blender/io_mspgl/export_object.py

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