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Mastering openFrameworks: Creative Coding Demystified

You're reading from   Mastering openFrameworks: Creative Coding Demystified openFrameworks is the doorway to so many creative multimedia possibilities and this book will tell you everything you need to know to undertake your own projects. You'll find creative coding is simpler than you think.

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Product type Paperback
Published in Sep 2013
Publisher Packt
ISBN-13 9781849518048
Length 364 pages
Edition 1st Edition
Languages
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Author (1):
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Denis Perevalov Denis Perevalov
Author Profile Icon Denis Perevalov
Denis Perevalov
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Table of Contents (22) Chapters Close

Mastering openFrameworks: Creative Coding Demystified
Credits
Foreword
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
1. openFrameworks Basics FREE CHAPTER 2. Drawing in 2D 3. Building a Simple Particle System 4. Images and Textures 5. Working with Videos 6. Working with Sounds 7. Drawing in 3D 8. Using Shaders 9. Computer Vision with OpenCV 10. Using Depth Cameras 11. Networking Working with Addons Perlin Noise Index

Texturing


You can wrap any image or texture on the surface using the mesh.addTexCoord( texPoint ) function. Here texPoint is of the ofPoint type. It is a 2D point that should lie in range [0, w] × [0, h], where w × h is the size of the image that you want to use as a texture. Remember that you should call this function as many times as you call the mesh.addVertex() function so that all the vertices will have texture coordinates.

During rendering each primitive of the mesh (whether triangle, line, or point depends on the mesh's mode), the texture coordinates of each rendered pixel will be calculated by OpenGL as interpolation of texture coordinates of the primitive's vertices. Resulting texture coordinates for the pixel are used for the pixel's color computing. In other words, the final pixel color is computed using three values: the color given by the texture, the color of the last ofSetColor() calling, and the shading information obtained from the light and normals data. To change the algorithm...

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