Mobile terminal-based three-dimensional virtual earth interaction method

Abstract

The invention provides a mobile terminal-based three-dimensional virtual earth interaction method. The roaming operation of a scene is performed by using multiple view angles and multiple conversion means; the purpose of multi-scale and multi-view angle display of three-dimensional virtual earth at present can be achieved; and the demand of gradual increment of scale of browsing the three-dimensional scene by users at present can be met. A three-dimensional interactive technology allowing the users to adjust spatial orientation through two-dimensional operation is designed; in the three-dimensional virtual earth, the users need to operate a virtual earth model built by data of large-range terrains, images and the like; and the center of a virtual ball can well coincide with the center of the earth model, so that good interactive experience is brought for the users. The sliding, rotation and zooming functions of browsing the mobile terminal-based three-dimensional virtual earth by the users are designed; and in a gesture control way, the whole interactive mode is more novel and vivid, so that the interactive experience of the users is enhanced.

Description

technical field [0001] The invention relates to a method for interacting with a three-dimensional virtual globe, in particular to a method for interacting with a three-dimensional virtual globe based on a mobile terminal, and belongs to the technical field of a three-dimensional virtual globe based on a mobile platform. Background technique [0002] Along with the rapid development of smart mobile devices, people use handheld mobile terminals such as mobile phones and ipads to conduct web browsing, instant chat, monitoring and positioning, navigation and other information services. According to statistics, 70% of the information in people's daily activities %-80% are related to geographic information. As a shared platform for geographic information services, the mobile 3D virtual globe can more realistically and intuitively present the spatial relationship and orientation between geographic entities to the public, and provide basic geographic information for navigation and i...

AI Technical Summary

Problems solved by technology

[0006] On the whole, the existing technology mainly has the following defects: First, as the scale of the 3D scene that users need to browse gradually increases, the roaming operation of the scene using only a single perspective or limited transformation means is not enough to satisfy the current 3D virtual environment. The purpose of multi-scale and multi-angle display of the earth is not in line with the operating habits of users to browse geographic data in an all-round way; the second is that the limitations of the input devices of the existing technology make it impossible for the system to express the translation in the Cartesian coordinate system through two-dimensional operations And the Euler rotation operation lacks a three-dimensional interactive technology that allows users to adjust the spatial orientation through two-dimensional operations. In the three-dimensional virtual earth, what the user needs to operate is a virtual earth model constructed from data such as large-scale terrain and images. The virtual ball center It cannot coincide with the center of the earth model, and the interactive experience brought to users is poor; thirdly, due to the touch screen design of the mobile terminal, the interaction mode of the mobile platform is different from the traditional PC input method combined with the left and right mouse buttons and the scroll wheel, and lacks a mobile-based input method. The sliding, rotating, and zooming functions of the three-dimensional virtual globe on the terminal cannot be manipulated by gestures to make the entire interaction method more novel and vivid, and enhance the user's interactive experience

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