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Procedural 3D Modeling Using Geometry Nodes in Blender

You're reading from   Procedural 3D Modeling Using Geometry Nodes in Blender Discover the professional usage of geometry nodes and develop a creative approach to a node-based workflow

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Product type Paperback
Published in Mar 2023
Publisher Packt
ISBN-13 9781804612552
Length 282 pages
Edition 1st Edition
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Siemen Lens Siemen Lens
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Table of Contents (23) Chapters Close

Preface 1. Part 1 – Familiarizing Yourself with the Node System
2. Chapter 1: An Introduction to Geometry Nodes FREE CHAPTER 3. Chapter 2: Understanding the Functionality of Basic Nodes 4. Chapter 3: Must-Have Add-ons for Building Node Trees 5. Part 2 – Creating a Mesh in the Geometry Node System
6. Chapter 4: Making Use of Node Primitives 7. Chapter 5: Distributing Instances onto a Mesh 8. Chapter 6: Working with the Spreadsheet in Blender 9. Chapter 7: Creating and Modifying Text in the Geometry Node Editor 10. Part 3 – Modifying Meshes and Curves in the Geometry Node System
11. Chapter 8: Editing Curves with Nodes 12. Chapter 9: Manipulating a Mesh Using Geometry Nodes 13. Part 4 – Hands-On Projects Involving Advanced Workflow Techniques
14. Chapter 10: Creating a Procedural Plant Generator 15. Chapter 11: Creating a Procedural Spiderweb Generator 16. Chapter 12: Constructing a Procedural LED Panel 17. Part 5 – Best Practices to Improve Your Workflow
18. Chapter 13: Tips and Tricks for the Geometry Node Editor 19. Chapter 14: Troubleshooting the Most Common Problems in Geometry Nodes 20. Index 21. Other Books You May Enjoy Appendix: Important Shortcuts

Creating our node tree

To make a procedural spiderweb generator, we will begin our journey by making use of a convex hull shape; after that, we will convert this convex hull shape into a wireframe, and we will join the original mesh with this wireframe.

But first, let’s learn a little about convex hulls.

What’s a convex hull?

A convex hull is best explained as a version of a model that is cut from a block using only straight lines. This means that we won’t have any crevices in the model. The following figure shows in simple terms what a convex hull means on a vertex level:

Figure 11.6: A convex hull calculation

Figure 11.6: A convex hull calculation

In the following figure, you can see various examples of objects with convex hulls:

Figure 11.7: Convex hull examples

Figure 11.7: Convex hull examples

Creating a convex hull around our objects

Making a convex hull around our objects is very easy. There is a special node to do this in the Geometry Node editor, conveniently...

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