How do I create a button that will create/destroy a sprite

  • I'm new to C2, so I apologize if this question has a very simple, obvious answer I should have found in my searching and tutorial-reading!

    I'm trying to make a create/destroy button which will create an object if there is no objectsprite on the screen and destroy the object if the objectsprite is onscreen.

    Basically a show/hide button; click once and the object appears, click again and it disappears, click a third time and it appears again, etc.

    Here's what I've tried:

    To create the object:

    ------------------------------------------

    On mouse click on buttonsprite

    AND

    buttonsprite variable1=0 (which is default value)

    System create objectsprite

    buttonsprite add 1 to variable1

    -----------------------------------------------

    To destroy the object:

    ------------------------------------------------

    On mouse click on buttonsprite

    AND

    buttonsprite variable1=1 (which shows it's been clicked once, so the objectsprite has been created)

    objectsprite destroy

    buttonsprite set variable1 to 0 (ready to create object again on next mouse click)

    -----------------------------------------------------

    In my head this logic should work, but onscreen...nothing happens. Is the button click instantly setting the variable to 1, thus also triggering the destroy event with that initial button click?

    I have searched for a solution to this but either I haven't found it or am too dense to realize the answer is staring in my face. Any suggestions or links to relevant tutorials would be greatly appreciated! Thanks!

  • There are two options to switch the state. First using modulo and second is 'toggle boolean'.

    Assume that:

    state=1 , create an object

    state=0 , destroy it.

  • Thank you for the suggestions! I'm not sure how to use modulo yet; I'll have to read up on that more. With your advice and this tutorial () I managed to get things working the way I wanted. Thanks again!

  • Just a question, Are you doing this switch for only one object in the layout?

    If yes then you don't need a variable for that at all.

    If no, then instead of modulo you can do simply "1-variable" (1-0= 1, 1-1=0 - simple switch), but if you are using an instance variable then Boolean is the nicest option.

    @alextro, there are lot more then two options to switch a state

  • shinkan

    Pardon my lack of experience, just trying to give a quick suggestion. Glad to know there is more handy "switch" to use then I can imagine.

  • I'm doing it for several objects, but each object has its own "toggle" button. Right now what I have is:

    -------------------------------------------------------

    onMouseClick on "buttonsprite"

    system add 1 to variable [local static number]

    subevent:

    system variable > 1

    system set variable to 0

    subevent:

    system variable = 0

    objectsprite destroy

    subevent:

    system variable = 1

    system create objectsprite

    ------------------------------------------------------

    It seems to be working, though I feel like there out to be a more streamlined solution...?

  • ...or....

  • also you can use visibility (visible , invisible)

  • korbaach Ahhh! I'd tried something similar, but was inverting "sprite is onscreen" instead of using "else", which didn't work--now it works! Thank you!

    Related question: if I have two toggle buttons triggering create/destroy for two different sprites, can I keep sprite1 from being created if sprite2 already exists, and vice versa?

    For example:

    sprite1 is created

    sprite2 cannot be created until sprite1 is destroyed

    if sprite2 is then created, sprite1 cannot be re-created until sprite2 is destroyed, etc, etc.

    I haven't quite hit on the right combination to get this working...I can get it to work for one create/destroy round, or for one sprite, but not both sprites for numerous repetitions. Will keep reading and experimenting.

  • There Can Only Be One..... <img src="{SMILIES_PATH}/icon_e_biggrin.gif" alt=":D" title="Very Happy">

    capx:

    http://s000.tinyupload.com/index.php?fi ... 1199932939

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  • Haha!

    That is exactly what I was trying to do. Thank you!

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