Class Scene

scene/__init__.py:23–106

from utils.graphics_utils import compute_scale_gaussian_by_project_pair_pcd, fov2focal

class Scene:

    gaussians : GaussianModel

    def __init__(self, args : ModelParams, gaussians : GaussianModel, load_iteration=None, opt=None, shuffle=True, resolution_scales=[1.0]):
        """b
        :param path: Path to colmap scene main folder.
        """
        self.model_path = args.model_path
        self.loaded_iter = None
        self.gaussians = gaussians

        if load_iteration:
            if load_iteration == -1:
                self.loaded_iter = searchForMaxIteration(os.path.join(self.model_path, "point_cloud"))
            else:
                self.loaded_iter = load_iteration
            print("Loading trained model at iteration {}".format(self.loaded_iter))

        self.train_cameras = {}
        self.test_cameras = {}

        if os.path.exists(os.path.join(args.source_path, f"sparse_{args.n_views}")):
            scene_info = sceneLoadTypeCallbacks["Colmap"](args.source_path, args.images, args.eval, args)
        elif os.path.exists(os.path.join(args.source_path, "transforms_train.json")):
            print("Found transforms_train.json file, assuming Blender data set!")
            scene_info = sceneLoadTypeCallbacks["Blender"](args.source_path, args.white_background, args.eval)
        else:
            assert False, "Could not recognize scene type!"

        if not self.loaded_iter:
            with open(scene_info.ply_path, 'rb') as src_file, open(os.path.join(self.model_path, "input.ply") , 'wb') as dest_file:
                dest_file.write(src_file.read())
            json_cams = []
            camlist = []
            if scene_info.test_cameras:
                camlist.extend(scene_info.test_cameras)
            if scene_info.train_cameras:
                camlist.extend(scene_info.train_cameras)
            for id, cam in enumerate(camlist):
                json_cams.append(camera_to_JSON(id, cam))
            with open(os.path.join(self.model_path, "cameras.json"), 'w') as file:
                json.dump(json_cams, file)

        if shuffle:
            random.shuffle(scene_info.train_cameras)  # Multi-res consistent random shuffling
            random.shuffle(scene_info.test_cameras)  # Multi-res consistent random shuffling

        self.cameras_extent = scene_info.nerf_normalization["radius"]

        for resolution_scale in resolution_scales:
            print("Loading Training Cameras")
            self.train_cameras[resolution_scale] = cameraList_from_camInfos(scene_info.train_cameras, resolution_scale, args)
            print('train_camera_num: ', len(self.train_cameras[resolution_scale]))
            print("Loading Test Cameras")
            self.test_cameras[resolution_scale] = cameraList_from_camInfos(scene_info.test_cameras, resolution_scale, args)
            print('test_camera_num: ', len(self.test_cameras[resolution_scale]))