move examples to their own file
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96909002d7
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package eu.jonahbauer.raytracing;
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import eu.jonahbauer.raytracing.render.camera.Camera;
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import eu.jonahbauer.raytracing.scene.Scene;
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import org.jetbrains.annotations.NotNull;
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public record Example(@NotNull Scene scene, @NotNull Camera camera) {
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}
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package eu.jonahbauer.raytracing;
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import eu.jonahbauer.raytracing.math.Vec3;
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import eu.jonahbauer.raytracing.render.Color;
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import eu.jonahbauer.raytracing.render.camera.SimpleCamera;
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import eu.jonahbauer.raytracing.render.material.*;
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import eu.jonahbauer.raytracing.scene.Hittable;
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import eu.jonahbauer.raytracing.scene.Scene;
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import eu.jonahbauer.raytracing.scene.SkyBox;
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import eu.jonahbauer.raytracing.scene.hittable2d.Parallelogram;
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import eu.jonahbauer.raytracing.scene.hittable3d.ConstantMedium;
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import eu.jonahbauer.raytracing.scene.hittable3d.Sphere;
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import eu.jonahbauer.raytracing.scene.util.Hittables;
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import org.jetbrains.annotations.NotNull;
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import java.util.*;
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import java.util.function.IntFunction;
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public class Examples {
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private static final Map<String, IntFunction<Example>> REGISTRY = new HashMap<>();
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private static void register(@NotNull String name, @NotNull IntFunction<Example> example) {
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REGISTRY.put(name, example);
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}
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static {
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register("SIMPLE", Examples::getSimpleScene);
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register("SPHERES", Examples::getSpheres);
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register("SQUARES", Examples::getSquares);
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register("LIGHT", Examples::getLight);
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register("CORNELL", Examples::getCornellBox);
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register("CORNELL_SMOKE", Examples::getCornellBoxSmoke);
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}
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public static @NotNull IntFunction<Example> getByName(@NotNull String name) {
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var out = REGISTRY.get(name);
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if (out == null) throw new IllegalArgumentException("unknown example " + name + ", expected one of " + REGISTRY.keySet());
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return out;
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}
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public static @NotNull Example getSimpleScene(int height) {
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if (height <= 0) height = 675;
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return new Example(
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new Scene(
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getSkyBox(),
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new Sphere(new Vec3(0, -100.5, -1.0), 100.0, new LambertianMaterial(new Color(0.8, 0.8, 0.0))),
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new Sphere(new Vec3(0, 0, -1.2), 0.5, new LambertianMaterial(new Color(0.1, 0.2, 0.5))),
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new Sphere(new Vec3(-1.0, 0, -1.2), 0.5, new DielectricMaterial(1.5)),
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new Sphere(new Vec3(-1.0, 0, -1.2), 0.4, new DielectricMaterial(1 / 1.5)),
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new Sphere(new Vec3(1.0, 0, -1.2), 0.5, new MetallicMaterial(new Color(0.8, 0.6, 0.2), 0.0))
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),
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SimpleCamera.builder()
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.withImage(height * 16 / 9, height)
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.build()
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);
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}
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public static @NotNull Example getSpheres(int height) {
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if (height <= 0) height = 675;
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var rng = new Random(1);
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var objects = new ArrayList<Hittable>();
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objects.add(new Sphere(new Vec3(0, -1000, 0), 1000, new LambertianMaterial(new Color(0.5, 0.5, 0.5))));
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for (int a = -11; a < 11; a++) {
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for (int b = -11; b < 11; b++) {
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var center = new Vec3(a + 0.9 * rng.nextDouble(), 0.2, b + 0.9 * rng.nextDouble());
