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[API-8] Add direction methods on Entity and Living #2139

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Merged
Zidane merged 2 commits into from
Jul 1, 2020
Merged

[API-8] Add direction methods on Entity and Living #2139

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cb2ab4e
Add Entity#getDirection and Living#getHeadDirection
ItsDoot Jun 30, 2020
8cdfa93
Quick before Zidane yells at me
ItsDoot Jul 1, 2020
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12 changes: 12 additions & 0 deletions src/main/java/org/spongepowered/api/entity/Entity.java
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Original file line number Diff line number Diff line change
Expand Up @@ -46,7 +46,9 @@
import org.spongepowered.api.world.World;
import org.spongepowered.api.world.schematic.Schematic;
import org.spongepowered.api.world.server.ServerWorld;
import org.spongepowered.math.imaginary.Quaterniond;
import org.spongepowered.math.vector.Vector3d;
import org.spongepowered.math.vector.Vector3i;

import java.util.Collection;
import java.util.EnumSet;
Expand Down Expand Up @@ -157,6 +159,16 @@ default boolean setLocationSafely(ServerLocation location) {
*/
void setRotation(Vector3d rotation);

/**
* Gets the unit vector representing the direction of this entity.
*
* @return The direction
*/
default Vector3d getDirection() {
final Vector3d rotation = this.getRotation();
return Quaterniond.fromAxesAnglesDeg(rotation.getX(), -rotation.getY(), rotation.getZ()).getDirection();
}

/**
* Moves the entity to the specified location and sets the rotation.
*
Expand Down
11 changes: 11 additions & 0 deletions src/main/java/org/spongepowered/api/entity/living/Living.java
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Expand Up @@ -31,6 +31,7 @@
import org.spongepowered.api.entity.Entity;
import org.spongepowered.api.projectile.source.EntityProjectileSource;
import org.spongepowered.api.scoreboard.TeamMember;
import org.spongepowered.math.imaginary.Quaterniond;
import org.spongepowered.math.vector.Vector3d;

import java.util.Optional;
Expand Down Expand Up @@ -91,4 +92,14 @@ default Optional<Value.Immutable<Double>> lastDamageReceived() {
* @param targetPos Position to target
*/
void lookAt(Vector3d targetPos);

/**
* Converts the {@link Living}'s head rotation into a quaternion direction unit vector.
*
* @return The direction of the head
*/
default Vector3d getHeadDirection() {
final Vector3d headRotation = this.headRotation().get();
return Quaterniond.fromAxesAnglesDeg(headRotation.getX(), -headRotation.getY(), headRotation.getZ()).getDirection();
}
}