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这个大师课将讲解Houdini 18中新的Vellum约束特性，其中有讲解对工作流程的增强。包括根据密度自动计算质量和厚度，使其更容易处理不同分辨率的几何体。将子步骤上的压力计算统一化，省去更改子步骤时必须调整阈值的麻烦。新的约束特征包括了刚度下降，切线刚度，缝到到原始位置，stitch与吸附限制的滑动，和ARAP约束，这对模拟有机材料/软体和需要良好的拉伸和压缩行为的东西很有效。
This masterclass will cover new Vellum constraint features in Houdini 18, some of which are workflow enhancements. This includes automatically computing mass and thickness based on density, making it easier to work with geometry of different resolutions. Normalizing stress computations over substeps, will save you the hassle of having to adjust threshold values when changing substeps. For the new constraint features, there are Stiffness Dropoff, Tangent Stiffness, Stitch to primitive location, Sliding for Stitch and Attach constraints, and ARAP constraints which are effective for simulating organic material/softbody and things that require good stretching and compression behaviour. |
