论文标题
使用虚幻引擎可视化宇宙学量
Using Unreal Engine to Visualize a Cosmological Volume
论文作者
论文摘要
在这项工作中，我们提出了“ Astera”，这是一种宇宙学可视化工具，它使用虚幻引擎4实时呈现模拟宇宙。基础数据基于使用N体暗物质模拟的结果分配的经验关系，并与具有相似形态和大小的星系匹配，其图像是从Sloan Digital Sky调查中提取的。在虚幻引擎4中，银河图像被转换为纹理和动态材料（具有适当的透明度），这些材料适用于具有适当尺寸和位置的静态网格对象。为了确保出色的性能，这些静态网眼是“实例化”，以利用图形处理单元的完整功能。其他组件包括用于代表加速时间活跃银河核的动态系统。最终结果是一个视觉上现实的大规模宇宙，用户可以实时探索，并具有准确的大规模结构。 Astera尚未准备好公开发布，但我们正在探索选择不同版本的代码，可用于研究和推广应用程序。
In this work we present `Astera', a cosmological visualization tool that renders a mock universe in real time using Unreal Engine 4. The large scale structure of the cosmic web is hard to visualize in two dimensions, and a 3D real time projection of this distribution allows for an unprecedented view of the large scale universe, with visually accurate galaxies placed in a dynamic 3D world. The underlying data are based on empirical relations assigned using results from N-Body dark matter simulations, and are matched to galaxies with similar morphologies and sizes, images of which are extracted from the Sloan Digital Sky Survey. Within Unreal Engine 4, galaxy images are transformed into textures and dynamic materials (with appropriate transparency) that are applied to static mesh objects with appropriate sizes and locations. To ensure excellent performance, these static meshes are `instanced' to utilize the full capabilities of a graphics processing unit. Additional components include a dynamic system for representing accelerated-time active galactic nuclei. The end result is a visually realistic large scale universe that can be explored by a user in real time, with accurate large scale structure. Astera is not yet ready for public release, but we are exploring options to make different versions of the code available for both research and outreach applications.
