11 replies to this topic

[ninja_x]

Edit: Removed the script. I tried using it today and didn't work properly, which is pretty bad considering how long it's been up here. I didn't feel like debugging my approach since the post below has a completely good solution, which I'd recommend using instead.

Edited by ninja_x, 23 May 2012 - 04:49 PM.

[Mnementh]

*cough*

/*
**  usage:
**	  diff = angle_difference(angle1,angle2);
**
**  given:
**	  angle1	first direction in degrees, real
**	  angle2	second direction in degrees, real
**
**  returns:
**	  difference of the given angles in degrees, -180 to 180
**
**  GMLscripts.com
*/
{
	return ((((argument0 - argument1) mod 360) + 540) mod 360) - 180;
}

I applaud you for the effort, however.

[ninja_x]

...oh.

They even had the same name for the function.

But they did it in 1 line.

Well, I suppose there's some moral to this story, to always look for general scripts on GMLscripts.com before making them myself. So thanks for pointing that out.
I wonder if this makes my homing scripts obsolete as well...

[Mnementh]

Yea... If it's any consolation, I still have no idea how their script works, while yours is easy to understand.

Edited by Mnementh, 15 July 2008 - 06:47 PM.

[BK-TN]

This works, thanks alot!

[yanai21]

all angle diffrent is not relly fast =\ i make one :

return (argument0-argument1)-round((argument0-argument1)/360)*360;

its only 5 operators\functions i make and i was see it in different engine and like that 0.0 i only publish is in my engine
Ray without DLL you can make RAY in slower computer 60\60 fps its what you should..

[LSnK]

all angle diffrent is not relly fast =\ i make one :

return (argument0-argument1)-round((argument0-argument1)/360)*360;

its only 5 operators\functions i make and i was see it in different engine and like that 0.0 i only publish is in my engine
Ray without DLL you can make RAY in slower computer 60\60 fps its what you should..

Your code is 1.45 times slower than the GMLscripts version.

[DanRedux]

Does his script work correctly?

This would be more efficient..

return ( argument0 - argument1 ) - ( argument0 - argument1 ) div 360

[slayer 64]

Does his script work correctly?
This would be more efficient..
return ( argument0 - argument1 ) - ( argument0 - argument1 ) div 360

you could not use any code at all, that would be super efficient and it would do the same thing, not work.

[DanRedux]

Haha! Oh, slayer. <3

[icuurd12b42]

...oh.

They even had the same name for the function.

But they did it in 1 line.

Well, I suppose there's some moral to this story, to always look for general scripts on GMLscripts.com before making them myself. So thanks for pointing that out.
I wonder if this makes my homing scripts obsolete as well...

Yeah, I duped the one they call lerp... In my defence, I had no idea the method I was implementing was called lerp
Oh and I added a post in you turn script

[sneaky666]

If you want the difference to be between 0 and 180, then see this:

c_time = current_time;
for(i=-1000;i<=1000;i+=1) {
    for(j=-1000;j<=1000;j+=1) {
        val = abs(((((i - j) mod 360) + 540) mod 360) - 180);
    }
}
show_message((current_time-c_time)/1000); // time was 7.29 seconds
c_time = current_time;
for(i=-1000;i<=1000;i+=1) {
    for(j=-1000;j<=1000;j+=1) {
        val = abs((i + 180 - j) mod 360 - 180);
    }
}
show_message((current_time-c_time)/1000); // time was 6.49 seconds

So the bottom one was faster. If you want it to be from -180 to 180, then I think you can just remove the abs() from either.

Edited by sneaky666, 30 December 2011 - 08:44 PM.