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();
  }