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CaptainBlack · #8 January 19th, 2008, 09:11 AM

Quote:

Originally Posted by jacksoncapper

Thankyou again for taking your time to reply to my question.

I am having real difficulties in implementing this. Please if you could spend a moment on this simple problem and tell me where I'm going wrong? Say I have these two simple line segments:

Line segment 1 defined by points a( -6, 0, 0 ), and b( 4, 0, 0 ) and
Line segment 2 defined by points c( -1, -5, 0 ), and d( -1, 5, 0 ) with the origin o( 0, 0, 0 ).

Here the equations are:

$-6+\lambda(4+6)=-1+\mu(-1+1)$

$0+\lambda (0) = -5 +\mu(5+5)$

$0+\lambda (0)=0+\mu (0)$

The last of these tell us nothing, the second tells us $\mu=1/2$ , and the first tells us that $\lambda=1/2$ .

And the point of intersection is: $(-1,0,0)$

RonL