Play OLED, u8g2 animation, increasing numbers, random triangles, etc

1. Dynamic digital display

Logically speaking , Is to draw a solid square , Occlude the last drawn content , Then draw this time .

// Animated digital effects 
void dynamicNum(int x, int y, int num)
{
  int i;
  for (i = 0; i < num; i++)
  {
    u8g2.setDrawColor(0);
    u8g2.drawBox(x, 10, 60, 60);
    u8g2.setCursor(x, y);
    u8g2.setDrawColor(1);
    u8g2.print(i);
    u8g2.drawBox(0, 63 - 3, (127 / 100) * i, 3);
    u8g2.sendBuffer();
    delay(2);
  }
}

2. The drawing of triangle

This algorithm is to draw an equilateral triangle , It was like this , But I added pseudo-random numbers , So it becomes a flying triangle

random(int i) function , Used to generate from 0 To i A number of

void animateG(int x, int y, int r)
{

  int rd1 = random(2);
  int rd2 = random(3);
  int rd3 = random(3);
  int rd4 = random(3);
  int rd5 = random(3);
  int rd6 = random(2);
  u8g2.drawLine(x * rd1, (y - r * 2 / 3) * rd2, (x + r / sqrt(3)) * rd3, (y + r / 3) * rd4);
  u8g2.drawLine((x + r / sqrt(3)) * rd3, (y + r / 3) * rd4, (x - r / sqrt(3)) * rd5, (y + r / 3) * rd6);
  u8g2.drawLine((x - r / sqrt(3)) * rd5, (y + r / 3) * rd6, x * rd1, (y - r * 2 / 3) * rd2);
}

3. Screen closing effect

Similar to the effect of cross closing after power failure of the picture tube of the old TV , I want to imitate this .

void close()
{
  u8g2.clear();
  u8g2.drawBox(0, 63 / 2 - 3, 127, 6);
  u8g2.drawBox(127 / 2 - 3, 0, 6, 63);
  u8g2.sendBuffer();
  delay(3);
  u8g2.clear();
  u8g2.drawBox(0, 63 / 2 - 2, 127, 4);
  u8g2.drawBox(127 / 2 - 2, 0, 4, 63);
  u8g2.sendBuffer();
  delay(3);
  u8g2.clear();
  u8g2.drawBox(0, 63 / 2 - 1, 127, 2);
  u8g2.drawBox(127 / 2 - 1, 0, 2, 63);
  u8g2.sendBuffer();
  delay(3);
  u8g2.clear();
}