diff --git a/programs/hqOffline.c b/programs/hqOffline.c
index a9c42e9..861f779 100644
--- a/programs/hqOffline.c
+++ b/programs/hqOffline.c
@@ -150,13 +150,13 @@ void drawPixel(S3L_PixelInfo *p)
   S3L_Vec4 reflected;
   S3L_Unit blend = 0;
 
-  position.x = S3L_interpolateBarycentric(v0.x,v1.x,v2.x,p->barycentric[0],p->barycentric[1],p->barycentric[2]);
-  position.y = S3L_interpolateBarycentric(v0.y,v1.y,v2.y,p->barycentric[0],p->barycentric[1],p->barycentric[2]);
-  position.z = S3L_interpolateBarycentric(v0.z,v1.z,v2.z,p->barycentric[0],p->barycentric[1],p->barycentric[2]);
+  position.x = S3L_interpolateBarycentric(v0.x,v1.x,v2.x,p->barycentric);
+  position.y = S3L_interpolateBarycentric(v0.y,v1.y,v2.y,p->barycentric);
+  position.z = S3L_interpolateBarycentric(v0.z,v1.z,v2.z,p->barycentric);
 
-  normal.x = S3L_interpolateBarycentric(n0.x,n1.x,n2.x,p->barycentric[0],p->barycentric[1],p->barycentric[2]);
-  normal.y = S3L_interpolateBarycentric(n0.y,n1.y,n2.y,p->barycentric[0],p->barycentric[1],p->barycentric[2]);
-  normal.z = S3L_interpolateBarycentric(n0.z,n1.z,n2.z,p->barycentric[0],p->barycentric[1],p->barycentric[2]);
+  normal.x = S3L_interpolateBarycentric(n0.x,n1.x,n2.x,p->barycentric);
+  normal.y = S3L_interpolateBarycentric(n0.y,n1.y,n2.y,p->barycentric);
+  normal.z = S3L_interpolateBarycentric(n0.z,n1.z,n2.z,p->barycentric);
 
   toCameraDirection.x = scene.camera.transform.translation.x - position.x;
   toCameraDirection.y = scene.camera.transform.translation.y - position.y; 
diff --git a/programs/modelViewer.c b/programs/modelViewer.c
index 76cbbc9..6ca2fba 100644
--- a/programs/modelViewer.c
+++ b/programs/modelViewer.c
@@ -253,11 +253,8 @@ void drawPixel(S3L_PixelInfo *p)
     {
       S3L_Unit uv[2];
 
-      uv[0] = S3L_interpolateBarycentric(uv0[0],uv1[0],uv2[0],
-        p->barycentric[0], p->barycentric[1], p->barycentric[2]);
-
-      uv[1] = S3L_interpolateBarycentric(uv0[1],uv1[1],uv2[1],
-        p->barycentric[0], p->barycentric[1], p->barycentric[2]);
+      uv[0] = S3L_interpolateBarycentric(uv0[0],uv1[0],uv2[0],p->barycentric);
+      uv[1] = S3L_interpolateBarycentric(uv0[1],uv1[1],uv2[1],p->barycentric);
 
       sampleTexture(uv[0] / 4,uv[1] / 4,&r,&g,&b);
 
@@ -280,14 +277,9 @@ void drawPixel(S3L_PixelInfo *p)
     {
       S3L_Vec4 n;
 
-      n.x = S3L_interpolateBarycentric(n0.x,n1.x,n2.x,
-        p->barycentric[0], p->barycentric[1], p->barycentric[2]);
-
-      n.y = S3L_interpolateBarycentric(n0.y,n1.y,n2.y,
-        p->barycentric[0], p->barycentric[1], p->barycentric[2]);
-
-      n.z = S3L_interpolateBarycentric(n0.z,n1.z,n2.z,
-        p->barycentric[0], p->barycentric[1], p->barycentric[2]);
+      n.x = S3L_interpolateBarycentric(n0.x,n1.x,n2.x,p->barycentric);
+      n.y = S3L_interpolateBarycentric(n0.y,n1.y,n2.y,p->barycentric);
+      n.z = S3L_interpolateBarycentric(n0.z,n1.z,n2.z,p->barycentric);
 
       S3L_normalizeVec3(&n);
 
@@ -327,8 +319,7 @@ void drawPixel(S3L_PixelInfo *p)
 
   if (light)
   {
-    int16_t l = S3L_interpolateBarycentric(l0,l1,l2,
-      p->barycentric[0], p->barycentric[1], p->barycentric[2]);
+    int16_t l = S3L_interpolateBarycentric(l0,l1,l2,p->barycentric);
 
     r = S3L_clamp((((int16_t) r) * l) / S3L_FRACTIONS_PER_UNIT,0,255);
     g = S3L_clamp((((int16_t) g) * l) / S3L_FRACTIONS_PER_UNIT,0,255);
diff --git a/small3dlib.h b/small3dlib.h
index 3293214..cedd772 100644
--- a/small3dlib.h
+++ b/small3dlib.h
@@ -556,9 +556,7 @@ static inline S3L_Unit S3L_interpolateBarycentric(
   S3L_Unit value0,
   S3L_Unit value1,
   S3L_Unit value2,
-  S3L_Unit barycentric0,
-  S3L_Unit barycentric1,
-  S3L_Unit barycentric2);
+  S3L_Unit barycentric[3]);
 
 static inline void S3L_mapProjectionPlaneToScreen(
   S3L_Vec4 point,
@@ -1517,15 +1515,13 @@ static inline S3L_Unit S3L_interpolateBarycentric(
   S3L_Unit value0,
   S3L_Unit value1,
   S3L_Unit value2,
-  S3L_Unit barycentric0,
-  S3L_Unit barycentric1,
-  S3L_Unit barycentric2)
+  S3L_Unit barycentric[3])
 {
   return
     (
-      (value0 * barycentric0) +
-      (value1 * barycentric1) +
-      (value2 * barycentric2)
+      (value0 * barycentric[0]) +
+      (value1 * barycentric[1]) +
+      (value2 * barycentric[2])
     ) / S3L_FRACTIONS_PER_UNIT;
 }