blender/io_mspgl/scene.py

   1 import mathutils
   2
   3 def is_same_object(obj1, obj2):
   4         if obj1.data.name!=obj2.data.name:
   5                 return False
   6         if any(m1.name!=m2.name for m1, m2 in zip(obj1.material_slots, obj2.material_slots)):
   7                 return False
   8
   9         return True
  10
  11 class Instance:
  12         def __init__(self, obj, prototype):
  13                 self.name = obj.name
  14                 self.matrix_world = obj.matrix_world
  15                 self.rotation_mode = obj.rotation_mode
  16                 self.prototype = prototype.name
  17
  18 class Scene:
  19         def __init__(self, scene, obj_filter=None):
  20                 self.name = scene.name
  21                 self.scene_type = scene.scene_type
  22                 self.export_disposition = scene.export_disposition
  23                 self.background_set = None
  24                 self.camera = scene.camera
  25                 self.prototypes = []
  26                 self.instances = []
  27                 self.lights = []
  28                 self.ambient_light = mathutils.Color((0.0, 0.0, 0.0))
  29                 self.exposure = scene.view_settings.exposure
  30
  31                 self.use_hdr = False
  32                 if scene.world:
  33                         self.use_hdr = scene.world.use_hdr
  34
  35                         out_node = next((n for n in scene.world.node_tree.nodes if n.type=='OUTPUT_WORLD'), None)
  36                         if out_node:
  37                                 from .util import get_linked_node_and_socket
  38
  39                                 surface_node, _ = get_linked_node_and_socket(scene.world.node_tree, out_node.inputs["Surface"])
  40                                 if surface_node and surface_node.type=='BACKGROUND':
  41                                         c = surface_node.inputs["Color"].default_value
  42                                         s = surface_node.inputs["Strength"].default_value
  43                                         self.ambient_light = mathutils.Color(c[:3])*s
  44
  45                 objects = scene.objects[:]
  46                 objects.sort(key=lambda o:o.name)
  47                 if obj_filter:
  48                         objects = list(filter(obj_filter, objects))
  49
  50                 processed = set()
  51                 for o in objects:
  52                         if o.name in processed:
  53                                 continue
  54
  55                         if o.type=='MESH':
  56                                 clones = [c for c in objects if is_same_object(o, c)]
  57                                 self.prototypes.append(o)
  58                                 for c in clones:
  59                                         self.instances.append(Instance(c, o))
  60                                         processed.add(c.name)
  61                         elif o.type=='LIGHT':
  62                                 self.lights.append(o)
  63
  64         def get_chain(self):
  65                 result = []
  66                 if self.background_set:
  67                         result = self.background_set.get_chain()
  68                 result.append(self)
  69                 return result
  70
  71 def get_all_collections(collection):
  72         result = [collection]
  73         for c in collection.children:
  74                 result += get_all_collections(c)
  75         return result
  76
  77 def create_scene_from_current(context, *, selected_only=False, visible_only=True):
  78         obj_filters = []
  79
  80         if selected_only:
  81                 obj_filters.append(lambda o: o.select_get())
  82
  83         if visible_only:
  84                 visible_names = set()
  85                 for c in get_all_collections(context.view_layer.layer_collection):
  86                         if not c.hide_viewport and not c.collection.hide_viewport:
  87                                 visible_names.update(o.name for o in c.collection.objects)
  88                 obj_filters.append(lambda o: o.name in visible_names)
  89
  90         obj_filter = None
  91         if len(obj_filters)==1:
  92                 obj_filter = obj_filters[0]
  93         if obj_filters:
  94                 obj_filter = lambda o: all(f(o) for f in obj_filters)
  95
  96         return Scene(context.scene, obj_filter)
  97
  98 def create_scene(scene, *, visible_only=True):
  99         obj_filter = None
 100
 101         if visible_only:
 102                 visible_names = set()
 103                 for c in get_all_collections(scene.collection):
 104                         if not c.hide_viewport:
 105                                 visible_names.update(o.name for o in c.objects)
 106                 obj_filter = lambda o: o.name in visible_names
 107
 108         return Scene(scene, obj_filter)
 109
 110 def create_scene_chain(scene, cache, *, visible_only=True):
 111         if cache is None:
 112                 cache = {}
 113
 114         top = None
 115         prev = None
 116         while scene:
 117                 converted = None
 118                 if scene.name in cache:
 119                         converted = cache[scene.name]
 120                 else:
 121                         converted = create_scene(scene, visible_only=visible_only)
 122                         cache[scene.name] = converted
 123
 124                 if not top:
 125                         top = converted
 126                 if prev:
 127                         prev.background_set = converted
 128
 129                 prev = converted
 130                 scene = scene.background_set
 131
 132         return top