最后一个场景出现黑色背景

Question

I have a problem, once the hot air balloon reaches the ground, a black background appears.

// a switch case based on state with appropriate calls
switch (state) {
// scene 1
case 1:     
    drawBackground1(); // the first background to appear
    drawSlogan1(); // display the first slogan
    break;
// scene 2
case 2:     
    drawBackground2(); // the second background to appear
    drawSlogan2(); // display the second slogan
    break;
// scene 3
case 3:     
    drawBackground1(); // the third background to appear
    drawSlogan3(); // display the last slogan
    break;
}

I am showing this code here is because this is the only code I have changed, that made the black background appear.

Click here to see the full code

Answer 1

When the balloon reaches the final position, then state is 0. You have to draw the background if state == 0 , too:

switch (state) {
case 0: 
    drawBackground1(); // the third background to appear
    break;
case 1:     
    drawBackground1(); // the first background to appear
    drawSlogan1(); // display the first slogan
    break;
case 2:     
    drawBackground2(); // the second background to appear
    drawSlogan2(); // display the second slogan
    break;
case 3:     
    drawBackground1(); // the third background to appear
    drawSlogan3(); // display the last slogan
    break;
}