refactor Shape

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

@@ -2,8 +2,8 @@ package eu.jonahbauer.raytracing;
 
 import eu.jonahbauer.raytracing.render.Camera;
 import eu.jonahbauer.raytracing.render.ImageIO;
-import eu.jonahbauer.raytracing.shape.Scene;
-import eu.jonahbauer.raytracing.shape.Sphere;
+import eu.jonahbauer.raytracing.scene.Scene;
+import eu.jonahbauer.raytracing.scene.Sphere;
 
 import java.io.IOException;
 import java.nio.file.Path;

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

@@ -1,8 +1,9 @@
 package eu.jonahbauer.raytracing.render;
 
+import eu.jonahbauer.raytracing.math.Range;
 import eu.jonahbauer.raytracing.math.Ray;
 import eu.jonahbauer.raytracing.math.Vec3;
-import eu.jonahbauer.raytracing.shape.Scene;
+import eu.jonahbauer.raytracing.scene.Scene;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Objects;
@@ -52,7 +53,7 @@ public record Camera(
             var y = pixel.y();
             var ray = pixel.ray();
 
-            var result = scene.hit(ray);
+            var result = scene.hit(ray, Range.NON_NEGATIVE);
             if (result.isPresent()) {
                 var normal = result.get().normal();
                 image.set(x, y, getNormalColor(normal));

src/main/java/eu/jonahbauer/raytracing/scene/HitResult.java

@@ -1,4 +1,4 @@
-package eu.jonahbauer.raytracing.shape;
+package eu.jonahbauer.raytracing.scene;
 
 import eu.jonahbauer.raytracing.math.Vec3;
 import org.jetbrains.annotations.NotNull;

src/main/java/eu/jonahbauer/raytracing/scene/Hittable.java

@@ -1,4 +1,4 @@
-package eu.jonahbauer.raytracing.shape;
+package eu.jonahbauer.raytracing.scene;
 
 import eu.jonahbauer.raytracing.math.Range;
 import eu.jonahbauer.raytracing.math.Ray;
@@ -6,7 +6,7 @@ import org.jetbrains.annotations.NotNull;
 
 import java.util.Optional;
 
-public sealed interface Shape permits Sphere {
+public interface Hittable {
 
     /**
      * {@return the value <code>t</code> such that <code>ray.at(t)</code> is the intersection of this shaped closest to

src/main/java/eu/jonahbauer/raytracing/scene/Scene.java

@@ -1,4 +1,4 @@
-package eu.jonahbauer.raytracing.shape;
+package eu.jonahbauer.raytracing.scene;
 
 import eu.jonahbauer.raytracing.math.Range;
 import eu.jonahbauer.raytracing.math.Ray;
@@ -8,24 +8,23 @@ import org.jetbrains.annotations.NotNull;
 import java.util.List;
 import java.util.Optional;
 
-public record Scene(@NotNull List<@NotNull Shape> shapes) {
+public record Scene(@NotNull List<@NotNull Hittable> objects) implements Hittable {
 
     public Scene {
-        shapes = List.copyOf(shapes);
+        objects = List.copyOf(objects);
     }
 
-    public Scene(@NotNull Shape @NotNull ... shapes) {
-        this(List.of(shapes));
+    public Scene(@NotNull Hittable @NotNull ... objects) {
+        this(List.of(objects));
     }
 
-    public @NotNull Optional<HitResult> hit(@NotNull Ray ray) {
-        var range = new Range(0, Double.POSITIVE_INFINITY);
+    public @NotNull Optional<HitResult> hit(@NotNull Ray ray, @NotNull Range range) {
         var result = (HitResult) null;
-        for (var shape : shapes) {
-            var r = shape.hit(ray, range);
-            if (r.isPresent() && (result == null || r.get().t() < result.t())) {
+        for (var object : objects) {
+            var r = object.hit(ray, range);
+            if (r.isPresent() && range.surrounds(r.get().t())) {
                 result = r.get();
-                range = new Range(0, result.t());
+                range = new Range(range.min(), result.t());
             }
         }
         return Optional.ofNullable(result);

src/main/java/eu/jonahbauer/raytracing/scene/Sphere.java

@@ -1,4 +1,4 @@
-package eu.jonahbauer.raytracing.shape;
+package eu.jonahbauer.raytracing.scene;
 
 import eu.jonahbauer.raytracing.math.Range;
 import eu.jonahbauer.raytracing.math.Ray;
@@ -8,7 +8,7 @@ import org.jetbrains.annotations.NotNull;
 import java.util.Objects;
 import java.util.Optional;
 
-public record Sphere(@NotNull Vec3 center, double radius) implements Shape {
+public record Sphere(@NotNull Vec3 center, double radius) implements Hittable {
     public static final @NotNull Sphere UNIT = new Sphere(Vec3.ZERO, 1.0);
 
     public Sphere {

src/test/java/eu/jonahbauer/raytracing/scene/SphereTest.java

@@ -1,4 +1,4 @@
-package eu.jonahbauer.raytracing.shape;
+package eu.jonahbauer.raytracing.scene;
 
 import eu.jonahbauer.raytracing.math.Range;
 import eu.jonahbauer.raytracing.math.Ray;