calibration pattern

calibration pattern

// useful for projection alignment, etc: 
// http://i.imgur.com/rWJLE.jpg



int nbOfCol = ofGetWidth() / 25;
	int boardWidth = ofGetWidth();
    int boardHeight = ofGetHeight();
    
    float squareSize = boardWidth / nbOfCol;
    int nbOfRow = ceil(boardHeight / squareSize);
    for (int colId = 0; colId < nbOfCol; colId++) {
        for (int rowId = 0; rowId < nbOfRow; rowId++) {
            if ((colId + rowId) % 2 == 0) {
                ofSetColor(ofColor::white);
            } else {
                ofSetColor(ofColor::black);
            }
            if ((rowId) % 6 == 0) {
                ofSetColor(  ofColor::fromHsb( (rowId * 50) % 255 , 255, 255));
            }
            else if ((colId) % 6 == 0) {
                ofSetColor(  ofColor::fromHsb((colId * 50) % 255 , 255, 255));
            }
            ofRect(colId * squareSize, rowId * squareSize, squareSize, squareSize);
        }
    }