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if (Vec3.distance(center, new Vec3(4, 0.2, 0)) <= 0.9) continue;
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Material material;
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var rnd = rng.nextDouble();
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if (rnd < 0.8) {
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// diffuse
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var albedo = Color.multiply(Color.random(rng), Color.random(rng));
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material = new LambertianMaterial(albedo);
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} else if (rnd < 0.95) {
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// metal
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var albedo = Color.random(rng, 0.5, 1.0);
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var fuzz = rng.nextDouble() * 0.5;
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material = new MetallicMaterial(albedo, fuzz);
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} else {
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// glass
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material = new DielectricMaterial(1.5);
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}
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objects.add(new Sphere(center, 0.2, material));
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}
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}
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objects.add(new Sphere(new Vec3(0, 1, 0), 1.0, new DielectricMaterial(1.5)));
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objects.add(new Sphere(new Vec3(-4, 1, 0), 1.0, new LambertianMaterial(new Color(0.4, 0.2, 0.1))));
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objects.add(new Sphere(new Vec3(4, 1, 0), 1.0, new MetallicMaterial(new Color(0.7, 0.6, 0.5))));
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var camera = SimpleCamera.builder()
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.withImage(height * 16 / 9, height)
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.withPosition(new Vec3(13, 2, 3))
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.withTarget(new Vec3(0, 0, 0))
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.withFieldOfView(Math.toRadians(20))
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.withFocusDistance(10.0)
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.withBlurAngle(Math.toRadians(0.6))
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.build();
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return new Example(new Scene(getSkyBox(), objects), camera);
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}
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public static @NotNull Example getSquares(int height) {
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if (height <= 0) height = 600;
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return new Example(
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new Scene(
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getSkyBox(),
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new Parallelogram(new Vec3(-3, -2, 5), new Vec3(0, 0, -4), new Vec3(0, 4, 0), new LambertianMaterial(new Color(1.0, 0.2, 0.2))),
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new Parallelogram(new Vec3(-2, -2, 0), new Vec3(4, 0, 0), new Vec3(0, 4, 0), new LambertianMaterial(new Color(0.2, 1.0, 0.2))),
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new Parallelogram(new Vec3(3, -2, 1), new Vec3(0, 0, 4), new Vec3(0, 4, 0), new LambertianMaterial(new Color(0.2, 0.2, 1.0))),
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new Parallelogram(new Vec3(-2, 3, 1), new Vec3(4, 0, 0), new Vec3(0, 0, 4), new LambertianMaterial(new Color(1.0, 0.5, 0.0))),
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new Parallelogram(new Vec3(-2, -3, 5), new Vec3(4, 0, 0), new Vec3(0, 0, -4), new LambertianMaterial(new Color(0.2, 0.8, 0.8)))
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),
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SimpleCamera.builder()
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.withImage(height, height)
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.withFieldOfView(Math.toRadians(80))
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.withPosition(new Vec3(0, 0, 9))
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.withTarget(new Vec3(0, 0, 0))
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.build()
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);
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}
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public static @NotNull Example getLight(int height) {
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if (height <= 0) height = 225;
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return new Example(
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new Scene(
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new Sphere(new Vec3(0, -1000, 0), 1000, new LambertianMaterial(new Color(0.2, 0.2, 0.2))),
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new Sphere(new Vec3(0, 2, 0), 2, new LambertianMaterial(new Color(0.2, 0.2, 0.2))),
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new Parallelogram(new Vec3(3, 1, -2), new Vec3(2, 0, 0), new Vec3(0, 2, 0), new DiffuseLight(new Color(4.0, 4.0, 4.0))),
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new Sphere(new Vec3(0, 7, 0), 2, new DiffuseLight(new Color(4.0, 4.0, 4.0)))
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),
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SimpleCamera.builder()
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.withImage(height * 16 / 9, height)
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.withFieldOfView(Math.toRadians(20))
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.withPosition(new Vec3(26, 3, 6))
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.withTarget(new Vec3(0, 2, 0))
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.build()
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);
