diff --git a/geotypes.cpp b/geotypes.cpp
index 8afda26..79f0f7b 100644
--- a/geotypes.cpp
+++ b/geotypes.cpp
@@ -65,14 +65,13 @@ Punkt3D Sphere::getPos() const {
 int Sphere::getIntersectionParam(const Ray &ray, float *param1, float *param2) {
 	int numerg;
 	// ax^2 + bx + c = 0
-	segl::Punkt3D ehv(1.0f, 1.0f, 1.0f);
-	float a = ray.dir*ehv;
-	float b = 2*(ray.pos*ehv + pos*ehv);
-	float c = ray.pos*ray.pos + pos*pos - 2*(ray.pos*pos) - radius*radius;
+	float a = ray.dir * ray.dir;
+	float b = 2 * ray.dir * (ray.pos - pos);
+	float c = ray.pos * ray.pos - 2 * ray.pos * pos + pos * pos - radius * radius;
 	
 	float p = b/a;
 	float q = c/a;
-	
+	std::cout << p << " " << q << std::endl;
 	if((p*p)/4.0f<q) {
 		numerg = 0;
 	} else if((p*p)/4.0f==q) {