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 ObjectPrototype:
  14         def __init__(self, obj):
  15                 self.name = obj.name
  16                 self.object = obj
  17                 self.instances = []
  18                 self.use_array = False
  19
  20 class ObjectInstance:
  21         def __init__(self, obj, prototype):
  22                 if type(obj)==bpy.types.DepsgraphObjectInstance:
  23                         self.name = None
  24                         self.matrix_world = mathutils.Matrix(obj.matrix_world)
  25                         self.rotation_mode = prototype.object.rotation_mode
  26                 else:
  27                         self.name = obj.name
  28                         self.matrix_world = obj.matrix_world
  29                         self.rotation_mode = obj.rotation_mode
  30                 self.prototype = prototype
  31
  32 class Scene:
  33         def __init__(self, scene, obj_filter=None):
  34                 self.name = scene.name
  35                 self.export_disposition = scene.export_disposition
  36                 self.background_set = None
  37                 self.camera = scene.camera
  38                 self.prototypes = []
  39                 self.instances = []
  40                 self.blended_instances = []
  41                 self.lights = []
  42                 self.realtime_sky = False
  43                 self.sun_light = None
  44                 self.ambient_light = mathutils.Color((0.0, 0.0, 0.0))
  45                 self.exposure = scene.view_settings.exposure
  46
  47                 self.use_hdr = scene.use_hdr
  48                 self.use_ao = scene.eevee.use_gtao
  49                 self.ao_distance = scene.eevee.gtao_distance
  50                 self.ao_samples = scene.ao_samples
  51                 if scene.world:
  52                         out_node = next((n for n in scene.world.node_tree.nodes if n.type=='OUTPUT_WORLD'), None)
  53                         if out_node:
  54                                 from .util import get_linked_node_and_socket
  55
  56                                 surface_node, _ = get_linked_node_and_socket(scene.world.node_tree, out_node.inputs["Surface"])
  57                                 if surface_node and surface_node.type=='BACKGROUND':
  58                                         c = surface_node.inputs["Color"].default_value
  59                                         s = surface_node.inputs["Strength"].default_value
  60                                         self.ambient_light = mathutils.Color(c[:3])*s
  61
  62                         self.use_sky = scene.world.use_sky and scene.world.sun_light
  63                         self.sun_light = scene.world.sun_light
  64
  65                 self.use_shadow = False
  66                 self.use_ibl = False
  67
  68                 objects = scene.objects[:]
  69                 objects.sort(key=lambda o:o.name)
  70                 if obj_filter:
  71                         objects = list(filter(obj_filter, objects))
  72
  73                 proto_map = {}
  74                 for o in objects:
  75                         if o.type=='MESH':
  76                                 self.add_instance(o, o, proto_map)
  77                         elif o.type=='LIGHT':
  78                                 self.lights.append(o)
  79                                 if o.data.use_shadow:
  80                                         self.use_shadow = True
  81
  82                 for i in scene.view_layers[0].depsgraph.object_instances:
  83                         if i.is_instance and i.object.type=='MESH':
  84                                 self.add_instance(i, bpy.data.objects[i.object.name], proto_map)
  85
  86         def add_instance(self, obj, proto_obj, proto_map):
  87                 prototype = proto_map.get(proto_obj)
  88                 if not prototype:
  89                         for p in proto_map.values():
  90                                 if is_same_object(proto_obj, p.object):
  91                                         prototype = p
  92                                         break
  93
  94                         if not prototype:
  95                                 prototype = ObjectPrototype(proto_obj)
  96                                 self.prototypes.append(prototype)
  97
  98                         proto_map[proto_obj] = prototype
  99
 100                 instance_list = self.instances
 101                 if proto_obj.material_slots and proto_obj.material_slots[0].material:
 102                         mat = proto_obj.material_slots[0].material
 103                         if mat.blend_method=='BLEND':
 104                                 instance_list = self.blended_instances
 105                         if mat.image_based_lighting:
 106                                 self.use_ibl = True
 107                         if mat.instancing:
 108                                 prototype.use_array = True
 109
 110                 instance = ObjectInstance(obj, prototype)
 111                 instance_list.append(instance)
 112                 prototype.instances.append(instance)
 113
 114         def get_chain(self):
 115                 result = []
 116                 if self.background_set:
 117                         result = self.background_set.get_chain()
 118                 result.append(self)
 119                 return result
 120
 121 def get_all_collections(collection):
 122         result = [collection]
 123         for c in collection.children:
 124                 result += get_all_collections(c)
 125         return result
 126
 127 def create_scene_from_current(ctx, *, selected_only=False, visible_only=True):
 128         obj_filters = []
 129
 130         if selected_only:
 131                 obj_filters.append(lambda o: o.select_get())
 132
 133         if visible_only:
 134                 visible_names = set()
 135                 for c in get_all_collections(ctx.context.view_layer.layer_collection):
 136                         if not c.hide_viewport and not c.collection.hide_viewport:
 137                                 visible_names.update(o.name for o in c.collection.objects)
 138                 obj_filters.append(lambda o: o.name in visible_names)
 139
 140         obj_filter = None
 141         if len(obj_filters)==1:
 142                 obj_filter = obj_filters[0]
 143         if obj_filters:
 144                 obj_filter = lambda o: all(f(o) for f in obj_filters)
 145
 146         return Scene(ctx.context.scene, obj_filter)
 147
 148 def create_scene(scene, *, visible_only=True):
 149         obj_filter = None
 150
 151         if visible_only:
 152                 visible_names = set()
 153                 for c in get_all_collections(scene.collection):
 154                         if not c.hide_viewport:
 155                                 visible_names.update(o.name for o in c.objects)
 156                 obj_filter = lambda o: o.name in visible_names
 157
 158         return Scene(scene, obj_filter)
 159
 160 def create_scene_chain(scene, cache, *, visible_only=True):
 161         if cache is None:
 162                 cache = {}
 163
 164         top = None
 165         prev = None
 166         while scene:
 167                 converted = None
 168                 if scene.name in cache:
 169                         converted = cache[scene.name]
 170                 else:
 171                         converted = create_scene(scene, visible_only=visible_only)
 172                         cache[scene.name] = converted
 173
 174                 if not top:
 175                         top = converted
 176                 if prev:
 177                         prev.background_set = converted
 178
 179                 prev = converted
 180                 scene = scene.background_set
 181
 182         return top