Virtual Terrain Rendering with Camera-Based LOD Loading
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Solution Overview
Problem
Existing terrain rendering technologies require pre-selection of a flight region for loading terrain data, limiting applicability and flexibility in virtual terrain simulations.
Innovation Solution
A virtual terrain rendering method that persistently loads virtual terrain data at a first level of detail and dynamically loads data at a target level of detail based on the orientation of a virtual camera, using a quadtree structure to optimize detail levels for visible blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If pre-loading strategy is used to load terrain data, then terrain data can be loaded in advance for the selected flight region, but the user can only perform training in a pre-selected region resulting in poor applicability
Solution Approach 1:
The patent implements dynamic terrain data loading by continuously monitoring the virtual camera's orientation and dynamically determining visible virtual blocks. The system adjusts the level of detail and loads terrain data in real-time based on the current view, rather than using static pre-loading for fixed regions. This dynamic approach allows users to freely navigate any region while maintaining optimal loading performance.
Solution Approach 2:
The system changes the parameter of terrain data detail level based on the virtual camera's orientation and visible blocks. By adjusting the level of detail parameter dynamically according to viewing conditions, the system optimizes loading efficiency for any region while maintaining visual quality where needed.
2Manufacturing precision
If terrain data at high level of detail is loaded for all virtual blocks, then rendering precision is improved, but computational overhead and memory usage increase significantly
Solution Approach 1:
The patent applies local quality by determining the level of detail for each visible virtual block individually based on its visibility and importance. Only blocks that are currently visible and significant to the view are loaded at high detail levels, while other blocks use lower detail levels. This localized approach maintains rendering precision where needed while reducing overall computational overhead.
Solution Approach 2:
The system performs partial loading by selectively loading terrain data only for visible virtual blocks rather than all blocks. This partial action approach loads exactly the necessary data for the current view, avoiding the excessive computational overhead of loading complete high-detail data for the entire terrain.
3Adaptability or versatility
If terrain data is loaded dynamically based on virtual camera orientation, then flexibility and realism are enhanced, but system complexity increases
Solution Approach 1:
The system implements self-service by automatically determining visible virtual blocks and selecting appropriate level of detail based on virtual camera orientation without manual intervention. The terrain loading process serves itself by using the camera's state to automatically adjust data loading, reducing the need for complex external control systems while maintaining high flexibility.
Data Source
AI summary
A virtual terrain rendering method is performed by a computer device. The method includes: in response to a virtual terrain rendering instruction, determining virtual terrain data of a plurality of virtual blocks in a virtual terrain, the virtual terrain data having first and second levels of detail, and a degree of detail represented by the first level of detail being lower than a degree of detail represented by the second level of detail; determining, among the plurality of virtual blocks, at least one visible virtual block and respective target levels of detail of the at least one visible virtual block based on an orientation of a virtual camera; and rendering the virtual terrain based on the virtual terrain data of the at least one visible virtual block at the respective target levels of detail.