Recent content by deluksic

I went around it by making few checks ;) now it works :D yes and i am accepting the whole circle, actually it is usefull to me as I'm making a game where i need arcs AND circles, now i have both in one! awesome!

Just curious, what happens when v1=-v2? by adding those two i get v3(0,0)

Hmm, interesting idea, i'll give it a try because lines give me problems when x's of vectors are the same then I am dividing by 0 :mad:

Thank you very much, yes, this is what i was looking for :D (never would've tought of the origin.. :redface:)

Ok, trig would do, but can't you test x and y values of vectors and the point? I tried now drawing lines horizontally and vertically in the tips of both vectors. That would give me something to start with, now i need to test which lines outline the surface i need... Oh, and i need this for a...

So, i have a point in the coordinate system, and an arc defined by two vectors of equal length starting in the same point. The arc is always smaller than 180. How would i check if the point is on the arc? (the point is always on the circle, just need to check if it is in between these two...

soo as the title says, i need formula for force acting on a plate that is moving trough fluid, in my case air... need it for rocket simulation because of its flat stabilizers... i thought like this: a flat plate is moving in any direction (yeah that complicates things... but keep it...

thanks... this is just what i need!

thanks! well not only for that but also for friction and other parts of simulation... actually i have a script that adds a force on a body which is determined by x,y(position where the force is applyed) direction and magitude... after one step of simulation the computer calculate new...

hmm i have mistake in my expression instead of "force" i meant impulse and impulse in both cases is the same... but anyways u do get extra KE right? if that's right then it actually does matter where do you apply the impulse, and linear velocity does change if u change the position of impulse...

guys u haven't answered my q... if force is applying in center of mass then kinetic energy is equal to (mv2)/2, and if it is away from center of mass then kinetic energy is equal to (Iw2)/2 + (mv2)/2 and if in both cases linear velocity is the same then u get extra energy...

but if impulse (F*t) give u some energy (does it depend on mass?), it has to be converted into CM velocity and rotational velocity, so velocity of CM does depend on where u apply that impulse. **didnt saw the last reply... so it is true that it does depend on where is force being applyed? CM is...

I've just watched this vid about rotations and torque: http://ocw.mit.edu/courses/physics/8-01-physics-i-classical-mechanics-fall-1999/video-lectures/lecture-21/ and they say that if u hit or pull something for a corner for example.. it will have the same speed like if u hit it in center...

ok! I am glad u like it! :D

yes if ur interested u can download my first test of it to see what it looks like :D here is my download: https://sites.google.com/site/deluksicgames/contact-us