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

raytrace.c

@@ -4,6 +4,8 @@
 #include "vectorOp.h"
 #define MAXSPHERES 100
 #include "helper.h"
+#include <math.h>
+#define epsilon 1e-8
 
 RGBA raytraceSphere(sphere **objectList, ray *lightray) {
     RGBA pixel = (RGBA){0,0,0,0};
@@ -12,7 +14,7 @@ RGBA raytraceSphere(sphere **objectList, ray *lightray) {
     //vec3 *spheresNormalList = (vec3 *)calloc( lightBounces + 1,sizeof(vec3) );
     int hitLightIndex = -1;
     vec3 sphereNormal;
-    int raysPerPixel = 2000;
+    int raysPerPixel = 20;
     ray originalRay = *lightray;
 
     for (int k = 0; k < raysPerPixel; k++) {
@@ -46,6 +48,9 @@ RGBA raytraceSphere(sphere **objectList, ray *lightray) {
                 spheresNormalList[j] = sphereNormal;
                 //diffus:
                 lightray->direction = vec3Add(sphereNormal, randUnitVector());
+                if (fabs(lightray->direction.x ) <= epsilon || fabs(lightray->direction.y ) <= epsilon || fabs(lightray->direction.z) <= epsilon) {
+                    lightray->direction = sphereNormal;
+                }
                 //reflektion:
                 //lightray->direction = vec3Add(lightray->direction, vec3Scale(sphereNormal, 2));
                 lightray->origin = nearestCollisionPoint;