Quick math question / Coding question?

[Guest GroundHOG-2010]

Math question

If i was to burn upwards in space and get to a speed of 10 m.s upwards and then burn side ways and have sideways velocity of 10 m.s, how would I work out the vector of the two velocitys put together and the speed? And what would be the easiest way of calcualting this?

(I am coding a game which need this. Its 2d (as I can\'t do anything else as perfect as I want).

Forgot to mention: The problem with that is I am using 2 floats for direction, one float for the velocity direction and one for where the space ship is pointing at that very moment, so just adding vectors won\'t work

[Awaras]

Math question

If i was to burn upwards in space and get to a speed of 10 m.s upwards and then burn side ways and have sideways velocity of 10 m.s, how would I work out the vector of the two velocitys put together and the speed? And what would be the easiest way of calcualting this?

(I am coding a game which need this. Its 2d (as I can\'t do anything else as perfect as I want).

Pythagoras is your friend...

http://en.wikipedia.org/wiki/Pythagorean_theorem

http://en.wikipedia.org/wiki/Vector_addition#Addition_and_subtraction

[Guest GroundHOG-2010]

Pythagoras is your friend...

http://en.wikipedia.org/wiki/Pythagorean_theorem

http://en.wikipedia.org/wiki/Vector_addition#Addition_and_subtraction

Ok... I need to get some sleep someday.

[r4m0n]

You just add the vectors, the combined velocity is the magnitude of the resulting vector. In your example:

(10, 0) + (0, 10) = (10, 10)

the vector magnitude you can find out with Pythagoras\' theorem, which is:

v = sqrt(x^2 + y^2), or in the example ~= 14.14

Ninja\'ed, but here it is anyway

[Guest GroundHOG-2010]

You just add the vectors, the combined velocity is the magnitude of the resulting vector. In your example:

(10, 0) + (0, 10) = (10, 10)

the vector magnitude you can find out with Pythagoras\' theorem, which is:

v = sqrt(x^2 + y^2), or in the example ~= 14.14

Ninja\'ed, but here it is anyway

The problem with that is I am using 2 floats for direction, one float for the velocity direction and one for where the space ship is pointing at that very moment... So it wouldn\'t work.

[r4m0n]

The problem with that is I am using 2 floats for direction, one float for the velocity direction and one for where the space ship is pointing at that very moment... So it wouldn\'t work.

You should work either with Cartesian coordinates or Polar coordinates, looks like you are trying to work with both.

If you want the ship to move 'forward' accounting for her rotation, you will need to rotate the velocity vector you are adding.

Yes, things are starting to look ugly, welcome to game programming

[Guest GroundHOG-2010]

You should work either with Cartesian coordinates or Polar coordinates, looks like you are trying to work with both.

If you want the ship to move 'forward' accounting for her rotation, you will need to rotate the velocity vector you are adding.

Yes, things are starting to look ugly, welcome to game programming

I have been programming for 2 years now. But I want to do proper physics for this... and this is what that involves.

crap I just realised that I can\'t use Pythagoras\' theorem because I am not using right angle triangles (or cartesian coordinates or polar coordinates). See you when I figure this out... in a month.

[Phoxtane]

Try projectile physics?

[NIN3]

Pythagoras........ why do you follow me home now? I though I was done you when I got home from school......

[Guest GroundHOG-2010]

Pythagoras........ why do you follow me home now? I though I was done you when I got home from school......

Once again, its not using add the vectors or Pythagoras because they require right angle triangles, which is... not what I need. Thanks for trying though.