Timing

[Cleves]

A quick question about timing:

Code: Select all

u32 lastTime = device->getTimer()->getTime();

if(device->getTimer()->getTime() > lastTime + 2000) 
 DoSomething();

If I get it right, after 2 seconds DoSomething will happen. But it doen't work. Any ideas?

Thanks in advance.

[hybrid]

No, it is not! It just checks whether between the two statements two seconds have elapsed (by some miracle or time warp ) If not (and this will be true in about 101% of all tries) the statement is just not executed. Use sleep/Sleep to stop your app for the specified amount of time.
Maybe a sleep method would be a good extension for the Timer interface?

[Acki]

Or use this:

Code: Select all

static u32 lastTime = device->getTimer()->getTime();

if(device->getTimer()->getTime() > lastTime + 2000) 
 DoSomething();

[CuteAlien]

Making it only static won't make a difference. Additionally you need to call the if statement regularly (for example in main loop). And in most cases it's better to use member variables than static's.

Using sleep is the best way to go if you don't want to do anything in your application within that time.

[Cleves]

Thing is that I do want to do something in this 2 seconds. The game will continue going, but after 2 seconds my energy will rise a little bit.

[Andreas]

You could try something like this:

First define a variable in the constructor of your class:

Code: Select all

u32 energyTime = 0;

Then check the time elapsed in the game's main loop;

Code: Select all

u32 curretTime = device->getTimer()->getTime();

if (currentTime - energyTime > 2000) {
    energyTime = device->getTimer()->getTimer();
    // raise the energy bar
    .....
}

[Cleves]

Yep, that did the trick. Thanks

[hybrid]

I think the usual way is to set a destination time (i.e. now+2000) and check the current time for being larger or equal to the destination time. This removes the additional expression in each comparison. But otherwise yes, do it within the main loop and you'll come to something like that.

[tjuhzj]

You have to check if now is destination time in Main Loop,
because irrlicht doen't provide OnTimer() event!

You could try something like this:

First define a variable in the constructor of your class:

Code: Select all

u32 energyTime = 0;

Then check the time elapsed in the game's main loop;

Code: Select all

u32 curretTime = device->getTimer()->getTime();

if (currentTime - energyTime > 2000) {
    energyTime = device->getTimer()->getTimer();
    // raise the energy bar
    .....
}

________
JUSTIN BIEBER FAN