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OpenGL Data Visualization Cookbook

You're reading from   OpenGL Data Visualization Cookbook Over 35 hands-on recipes to create impressive, stunning visuals for a wide range of real-time, interactive applications using OpenGL

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Product type Paperback
Published in Aug 2015
Publisher Packt
ISBN-13 9781782169727
Length 298 pages
Edition 1st Edition
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Table of Contents (11) Chapters Close

Preface 1. Getting Started with OpenGL 2. OpenGL Primitives and 2D Data Visualization FREE CHAPTER 3. Interactive 3D Data Visualization 4. Rendering 2D Images and Videos with Texture Mapping 5. Rendering of Point Cloud Data for 3D Range-sensing Cameras 6. Rendering Stereoscopic 3D Models using OpenGL 7. An Introduction to Real-time Graphics Rendering on a Mobile Platform using OpenGL ES 3.0 8. Interactive Real-time Data Visualization on Mobile Devices 9. Augmented Reality-based Visualization on Mobile or Wearable Platforms Index

Setting up a virtual camera for 3D rendering

Rendering a 3D scene is similar to taking a photograph with a digital camera in the real world. The steps that are taken to create a photograph can also be applied in OpenGL.

For example, you can move the camera from one position to another and adjust the viewpoint freely in space, which is known as viewing transformation. You can also adjust the position and orientation of the the object of interest in the scene. However, unlike in the real world, in the virtual world you can position the object at any orientation freely without any physical constraints, termed as modeling transformation. Finally, we can exchange camera lenses to adjust the zoom and create different perspectives the process is called projection transformation.

When you take a photo applying the viewing and modeling transformation, the digital camera takes the information and creates an image on your screen. This process is called rasterization.

These sets of matrices—encompassing...

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