[robotic]

I'm working on a small opengl game that is controlled via the keyboard.
I can move my object around the screen right now using the w,s,a, and d keys. However, I can't get it to recognize to keys pressed at the same time... it only responds to the first one pressed.

Here's my code:

<BLOCKQUOTE><font size="1"face="Geneva, Verdana, Arial">code:</font><HR><pre><font size=1 face=courier>
- (<font color = green>void</font>)keyDown: (NSEvent *)aEvent
{
<font color = green>if</font>([[aEvent characters] characterAtIndex:<font color = blue>0</font>]=='w' &#0124;&#0124;
[[aEvent characters] characterAtIndex:<font color = blue>1</font>]=='w')
{[m_triangle increaseVel];
}

<font color = green>if</font>([[aEvent characters] characterAtIndex:<font color = blue>0</font>]=='s' &#0124;&#0124;
[[aEvent characters] characterAtIndex:<font color = blue>1</font>]=='s')
{[m_triangle decreaseVel];
}

<font color = green>if</font>([[aEvent characters] characterAtIndex:<font color = blue>0</font>]=='a' &#0124;&#0124;
[[aEvent characters] characterAtIndex:<font color = blue>1</font>]=='a')
{[m_triangle rotateL];
}

<font color = green>if</font>([[aEvent characters] characterAtIndex:<font color = blue>0</font>]=='d' &#0124;&#0124;
[[aEvent characters] characterAtIndex:<font color = blue>1</font>]=='d')
{[m_triangle rotateR];
}
}
</font>[/code]

what am I doing wrong?

-robotic

[lindberg]

The [event characters] string in all likelyhood has all of the characters pressed in it. You need to iterate through all the characters in the string, processing each one. This is why NSEvent has an NSString that can contain multiple characters and not just a single unichar variable :-)

[robotic]

Thanks!

So how would I pull the characters out of the string that NSEvent passes? Hmmmm.... time to delve back into the documentation


-robotic

[lindberg]

<BLOCKQUOTE><font size="1"face="Geneva, Verdana, Arial">code:</font><HR><pre><font size=1 face=courier>
- (<font color = green>void</font>)keyDownNSEvent *)anEvent
{
NSString *chars = [anEvent characters];
<font color = green>int</font> i, length = [chars length];

<font color = green>for</font> (i=<font color = blue>0</font>; i&lt;length; i++)
{
<font color = green>switch</font>([chars characterAtIndex:i])
{
<font color = green>case</font> 's': ...
}
}
}
</font>[/code]

[robotic]

Thanks! I'll go try that out!


-robotic