m: m.shader if m.render_mode=='CUSTOM' else ""
  37                                 material_atlas_key = mmk(l.data.materials[0])
  38                                 key_mismatch = any(mmk(m)!=material_atlas_key for m in l.data.materials)
  39                                 if not all(atlas_flags) or key_mismatch:
  40                                         raise Exception("Invalid configuration on object {}: Mixed material atlas state")
  41
  42                                 if material_atlas_key in material_atlases:
  43                                         material_atlas = material_atlases[material_atlas_key]
  44                                 else:
  45                                         material_atlas = create_material_atlas(task.context, l.data.materials[0])
  46                                         material_atlases[material_atlas_key] = material_atlas
  47
  48                                 tech_name = "{}.tech".format(material_atlas.name)
  49                                 if tech_name not in resources:
  50                                         material_atlas_export.export_technique_resources(material_atlas, resources)
  51                                         resources[tech_name] = material_atlas_export.export_technique(material_atlas, resources)
  52                         elif l.material_slots and l.material_slots[0].material:
  53                                 material = l.material_slots[0].material
  54                                 subtask = task.task(material, 0.1)
  55                                 if material.render_mode!='EXTERNAL':
  56                                         tech_name = material.name+".tech"
  57                                         if tech_name not in resources:
  58                                                 material = Material(material)
  59                                                 material_export.export_technique_resources(subtask, material, resources)
  60                                                 resources[tech_name] = material_export.export_technique(material, resources)
  61                         elif "stub.tech" not in resources:
  62                                 resources["stub.tech"] = self.export_stub_technique()
  63
  64                         mesh_name = l.data.name+".mesh"
  65                         if mesh_name not in resources:
  66                                 subtask = task.task(l, 1.0)
  67                                 mesh = create_mesh_from_object(subtask, l, material_atlas)
  68                                 mesh_res = mesh_export.export_mesh(subtask, mesh)
  69                                 resources[mesh_name] = mesh_res
  70
  71         def export_object(self, obj, resources):
  72                 if obj.type!='MESH':
  73                         raise ValueError("Object {} is not a mesh".format(obj.name))
  74
  75                 lods = self.collect_object_lods(obj)
  76
  77                 from .datafile import Resource, Statement
  78                 obj_res = Resource(obj.name+".object", "object")
  79                 statements = obj_res.statements
  80
  81                 from .util import compute_bounding_sphere
  82                 center, radius = compute_bounding_sphere([v.co for v in obj.data.vertices])
  83                 statements.append(Statement("bounding_sphere_hint", *center, radius))
  84
  85                 prev_mesh = None
  86                 prev_tech = None
  87                 for i, l in enumerate(lods):
  88                         lod_st = []
  89
  90                         if l.data.name!=prev_mesh:
  91                                 mesh_res = resources[l.data.name+".mesh"]
  92                                 lod_st.append(obj_res.create_reference_statement("mesh", mesh_res))
  93
  94                                 prev_mesh = l.data.name
  95
  96                         material = None
  97                         if l.material_slots:
  98                                 material = l.material_slots[0].material
  99                         if material:
 100                                 if material.render_mode=='EXTERNAL':
 101                                         tech_name = material.technique
 102                                 elif material.material_atlas:
 103                                         tech_name = "material_atlas_{}.tech".format(os.path.splitext(material.technique)[0])
 104                                 else:
 105                                         tech_name = material.name+".tech"
 106                         else:
 107                                 tech_name = "stub.tech"
 108
 109                         if tech_name!=prev_tech:
 110                                 if material and material.render_mode=='EXTERNAL':
 111                                         lod_st.append(Statement("technique", material.technique))
 112                                 else:
 113                                         lod_st.append(obj_res.create_reference_statement("technique", resources[tech_name]))
 114                                 prev_tech = tech_name
 115
 116                         if i>0:
 117                                 st = Statement("level_of_detail", i)
 118                                 st.sub = lod_st
 119                                 statements.append(st)
 120                         else:
 121                                 statements += lod_st
 122
 123                 return obj_res
 124
 125         def export_stub_technique(self):
 126                 from .datafile import Resource, Statement, Token
 127                 tech_res = Resource("stub.tech", "technique")
 128                 pass_st = Statement("method", "")
 129                 tech_res.statements.append(pass_st)
 130                 mat_st = Statement("material")
 131                 pass_st.sub.append(mat_st)
 132                 mat_st.sub.append(Statement("type", Token("basic")))
 133                 return tech_res