blender/io_mspgl/scene.py

   1 import itertools
   2 import bpy
   3 import mathutils
   4
   5 def is_same_object(obj1, obj2):
   6         if obj1.data.name!=obj2.data.name:
   7                 return False
   8         if any(m1.name!=m2.name for m1, m2 in zip(obj1.material_slots, obj2.material_slots)):
   9                 return False
  10
  11         return True
  12
  13 class Instance:
  14         def __init__(self, obj, prototype):
  15                 if type(obj)==bpy.types.DepsgraphObjectInstance:
  16                         self.name = None
  17                         self.matrix_world = mathutils.Matrix(obj.matrix_world)
  18                         self.rotation_mode = prototype.rotation_mode
  19                         self.prototype = bpy.data.objects[prototype.name]
  20                 else:
  21                         self.name = obj.name
  22                         self.matrix_world = obj.matrix_world
  23                         self.rotation_mode = obj.rotation_mode
  24                         self.prototype = prototype
  25
  26 class Scene:
  27         def __init__(self, scene, obj_filter=None):
  28                 self.name = scene.name
  29                 self.export_disposition = scene.export_disposition
  30                 self.background_set = None
  31                 self.camera = scene.camera
  32                 self.prototypes = []
  33                 self.instances = []
  34                 self.blended_instances = []
  35                 self.lights = []
  36                 self.realtime_sky = False
  37                 self.sun_light = None
  38                 self.ambient_light = mathutils.Color((0.0, 0.0, 0.0))
  39                 self.exposure = scene.view_settings.exposure
  40
  41                 self.use_hdr = scene.use_hdr
  42                 self.use_ao = scene.eevee.use_gtao
  43                 self.ao_distance = scene.eevee.gtao_distance
  44                 self.ao_samples = scene.ao_samples
  45                 if scene.world:
  46                         out_node = next((n for n in scene.world.node_tree.nodes if n.type=='OUTPUT_WORLD'), None)
  47                         if out_node:
  48                                 from .util import get_linked_node_and_socket
  49
  50                                 surface_node, _ = get_linked_node_and_socket(scene.world.node_tree, out_node.inputs["Surface"])
  51                                 if surface_node and surface_node.type=='BACKGROUND':
  52                                         c = surface_node.inputs["Color"].default_value
  53                                         s = surface_node.inputs["Strength"].default_value
  54                                         self.ambient_light = mathutils.Color(c[:3])*s
  55
  56                         self.use_sky = scene.world.use_sky and scene.world.sun_light
  57                         self.sun_light = scene.world.sun_light
  58
  59                 self.use_shadow = False
  60                 self.use_ibl = False
  61
  62                 objects = scene.objects[:]
  63                 objects.sort(key=lambda o:o.name)
  64                 if obj_filter:
  65                         objects = list(filter(obj_filter, objects))
  66
  67                 for o in objects:
  68                         if o.type=='MESH':
  69                                 self.add_instance(Instance(o, o))
  70                         elif o.type=='LIGHT':
  71                                 self.lights.append(o)
  72                                 if o.data.use_shadow:
  73                                         self.use_shadow = True
  74
  75                 for i in scene.view_layers[0].depsgraph.object_instances:
  76                         if i.is_instance and i.object.type=='MESH':
  77                                 self.add_instance(Instance(i, i.object))
  78
  79                 proto_map = {}
  80                 for i in itertools.chain(self.instances, self.blended_instances):
  81                         p = proto_map.get(i.prototype)
  82                         if p:
  83                                 i.prototype = p
  84                         else:
  85                                 found = False
  86                                 for p in proto_map.values():
  87                                         if is_same_object(i.prototype, p):
  88                                                 proto_map[i.prototype] = p
  89                                                 i.prototype = p
  90                                                 found = True
  91                                                 break
  92
  93                                 if not found:
  94                                         proto_map[i.prototype] = i.prototype
  95                                         self.prototypes.append(i.prototype)
  96
  97         def add_instance(self, instance):
  98                 obj = instance.prototype
  99                 instance_list = self.instances
 100                 if obj.material_slots and obj.material_slots[0].material:
 101                         mat = obj.material_slots[0].material
 102                         if mat.blend_method=='BLEND':
 103                                 instance_list = self.blended_instances
 104                         if mat.image_based_lighting:
 105                                 self.use_ibl = True
 106                 instance_list.append(instance)
 107
 108         def get_chain(self):
 109                 result = []
 110                 if self.background_set:
 111                         result = self.background_set.get_chain()
 112                 result.append(self)
 113                 return result
 114
 115 def get_all_collections(collection):
 116         result = [collection]
 117         for c in collection.children:
 118                 result += get_all_collections(c)
 119         return result
 120
 121 def create_scene_from_current(ctx, *, selected_only=False, visible_only=True):
 122         obj_filters = []
 123
 124         if selected_only:
 125                 obj_filters.append(lambda o: o.select_get())
 126
 127         if visible_only:
 128                 visible_names = set()
 129                 for c in get_all_collections(ctx.context.view_layer.layer_collection):
 130                         if not c.hide_viewport and not c.collection.hide_viewport:
 131                                 visible_names.update(o.name for o in c.collection.objects)
 132                 obj_filters.append(lambda o: o.name in visible_names)
 133
 134         obj_filter = None
 135         if len(obj_filters)==1:
 136                 obj_filter = obj_filters[0]
 137         if obj_filters:
 138                 obj_filter = lambda o: all(f(o) for f in obj_filters)
 139
 140         return Scene(ctx.context.scene, obj_filter)
 141
 142 def create_scene(scene, *, visible_only=True):
 143         obj_filter = None
 144
 145         if visible_only:
 146                 visible_names = set()
 147                 for c in get_all_collections(scene.collection):
 148                         if not c.hide_viewport:
 149                                 visible_names.update(o.name for o in c.objects)
 150                 obj_filter = lambda o: o.name in visible_names
 151
 152         return Scene(scene, obj_filter)
 153
 154 def create_scene_chain(scene, cache, *, visible_only=True):
 155         if cache is None:
 156                 cache = {}
 157
 158         top = None
 159         prev = None
 160         while scene:
 161                 converted = None
 162                 if scene.name in cache:
 163                         converted = cache[scene.name]
 164                 else:
 165                         converted = create_scene(scene, visible_only=visible_only)
 166                         cache[scene.name] = converted
 167
 168                 if not top:
 169                         top = converted
 170                 if prev:
 171                         prev.background_set = converted
 172
 173                 prev = converted
 174                 scene = scene.background_set
 175
 176         return top