apply gamma correction

src/main/java/eu/jonahbauer/raytracing/render/Camera.java

@@ -21,9 +21,10 @@ public final class Camera {
     private final @NotNull Vec3 origin;
     private final @NotNull Vec3 direction;
 
-    // antialiasing
+    // rendering
     private final int samplesPerPixel = 100;
     private final int maxDepth = 10;
+    private final double gamma = 2.0;
 
     // internal properties
     private final @NotNull Vec3 pixelU;
@@ -103,7 +104,11 @@ public final class Camera {
                     b += color.b();
                 }
 
-                image.set(x, y, new Color(r / samplesPerPixel, g / samplesPerPixel, b / samplesPerPixel));
+                image.set(x, y, new Color(
+                        Math.pow(r / samplesPerPixel, 1 / gamma),
+                        Math.pow(g / samplesPerPixel, 1 / gamma),
+                        Math.pow(b / samplesPerPixel, 1 / gamma)
+                ));
             }
         }