use ["canvas", "math", "std"]
ball = {"x": 400, "y": 400, "sx": 5.0, "sy": 5.0}
max_speed = 25
down = false
x = 0.00
y = 0.00
x2 = 0.00
y2 = 0.00
rad = 0
def vlen(x1, y1, x2, y2) = sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)) // вычесление длины вектора

canvas = showcanvas()
setOnTouchEvent(::onTouch)
canvas.setTextSize(25)

while (true) {
  update()
  render()
  repaint()
  sleep(33) // задержка перед следующим рендерингом кадра
}

def render() {
  canvas.drawColor(#ff343434)
  canvas.setColor(#ffff0076)
  canvas.drawCircle(ball.x, ball.y, 30)
  if (down) {
    canvas.setColor(#ff0097f0)
    canvas.setStyle(Style.STROKE)
    canvas.setStrokeWidth(5)
    canvas.drawCircle(x, y, 65)
    canvas.drawCircle(x, y, 130)
    canvas.setStyle(Style.FILL)
    canvas.drawCircle(x2, y2, 60)
    canvas.drawLine(x, y, x2, y2)
  }
  canvas.setColor(#ffaa7500)
  canvas.drawText("x1="+x+",y1="+y+",x2="+x2+",y2="+y2, 0,50)
  canvas.drawText("Stick: " + cos(rad)+","+sin(rad), 0, 75)
  canvas.drawText("sp: " + ball.sx +","+ball.sy, 0, 100)
  canvas.drawText("rad: " + rad, 0, 125)
}
def update() {
  if (down) {
    rad = atan2(y2 - y , x2 - x)
    len = sqrt((x2-x)*(x2-x)+(y2-y)*(y2-y))
    if (len > 130) len = 130
    dx = len * max_speed / 130
    ball.sx = cos(rad) * dx
    ball.sy = sin(rad) * dx
  }
  ball.sx *= 0.9 // Замедление
  ball.sy *= 0.9 // ..
  ball.x += ball.sx
  ball.y += ball.sy
}

def onTouch(e) { // Обработка тача
  if (e.action == Action.DOWN) {
    down = true
    x = e.x
    y = e.y
    х2 = e.x
    y2 = e.y
  }
  if (e.action == Action.MOVE) {
    x2 = e.x
    y2 = e.y
  }
  if (e.action == Action.UP)
    down = false
}