Visualization method for mobile terminal inclination model data

Abstract

The invention relates to a visualization method for mobile terminal inclination model data. The method comprises the steps of 1, obtaining coordinates of a current camera in a three-dimensional space;2, acquiring coordinates of four vertexes of a current screen of the mobile terminal, and generating rays in an inward three-dimensional space respectively vertical to the screen; 3, calculating focuses where the four rays are respectively intersected with all the triangular grids; 4, judging whether any coordinate point in each data block is located in a quadrangle formed by four focuses or not,if so, determining that the data block is a data block visible in the current screen of the mobile terminal, and turning to 5; If not, the data block is an invisible data block; 5, calculating a linear distance between each data block and the camera; 6, finding out the hierarchical relationship of the corresponding granularity of each data block, and reading and loading the corresponding inclineddata in the selected hierarchy of each data block according to the hierarchical index of the granularity in the data block; And 7, traversing and rendering the inclined three-dimensional data visiblein the current screen. And the data loading speed is high, and the loading data size is reduced.

Description

technical field [0001] The invention relates to a visualization method, in particular to a visualization method for mobile terminal tilt model data. Background technique [0002] Oblique photography technology is a high-tech developed in the field of international photogrammetry in the past ten years. This technology acquires rich top and side views of buildings by synchronously collecting images from five different viewing angles, including one vertical and four oblique angles. high resolution texture. It can not only truly reflect the situation of ground objects, obtain the texture information of ground objects with high precision, but also generate a real 3D city model through advanced positioning, fusion, modeling and other technologies, and introduce users into the reality that conforms to human vision. Intuitive world. [0003] Oblique photogrammetry technology comprehensively perceives complex scenes in a large-scale, high-precision, and high-definition manner, and ...

AI Technical Summary

Problems solved by technology

Lightweight applications only support the visualization of a small-scale single scene, and insufficient support for a large-scale oblique 3D scene. When loading an oblique camera model on the mobile terminal, it is necessary to perform texture compression on the oblique camera model to meet different types of mobile devices. In addition, due to the limitation of the performance of the mobile device itself, the display of large-scale tilted data will occupy a lot of hardware resources, and it will be very difficult to directly load and display the entire large-scale single scene

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