Maze

[Roflpantoffel]

Hello!

I'm making a maze game(which I'm controlling with my USBkey) with C in AVR studio. The problem I'm having is that I'm not really sure how to let my program check if the dot I'm controlling can go to a certain spot(x, y coordinate).

lcd_set_pixel(U16 X, U16 Y, U8 R, U8 G, U8 B)
lcd_set_pixel(5, 10, 255, 255, 255) // example

That's the way to set pixels.
Now I got my dot moving, but it can still go everywhere

  
static U16 y = 0; // starting position
static U16 x = 0;
 if(Is_joy_right())
          {
	_delay_ms(75);	
	lcd_set_pixel(x, y, 250,128,114); // setting last pixel to background color
	x++;                                             // changing the dot's position
	lcd_set_pixel(x, y, 0, 0, 255);      // drawing the dot
          }
if(Is_joy_left())
          {
	_delay_ms(75);	
	lcd_set_pixel(x, y, 250,128,114);
	x--;
	lcd_set_pixel(x, y, 0, 0, 255);
          }
if(Is_joy_down())
          {
	_delay_ms(75);	
	lcd_set_pixel(x, y, 250,128,114);
	y++;
	lcd_set_pixel(x, y, 0, 0, 255);
          }
if(Is_joy_up())
          {
	_delay_ms(75);	
	lcd_set_pixel(x, y, 250,128,114);
	y--;
	lcd_set_pixel(x, y, 0, 0, 255);
          }

Does any of you have an idea how to keep my code a bit compact(because if i have to draw every pixel with the set_pixel it will get messy + I wouldn't be sure how to check if it can go to a certain x, y coordinate), I was thinking of using an array, but I wasn't sure how to use it in this situation.

Regards,

Roflpantoffel

PS: yes, the RGB of my background color is salmon

[tabstop]

So define "can't go to a coordinate". Are you just talking about walking off the edge of the LCD display? If so, just check whether x and y are on the edges of the display. If you've got some other condition in mind, you'll have to check that condition.