ofImage image;

This is an image class, which holds equal data in the RAM and video memory.

ofPixels pixels;

This is an image class, which holds data in RAM only.

ofTexture texture;

This is an image class, which holds data in video memory only.

ofVideoPlayer video;

This is a video player class.

ofVideoGrabber camera;

This a class for grabbing frames from a camera.

ofFbo fbo;

This is a buffer for offscreen drawing.

ofShader shader;

This is a shader class, which contains a vertex, fragment and, optionally, geometry shader programs.

ofMesh mesh;

This is a class for representing and drawing a set of primitives, such as triangles, lines, or points.

The ofEnableDepthTest() command enables Z-buffering for proper drawing of 3D objects, and the ofDisableDepthTest() command disables it back.

ofSpherePrimitive sphere;

This is a class for representing and drawing a sphere in 3D. Also, there are the ofPlanePrimitive, ofSpherePrimitive, ofIcoSpherePrimitive, ofCylinderPrimitive, and ofConePrimitive classes for representing other simple geometrical objects.

ofEasyCam cam;

This is a camera for 3D drawing.

ofLight light;

This is the light source for 3D drawing.

ofMaterial material;

These are the material properties for 3D drawing.

ofSoundPlayer sound;

This is the sound player class.

ofxOscReceiver oscReceiver;

This is the receiver of OSC networking messages (it requires the ofxOsc addon).

ofxOscSender oscSender;

This is the sender of OSC networking messages (it requires the ofxOsc addon).

ofSerial serial;

This is the class for serial port communication with devices such as Arduino.