Unit 5 Activity & Turtle - Is there an id for the turtle

[wendy_beuglas]

One of my students is trying to hover over a finish button in his app with a turtle. He would like it to change screens when the turtle hovers over this button. We are unable to find any code, that had been learned, that would allow this to occur. Any suggestions?

[frank_w_lee]

I know one of the events is if you have the mouse hover over the element, but as far as I know, there’s no event for when the turtle is in the same position as an element.

Basically you’re looking to do “collision detection”, something not built into App Lab. There’s been a few posts about it in the past. Looks like there might be a way that requires a bit more coding:

Collision Detection In App Lab

I’ve put together a tutorial for making a simple arcade game in App Lab. It includes a part about creating simple collision detection function. Make an Arcade Game in Code.org App Lab

Collision detection of multiple objects in app lab

Hi, I am attempting to set up collision detection in a maze environment so that a ball can pass through the maze and properly collide with the walls… many of my students are interested in this sort of thing so I have been trying to get it to work myself… Here is a link to the code: https://studio.code.org/projects/applab/mV1iXG1eshIZtb27dHT9Xw any thoughts? I know game lab has built in collision detection, but many of my students are uncomfortable changing platforms when it comes to preparing…

Why does App Lab not have collision detection?

Will Code.org implement a collision detector for CSP’s App Lab? I have a lot of students wanting to incorporate this into their Create Task but are having difficulty implementing. Doug McNally has made a great tutorial video, found here but I am also teaching CS Discoveries and coincidentally we are on Unit 3 Stage 12 (Collision Detection). For this section, it’s very intuitive and easy to detect collisions, but in App Lab, it’s no longer easy. Is there a reason for this I’m completely missing? …

’15 -’16 General Discussion for Lesson 5.18

Hey Katie, Currently App Lab doesn’t easily support this kind of interaction. There’s no command like turtleIsTounching(color) which a student could use within an if-statement to prevent a turtle from moving through walls, change the score, etc. There are ways you could do this by manually performing collision detection (i.e. keeping track of the locations of all walls and the turtle and comparing to make sure the turtle isn’t touching one), but depending on the programming ability of the stude…

[milannikulin]

I am sorry for typing this very late, I have just made a Code.org forums account using my personal account, this is my first post on these forums.

Talking about how you want to detect if a turtle is over a button, the only way I did that was here: App Lab - Code.org

This is a way I detected the turtle going over something, you can list your button x and y values and remove the text label as I used that to see where the turtle has to be to get detected! you can add a trigger to the code to change screen when the turtle gets detected!

Happy to help if you see this command But you probably won’t cause it was made in 2025…