weirdes farb artefakte auf den kugeln wenn ein licht zu nah dran ist

helper.c

@@ -6,6 +6,8 @@
 #include <stdlib.h>
 #include <math.h>
 #include "structs.h"
+#include "vectorOp.h"
+#define EPSILON 1e-8
 
 vec3 randUnitVector() {
     double x1,x2,lengthSquared;
@@ -22,3 +24,11 @@ vec3 randUnitVector() {
         1.0 - 2.0 * lengthSquared};
 }
 
+int epsilonCheck(vec3 p1, vec3 p2) { //if distance is to small, the test fails (return 0)
+    vec3 distanceVector = vec3Subtract(p1, p2);
+    double sumVector = fabs(distanceVector.x) + fabs(distanceVector.y) + fabs(distanceVector.z);
+    if (sumVector <= EPSILON) {
+        return 0;
+    }
+    return 1;
+}