[gameprogrammer] Re: argh, math!

OK, my maths isn't great, but they will be overlapping if the lines
intersect, so by putting two of the equations equal to each other and
solving you can see if there is a point of intersection.

That sounds a bit too simple, so maybe I have mis-interpretted the problem.

Or thinking about it, could you not use vectors? If you had the vector
equations you could use:

a.b = |a||b|cos(x)

But again, it seems too simple. Is it that hard to solve a equation 12
times.

Rob

Rob
----- Original Message ----- 
From: "Alan Wolfe" <atrix2@xxxxxxx>
To: <gameprogrammer@xxxxxxxxxxxxx>
Sent: Saturday, May 29, 2004 8:52 PM
Subject: [gameprogrammer] argh, math!


> hey everyone
> I have a math problem im trying to solve for my game and am having
difficulty :P
>
> i have a "box" defined by 6 planes in the form of: Ax+By+Cz+D=0, where
A,B,C and D are known constants for each equation.
>
> the box doesnt have to have corners at right angles, but it's assumed to
be concave.
>
> what im trying to do is take 2 of these "boxes" and see if they overlap at
all.
>
> so basicly from what i can tell i have 12 plane equations and what i am
trying to do is find if there are any sets of X,Y,Z which satisfy all 12
equations.
>
> I asked around how to solve systems of inequalities but people keep saying
"graph it", which doesnt help me any :P
>
> Does anyone know how to do this? I'm starting to think that there is no
solution ::cry:: hehe
>
>
>
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