diff --git a/Ray2f.c b/Ray2f.c
index a731c95..1edc295 100644
--- a/Ray2f.c
+++ b/Ray2f.c
@@ -53,7 +53,7 @@ int CgeRay2fIntersectRay(const float aStart[2], const float aDirection[2],
     float tmp[2];
     float time1, time2;
 
-    if (CgeRay2fIntersectTime(aStart, aDirection, bStart, bDirection, &time1, &time2))
+    if (!CgeRay2fIntersectTime(aStart, aDirection, bStart, bDirection, &time1, &time2))
         return 0;
 
     if (time1 < 0.0f || time2 < 0.0f)
@@ -72,7 +72,7 @@ int CgeRay2fIntersectSegment(const float aStart[2], const float aDirection[2],
     float time1, time2;
 
     CgeVec2fSub(bEnd, bStart, tmp);
-    if (CgeRay2fIntersectTime(aStart, aDirection, bStart, tmp, &time1, &time2))
+    if (!CgeRay2fIntersectTime(aStart, aDirection, bStart, tmp, &time1, &time2))
         return 0;
 
     if (time1 < 0.0f || time2 < 0.0f || time2 > 1.0f)
@@ -113,7 +113,7 @@ int CgeSegment2fIntersectSegment(const float aStart[2], const float aEnd[2],
 
     CgeVec2fSub(aEnd, aStart, tmp1);
     CgeVec2fSub(bEnd, bStart, tmp2);
-    if (CgeRay2fIntersectTime(aStart, tmp1, bStart, tmp2, &time1, &time2))
+    if (!CgeRay2fIntersectTime(aStart, tmp1, bStart, tmp2, &time1, &time2))
         return 0;
 
     if (time1 < 0.0f || time1 > 1.0f || time2 < 0.0f || time2 > 1.0f)
@@ -135,7 +135,7 @@ int CgeRay2fIntersectBox2f(const float aStart[2], const float aDirection[2],
     timeFar  =  1.0f / 0.0f;
 
     /* Check if origin inside box */
-    if (!CgeBox2fContains(bMin, bMax, aStart)) {
+    if (CgeBox2fContains(bMin, bMax, aStart)) {
         memcpy(out, aStart, sizeof(float) * 2);
         *t = 0.0f;
         return 1;
@@ -182,7 +182,7 @@ int CgeSegment2fIntersectBox2f(const float aStart[2], const float aEnd[2],
     float time;
 
     CgeVec2fSub(aEnd, aStart, tmp);
-    if (CgeRay2fIntersectBox2f(aStart, tmp, bMin, bMax, &time, out))
+    if (!CgeRay2fIntersectBox2f(aStart, tmp, bMin, bMax, &time, out))
         return 0;
 
     if (time > 1.0f)
diff --git a/Ray3f.c b/Ray3f.c
index c683569..2279a43 100644
--- a/Ray3f.c
+++ b/Ray3f.c
@@ -33,11 +33,11 @@ int CgeRay3fIntersectTriangle(const float start[3], const float direction[3],
     float time;
 
     /* Compute plane */
-    if (CgePlaneFromPoints(a, b, c, plane))
+    if (!CgePlaneFromPoints(a, b, c, plane))
         return 0;
 
     /* Compute intersection point in ray against plane */
-    if (CgeRay3fIntersectPlane(start, direction, plane, &time, tmp3))
+    if (!CgeRay3fIntersectPlane(start, direction, plane, &time, tmp3))
         return 0;
 
     /* Check if point inside rectangle */
@@ -94,11 +94,11 @@ int CgeSegment3fIntersectTriangle(const float start[3], const float end[3],
     float time;
 
     /* Compute plane */
-    if (CgePlaneFromPoints(a, b, c, plane))
+    if (!CgePlaneFromPoints(a, b, c, plane))
         return 0;
 
     /* Compute intersection point in ray against plane */
-    if (CgeSegment3fIntersectPlane(start, end, plane, &time, tmp3))
+    if (!CgeSegment3fIntersectPlane(start, end, plane, &time, tmp3))
         return 0;
 
     /* Check if point inside rectangle */
@@ -136,7 +136,7 @@ int CgeRay3fIntersectBox3f(const float aStart[3], const float aDirection[3],
     timeFar  =  1.0f / 0.0f;
 
     /* Check if origin inside box */
-    if (!CgeBox3fContains(bMin, bMax, aStart)) {
+    if (CgeBox3fContains(bMin, bMax, aStart)) {
         memcpy(out, aStart, sizeof(float) * 3);
         *t = 0.0f;
         return 1;
@@ -184,7 +184,7 @@ int CgeSegment3fIntersectBox3f(const float aStart[3], const float aEnd[3],
     float time;
 
     CgeVec3fSub(aEnd, aStart, tmp);
-    if (CgeRay3fIntersectBox3f(aStart, tmp, bMin, bMax, &time, out))
+    if (!CgeRay3fIntersectBox3f(aStart, tmp, bMin, bMax, &time, out))
         return 0;
 
     if (time > 1.0f)