Chapter 11

1 files changed, 3 insertions, 1 deletions

diff --git a/rtiaw.go b/rtiaw.go
index d95501d..1427fbf 100644
--- a/rtiaw.go
+++ b/rtiaw.go
@@ -11,13 +11,15 @@ func main() {
 
   mat_ground := Lambertian{Vec3{0.8, 0.8, 0}};
   mat_centre := Lambertian{Vec3{0.1, 0.2, 0.5}};
-  mat_left   := Metal{Vec3{0.8, 0.8, 0.8}, 0.3};
+  mat_left   := Dielectric{1.5};
+  mat_bubble := Dielectric{1.0 / 1.5};
   mat_right  := Metal{Vec3{0.8, 0.6, 0.2}, 1.0};
 
   var world Hittables;
   world.Add(Sphere{Vec3{ 0,   -100.5, -1  }, 100  , mat_ground});
   world.Add(Sphere{Vec3{ 0,      0  , -1.2},   0.5, mat_centre});
   world.Add(Sphere{Vec3{-1.0,    0  , -1  },   0.5, mat_left});
+  world.Add(Sphere{Vec3{-1.0,    0  , -1  },   0.4, mat_bubble});
   world.Add(Sphere{Vec3{ 1.0,    0  , -1  },   0.5, mat_right});
 
   cam := NewCamera(400, 16.0/9.0, 100, 50);