add simple scene

src/main/java/eu/jonahbauer/raytracing/Main.java

@@ -19,6 +19,7 @@ import org.jetbrains.annotations.NotNull;
 import java.io.IOException;
 import java.nio.file.Path;
 import java.util.ArrayList;
+import java.util.List;
 import java.util.Random;
 
 public class Main {
@@ -83,4 +84,14 @@ public class Main {
 
         return new Scene(objects);
     }
+
+    private static @NotNull Scene getSimpleScene() {
+        return new Scene(List.of(
+                new Sphere(new Vec3(0, -100.5, -1.0), 100.0, new LambertianMaterial(new Color(0.8, 0.8, 0.0))),
+                new Sphere(new Vec3(0, 0, -1.2), 0.5, new LambertianMaterial(new Color(0.1, 0.2, 0.5))),
+                new Sphere(new Vec3(-1.0, 0, -1.2), 0.5, new DielectricMaterial(1.5)),
+                new Sphere(new Vec3(-1.0, 0, -1.2), 0.4, new DielectricMaterial(1 / 1.5)),
+                new Sphere(new Vec3(1.0, 0, -1.2), 0.5, new MetallicMaterial(new Color(0.8, 0.6, 0.2), 0.0))
+        ));
+    }
 }