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Study of Visual Simulation of Snow and Ice Phenomena

冰雪现象可视化模拟研究

基本信息

批准号：
14380129
负责人：
MURAOKA Kazunobu
金额：
$ 3.46万
依托单位：
Tohoku Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14380129/
关键词：
Snow and ice phenomena Visual simulation Iandscape simulation Winter Snow cover Snow surface patterns つらら

项目摘要

This study aims to develop a technique that would realize a realistic simulation of a winter landscape. For this purpose, we developed the following methods:(1) Geometry distortion method of snow cover surface:A method to enable geometry distortion of a snow cover surface with the hardness of snow as a parameter. With this method, geometry distortion can be done according to the quality of snow.(2) Expression method of snow surface pattern:A method to enable automatic generation of snow surface patterns. As to snow penitents and snow dimples, a pattern is generated by performing a set operation for a snow cover surface. As to skavlers, barchans and ripples, a pattern is automatically generated with a method where simulations of cellular automata and particles are combined. With this method, the pattern of snow cover surface can be consecutively changed from barchan to ripple to skavler.(3) Expression method of snow accretion/ice accretion:A method to enable automatic generation of the pattern formed by the accretion of snowflakes and ice particles on substances. By applying this method for the shape of trees, patterns of soft rime are generated.(4) Fast-rendering method for expressing snow:A method to enable rendering the snow defined by particles. Fast rendering is possible with the use of the Z-buffer method and texture mapping.(5) Fast generation method of icicle:A method to enable automatic generation of icicle-like patterns in a procedural manner.

本研究旨在开发一种能够实现冬季景观真实模拟的技术。为此，我们开发了以下方法：（1）积雪表面几何畸变法：以雪的硬度为参数，实现积雪表面几何畸变的方法。通过该方法，可以根据雪的质量进行几何变形。(2)雪面图案的表达方法：一种能够自动生成雪面图案的方法。对于雪忏悔和雪凹痕，通过对雪覆盖表面进行设定操作来生成图案。对于斯卡夫勒、新月形和波纹，通过元胞自动机和粒子模拟相结合的方法自动生成图案。通过该方法，可以使积雪表面的图案从新月形到波纹状再到斯卡夫勒状连续变化。(3)雪积/冰积的表达方法：自动生成雪花和冰粒在物质上积雪形成的图案的方法。通过将该方法应用于树木的形状，生成软雾凇的图案。(4)表达雪的快速渲染方法：一种能够渲染由粒子定义的雪的方法。通过使用Z缓冲区方法和纹理映射可以实现快速渲染。(5)冰柱快速生成方法：一种能够以程序方式自动生成冰柱状图案的方法。