Basic OOP in Processing

gistfile1.pde

// --- Processing ---//
/*
Declare and construct an object from the class HLine 
Processing requires that you state the type of a variable when you initialize it.
The type here is HLine
*/
HLine h1 = new HLine(20, 2.0); 
 
// show the ypos property of h1
print(h1.ypos);

class HLine { 
	// Properties, like variables, must include the data type. Here it's float.
  	float ypos, speed; 
	// The constructor
	// In Processing the constructor is named the same as the class	
  	HLine (float y, float s) {  
		// In Processing, you don't have to use 'this' to get a property
    		ypos = y; 
    		speed = s; 
  	}
	/* 
           methods in Processing have to start with the data type of the return value
	   this function doesn't return anything, so it starts with "void"
	   all parameters also have to have a data type
         */
	void doSomething(int num) {
		// do something
    	}
}