# Bouncing Ball

import LCD
from time import sleep_ms

Navy = LCD.RGB(0,0,10)
Yellow = LCD.RGB(150,150,0)
Grey = LCD.RGB(50,50,50)

LCD.Init()
LCD.Clear(Navy)

Xmin = 10
Xmax = 470
Ymin = 10
Ymax = 310
LCD.Box(Xmin,Ymin,Xmax,Ymax,Yellow)

x = 10
y = 300

dx = 10
dy = 0

dt = 0.1

zx = x
zy = y

# ball radius
r = 5

while(1):
    ddy = -9.8
    ddx = 0
    
    dy += ddy*dt
    dx += ddx*dt
    
    y += dy*dt
    x += dx*dt
    
    if(x+r > Xmax):
        dx = -abs(dx)
    if(x-r < Xmin):
        dx = abs(dx)
    if(y+r > Ymax):
        dy = -abs(dy)
    if(y-r < Ymin):
        dy = abs(dy)

    LCD.Circle(zx, 320-zy, r, Navy)
    zx = x
    zy = y
    LCD.Circle(x, 320-y, r, Yellow)
    sleep_ms(10)