CAJ | 학술논문

三维模型外观瑕疵模拟一直是真实感绘制中的热点问题。为了增强自然环境下场景的真实感，提出一种模拟被雨流冲刷三维模型外观的方法。首先提出三维模型在自然环境中的暴露程度、三维模型表面法向与污染源方向对模型表面的污染程度的定义，并对污渍堆积进行模拟；然后针对三维模型表面高斯曲率与平均曲率确定凹凸区域；最终剔除凸区域的污渍并绘制凹区域的污渍，模拟雨流冲刷后的表面。将文中方法应用到多个三维模型进行实验并与其他方法进行比较的结果表明，该方法对于模拟被雨水冲刷三维模型的外观简单、可行，并且具有很强的真实感。
삼유모형외관하자모의일직시진실감회제중적열점문제。위료증강자연배경하장경적진실감，제출일충모의피우류충쇄삼유모형외관적방법。수선제출삼유모형재자연배경중적폭로정도、삼유모형표면법향여오염원방향대모형표면적오염정도적정의，병대오지퇴적진행모의；연후침대삼유모형표면고사곡솔여평균곡솔학정요철구역；최종척제철구역적오지병회제요구역적오지，모의우류충쇄후적표면。장문중방법응용도다개삼유모형진행실험병여기타방법진행비교적결과표명，해방법대우모의피우수충쇄삼유모형적외관간단、가행，병차구유흔강적진실감。
3D model blemishes simulation has always been a hot issue in the research of photo-realistic rendering. In this paper, we propose a method to simulate the appearances of the 3D models washed by the rain. Firstly, we defines the exposure degree of the 3D models in the natural environment and the contamination degree of the ap-pearances of the 3D models influenced by the surface normal and the direction of the pollution sources. And then we simulate the phenomenon of dust accumulation on the model appearance. Thirdly, the mean curvature and Gaussian curvature are analyzed to determine the convex and concave areas. Finally, we remove the stains in the convex region and render the stains in the concave area to simulate the appearance of 3D models washed by the rain. We apply our method to more 3D models. Compared with others methods, ours is more practical, simpler and has a stronger sense of reality.