Book Image

Cinder Creative Coding Cookbook

Book Image

Cinder Creative Coding Cookbook

Overview of this book

Cinder is one of the most exciting frameworks available for creative coding. It is developed in C++ for increased performance and allows for the fast creation of visually complex, interactive applications."Cinder Creative Coding Cookbook" will show you how to develop interactive and visually dynamic applications using simple-to-follow recipes.You will learn how to use multimedia content, draw generative graphics in 2D and 3D, and animate them in compelling ways. Beginning with creating simple projects with Cinder, you will use multimedia, create animations, and interact with the user.From animation with particles to using video, audio, and images, the reader will gain a broad knowledge of creating applications using Cinder.With recipes that include drawing in 3D, image processing, and sensing and tracking in real-time from camera input, the book will teach you how to develop interesting applications."Cinder Creative Coding Cookbook" will give you the necessary knowledge to start creating projects with Cinder that use animations and advanced visuals.
Table of Contents (19 chapters)
Cinder Creative Coding Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Creating a height map from an image


In this recipe, we will learn how to create a point cloud based on an image selected by the user. We will create a grid of points where each point will correspond to a pixel. The x and y coordinates of each point will be equal to the pixel's position on the image, and the z coordinate will be calculated based on its color.

Getting ready

Include the necessary files to work with OpenGL, image surfaces, VBO meshes, and loading images.

Add the following code to the top of the source file:

#include "cinder/gl/gl.h"
#include "cinder/Surface.h"
#include "cinder/gl/Vbo.h"
#include "cinder/MayaCamUI.h"
#include "cinder/ImageIo.h"

Also, add the following using statements:

using namespace ci;
using namespace ci::app;
using namespace std;

How to do it…

We will learn how to read pixel values from an image and create a point cloud.

  1. Declare ci::Surface32f to store the image pixels, ci::gl::VboMesh that we will use as the point cloud, and ci::MayaCamUI for easy rotation of our...