observing whether a point is in a triangle???

This is a discussion on observing whether a point is in a triangle??? within the C++ Programming forums, part of the General Programming Boards category; hi guys. i have a problem. i did others like this but this is different i have three points.let me ...

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    Question observing whether a point is in a triangle???

    hi guys. i have a problem. i did others like this but this is different

    i have three points.let me say (x1,y1), (x2,y2) and (x3,y3).
    as you see these points construct a triangle. my base is (x1,y1) point. and we have a fourth point lets say (a,b). a and b are numbers relative to (x1,y1) point. i mean if (a,b)=(3,4) then it is equal to (x1+3,y1+4). and now the problm is: how can i observe that this point is in the triangle. i mean i give some random point and i want to determine whether this point is in the triangle or not.

    thanks in advance
    Last edited by hebele; 05-19-2003 at 03:17 PM.

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