need function for computing intersection of line and hyperbola

[meow]

Hi,

well, this time im after a function which determines the intersection of a 2d line and a hyperbola. I also need to know the normal. ( a line perpendicular to the curve)

any one know of one ?

Im not sure I want to go into the maths on this one, so a being spoon fed some function or code to do it would be ideal

its for a lens ray tracing program, which uses simple circles atm, but cuases slight aberations.

at least it wasnt too dificult to work out the function for the circles.

[LippoW]

Ray Tracing Package - Application Center

That any help?

[meow]

cool, thanks, it looks like its got inside it what I need, although it doesnt look like you can see the code for free..

[meow]

ooh ive managed to solve this, was tricky,, had to get the help of a trigger gnome,,

public int Intersect(double m, double c, ref Vector v1, ref Vector v2)
{
quadratic q = new quadratic();
q.a = 1 / (a * a) - (m * m) / (b * b);
q.b = -2 * m * c / (b * b);
q.c = -(c * c) / (b * b) - 1;
double p1 = 0, p2 = 0;
int cnt = q.Solve(ref p1, ref p2);
v1.X = p1;
v1.Y = v1.X * m + c;
v2.X = p2;
v2.Y = v2.X * m + c;
return cnt;
}