// gunsticks little pattern player
// has several routines displaying various patterns
// using x/y coords or window addresses

#include <Adafruit_GFX.h>   // Core graphics library
#include <RGBmatrixPanel.h> // Hardware-specific library

#define CLK 8  // MUST be on PORTB!
#define LAT A3
#define OE  9
#define A   A0
#define B   A1
#define C   A2
RGBmatrixPanel matrix(A, B, C, CLK, LAT, OE, false);

void setup() {
  matrix.begin();

  //myWindows(random(1,21));
  int window = 13;
  int brightness = 255;
  int del = 100;
  // White is 7,7,7 (3bit) 255,255,255 (8bit)
  uint8_t red=255, green=255, blue=255;

int x=0;
int y=0;
int pos=0;
int patternSwitcher=0;
while ( true ) {
  switch(patternSwitcher) {
    case 0:
    case 1:   // this will repeat the following patterns 3 times
    case 2: {
      // scan through line by line from top to bottom
      myWindows(xyToWindow(x,y), brightness, red, green, blue);
      if(x++>3) {
        x=0;
        if(y++>4) {
          y=0;
          patternSwitcher++;
        }
      }
      break;
    }
    case 3:
    case 4: {
      // move a pixel around a path
      int path[] =   { 1, 6,11,16,
                       17,18,19,20,
                       15,10, 5,
                        4, 3, 2,
                        7,12,13,14,9,8,
                        7,12,13,14,
                       15,10,5,4,3,2,
                       0};
      myWindows(path[pos], brightness, red, green, blue);
      pos++; 
      if(path[pos]==0) { pos=0; patternSwitcher++; }
      break;
     }
     case 5:
     case 6:
     case 7:
     case 8: {
       // top bottom line wiper
       for(x=0;x<4;x++)
         myWindows(xyToWindow(x,y), brightness, red, green, blue);
       if(y++>4) {
         y=0;
         patternSwitcher++;
       }
     }
  default:
        patternSwitcher=0;
      break;      
  }
  delay(del);
  // fill the screen with 'black'
  matrix.fillScreen(matrix.Color888(0, 0, 0));
  matrix.swapBuffers(false);
}

}

int xyToWindow(int x, int y) {
  // this uses the building true xy coords like a screen
  // so pixel 0,0 is top left
  // pixel 3,4 is bottom right
  // 1,0->6 =1 + x*5 + y
  // 3,0->16=1 x x*5
  // 2,3->14=1 +x*5 +y
  return (1+x*5+y);
}

  int myWindows (int w, int br, int r, int g, int b){
  
switch (w) {
  case 1:
    // Window 1
    matrix.fillRect(1,12,4,3, matrix.Color888(r,g,b));
    break;
  case 2:
    // Window 2
    matrix.fillRect(7,12,4,3, matrix.Color888(r,g,b));
    break;
  case 3:
    // Window 3
    matrix.fillRect(13,12,4,3, matrix.Color888(r,g,b));
    break;
  case 4:
    // Window 4
    matrix.fillRect(19,12,4,3, matrix.Color888(r,g,b));
    break;
  case 5:
    // Window 5
    matrix.fillRect(25,12,4,3, matrix.Color888(r,g,b));
    break;
  case 6:
    // Window 6
    matrix.fillRect(1,8,4,3, matrix.Color888(r,g,b));
    break;
  case 7:
    // Window 7
    matrix.fillRect(7,8,4,3, matrix.Color888(r,g,b));
    break;
  case 8:
    // Window 8
    matrix.fillRect(13,8,4,3, matrix.Color888(r,g,b));
    break;
  case 9:
    // Window 9
    matrix.fillRect(19,8,4,3, matrix.Color888(r,g,b));
    break;
  case 10:
    // Window 10
    matrix.fillRect(25,8,4,3, matrix.Color888(r,g,b));
    break;
  case 11:
    // Window 11
    matrix.fillRect(1,4,4,3, matrix.Color888(r,g,b));
    break;
  case 12:
    // Window 12
    matrix.fillRect(7,4,4,3, matrix.Color888(r,g,b));
    break;
  case 13:
    // Window 13
    matrix.fillRect(13,4,4,3, matrix.Color888(r,g,b));
    break;
  case 14:
    // Window 14
    matrix.fillRect(19,4,4,3, matrix.Color888(r,g,b));
    break;
  case 15:
    // Window 15
    matrix.fillRect(25,4,4,3, matrix.Color888(r,g,b));
    break;
  case 16:
    // Window 16
    matrix.fillRect(1,0,4,3, matrix.Color888(r,g,b));
    break;
  case 17:
    // Window 17
    matrix.fillRect(7,0,4,3, matrix.Color888(r,g,b));
    break;
  case 18:
    // Window 18
    matrix.fillRect(13,0,4,3, matrix.Color888(r,g,b));
    break;
  case 19:
    // Window 19
    matrix.fillRect(19,0,4,3, matrix.Color888(r,g,b));
    break;
  case 20:
    // Window 20
    matrix.fillRect(25,0,4,3, matrix.Color888(r,g,b));
    break;

  default:
      break;      
}
  }

void loop() {
  // do nothing
}