2D drawing

The basic drawing functions are the following (see Chapter 2, Creating Your First openFrameworks Project, for details):

Example of function usage	Description
ofBackground( ofColor::white );	This sets the background to the white color.
float w = ofGetWidth();	The ofGetWidth() function returns the current width of the application's screen in pixels. In this code, this value is set to the variable w.
float h = ofGetHeight();	The ofGetHeight() function returns the current height of the application's screen in pixels. In this code, this value is set to the variable h.
ofLine( 100, 200, 300, 400 );	This draws a line segment connecting the points (100, 200) and (300, 400).
ofRect( 100, 200, 300, 400 );	This draws a rectangle with the top-left corner (100, 200), a width of 300 pixels, and a height of 400 pixels. The ofSetRectMode( OF_RECTMODE_CENTER ) command enables the mode for specifying the center of the rectangle instead of the top-left corner. The...