本教程是由cmiVFX机构出品的Houdini流程化建模教程，教程使用软件：Houdini，大小：715 MB，MP4视频格式，作者：david gary，语言：英语。

本教学是作为流程化建模基础知识的详细地图与扩展，这个创新性的视频是CMIVFX发布的第一套基于项目的HOUDINI教学。本教学将带领大家学习HOUDINI的建模工具，让开始为视觉特效风格的构建与破坏过程制作场景。我们假定需要让一辆军车爆炸为很多细小的部分，那么创建它的时候就需要考虑到流程化破坏的过程。还或者我们希望让一些坦克跟随着游行的队伍，同步的运动，让它们与自己的敌人战斗，这样我们就能来学习高级的CHOPS与行为动画的粒子系统。通过这种方式你就能明白到在HOUDINI中你能做任何的事情。

Houdini 是一个特效方面非常强大的软件。许多电影特效都是由它完成：指环王中“甘道夫”放的那些“魔法礼花”，还有“水马”冲垮“戒灵”的场面，后天中的龙卷风等等，a52的汽车广告，反正只要是涉及DD公司制作的好莱坞一线大片，几乎都会有Houdini参与和应用。

Houdini不光只适用于视觉特效的制作，随着HOUDINI适用于各种平台，并且出现了很多的HOUDINI培训教学，HOUDINI开始进入了动态图像设计领域****。因为其自身的流程化特性，加上其强大的动力学系统，让HOUDINI在数据可视化方面占有一席重要的地位，让图形设计师能够通过它表达自己的观点。

cmiVFX Houdini Intro to Procedural Modeling

Designed to be a detailed map and extension of the fundamental concepts of procedural modeling, this innovative video is the first entirely project-based video released by cmiVFX for Houdini. This video will take you through a functional tour of the modeling tools in Houdini, to get you started in creating large scale sets for your later visual effects style construction OR destruction. The challenge was to find which effect could combine the maximum diversity of training content, while keeping the consistency and the realism/reality of a project-based approach. Let’s suppose we wanted to explode a military style vehicle into a bunch of smaller portions, we would need to build it with the procedural deconstruction in mind. Let’s also assume that we want some tanks to follow a parade, or to move in synchronicity, or interacting with their enemies, this allow us to teach cg-ku.com advanced CHOPs and particles for behavioral animation. That’s the only way to show you that you can do absolutely everything in Houdini and from A to Z, with total flexibility.Houdini has the reputation of being the most powerful effects application in the world. cmiVFX aims to show you how and why.

Applying Concepts

Knowing theory is good but it's just the first part of the journey. This video is meant to teach application and a truly fathom the fundamentals. Put all your knowledge together and create a real scene. We chose to model a tank, inspired from the T-55 russian model, because it had a rich set of modeling features. Learn new modeling techniques, both procedural and non procedural. - Keywords: houdini training, sidefx

Rigging Caterpillars

The tank follows a path on a bumpy terrain . One of the main challenges of the modeling is to create a pair of caterpillars and a set of wheels that properly adapt to the terrain as the tank goes on.The tank is modeled in relation to a future animation. The same as with characters we refer to this process as rigging a vehicle. Here, Houdini's non-procedural paradigm fuses with animation, since the animation now become the input of your modeling process ( like in the famous CHOP-based scene of the film The Grinch).

Modeling Variety

This project has all the types of modeling, polygonal, nurbs, subdivided polygons, and painting details. We show you a great diversity of SOPs. Extrude, bevel, creep, refine, trim, carve, intersect, fillet, join polywire and the list goes on. Some tactics are more explicitly procedural. Some other are more artistic. Like real-world scenarios which are always a blend of both.

Polygonal Modeling Tools

Groups, procedural selection, beveling, creeping, and joining... Houdini has an extremely powerful set of polygonal tools, and we will show you how to make the best of them in a fair amount of time.

NURBs Modeling

Before we dive into nurbs modeling, we make a quick yet thorough reminder about NURBS, their properties. Isoparms, profiles, parameterization, topology, stitching, detailed u/v skinning scenarios are covered. These are some concepts you must be familiar with to be proficient with NURBS. Learn Houdini's very specific way to work with NURBS and how you can define more complex NURBS surfaces than in the other softwares.

Creating Details

In this section, we introduce you to a very Houdini way of working. Add some details on your tank, like grips for the driver of the tank or rivets. Instead of tediously placing them, or using a displacement map, paint them. Learn how you can combine painting with any operator of Houdini to interactively and artistically create some details like grips on the tank.

Putting It All Together

This video is intended to be the first step in creating a scene. You want to apply a camouflage shadier for you tank, you want to add grass, global illumination. You want to instantiate your tanks, and drop a bomb on them. Instead of creating a scene out of pre-built elements coming from nowhere, we build each step with Houdini.

The Author

David Gary, french, and has a Bachelor Degree in Pure Mathematics, a Master Degree in Philosophy and is preparing his PhD in the interdisciplinary field of philosophy of mathematics, phenomenology and cognitive sciences. Aside of his studies, he's directed a dozen of short movies and video clips, being a director/video instructor. He began to be a strong CG specialist since a long time using various tools as 3dsmax, Maya, Houdini.

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