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add bounding box to sphere

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This commit is contained in:
jbb01 2024-08-04 23:54:35 +02:00
parent 8b7b99b184
commit a84ed5c050
3 changed files with 24 additions and 0 deletions
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10
src/main/java/eu/jonahbauer/raytracing/math/BoundingBox.java Normal file
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@ -0,0 +1,10 @@
package eu.jonahbauer.raytracing.math;
import org.jetbrains.annotations.NotNull;
public record BoundingBox(@NotNull Vec3 min, @NotNull Vec3 max) {
public @NotNull Vec3 center() {
return Vec3.average(min, max, 2);
}
}

5
src/main/java/eu/jonahbauer/raytracing/scene/Hittable.java
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@ -1,5 +1,6 @@
package eu.jonahbauer.raytracing.scene;
import eu.jonahbauer.raytracing.math.BoundingBox;
import eu.jonahbauer.raytracing.math.Range;
import eu.jonahbauer.raytracing.math.Ray;
import org.jetbrains.annotations.NotNull;
@ -14,4 +15,8 @@ public interface Hittable {
* @param ray a ray
*/
@NotNull Optional<HitResult> hit(@NotNull Ray ray, @NotNull Range range);
default @NotNull Optional<BoundingBox> getBoundingBox() {
return Optional.empty();
}
}

9
src/main/java/eu/jonahbauer/raytracing/scene/Sphere.java
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@ -1,6 +1,7 @@
package eu.jonahbauer.raytracing.scene;
import eu.jonahbauer.raytracing.material.Material;
import eu.jonahbauer.raytracing.math.BoundingBox;
import eu.jonahbauer.raytracing.math.Range;
import eu.jonahbauer.raytracing.math.Ray;
import eu.jonahbauer.raytracing.math.Vec3;
@ -44,6 +45,14 @@ public record Sphere(@NotNull Vec3 center, double radius, @NotNull Material mate
return Optional.of(new HitResult(t, position, frontFace ? normal : normal.times(-1), material, frontFace));
}
@Override
public @NotNull Optional<BoundingBox> getBoundingBox() {
return Optional.of(new BoundingBox(
center.minus(radius, radius, radius),
center.plus(radius, radius, radius)
));
}
public @NotNull Sphere withCenter(@NotNull Vec3 center) {
return new Sphere(center, radius, material);
}