Houdini School – HS-236: Velocity Forces 2.0: Advanced

“速度力量 2.0：高级”是一门深入的课程，在“速度力量 1.0”的基础上进行了扩展。它深入探讨了如何创建速度场，探索了 Houdini 标准体积和 OpenVDB 体积之间的差异。

本课程重点介绍一些技巧，帮助您优化速度场、将多个场混合在一起，并使用替代模拟输出实现独特的运动。您将学习如何创建涡流、利用尾流湍流力增强模拟效果，以及如何将额外的详细运动注入低分辨率烟雾模拟中。此外，本课程还将介绍 2D 平面和 3D 几何体上的体积光流场，以及利用势流节点实现 3D 表面平流。

本课程还将展示如何超越基于体积的字段进入动态 VEX 编码，减少体积缓存开销，同时处理从矩阵和四元数到交叉积和矢量数学的高级数学概念。

学习成果：
学生将更全面地了解 Houdini 中的体积、高级 VEX 计算以及如何利用强大的本机节点在模拟中生成更复杂的运动。

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课程大纲

1. 简介
2. 项目设置
3. 成交量基本原理
4. VDB
5.VDB 的结构

“Velocity Forces 2.0: Advanced” is an in-depth class expanding on “ Velocity Forces 1.0”. It delves deeper into creating velocity fields, exploring the differences between Houdini Standard Volumes and OpenVDB volumes.

The course focuses on techniques to help you refine velocity fields, blend multiple fields together, and use alternative simulation outputs for unique movement. You’ll learn how to create vorticles, enhance simulations with wake turbulence forces, as well as injecting extra detailed motion into low-resolution smoke sims. Additionally, this class will cover volume optical flow fields on both 2D planar and 3D geometry, plus utilizing the Potential Flow node for 3D surface advection.

This class will also show how to move beyond volume-based fields into dynamic VEX coding, reducing the volume caching overhead, while also tackling advanced mathematical concepts, from matrices and quaternions to cross products and vector math.

Learning Outcomes:
Students will walk away with a more complete understanding of volumes in Houdini, advanced VEX computations, and how to utilize powerful native nodes to generate more intricate motion in their simulations.

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Course curriculum

1. Introduction
2. Project Setup
3. Volume Fundamentals
4. VDB
5. Structure of VDB