Simple answer for intersecting lines?

[LLINE]

I am scratching my head trying to figure out how to display a XY pixel value for 2 intersecting lines.

I am working on a 2d graphical application that deals with lines or slopes.

> Both lines always intersect

> I have line "CD" which pixel values are known for both C and D

> I know the pixel location of A

> the application is dynamic in that I can grab point B and move it vertically (assuming that CD is somewhat horizontal)

> I am attempting to display the pixel values in which AB and CD intersect

Can anybody lead me in the right direction? I appreciate your help!

[Dino]

This post is very vague.

Do you need help with the formula to find the intersection point of two lines?
Or, do you need help with the code to display a pixel?
And, what platform and what GUI?
And the really big question is... why does you head itch?

Todd

[Magos]

Searching on this brings up this

[VirtualAce]

Usually to see if two lines are intersecting you would set them equal to one another and solve.

[LLINE]

This post is very vague.

Do you need help with the formula to find the intersection point of two lines?
Or, do you need help with the code to display a pixel?
And, what platform and what GUI?
And the really big question is... why does you head itch?

Todd

Just need help with the equation. - My head itches b/c I have no idea what I am doing :>)

[Dino]

See here for a good explanation:

http://id.mind.net/~zona/mmts/inters...TwoLines1.html

And here for sample source code:

http://local.wasp.uwa.edu.au/~pbourk...ry/lineline2d/

Todd

[LLINE]

Thanks Todd and everyone else!!!