problem

Please type up the problem? (I can hardly read your writing )

If I understand, half the problem is the same as your last one:
http://www.gamedev.net/community/forums/topic.asp?topic_id=152280

And I thought I had bad handwritting hehe..

I''m in the point (let it be K). Now I''m moving to the second point (let it be L). Now checking if the line KL intersected a triangle. So first I''m checking if the line KL intersected a plane that the triangle lies on. If it intersects, I''m searching for intersection point. I found (let it be M). So now I need to check if it is in the triangle. It is. So now I want to move KL back (in the reverse direction) by length of ML. So the L'' will be M, but I don''t know how to calculate K''. I can''t explain that more clearly. My english is too bad.

is my handwritting so bad?

Okay,

Here is my answer. You have points K, L, and M. The new points will be:

L'' = L - (L - M) = M
K'' = K - (L - M) = M + K - L

Try it, and it should work.

Graham Rhodes
Senior Scientist
Applied Research Associates, Inc.

thaks. that is exactly what I needed.