#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <SPI.h>

#define TFT_CS   5
#define TFT_DC   2
#define TFT_RST  4

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

int hexSize = 12;

void drawHexagon(int x, int y, int r, uint16_t color) {
  float angle;
  int x0, y0, x1, y1;

  for (int i = 0; i < 6; i++) {
    angle = PI / 3 * i;
    x0 = x + r * cos(angle);
    y0 = y + r * sin(angle);
    angle = PI / 3 * (i + 1);
    x1 = x + r * cos(angle);
    y1 = y + r * sin(angle);
    tft.drawLine(x0, y0, x1, y1, color);
  }
}

void drawGraphene() {
  tft.fillScreen(ILI9341_BLACK);

  int offsetX = hexSize * 2;
  int offsetY = hexSize * 1.7;

  for (int row = 0; row < 12; row++) {
    for (int col = 0; col < 16; col++) {
      int x = col * offsetX + (row % 2) * hexSize;
      int y = row * offsetY;
      drawHexagon(x + 40, y + 40, hexSize, ILI9341_CYAN);
    }
  }
}

void setup() {
  tft.begin();
  tft.setRotation(1);
  drawGraphene();
}

void loop() {
  // Animación simple (opcional)
}