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GuybrushNivek
Member Posts: **4**

in 3D Graphics

Hi all...

Can anyone help me find the line-plane intersection answer?

I have looked a bit at the web and a lot are presenting the formulas involved, but I need to know what elements within the formula mean...as an example, I need the technique in knowing :

how to find the point of intersection, if I know the points on a line,

L1(x , y , z) and L2(x , y , z) and

I think I know how to get the information for a plane stored, using a triangle I know lies on the plane, I get the vector perpendicular to this plane and normalise it, giving me

N(x , y , z),

But I dont know how to apply this information to get the point of intersection between the line and the plane...can anyone help?

Can anyone help me find the line-plane intersection answer?

I have looked a bit at the web and a lot are presenting the formulas involved, but I need to know what elements within the formula mean...as an example, I need the technique in knowing :

how to find the point of intersection, if I know the points on a line,

L1(x , y , z) and L2(x , y , z) and

I think I know how to get the information for a plane stored, using a triangle I know lies on the plane, I get the vector perpendicular to this plane and normalise it, giving me

N(x , y , z),

But I dont know how to apply this information to get the point of intersection between the line and the plane...can anyone help?

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## Comments

349If you don't have the SDK and don't want to download it I can send you only the sample.

nICO

[hr]

[italic]How beautiful, if sorrow had not made Sorrow more beautiful than Beauty itself.[/italic]

JOHN KEATS

4: If you don't have the SDK and don't want to download it I can send you only the sample.

:

: nICO

:

: [hr]

: [italic]How beautiful, if sorrow had not made Sorrow more beautiful than Beauty itself.[/italic]

: JOHN KEATS

:

Well, actually I am coding the routine myself in BlitzBasic2D...I am trying to learn most aspects of 3D, since it presents itself as a challenge. I am assuming that you are speaking of a DirectX Function?

349It also refers to this link, where they explain how to determine if a point it's outside of a polygon, and then they 'port' it in 3D.

http://forum.swarthmore.edu/dr.math/problems/scott5.31.96.html

Hope this helps!

PS: you'll need some matrix knowledge to actually understand how it is done.

nICO

[hr]

[italic]How beautiful, if sorrow had not made Sorrow more beautiful than Beauty itself.[/italic]

JOHN KEATS

4Well, thats me out then LOL...That'll come later tho...thanks anyways :-)