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Vulkan Cookbook

You're reading from   Vulkan Cookbook Work through recipes to unlock the full potential of the next generation graphics API—Vulkan

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Product type Paperback
Published in Apr 2017
Publisher Packt
ISBN-13 9781786468154
Length 700 pages
Edition 1st Edition
Languages
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Author (1):
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Pawel Lapinski Pawel Lapinski
Author Profile Icon Pawel Lapinski
Pawel Lapinski
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Toc

Table of Contents (13) Chapters Close

Preface 1. Instance and Devices FREE CHAPTER 2. Image Presentation 3. Command Buffers and Synchronization 4. Resources and Memory 5. Descriptor Sets 6. Render Passes and Framebuffers 7. Shaders 8. Graphics and Compute Pipelines 9. Command Recording and Drawing 10. Helper Recipes 11. Lighting 12. Advanced Rendering Techniques

Drawing billboards using geometry shaders

Simplifying geometry drawn in a distance is a common technique for lowering the processing power needed to render the whole scene. The simplest geometry that can be drawn is a flat quad (or a triangle) with an image depicting the look of an object. For the effect to be convincing, the quad must always be facing camera:

Flat objects that are always facing camera are called billboards. They are used not only for distant objects as the lowest level of detail of a geometry, but also for particle effects.

One straightforward technique for drawing billboards is to use geometry shaders.

How to do it...

  1. Create a logical device with the geometryShader feature enabled (refer to the Getting features and properties of a physical device...
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