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}
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public static @NotNull Example getCornellBox(int height) {
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if (height <= 0) height = 600;
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var red = new LambertianMaterial(new Color(.65, .05, .05));
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var white = new LambertianMaterial(new Color(.73, .73, .73));
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var green = new LambertianMaterial(new Color(.12, .45, .15));
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var light = new DiffuseLight(new Color(15.0, 15.0, 15.0));
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return new Example(
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new Scene(
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new Parallelogram(new Vec3(555, 0, 0), new Vec3(0, 555, 0), new Vec3(0, 0, 555), green),
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new Parallelogram(new Vec3(0, 0, 0), new Vec3(0, 555, 0), new Vec3(0, 0, 555), red),
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new Parallelogram(new Vec3(343, 554, 332), new Vec3(-130, 0, 0), new Vec3(0, 0, -105), light),
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new Parallelogram(new Vec3(0, 0, 0), new Vec3(555, 0, 0), new Vec3(0, 0, 555), white),
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new Parallelogram(new Vec3(555, 555, 555), new Vec3(-555, 0, 0), new Vec3(0, 0, -555), white),
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new Parallelogram(new Vec3(0, 0, 555), new Vec3(555, 0, 0), new Vec3(0, 555, 0), white),
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Hittables.box(new Vec3(0, 0, 0), new Vec3(165, 330, 165), white).rotateY(Math.toRadians(15)).translate(new Vec3(265, 0, 295)),
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Hittables.box(new Vec3(0, 0, 0), new Vec3(165, 165, 165), white).rotateY(Math.toRadians(-18)).translate(new Vec3(130, 0, 65))
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),
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SimpleCamera.builder()
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.withImage(height, height)
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.withFieldOfView(Math.toRadians(40))
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.withPosition(new Vec3(278, 278, -800))
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.withTarget(new Vec3(278, 278, 0))
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.build()
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);
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}
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public static @NotNull Example getCornellBoxSmoke(int height) {
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if (height <= 0) height = 600;
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var red = new LambertianMaterial(new Color(.65, .05, .05));
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var white = new LambertianMaterial(new Color(.73, .73, .73));
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var green = new LambertianMaterial(new Color(.12, .45, .15));
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var light = new DiffuseLight(new Color(7.0, 7.0, 7.0));
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return new Example(
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new Scene(
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new Parallelogram(new Vec3(555, 0, 0), new Vec3(0, 555, 0), new Vec3(0, 0, 555), green),
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new Parallelogram(new Vec3(0, 0, 0), new Vec3(0, 555, 0), new Vec3(0, 0, 555), red),
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new Parallelogram(new Vec3(113, 554, 127), new Vec3(330, 0, 0), new Vec3(0, 0, 305), light),
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new Parallelogram(new Vec3(0, 0, 0), new Vec3(555, 0, 0), new Vec3(0, 0, 555), white),
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new Parallelogram(new Vec3(555, 555, 555), new Vec3(-555, 0, 0), new Vec3(0, 0, -555), white),
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new Parallelogram(new Vec3(0, 0, 555), new Vec3(555, 0, 0), new Vec3(0, 555, 0), white),
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new ConstantMedium(
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Hittables.box(new Vec3(0, 0, 0), new Vec3(165, 330, 165), white).rotateY(Math.toRadians(15)).translate(new Vec3(265, 0, 295)),
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0.01, new IsotropicMaterial(Color.BLACK)
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),
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new ConstantMedium(
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Hittables.box(new Vec3(0, 0, 0), new Vec3(165, 165, 165), white).rotateY(Math.toRadians(-18)).translate(new Vec3(130, 0, 65)),
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0.01, new IsotropicMaterial(Color.WHITE)
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)
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),
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SimpleCamera.builder()
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.withImage(height, height)
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.withFieldOfView(Math.toRadians(40))
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.withPosition(new Vec3(278, 278, -800))
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.withTarget(new Vec3(278, 278, 0))
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.build()
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);
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}
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private static @NotNull SkyBox getSkyBox() {
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return SkyBox.gradient(new Color(0.5, 0.7, 1.0), Color.WHITE);
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}
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}
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