Aesthetic surface mesh modification, guided by a deforming feature line, is still a challenging task. Whereas most existing surface deformation methods work well when the new surface is stretched or isometrically deformed, in case of areas subjected to compression, unwanted bulging may appear. This configuration typically appears when a designer slides a feature line along the input surface. In this paper, we present a new approach for feature line modification solving the surface bulging problem. We consider physically-based deformation methods applied to surface meshes and characterize configurations that produce compression loading from a mechanical standpoint. Then, the deformation area is decomposed into two sub-domains with a boundary modification of the one subjected to compression loading. Thus, during a subsequent deformation, this sub-domain no longer undergoes a compression loading but rather a traction loading, which ultimately prevents bulging. This transformation looks like a retraction of this surface area and a corresponding processing pipeline is set up.

Our feature line modification method is intuitive to use and runs interactively, making it attractive to be used during design reviews in immersive environments. Industrial examples and comparisons with state-of-the-art physically-based deformation methods validate the proposed approach.

由变形特征线引导的美学表面网格修改仍然是一项具有挑战性的任务。虽然大多数现有的表面变形方法在新表面被拉伸或等距变形时效果很好，但在区域受到压缩的情况下，可能会出现不需要的凸起。当设计者沿输入表面滑动要素线时，通常会出现此配置。在本文中，我们提出了一种新的特征线修改方法来解决表面膨胀问题。我们考虑应用于表面网格的基于物理的变形方法，并从机械角度表征产生压缩载荷的配置。然后，变形区域被分解为两个子域，其中一个子域受到压缩载荷的边界修改。因此，在随后的变形过程中，这个子域不再承受压缩载荷，而是承受牵引载荷，最终防止膨胀。这种转换看起来像是这个表面积的缩回，并建立了相应的处理管道。

我们的特征线修改方法使用直观且交互运行，使其在沉浸式环境中的设计审查期间使用很有吸引力。工业实例和与最先进的基于物理的变形方法的比较验证了所提出的方法。