+ return center, radius
+
+ def collect_object_lods(self, obj):
+ lods = [obj]
+ lods += sorted([c for c in obj.children if c.lod_for_parent], key=(lambda l: l.lod_index))
+ for i, l in enumerate(lods):
+ if i>0 and l.lod_index!=i:
+ raise Exception("Invalid configuration on object {}: Inconsistent LOD indices".format(obj.name))
+
+ return lods
+
+ def create_mesh_exporter(self):
+ from .export_mesh import MeshExporter
+ mesh_export = MeshExporter()
+ return mesh_export
+
+ def create_material_exporter(self):
+ from .export_material import MaterialExporter
+ material_export = MaterialExporter()
+ return material_export
+
+ def create_material_atlas_exporter(self):
+ from .export_material import MaterialAtlasExporter
+ material_atlas_export = MaterialAtlasExporter()
+ return material_atlas_export
+
+ def export_object_resources(self, context, obj, resources, material_atlases, progress):
+ if material_atlases is None:
+ material_atlases = {}
+
+ lods = self.collect_object_lods(obj)
+
+ from .mesh import create_mesh_from_object
+ from .material import create_material_atlas
+ mesh_export = self.create_mesh_exporter()
+ material_export = self.create_material_exporter()
+ material_atlas_export = self.create_material_atlas_exporter()
+
+ for i, l in enumerate(lods):
+ lod_index = l.lod_index if l.lod_for_parent else 0
+ progress.push_task_slice("LOD {}".format(lod_index), i, len(lods))
+
+ material_atlas = None
+ atlas_flags = [m.render_mode!='EXTERNAL' and m.material_atlas for m in l.data.materials if m]
+ if any(atlas_flags):
+ mmk = lambda m: m.shader if m.render_mode=='CUSTOM' else ""
+ material_atlas_key = mmk(l.data.materials[0])
+ key_mismatch = any(mmk(m)!=material_atlas_key for m in l.data.materials)
+ if not all(atlas_flags) or key_mismatch:
+ raise Exception("Invalid configuration on object {}: Mixed material atlas state")
+
+ if material_atlas_key in material_atlases:
+ material_atlas = material_atlases[material_atlas_key]
+ else:
+ material_atlas = create_material_atlas(context, l.data.materials[0])
+ material_atlases[material_atlas_key] = material_atlas
+
+ tech_name = "{}.tech".format(material_atlas.name)
+ if tech_name not in resources:
+ material_atlas_export.export_technique_resources(material_atlas, resources)
+ resources[tech_name] = material_atlas_export.export_technique(material_atlas, resources)
+ elif l.material_slots and l.material_slots[0].material:
+ material = l.material_slots[0].material
+ if material.render_mode!='EXTERNAL':
+ tech_name = material.name+".tech"
+ if tech_name not in resources:
+ material_export.export_technique_resources(material, resources)
+ resources[tech_name] = material_export.export_technique(material, resources)
+ elif "stub.tech" not in resources:
+ resources["stub.tech"] = self.export_stub_technique()
+
+ mesh_name = l.data.name+".mesh"
+ if mesh_name not in resources:
+ mesh = create_mesh_from_object(context, l, material_atlas, progress)
+ mesh_res = mesh_export.export_mesh(context, mesh, progress)
+ resources[mesh_name] = mesh_res
+
+ progress.pop_task()
+
+ def export_object(self, obj, resources, progress):
+ if obj.type!='MESH':
+ raise ValueError("Object {} is not a mesh".format(obj.name))
+
+ lods = self.collect_object_lods(obj)
+
+ from .datafile import Resource, Statement
+ obj_res = Resource(obj.name+".object", "object")
+ statements = obj_res.statements
+
+ center, radius = self.compute_bounding_sphere(obj)
+ statements.append(Statement("bounding_sphere_hint", *center, radius))