Character Walking causes Alice to Crash ?

Hi,

We are trying to figure out how to make our Alice Characters walk by being controlled by the Keyboard - While key is pressed Event.

Everybody in class is having the same issue.

When you run the program and press the key, the character walks fine, but when you release the key - Alice Crashes.

Are we doing this correctly or is there a better way to control the prebuild walk methods via keyboard interactions?

Thanks for your help.

[x2495iiii]

That's an issue experienced by a choice few, apparently, as I personally experience it, but others (Dameria, if I'm not mistaken) don't.

The problem comes from interrupting movements inside the "While a key is pressed" event. For some reason, inside that event it triggers an error. If you use a middleman, like a boolean variable that's set to true when the key is pressed, then false when it's released, it should work.

Yes, I just replicated the problem on my home computer as well as my school computers. Strange bug.

So let me get this right, are you suggesting to create a boolean variable instead of using the "Create Event" when world starts - When up key is pressed or adding it somehow to the start of the program? Sorry, not sure I quite understand.

thanks

[Dameria]

Yea I don't get this error when I run programs using the event, however what would happen on mine is that the character would just stop walking exactly where he is midstep without putting his foot down, and when you press it again it would just carry on from there.

[x2495iiii]

Here is what I'm suggesting.

Keep your movement events (the While the key is pressed events can stay), but instead of having movement commands in the Begin, During, and End parts of the event, make a boolean variable set itself to true in Begin and to false in End. Then, use a method of your choice (I prefer using the event "When something becomes true", which can be made by right-click-changing a "While something is true" event, to call a method which contains a while loop that executes the desired motion) to connect the boolean variable's being true to the character's motion. Same effect, no glitch (at least not for me).

[dragnet]

Thanks for this 'bug' report. Helped me stop my crashing woes. I can confirm this fix stops Alice from crashing.

[davidghemer]

I was also having this problem with the built-in methods that come with the person builder classes.
Here's a link to a tutorial that describes how to program characters using the built-in walking animations to walk while a key is pressed.

http://programminginalice.wordpress....-in-alice-2-2/

It pretty much uses the method suggested by x2495iiii, using a finite state machine to control the walking animation, and changing the state of the FSM at the beginning and end of the while key is pressed event.