Code snippets for Blog

1.java

class Walker {
    int x;
    int y;
    Walker() {
        // Constructor function to initailize data
        // width & height have the width & height of the output.
        x = width/2;
        y = height/2;
    }
}

2.java

void step(){
  int choice = int(random(4));
	if(choice == 0){
		x++;	// Move right
	}
	else if(choice == 1){
		x--;	// Move left
	}
	else if(choice == 2){
		y++;	// Move up
	}
	else {
		y--;	// Move down
	}
}

3.java

void step(){
	int choice = int(random(9));		
	
	if(choice == 0){
		x++;	// Move right
	}
	else if(choice == 1){
		x--;	// Move left
	}
	else if(choice == 2){
		y++;	// Move up
	}
	else if(choice == 3){
		y--;	// Move down
	}
	else if(choice == 4){
		// Move up-right
		x++;
		y++;	
	}
	else if(choice == 5){
		// Move up-left
		x--;
		y++;
	}
	else if(choice == 6){
		// Move down-left
		x--;
		y--;
	}
	else if(choice == 7){
		// Move down-right
		x++;
		y--;
	}
	// We don’t need to write code for staying
}

4.java

void step(){
	int xchoice = int(random(3));
	int ychoice = int(random(3));			
	
	if(xchoice == 0){
		x++;	// Move right
	}
	else if(xchoice == 1){
		x--;	// Move left
	}
	if(ychoice == 0){
		y++;	// Move up
	}
	else if(ychoice == 1){
		y--;	// Move down
	}
	
}

5.java

void step(){
	x += int(random(3)) – 1;	// int(random(3)) – 1; returns -1, 0 or 1
	y += int(random(3)) - 1;				
}