// Demo using arcFill to draw ellipses and a segmented elipse
//#include <TFT_eSPI.h> // Hardware-specific library
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
#include <SPI.h>

//TFT_eSPI tft = TFT_eSPI();       // Invoke custom library
#define TFT_DC 21
#define TFT_CS 22
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

#define DEG2RAD 0.0174532925
#define LOOP_DELAY 10 // Loop delay to slow things down

#define ENCODER_CLK 14
#define ENCODER_DT  12
#define ENCODER_SW  13

#define RED2RED 0
#define GREEN2GREEN 1
#define BLUE2BLUE 2
#define BLUE2RED 3
#define GREEN2RED 4
#define RED2GREEN 5


int counter = 0;

byte inc = 0;
unsigned int col = 0;

byte red = 31; // Red is the top 5 bits of a 16 bit colour value
byte green = 0;// Green is the middle 6 bits
byte blue = 0; // Blue is the bottom 5 bits
byte state = 0;

int tempValue = 0;

void setup(void) {

  tft.begin();
  tft.setRotation(1);
//  tft.fillScreen(TFT_BLACK);
  tft.fillScreen(ILI9341_BLACK);
}


void loop() {

  int x = tft.width() / 2;
  int y = tft.height() / 2;
  int radius = 50;
  int start = 45;
  int end = 135;
  int color = ILI9341_GREEN;
  int thickness = 10;
  
  //tft.fillCircle(x, y, radius, color);
  //tft.drawCircle(x, y, radius, ILI9341_DARKGREEN);
  drawArc(x, y, radius, thickness, start, end, ILI9341_DARKGREEN);
  //fillArc(x, y, radius - thickness, start, end, color);
}
void drawArc(int x, int y, int radius, int w, int start, int end, int color) {
  int x1, y1, x2, y2;
  float angle;
  
  int j = 0;
    for (int i = start; i <= end; i++) {
      angle = i * 0.0174532925;
      x1 = x + (radius * cos(angle));
      y1 = y + (radius * sin(angle));
      x2 = x + (radius - w * cos(angle));
      y2 = y + (radius - w * sin(angle));
      if (i == start || i == end) {
        tft.drawLine(x1, y1, x2, y2, color);
      }
      tft.drawPixel(x1, y1, color);
      tft.drawPixel(x2, y2, color);
    }
}

void fillArc(int x, int y, int radius, int start, int end, int color) {
  int x1, y1, x2, y2;
  float angle;
  
  for (int i = start; i < end; i++) {
    angle = i * 0.0174532925;
    x1 = x + (radius * cos(angle));
    y1 = y + (radius * sin(angle));
    x2 = x + ((radius - 1) * cos(angle));
    y2 = y + ((radius - 1) * sin(angle));
    tft.drawLine(x1, y1, x2, y2, color);
  }
}