How to do ray plane intersection?

Question

How do I calculate the intersection between a ray and a plane?

Code

This produces the wrong results.

float denom = normal.dot(ray.direction         


        

Answer 1

implementation of vwvan's answer

Vector3 Intersect(Vector3 planeP, Vector3 planeN, Vector3 rayP, Vector3 rayD)
{
    var d = Vector3.Dot(planeP, -planeN);
    var t = -(d + rayP.z * planeN.z + rayP.y * planeN.y + rayP.x * planeN.x) / (rayD.z * planeN.z + rayD.y * planeN.y + rayD.x * planeN.x);
    return rayP + t * rayD;
}