Bug in intersection test was fixed.

.gitignore

@@ -1,3 +1,5 @@
 .DS_Store
 main
 *.coverprofile
+*.jpg
+*.prof

Makefile

@@ -3,6 +3,7 @@ all:
 	go build ./...
 
 run:
+	export GOPATH=`pwd`
 	go build ./src/main.go && ./main
 
 test:

src/core/bounds3d_test.go

@@ -49,3 +49,14 @@ func TestBounds3dIntersect(t *testing.T) {
         t.Errorf("Failed: %f vs %f", tMin, 0.5)
     }
 }
+
+func TestMaxExtent(t *testing.T) {
+    b1 := Bounds3d{
+        MinPos: Vector3d{1.0, 2.0, 3.0},
+        MaxPos: Vector3d{2.0, 4.0, 6.0},
+    }
+
+    if b1.MaxExtent() != 2 {
+        t.Error("Max extent test is failed!")
+    }
+}

src/shape/triangle.go

@@ -54,10 +54,10 @@ func (t *Triangle) Intersect(ray *Ray, isect *Intersection) bool {
 func (t *Triangle) Bounds() Bounds3d {
     b := NewBounds3d()
     b.MinPos.X = math.Min(t.Points[0].X, math.Min(t.Points[1].X, t.Points[2].X))
-    b.MinPos.X = math.Min(t.Points[0].Y, math.Min(t.Points[1].Y, t.Points[2].Y))
-    b.MinPos.X = math.Min(t.Points[0].Z, math.Min(t.Points[1].Z, t.Points[2].Z))
+    b.MinPos.Y = math.Min(t.Points[0].Y, math.Min(t.Points[1].Y, t.Points[2].Y))
+    b.MinPos.Z = math.Min(t.Points[0].Z, math.Min(t.Points[1].Z, t.Points[2].Z))
     b.MaxPos.X = math.Max(t.Points[0].X, math.Max(t.Points[1].X, t.Points[2].X))
-    b.MaxPos.X = math.Max(t.Points[0].Y, math.Max(t.Points[1].Y, t.Points[2].Y))
-    b.MaxPos.X = math.Max(t.Points[0].Z, math.Max(t.Points[1].Z, t.Points[2].Z))
+    b.MaxPos.Y = math.Max(t.Points[0].Y, math.Max(t.Points[1].Y, t.Points[2].Y))
+    b.MaxPos.Z = math.Max(t.Points[0].Z, math.Max(t.Points[1].Z, t.Points[2].Z))
     return b
 }