Path-Based Terrain Texturing With Shared Quadtree Mesh Tiles
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Solution Overview
Problem
Existing ego vehicle-centric mipmapping-based tiling techniques face scalability issues in large-scale simulation environments with multiple ego agents, as they require customized local texture elevation meshes for each agent's viewpoint, leading to increased computational complexity.
Innovation Solution
Implement a terrain surface tiling processor that generates a common texture elevation mesh anchored to navigable pathways, using a quadtree structure with levels determined by distance from pathways, applying mipmaps with varying density based on distance to ensure high-fidelity rendering near pathways and lower-fidelity rendering at farther distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If customized local texture elevation meshes are generated for each agent's viewpoint, then high-fidelity rendering near each agent is achieved, but computational complexity increases
Solution Approach 1:
The patent merges multiple agent-specific viewpoint calculations into a single common texture elevation mesh that is shared across all ego agents. The quadtree structure is generated once based on the simulation environment geometry rather than separately for each agent, reducing computational complexity while maintaining rendering fidelity through the hierarchical mipmap approach.
Solution Approach 2:
The common texture elevation mesh serves multiple functions simultaneously: it provides the terrain representation for all ego agents, supports path-based navigation, and enables efficient rendering across different viewpoints. This universal structure eliminates the need for separate customized meshes for each agent.
2Manufacturing precision
If high-density texture images are applied throughout the entire terrain, then visual fidelity is maximized, but rendering performance deteriorates
Solution Approach 1:
The patent applies different texture densities to different regions of the terrain based on their importance and distance from the viewpoint. High-density textures are applied near pathways and important features, while lower-density textures are used for distant or less important areas. This is achieved through the quadtree structure that allows selective application of mipmap layers.
Solution Approach 2:
The texture density is dynamically adjusted based on distance from the viewpoint and importance of the terrain region. The mipmap structure enables automatic selection of appropriate texture resolutions, with higher density near the viewpoint and lower density in the distance, optimizing rendering performance while maintaining visual fidelity where needed.
Data Source
AI summary
In various examples, path-based terrain texture generation for simulation environment systems and applications are provided. In some embodiments, a terrain surface tiling processor produces a textured terrain that may be shared with any number of ego agents operating within a simulation environment. The terrain surface tiling processor may receive map data defining structured navigable pathways within the simulation environment and generate a quadtree structure that instantiates mesh tiles based on a function of distance from pathway structures corresponding to the navigable pathways. Based on the quadtree structure, a simulation platform may render texture nodes that display a highest density image at distances closest to a pathway structure, and increasingly lower density texture images as a function of increasing distance from the pathway structure. The texture of the 3D terrain may be rendered by applying a texture image from a layer of a mipmap to nodes of each quadtree mesh tile.