ofxAffinetransformation

Affine Triansformation addons for openframeworks

Study from Prof.LeeByungGook

Reference:

• Smarter Presentations: Exploiting Homography in Camera-Projector Systems
• Affine transformation

Requirements

• openFrameworks 0.8.4+

Test Environments

• Windows 10 + Visual Studio 2015

Getting Started

Just following under step, you will know how to use ofxAffinetransformation. For this I'm using openFrameworks 0.8.4+ for window.

1. After downloading or cloning ofxAffinetransformation, place the folder in your openframeworks addons folder.

2. Create a new oF project using the project generator, make sure ofxAffinetransformation is enabled from the list of addons shown.

• Run openframeworks/projectGenerator/projectGenerator.exe
• Write name -> Choose path -> Click Addons -> Select ofxAffinetransformation -> Click BACK -> Click GENERATE PROJECT
• Open the project in Visual Studio
• Open file ofApp.h and include header file like this:

#include "ofMain.h
#include "ofxAffinetransformation.h"

• Add initialize code in ofApp.h

class ofApp : public ofBaseApp {
  public:
  ...
      ofxAffineTransformation aT;
}

• Open ofApp.cpp file and add setting code

void ofApp::setup() {
  aT.setCross(128);
  aT.calAffineTransform(false);
}
void ofApp::mouseMoved(int x, int y ){
	aT.checkCross();
	aT.applyAffineTransformation(x, y);
}
void ofApp::mouseDragged(int x, int y, int button){
	if (button == OF_MOUSE_BUTTON_LEFT)
		aT.updateCross();
}
void ofApp::mouseReleased(int x, int y, int button){
	aT.releaseCross();
}