detect compass position

[poohpooh]

trying to work out what way im facing
would like to print out what way im facing. but its not working like it should

here is a picture explaining the positions

would also like to print NE ES an so on
just havent worked out the basic must be something simple

http://i.imgur.com/V9G1Bd9.png

		if (forward.x < -1.0f && forward.x < 1.0f && right.x > 0.0f)
			return "North";
		else if (forward.x > 0.0f && right.x < 1.0f && right.x > -1.0f)
			return "East";
		else if (forward.x < 1.0f && forward.x > -1.0f && right.x < 0.0f)
			return "South";
		else if (forward.x < 0.0f && right.x > -1.0f && right.x < 1.0f)
			return "West";
		else
			return "";

[MiiNiPaa]

but its not working like it should

What the problem exactly is?
I see problem with first condition, with forward.x < -1.0f

I suggest to convert your cooeds into polar angle and work with it. It will be easier to implement other directions that way

[poohpooh]

it dont seem to print out all the directions, north never got printed.

polar angle??

[MiiNiPaa]

polar angle??

http://en.wikipedia.org/wiki/Polar_coordinate_system#Position_and_navigation

north never got printed.

I posted the problem:
forward.x < -1.0f && forward.x < 1.0f Do you see it?

[AbstractionAnon]

Your if statements are not going to do what you think they're going to do:

forward.x < -1.0f && forward.x < 1.0f 

The second condition is irrelevant. If x < -1, your if statement is fine. Both conditions will evaluate true. However, there is no point to the second condition. If you're trying to catch x > 0 and < 1, that second condition will never execute because any positive number will cause the first condition to fail.

[poohpooh]

oops yeah i see that thanks.
i will look into polar seems confusing

lol now im only getting north, south, west

[AbstractionAnon]

Just think of it as an angle from 0 - 360.

[poohpooh]

i was never good at maths

[AbstractionAnon]

Simply treat it like a compass.

0 degres is North.
90 degrees is East.
180 degrees is South.
270 degrees is West.

For four directions, you want to test +/- 45 degrees.
e.g. If a heading is > 315 (360-45) degrees and < 45 degees, then that is a "northerly" direction.

If you want to use NE, SE, SW and NW, then you want to break your compass into 8 sectors. Hint: +/- 22.5 degrees