Large-scale scene virtual sky modeling method under condition of multi-viewpoint multi-view-angle view field displaying

Abstract

The invention provides a large-scale scene virtual sky modeling method under the condition of multi-viewpoint multi-view-angle view field displaying. Firstly, three-dimensional realistic modeling of a combined type sky pillar and other individual objects is carried out, then integration of virtual large-scale scenes based on the combined type sky pillar is finished, motion rules of the combined type sky pillar and other motion models are set, and finally viewpoints based on the combined type sky pillar are set. The large-scale scene virtual sky modeling method under the condition of multi-viewpoint multi-view-angle view field displaying effectively achieves multi-viewpoint and multi-view-angle observation and real-time three-dimensional realistic displaying of observation view fields, achieves a continuous and smooth sky background switch-over effect both in the horizontal direction and in the vertical direction, can meet virtual sky modeling requirements of multi-viewpoint and multi-view-angle observation and three-dimensional realistic displaying of view fields in large-scale scene visual simulation.

Description

technical field [0001] The invention relates to a sky modeling method in visual scene simulation, in particular to a virtual sky modeling method under the conditions of large scenes and complex viewpoints. Background technique [0002] In the application of visual simulation, sky simulation is an essential element. The realism of the sky background can greatly improve visual enjoyment and immersion for users. The traditional sky modeling methods include background map method, sky box method and sky ball method. The background map method uses the sky picture as the texture image as the sky background and places it in front of the viewpoint. This method is suitable when the camera viewpoint is single, the viewing angle is fixed or the angle of change is small (that is, it does not exceed the range that texture image modeling can cover). It is a feasible and efficient method. After certain technical processing, a sky background with certain dynamic effects can also be realize...

AI Technical Summary

Problems solved by technology

However, its strict requirements on the angle of view greatly limit the scope of application; the sky box method uses a cube to simulate the virtual space, covering the virtual scene, and the front, back, left, right and top surfaces of the cube are on the inside of the five faces. Paste the sky texture image

Although this method can achieve multi-view viewing from viewpoints, seams will inevitably appear at the prisms where the cube faces meet, which will affect the realistic display.

In addition, when the scene is very large, the required cube size is also large. At this time, the sky texture image will be stretched to a huge plane, and the mosaic phenomenon of the image is serious, and it is often difficult to achieve a realistic effect; the sky ball method uses a The hemisphere simulates the virtual space, covers the virtual scene, and pastes the sky texture image on the inside of the hemisphere. This method eliminates the seam defects of the sky box method, but when displaying large scenes, in addition to the same problems as the sky box method, Also, due to the large amount of data in the large spherical area, the real-time performance of the scene will be deteriorated

In addition, the above three methods do not involve the scene change of the vertical distribution of the atmosphere

[0003] In the visual simulation, when multiple viewpoints are required to observe the dynamic virtual scene in a large range at the same time with completely different perspectives, the sky must cover the background of the field of view observed from all viewpoints in different directions at any time. At this time, the difficulty of modeling the sky will be greatly increased, and the existing sky modeling methods cannot meet such requirements

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