Add Keys.MATRIX

Author: aromaa

src/main/java/org/spongepowered/api/data/Keys.java

@@ -284,6 +284,7 @@
 import org.spongepowered.api.world.weather.Weather;
 import org.spongepowered.api.world.weather.WeatherType;
 import org.spongepowered.api.world.weather.WeatherTypes;
+import org.spongepowered.math.matrix.Matrix4d;
 import org.spongepowered.math.vector.Vector2i;
 import org.spongepowered.math.vector.Vector3d;
 import org.spongepowered.math.vector.Vector3i;
@@ -2287,6 +2288,11 @@ public final class Keys {
      */
     public static final Key<Value<ResourceKey>> MAP_WORLD = Keys.key(ResourceKey.sponge("map_world"), ResourceKey.class);
 
+    /**
+     * The {@link Matrix4d} of a {@link DisplayEntity}
+     */
+    public static final Key<Value<Matrix4d>> MATRIX = Keys.key(ResourceKey.sponge("matrix"), Matrix4d.class);
+
     /**
      * The matter state of a {@link BlockState}
      * Readonly

src/main/java/org/spongepowered/api/entity/display/DisplayEntity.java

@@ -28,6 +28,7 @@
 import org.spongepowered.api.entity.Entity;
 import org.spongepowered.api.util.Ticks;
 import org.spongepowered.api.util.Transform;
+import org.spongepowered.math.matrix.Matrix4d;
 
 import java.util.Optional;
 
@@ -125,6 +126,15 @@ default Double viewRange() {
         return this.require(Keys.VIEW_RANGE);
     }
 
+    /**
+     * Returns the matrix.
+     *
+     * @return the matrix.
+     */
+    default Matrix4d matrix() {
+        return this.require(Keys.MATRIX);
+    }
+
     // TODO bounding box (maybe BASE_SIZE if this is not smth. else in the entity)
     // TODO glow_color_override -1 = use team color