Cloud Texture Mapping for 3D Sky Dome Rendering
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Solution Overview
Problem
Modern in-vehicle information systems face challenges in generating realistic graphical depictions of clouds in 3D mapping applications due to hardware limitations and high power consumption, which limits their computational efficiency and battery life in vehicles and mobile devices.
Innovation Solution
A method and system that utilize a processor to receive weather data, apply threshold filters to cloud textures, and map them to a geometric sky dome surface, using an isotropic single-scatter color model to generate a graphical depiction of clouds, which can be animated based on wind speed and direction, reducing computational resources and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If complex graphical rendering methods are used to produce realistic cloud effects in 3D maps, then the visual realism and quality of cloud depiction is improved, but the hardware resource consumption and computational load increase significantly
Solution Approach 1:
The patent uses 2D cloud textures as simplified copies that represent complex cloud formations. Instead of rendering actual volumetric cloud data, the system applies pre-generated 2D texture images to a sky dome surface, dramatically reducing computational requirements while maintaining visual realism. The texture images capture essential cloud characteristics without requiring full 3D cloud simulation.
Solution Approach 2:
The patent employs lightweight 2D texture images that can be rapidly generated, stored, and applied. These textures serve as disposable graphical elements that replace computationally expensive real-time cloud simulations. The textures can be pre-processed offline and quickly applied during runtime, eliminating the need for continuous complex calculations.
2Manufacturing precision
If high-power graphics processing is used to render realistic clouds, then the rendering quality and visual fidelity are improved, but the battery power consumption increases, draining the device battery
Solution Approach 1:
The system uses 2D texture copies to represent clouds instead of performing full 3D volumetric rendering. This approach maintains visual fidelity by using pre-computed textures that capture realistic cloud appearance, while consuming minimal power during application. The textures are applied to a simple sky dome geometry rather than simulating actual cloud physics.
Solution Approach 2:
Cloud textures are pre-generated and pre-processed before runtime. The computationally intensive tasks of creating realistic cloud patterns are performed in advance and stored as texture images. During actual use, the system only needs to apply these pre-computed textures to the sky dome, which requires minimal processing power and battery consumption.
3Reliability
If detailed 3D cloud rendering is implemented, then the graphical realism and weather effect quality are improved, but the computational efficiency and rendering speed decrease
Solution Approach 1:
The patent applies 2D texture images to a sky dome surface to represent clouds. This copying approach maintains graphical realism by using high-quality pre-rendered textures, while achieving fast rendering speeds through simple texture mapping operations. The method avoids computationally intensive volumetric rendering while preserving visual fidelity.
Solution Approach 2:
The system applies cloud textures to only the sky dome portion of the 3D environment where clouds are visible. Rather than rendering detailed clouds throughout the entire scene or performing full atmospheric simulation, the solution applies textures selectively to the relevant sky region, achieving efficient rendering without sacrificing visible cloud realism.
Data Source
AI summary
A method for displaying graphics of clouds in a three-dimensional (3D) virtual environment includes generating a filtered texture based on a threshold filter applied to a cloud texture where the filter threshold corresponds to cloud coverage information in weather data of a geographic region. The method further includes mapping the filtered texture to a geometric surface corresponding to a sky dome in the 3D virtual environment, coloring a plurality of texels in the mapped filtered texture on the geometric surface stored in the memory based on an isotropic single-scatter color model, and generating a graphical depiction of the 3D virtual environment including at least a portion of the geometric surface corresponding to the sky dome with clouds based on the plurality of texels of the filtered texture that are colored and mapped to the geometric surface.