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lines intersecting
May 18, 2001 11:16 PM
how do you know when two line segments intersect each other?
We are here just like this,It really doesn't matter why.The world is here like it is,'We could laugh we could cry.Is it good or is it bad,Wright or maybe wrong?There's no use of being sad,Without a purpose within a song.
May 18, 2001 11:46 PM
nevermind....
r = ( ((ay - cy) * (dx - cx)) - ((ax - cx) * (dy - cy)) ) /
( ((bx - ax) * (dy - cy)) - ((by - ay) * (dx - cx)) );
s = ( ((ay - cy) * (bx - ax)) - ((ax - cx) * (by - ay)) ) /
( ((bx - ax) * (dy - cy)) - ((by - ay) * (dx - cx)) );
if ( r < 0.0f || r > 1.0f || s < 0.0f || s > 1.0f )
return false;
else
return true;
r = ( ((ay - cy) * (dx - cx)) - ((ax - cx) * (dy - cy)) ) /
( ((bx - ax) * (dy - cy)) - ((by - ay) * (dx - cx)) );
s = ( ((ay - cy) * (bx - ax)) - ((ax - cx) * (by - ay)) ) /
( ((bx - ax) * (dy - cy)) - ((by - ay) * (dx - cx)) );
if ( r < 0.0f || r > 1.0f || s < 0.0f || s > 1.0f )
return false;
else
return true;
We are here just like this,It really doesn't matter why.The world is here like it is,'We could laugh we could cry.Is it good or is it bad,Wright or maybe wrong?There's no use of being sad,Without a purpose within a song.
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