pimoroni-pico/examples/breakout_colourlcd160x80/colorlcd_160x80_demo.cpp

#include <math.h>
#include <vector>

#include "drivers/st7735/st7735.hpp"
#include "libraries/pico_graphics/pico_graphics.hpp"

using namespace pimoroni;

ST7735 st7735(160, 80, get_spi_pins(BG_SPI_FRONT));
PicoGraphics_PenP8 graphics(st7735.width, st7735.height, nullptr);

int main() {
  st7735.set_backlight(255);

  struct pt {
    float      x;
    float      y;
    uint8_t    r;
    float     dx;
    float     dy;
    Pen      pen;
  };

  std::vector<pt> shapes;
  for(int i = 0; i < 1000; i++) {
    pt shape;
    shape.x = rand() % graphics.bounds.w;
    shape.y = rand() % graphics.bounds.h;
    shape.r = (rand() % 10) + 3;
    shape.dx = float(rand() % 255) / 128.0f;
    shape.dy = float(rand() % 255) / 128.0f;
    shape.pen = graphics.create_pen(rand() % 255, rand() % 255, rand() % 255);
    shapes.push_back(shape);
  }

  uint8_t bg = graphics.create_pen(120, 40, 60);

  while(true) {
    graphics.set_pen(bg);
    graphics.clear();

    for(auto &shape : shapes) {
      shape.x += shape.dx;
      shape.y += shape.dy;
      if(shape.x < 0) shape.dx *= -1;
      if(shape.x >= graphics.bounds.w) shape.dx *= -1;
      if(shape.y < 0) shape.dy *= -1;
      if(shape.y >= graphics.bounds.h) shape.dy *= -1;

      graphics.set_pen(shape.pen);
      graphics.circle(Point(shape.x, shape.y), shape.r);
    }

    // update screen
    st7735.update(&graphics);
  }

  return 0;
}