moveing a gui element (my setup should work!?)

[3DModelerMan]

Hi I have a setup that should scroll my splash screen to the right, but it does'nt, here's my code that should move the splash screen

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while ( trans_to_menu == true )
    {
     background->move( position2d<s32>(+10,0) );
    }

could someone tell me what I'm doing wrong?.
Thanks.

[nmn]

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     background->move( position2d<s32>(+10,0) );

It's not an Irrlicht related problem. Let me explain.

When C++ gets up to +10, it calculates 0+10. (I believe.) Positive 10, in other words.(So + has no effect.) It doesn't add to what you already have, as the Irrlicht documentation clearly states that parameter is "absoluteMovement" in this case, which though can mean multiple things, also means that there's no way it's relative to your current position.

To add to what you currently have is relatively easy though.

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position2d<s32> bgpos = background->getAbsolutePosition().UpperLeftCorner;
background->move( position2d<s32>(bgpos.X+10,bgpos.Y) );

I haven't tested it, so it's likely to have a problem of SOME sort, but that should make things move.

[CuteAlien]

The problem looks rather like an endless loop to me.

[nmn]

The problem looks rather like an endless loop to me.

Oh, that's probably also a problem Didn't even notice.
Use an if instead if your in a loop, or just make an entire Irrlicht loop there.

[3DModelerMan]

Well the endless loop is there so that it scrolls out the side of the screen, and later I set my variable to false, so technically it's not an endless loop.

[zeno60]

What do you mean later you set it to false?

int pos = 0;
bool test = true;

while(test)
{
pos++;
}

test = false;

This loop will process forever. You will have to add an update function or test within the loop when to set test to false to break out of it.

[rogerborg]

If you've posted psuedocode, then you're just wasting your own time.

[Ion Dune]

means that there's no way it's relative to your current position.

Negative!

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00451         virtual void move(core::position2d<s32> absoluteMovement)
00452         {
00453                 setRelativePosition(DesiredRect + absoluteMovement);
00454         }

You're mixing up Position and Movement.

The problem looks rather like an endless loop to me.

This is more likely.

[B@z]

Hi I have a setup that should scroll my splash screen to the right, but it does'nt, here's my code that should move the splash screen

Code: Select all

while ( trans_to_menu == true )
    {
     background->move( position2d<s32>(+10,0) );
    }

could someone tell me what I'm doing wrong?.
Thanks.

please forget that while loops...
its an endless loop, but even if it isn't, it won't work either.

you know, it isn't multitask rendering.
so, you have to call the render function (smgr->drawAll(), guienv->drawAll() and so on)
but if you make while loops the render WON'T RUN!!!
for example you wanna move something from left to right

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x = 0;
while (x < 640)
{
x++;
}
.....
render()

what will you get?
the thing suddenly goes to right. same as x = 640, but more slow...
so, forget the while, when you wanna move something.

[randomMesh]

I told you in your other thread to get used to loops before trying to code anything in Irrlicht. This is essential!

[3DModelerMan]

When I put a while loop inside my main loop nothing will work, but if I put it above everything works fine.

[Ion Dune]

...

Exactly?

You should have one while loop:

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while (device->run())
{
if (something) dosomething();
if (somethingelse) dosomethingelse();

if ( background->getAbsolutePosition().LowerRightCorner.X < 1000 )
background->move(position2di<s32>(10,0));

driver->beginScene(...)
smgr->drawAll();
driver->endScene();
}

[3DModelerMan]

Well my menu scrolling problem is solved. But if I was going to have a statement that requires a while loop to, like, move my character, such as this psuedocode

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 while arrow key is down, move the character

would I put it as an "if" inside my main game loop, or as while loop somewhere else?.

[stevend]

your description is pretty obscure

input from keyboard, mouse, GUI buttons, etc, should all be done in the event receiver

now if you had a property that was decided in a while loop then it could work, for example,

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while (device->run())

or if you reaaally wanted to , when the user presses a key, set a flag accessable by your entrypoint, like this:

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while (device->run()) 
{

if (MYFLAGFORLEFTKEYISDOWN)
     mycharacter->moveleft();

draw stuff

}

but why would you want to do this?

[3DModelerMan]

No, I mean where should I put another while loop when it's necessary.