# How to know direction of point

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• Jun 7th 2010, 06:04 AM
Zirok
Ya, you are absolutely & I agree your Point completely.

I fully agree your suggestions but this can be called as a communication failure on myside to describe full set of possible conditions.

In the attached figure, both the lines are in 3rd quadrant, but a possiblity is that Line AB is in 2nd, CD In 4th & so on......The list is endless.

So, the direction is vital to derive to proceed for swapping further.

Zirok
• Jun 7th 2010, 06:10 AM
undefined
Quote:

Originally Posted by Zirok
Ya, you are absolutely & I agree your Point completely.

I fully agree your suggestions but this can be called as a communication failure on myside to describe full set of possible conditions.

In the attached figure, both the lines are in 3rd quadrant, but a possiblity is that Line AB is in 2nd, CD In 4th & so on......The list is endless.

So, the direction is vital to derive to proceed for swapping further.

Zirok

What attached figure? Did you forget to attach it? This is a bit of a struggle. (Rofl)

If quadrants are important, then you should probably include the x- and y-axes in whatever image you choose to share...

Also, it doesn't make sense to say that a line is confined to one quadrant. A line is infinite and must span at least two quadrants, unless it coincides with an axis..
• Jun 7th 2010, 06:25 AM
Zirok
Than, i need to write endless conditions such as -

if Line AB - 1st, CD - 1st, than d1 should be on positive side of Interesection Point (Wondering)
If Line AB - 1st, CD - 2nd ,, & so on..............(Wondering)

If i would get some logic to know the direction of the line, i would have not struggled so much to imagine....
• Jun 7th 2010, 06:40 AM
undefined
Quote:

Originally Posted by Zirok
Than, i need to write endless conditions such as -

if Line AB - 1st, CD - 1st, than d1 should be on positive side of Interesection Point (Wondering)
If Line AB - 1st, CD - 2nd ,, & so on..............(Wondering)

If i would get some logic to know the direction of the line, i would have not struggled so much to imagine....

I'm sorry, but your questions are non well-formulated enough to permit an answer to be given. As was already mentioned, there is no "positive" or "negative" side of an intersection; the direction can be given as a vector, or as an angle between 0 and 360 degrees (or 0 and 2pi radians), and there is only positive/negative in the x-direction or y-direction, or in the direction of some other axis of your choosing.

I would like to help you, but I simply cannot answer a question that does not make sense. I hope you find your answer soon! I will try to continue helping. I might be busy though as the work week is starting in my time zone. The other people here will also be able to answer questions.
• Jun 7th 2010, 06:55 AM
Zirok
Thanks Sir, for your valueable time & unmatched support & Interest in My Problem.

:)
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