eulerToAxis / axisToEuler

[Penguin/Person]

Not too long ago at a bar during IGC, the topic of quaternions came up and I was informed by my enebriated peers that what I was explaining as a quaternion was actually an Axis Angle and a quaternion was something entirely more complex like a double ended 4 dimensional cone with a spherical base (you can see this by how scary the quaternion wiki page looks compared to the axis angle page).

whoa whoa whoa whoa wait a second, theres bars that talk about this stuff? Wow, that would be a miracle for me to go to one of those bars Because for my career (I would say 'when i grow up' but thats childish and I am almost 'grown up') I am planning on being a game programer (very much like Eric "Badspot" Hartman and Ben Garney) and creating games (probably MOGs too) using the TGE or I would either like to become the head of a great gaming industy(im not fully sure wich type yet, either producing or publishing im pretty sure). I would have my company called: New Vision Inc.              Ok getting back on topic, what is IGC?

[Ad Bot]

[BobAndRob]

whoa whoa whoa whoa wait a second, theres bars that talk about this stuff? Wow, that would be a miracle for me to go to one of those bars Because for my career (I would say 'when i grow up' but thats childish and I am almost 'grown up') I am planning on being a game programer (very much like Eric "Badspot" Hartman and Ben Garney) and creating games (probably MOGs too) using the TGE or I would either like to become the head of a great gaming industy(im not fully sure wich type yet, either producing or publishing im pretty sure). I would have my company called: New Vision Inc.              Ok getting back on topic, what is IGC?

LOL

http://www.google.com/#q=igc+game
The second hit buddy.
Google is your friend, use it.

[Tyler66]

Where do you put the script then?

[Destiny/Zack0Wack0]

Where do you put the script then?

If you don't know where to put it, I don't think you need to use it.

[Tyler66]

If you don't know where to put it, I don't think you need to use it.

Infact, sir. I am creating a map and im tired of spawning single loving trees across the map. So this tutorial would be helpfull.

EDIT: Wait.....nvm I think its console :/

Return Of Edit: Wtf.....nope...

[BobAndRob]

Infact, sir. I am creating a map and im tired of spawning single loving trees across the map. So this tutorial would be helpfull.

EDIT: Wait.....nvm I think its console :/

Return Of Edit: Wtf.....nope...

I don't think you need to use it.

Quote for truth.

[Chrono]

Infact, sir. I am creating a map and im tired of spawning single loving trees across the map. So this tutorial would be helpfull.

EDIT: Wait.....nvm I think its console :/

Return Of Edit: Wtf.....nope...

This has nothing to do with spawning trees.
This part: "EDIT: Wait.....nvm I think its console :/"
means you have no idea what you're talking about.

[spartan101]

 
It's helpful thank's!

[Ipquarx]

Code: [Select]

function axisToEuler(%axis)
{
%angleOver2 = getWord(%axis,3) * 0.5;
%angleOver2 = -%angleOver2;
%sinThetaOver2 = mSin(%angleOver2);
%cosThetaOver2 = mCos(%angleOver2);
%q0 = %cosThetaOver2;
%q1 = getWord(%axis,0) * %sinThetaOver2;
%q2 = getWord(%axis,1) * %sinThetaOver2;
%q3 = getWord(%axis,2) * %sinThetaOver2;
%q0q0 = %q0 * %q0;
%q1q2 = %q1 * %q2;
%q0q3 = %q0 * %q3;
%q1q3 = %q1 * %q3;
%q0q2 = %q0 * %q2;
%q2q2 = %q2 * %q2;
%q2q3 = %q2 * %q3;
%q0q1 = %q0 * %q1;
%q3q3 = %q3 * %q3;
%m13 = 2.0 * (%q1q3 - %q0q2);
%m21 = 2.0 * (%q1q2 - %q0q3);
%m22 = 2.0 * %q0q0 - 1.0 + 2.0 * %q2q2;
%m23 = 2.0 * (%q2q3 + %q0q1);
%m33 = 2.0 * %q0q0 - 1.0 + 2.0 * %q3q3;
return mRadToDeg(mAsin(%m23)) SPC mRadToDeg(mAtan(-%m13, %m33)) SPC mRadToDeg(mAtan(-%m21, %m22));
}

[Kalphiter]

-idiot snip-

Go away.

[Ipquarx]

Go away.

calm down, i'm not doing anything wrong, i just posted a oh noes picture under some complicated looking code. harmless.

[Axolotl]

How does the axis angle system work? The Wikipedia article confuses me.

I'm used to euler angles so I'll use the functions.

For you aviation nuts out there, I have figured out the Euler angles for a flying vehicle. Pitch is Euler angle #1, roll is Euler angle #2, and yaw is Euler angle #3.

[Blocki]

How does the axis angle system work? The Wikipedia article is way too complicated to understand the first paragraph

axistoeuler(0.5 0.5 0.5 pi) is 30 -135 -135
existoeuler(0.5 0 0 pi) is 0 -180 -180
What
How does the return of these functions work

[Blocki]

Ok it seems to be that when rotation around ONE axis the rotation is x y z f, where i.e. x*f is the angle around the x axis and y and z are 0.
This works as long as you rotate around one axis.
When you rotate around multiple axis, it's like
wat
????

[Blocki]

Ok I think I kinda figured it out...
xyz defines a vector3 and the object is then rotated f degrees around the vector