diff --git a/small3dlib.h b/small3dlib.h
index 8430b25..3817a30 100644
--- a/small3dlib.h
+++ b/small3dlib.h
@@ -393,9 +393,9 @@ void S3L_initDrawConfig(S3L_DrawConfig *config);
 
 typedef struct
 {
-  S3L_Unit *vertices;
+  const S3L_Unit *vertices;
   S3L_Index vertexCount;
-  S3L_Index *triangles;
+  const S3L_Index *triangles;
   S3L_Index triangleCount;
   S3L_Transform3D transform;
   S3L_DrawConfig config;
@@ -906,7 +906,7 @@ void S3L_rotationToDirections(
     forw->x = 0;
     forw->y = 0;
     forw->z = length;
-    S3L_vec3Xmat4(forw,*m);
+    S3L_vec3Xmat4(forw,&m);
   }
 
   if (right != 0)
@@ -914,7 +914,7 @@ void S3L_rotationToDirections(
     right->x = length;
     right->y = 0;
     right->z = 0;
-    S3L_vec3Xmat4(right,*m);
+    S3L_vec3Xmat4(right,&m);
   }
 
   if (up != 0)
@@ -922,7 +922,7 @@ void S3L_rotationToDirections(
     up->x = 0;
     up->y = length;
     up->z = 0;
-    S3L_vec3Xmat4(up,*m);
+    S3L_vec3Xmat4(up,&m);
   }
 }
 
@@ -1773,8 +1773,8 @@ void S3L_drawScene(S3L_Scene scene)
 {
   for (S3L_Index modelIndex; modelIndex < scene.modelCount; ++modelIndex)
   {
-    S3L_Unit *vertices = scene.models[modelIndex].vertices;
-    S3L_Index *triangles = scene.models[modelIndex].triangles;
+    const S3L_Unit *vertices = scene.models[modelIndex].vertices;
+    const S3L_Index *triangles = scene.models[modelIndex].triangles;
  
     S3L_Index triangleIndex = 0;
     S3L_Index coordIndex = 0;
diff --git a/testSDL.c b/testSDL.c
index ccf8147..7be4013 100644
--- a/testSDL.c
+++ b/testSDL.c
@@ -17,7 +17,7 @@
 #define S3L_COMPUTE_DEPTH 1
 #define S3L_PERSPECTIVE_CORRECTION 1
 
-#include "s3l.h"
+#include "small3dlib.h"
 
 #include "house.h"
 
@@ -106,7 +106,8 @@ void drawPixel(S3L_PixelInfo *p)
     return;
   }
 
-  S3L_Unit u, v, *coords;
+  S3L_Unit u, v;
+  const S3L_Unit *coords;
 
   coords = tex_coords + p->triangleID * 6;
 /*
@@ -128,7 +129,7 @@ void drawPixel(S3L_PixelInfo *p)
 
 uint8_t sss = (p->depth / 5000.0) * 255  ;
 
-setPixel(p->x,p->y,sss,sss,128);
+setPixel(p->x,p->y,sss, (p->triangleID * 37) % 255 ,128);
 
 //setPixel(p->x,p->y,p->modelID * 64,p->modelID * 128,255);
 
@@ -169,7 +170,7 @@ int main()
 
   scene.camera.transform.translation.z = -S3L_FRACTIONS_PER_UNIT * 2;
   scene.modelCount = 2;
-  scene.models = &models;
+  scene.models = models;
 
   scene.models[0].vertices = ver;
   scene.models[0].vertexCount = S3L_CUBE_VERTEX_COUNT; 
@@ -181,9 +182,12 @@ int main()
 
 //  scene.models[1] = scene.models[0];
 //  scene.models[1].transform.translation.x = 0.5 * S3L_FRACTIONS_PER_UNIT;
+
   scene.models[1] = house;
   S3L_initTransoform3D(&(scene.models[1].transform));
   S3L_initDrawConfig(&(scene.models[1].config));
+  scene.models[1].transform.translation.y = -1 * S3L_FRACTIONS_PER_UNIT;
+  scene.models[1].transform.translation.z = 4 * S3L_FRACTIONS_PER_UNIT;
 
 //  scene.camera.transform.translation.x = S3L_FRACTIONS_PER_UNIT;
 //  scene.camera.transform.translation.y = S3L_FRACTIONS_PER_UNIT;