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
  17
  18 class Scene:
  19         def __init__(self, scene, obj_filter=None):
  20                 self.name = scene.name
  21                 self.export_disposition = scene.export_disposition
  22                 self.background_set = None
  23                 self.camera = scene.camera
  24                 self.prototypes = []
  25                 self.instances = []
  26                 self.blended_instances = []
  27                 self.lights = []
  28                 self.realtime_sky = False
  29                 self.sun_light = None
  30                 self.ambient_light = mathutils.Color((0.0, 0.0, 0.0))
  31                 self.exposure = scene.view_settings.exposure
  32
  33                 self.use_hdr = scene.use_hdr
  34                 self.use_ao = scene.eevee.use_gtao
  35                 self.ao_distance = scene.eevee.gtao_distance
  36                 self.ao_samples = scene.ao_samples
  37                 if scene.world:
  38                         out_node = next((n for n in scene.world.node_tree.nodes if n.type=='OUTPUT_WORLD'), None)
  39                         if out_node:
  40                                 from .util import get_linked_node_and_socket
  41
  42                                 surface_node, _ = get_linked_node_and_socket(scene.world.node_tree, out_node.inputs["Surface"])
  43                                 if surface_node and surface_node.type=='BACKGROUND':
  44                                         c = surface_node.inputs["Color"].default_value
  45                                         s = surface_node.inputs["Strength"].default_value
  46                                         self.ambient_light = mathutils.Color(c[:3])*s
  47
  48                         self.use_sky = scene.world.use_sky and scene.world.sun_light
  49                         self.sun_light = scene.world.sun_light
  50
  51                 self.use_shadow = False
  52                 self.use_ibl = False
  53
  54                 objects = scene.objects[:]
  55                 objects.sort(key=lambda o:o.name)
  56                 if obj_filter:
  57                         objects = list(filter(obj_filter, objects))
  58
  59                 processed = set()
  60                 for o in objects:
  61                         if o.name in processed:
  62                                 continue
  63
  64                         if o.type=='MESH':
  65                                 clones = [c for c in objects if is_same_object(o, c)]
  66                                 self.prototypes.append(o)
  67                                 instance_list = self.instances
  68                                 if o.material_slots and o.material_slots[0].material:
  69                                         mat = o.material_slots[0].material
  70                                         if mat.blend_method=='BLEND':
  71                                                 instance_list = self.blended_instances
  72                                         if mat.image_based_lighting:
  73                                                 self.use_ibl = True
  74                                 for c in clones:
  75                                         instance_list.append(Instance(c, o))
  76                                         processed.add(c.name)
  77                         elif o.type=='LIGHT':
  78                                 self.lights.append(o)
  79                                 if o.data.use_shadow:
  80                                         self.use_shadow = True
  81
  82         def get_chain(self):
  83                 result = []
  84                 if self.background_set:
  85                         result = self.background_set.get_chain()
  86                 result.append(self)
  87                 return result
  88
  89 def get_all_collections(collection):
  90         result = [collection]
  91         for c in collection.children:
  92                 result += get_all_collections(c)
  93         return result
  94
  95 def create_scene_from_current(ctx, *, selected_only=False, visible_only=True):
  96         obj_filters = []
  97
  98         if selected_only:
  99                 obj_filters.append(lambda o: o.select_get())
 100
 101         if visible_only:
 102                 visible_names = set()
 103                 for c in get_all_collections(ctx.context.view_layer.layer_collection):
 104                         if not c.hide_viewport and not c.collection.hide_viewport:
 105                                 visible_names.update(o.name for o in c.collection.objects)
 106                 obj_filters.append(lambda o: o.name in visible_names)
 107
 108         obj_filter = None
 109         if len(obj_filters)==1:
 110                 obj_filter = obj_filters[0]
 111         if obj_filters:
 112                 obj_filter = lambda o: all(f(o) for f in obj_filters)
 113
 114         return Scene(ctx.context.scene, obj_filter)
 115
 116 def create_scene(scene, *, visible_only=True):
 117         obj_filter = None
 118
 119         if visible_only:
 120                 visible_names = set()
 121                 for c in get_all_collections(scene.collection):
 122                         if not c.hide_viewport:
 123                                 visible_names.update(o.name for o in c.objects)
 124                 obj_filter = lambda o: o.name in visible_names
 125
 126         return Scene(scene, obj_filter)
 127
 128 def create_scene_chain(scene, cache, *, visible_only=True):
 129         if cache is None:
 130                 cache = {}
 131
 132         top = None
 133         prev = None
 134         while scene:
 135                 converted = None
 136                 if scene.name in cache:
 137                         converted = cache[scene.name]
 138                 else:
 139                         converted = create_scene(scene, visible_only=visible_only)
 140                         cache[scene.name] = converted
 141
 142                 if not top:
 143                         top = converted
 144                 if prev:
 145                         prev.background_set = converted
 146
 147                 prev = converted
 148                 scene = scene.background_set
 149
 150         return top