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 = scene.use_hdr
  32                 if scene.world:
  33                         out_node = next((n for n in scene.world.node_tree.nodes if n.type=='OUTPUT_WORLD'), None)
  34                         if out_node:
  35                                 from .util import get_linked_node_and_socket
  36
  37                                 surface_node, _ = get_linked_node_and_socket(scene.world.node_tree, out_node.inputs["Surface"])
  38                                 if surface_node and surface_node.type=='BACKGROUND':
  39                                         c = surface_node.inputs["Color"].default_value
  40                                         s = surface_node.inputs["Strength"].default_value
  41                                         self.ambient_light = mathutils.Color(c[:3])*s
  42
  43                 objects = scene.objects[:]
  44                 objects.sort(key=lambda o:o.name)
  45                 if obj_filter:
  46                         objects = list(filter(obj_filter, objects))
  47
  48                 processed = set()
  49                 for o in objects:
  50                         if o.name in processed:
  51                                 continue
  52
  53                         if o.type=='MESH':
  54                                 clones = [c for c in objects if is_same_object(o, c)]
  55                                 self.prototypes.append(o)
  56                                 for c in clones:
  57                                         self.instances.append(Instance(c, o))
  58                                         processed.add(c.name)
  59                         elif o.type=='LIGHT':
  60                                 self.lights.append(o)
  61
  62         def get_chain(self):
  63                 result = []
  64                 if self.background_set:
  65                         result = self.background_set.get_chain()
  66                 result.append(self)
  67                 return result
  68
  69 def get_all_collections(collection):
  70         result = [collection]
  71         for c in collection.children:
  72                 result += get_all_collections(c)
  73         return result
  74
  75 def create_scene_from_current(context, *, selected_only=False, visible_only=True):
  76         obj_filters = []
  77
  78         if selected_only:
  79                 obj_filters.append(lambda o: o.select_get())
  80
  81         if visible_only:
  82                 visible_names = set()
  83                 for c in get_all_collections(context.view_layer.layer_collection):
  84                         if not c.hide_viewport and not c.collection.hide_viewport:
  85                                 visible_names.update(o.name for o in c.collection.objects)
  86                 obj_filters.append(lambda o: o.name in visible_names)
  87
  88         obj_filter = None
  89         if len(obj_filters)==1:
  90                 obj_filter = obj_filters[0]
  91         if obj_filters:
  92                 obj_filter = lambda o: all(f(o) for f in obj_filters)
  93
  94         return Scene(context.scene, obj_filter)
  95
  96 def create_scene(scene, *, visible_only=True):
  97         obj_filter = None
  98
  99         if visible_only:
 100                 visible_names = set()
 101                 for c in get_all_collections(scene.collection):
 102                         if not c.hide_viewport:
 103                                 visible_names.update(o.name for o in c.objects)
 104                 obj_filter = lambda o: o.name in visible_names
 105
 106         return Scene(scene, obj_filter)
 107
 108 def create_scene_chain(scene, cache, *, visible_only=True):
 109         if cache is None:
 110                 cache = {}
 111
 112         top = None
 113         prev = None
 114         while scene:
 115                 converted = None
 116                 if scene.name in cache:
 117                         converted = cache[scene.name]
 118                 else:
 119                         converted = create_scene(scene, visible_only=visible_only)
 120                         cache[scene.name] = converted
 121
 122                 if not top:
 123                         top = converted
 124                 if prev:
 125                         prev.background_set = converted
 126
 127                 prev = converted
 128                 scene = scene.background_set
 129
 130         return top