Help for student Unit 3L18

[crosado]

Student would like to have his character not go off screen when the game is played - how would he achieve this?

var character = createSprite(200, 200);
character.setAnimation(“flyer”);
var coin = createSprite(randomNumber(0, 400), randomNumber(0, 400));
coin.setAnimation(“coin”);
var e = createSprite(200, 200);
e.setAnimation(“e”);
e.scale = 0.5;
e.rotationSpeed = 3;

function draw() {
background(“skyblue”);

// Simulating Gravity
character.velocityY = character.velocityY + 0.1;

// update sprites
//it’s right here
if(keyWentDown(“up”)){
character.velocityY = -5;
}
if (character.velocityX >= -5) {
if (keyDown(“left”)) {
character.velocityX = character.velocityX + -.5;
}
}
if ((character.velocityX) <= 5) {
if (keyDown(“right”)) {
character.velocityX = character.velocityX + .5;
}
}
if (character.isTouching(coin)) {
coin.x = randomNumber(0, 400);
coin.y = randomNumber(0, 400);
}
if (coin.isTouching(e)) {
coin.x = randomNumber(0, 400);
coin.y = randomNumber(0, 400);
}

character.bounceOff(e);
rect(0, 0, 400, 10);
rect(0, 0, 10, 400);
rect(0, 400, 400, -10);
rect(400, 400, -10, -400);
drawSprites();
}
**https://studio.code.org/s/csd3-2019/stage/18/puzzle/16?section_id=2284631&user_id=53149456
What I expect to happen: character not go off screen
What actually happens: character disppears off screen

[mwood]

@crosado,

Good to see you again. It’s a bit hard to fully troubleshoot the program without the link to the shared project. Your link unfortunately just takes me to my own program on that level. You could have the student remix and then share the project to get the link, however, I just helped another teacher with almost the exact same issue on almost the same level, so my answer from earlier today may help.

Here’s a link to that answer. Let us know if that helps!

Help with Step 13 or Lesson 17

What is happening is that he can leave the screen (top, bottom, left or right side). There are a number of ways to fix that. In my experience, the easiest is by using two blocks in the sprites toolbox (red/pink blocks). One is called “create edge sprites”. You can put that one at the very top (or near the top) of your code (not inside the draw loop). The other one needs to go in the draw loop somewhere. It is the “sprite.bounceOff” block. change the word sprite to character in your progra…

Mike

[mwood]

If you don’t see the two blocks mentioned in the reply above, you may need to have the student remix the project and that will open all of the sprite blocks.

Mike

[crosado]

Thanks a mil, this helped alot