Chapter 8

1 files changed, 5 insertions, 3 deletions

diff --git a/vec3.go b/vec3.go
index 65d14e5..4212b46 100644
--- a/vec3.go
+++ b/vec3.go
@@ -53,9 +53,11 @@ func (v Vec3) Cross(w Vec3) Vec3 {
 }
 
 func (v Vec3) ToPPM() string {
-  r := uint8(255.999 * v.X);
-  g := uint8(255.999 * v.Y);
-  b := uint8(255.999 * v.Z);
+  i := Interval{0, 0.999};
+
+  r := uint8(256 * i.Clamp(v.X));
+  g := uint8(256 * i.Clamp(v.Y));
+  b := uint8(256 * i.Clamp(v.Z));
 
   return fmt.Sprintf("%3d %3d %3d", r, g, b);
 }