Level of detail blurring and 3D model data selection

摘要

A set of nodes for rendering a 3D model using a set of camera parameters based on at least a threshold error value may be selected. Each node corresponds to a bundle of data for rendering a geographic area at a particular resolution and the camera parameters including a point of view for rendering the 3D model. For a given node of the set of nodes, a smallest circle of confusion within a bounding box of the geographic area of the given node may be determined using the set of camera parameters closest to a particular parameter of the set of camera parameters. A diameter of the smallest circle of confusion is compared to the threshold error value. Based on this comparison, the threshold error value is adjusted. The adjusted threshold error value is used to select a new node to replace the given node in the set of nodes.

主权项

1. A method comprising:
receiving, by one or more computing devices, user input indicating a location on a first three-dimensional (3D) model; selecting, by the one or more computing devices, from a plurality of nodes, a set of nodes for rendering a second 3D model from a given location of an imaginary camera based on a threshold error value and the location, each node corresponding to a bundle of data for rendering aspects of 3D models at a particular resolution; for a given node of the set of nodes, determining, by the one or more computing devices, whether a smallest circle of confusion within a bounding box of a geographic area of the given node is greater than the threshold error value; when the smallest circle of confusion is greater than the threshold error value for the given node, increasing, by the one or more computing devices, the threshold error value; and selecting, by the one or more computing devices, a new node of the plurality of nodes to replace the given node in the set of nodes based on at least in part the increased threshold error value, wherein the new node has a different particular resolution from the given node; and providing, by the one or more computing devices, the set of nodes in order to display the second 3D model such that the location appears to come into focus from a display of the first 3D model and the geographic area of the new node appears out of focus.