feat: added setDirectionVector3D, closes #924

AlmasB · AlmasB · commit b31db7b74ed2 · 2023-01-21T20:46:44.000Z
diff --git a/fxgl-entity/src/main/kotlin/com/almasb/fxgl/entity/components/TransformComponent.kt b/fxgl-entity/src/main/kotlin/com/almasb/fxgl/entity/components/TransformComponent.kt
@@ -340,9 +340,21 @@ class TransformComponent(x: Double, y: Double, angle: Double, scaleX: Double, sc
         rotationY += angle
     }
 
+    /**
+     * Makes this transform look (incl. rotations) at a given [point].
+     * Note that direction3D is updated to approximated and normalised value by calling [setDirectionVector3D].
+     */
     fun lookAt(point: Point3D) {
         val directionToLook = point.subtract(x, y, z)
 
+        setDirectionVector3D(directionToLook)
+    }
+
+    /**
+     * Makes this transform look (incl. rotations) in a given [directionToLook].
+     * Note that direction3D is updated to approximated and normalised [directionToLook].
+     */
+    fun setDirectionVector3D(directionToLook: Point3D) {
         // ignore the Y axis and use XZ as 2D plane
         rotationY = 90 - Math.toDegrees(Math.atan2(directionToLook.z, directionToLook.x))
 
