Modeling and rendering of weathered stone
Modeling and rendering of weathered stone
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DOI：
10.1145/1185657.1185724
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发表时间：
1999-07
期刊：
影响因子：
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通讯作者：
Julie Dorsey;A. Edelman;H. Jensen;Justin Legakis;H. Pedersen
中科院分区：
文献类型：
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作者：
Julie Dorsey;A. Edelman;H. Jensen;Justin Legakis;H. Pedersen
石头被广泛用作建筑材料和艺术媒介。它最显著的特性之一是它在与环境相互作用时会改变外观。这些变化主要局限于表面，但涉及复杂的体积效应，如侵蚀和矿物溶解。本文提出了一种石头形状和外观变化的建模和绘制方法，为了表示石头，我们引入了一个slab数据结构，它是一个限制在石头边界周围狭窄区域内的表面对齐体。我们的风化模型采用了模拟水分的流动和运输，溶解和矿物的重结晶在多孔石材体积。此外，该模型还控制着表面材料的侵蚀。为了呈现由于表面附近的矿物成分而导致的半透明和着色的光学效果，我们使用一般的地下蒙特卡罗射线追踪器模拟石头内部的光散射。这些技术可以捕获石头随时间变化的外观的许多方面。我们展示了花岗岩和大理石雕像的模型，以及砂岩柱的方法。
Stone is widespread in its use as a building material and artistic medium. One of its most remarkable qualities is that it changes appearance as it interacts with the environment. These changes are mainly confined to the surface but involve complex volumetric effects such as erosion and mineral dissolution. This paper presents an approach for the modeling and rendering of changes in the shape and appearance of stone.To represent stone, we introduce a slab data structure, which is a surface-aligned volume confined to a narrow region around the boundary of the stone. Our weathering model employs a simulation of the flow of moisture and the transport, dissolution, and recrystallization of minerals within the porous stone volume. In addition, this model governs the erosion of material from the surface. To render the optical effects of translucency and coloration due to the composition of minerals near the surface, we simulate the scattering of light inside the stone using a general subsurface Monte Carlo ray tracer. These techniques can capture many aspects of the time-dependent appearance of stone. We demonstrate the approach with models of granite and marble statues, as well as a sandstone column.