Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Kivy Cookbook
  • Table Of Contents Toc
  • Feedback & Rating feedback
Kivy Cookbook

Kivy Cookbook

By : Hugo Solis, Solis
2.5 (2)
close
close
Kivy Cookbook

Kivy Cookbook

2.5 (2)
By: Hugo Solis, Solis

Overview of this book

Kivy is an open-source Python library for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps. It is a promising Python framework to develop UI and UX apps in a cross-platform environment, under the Python philosophy. Kivy Cookbook is a practical book that will guide you through the Kivy framework to develop apps and get your apps ready for distribution in App Store and Android devices. You will start off with installing Kivy and building your interfaces. You will learn how to work the accelerometer and create custom events. Then, you will understand how to use the basics, buttons, labels and text inputs and manipulate the widget tree. Next, you will be able to work with manipulating instructions, create an atlas and layouts. Moving on, you will learn packing for Windows and packing for iOS, and use TestDrive. By the end of the book, you will have learnt in detail the relevant features and tools in Kivy and how to create portable packages to distribute your apps in the most used platforms.
Table of Contents (11 chapters)
close
close
10
Index

Editing shaders


Kivy, of course, permits us to work with shaders. The shaders calculate rendering effects with the help of the GPU. In this recipe, we will use a predefined shader that we will load from a glsl file, which is the common extension of the OpenGL Shading Language (GLSL).

Getting ready

We are going to need a glsl file to work with in this recipe; there exist thousands free on the Web.

Note

A nice place to look is the site http://www.iquilezles.org/apps/shadertoy/index2.html where you could find your favorite.

Also, you should be familiar with some concepts about shaders, so you can start reading the Wikipedia article at http://en.wikipedia.org/wiki/OpenGL_Shading_Language.

How to do it…

In this recipe, we will use the KV, Python, and glsl files of our choice. In the KV file, we will provide the size and position of the shader in the app, and in the Python file, we will set the behavior of the shader. Let's follow the next steps:

  1. Open the glsl file and add the next header after the #endif...

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech

Create a Note

Modal Close icon
You need to login to use this feature.
notes
bookmark search playlist font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Delete Note

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Edit Note

Modal Close icon
Write a note (max 255 characters)
Cancel
Update Note

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY