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C#-Quelltext

[System.Serializable]
public class WorldPathPair {
    public Transform worldPlane = null;
    public Transform pathPlane = null;
}

public class WorldPathPairs : MonoBehaviour {

    public List<WorldPathPair> worldPathPairs = new List<WorldPathPair>();

    public Transform GetWorldPlane(Transform pathPlane) {
        foreach (WorldPathPair wpr in worldPathPairs) {
            if (wpr.pathPlane ==  pathPlane) {
                return wpr.worldPlane;
            }
        }

        Debug.LogError("Can't find WorldPlane of Pathplane: " + pathPlane);
        return null;
    }
}

C#-Quelltext

public Vector3 TransformWorldToPath(Transform worldPlane, Vector3 worldPoint) {
        //set MappingPlane to the Pos/Rot/Scale of worldPlane
        mappingPlane.position = worldPlane.position;
        mappingPlane.rotation = worldPlane.rotation;
        mappingPlane.localScale = worldPlane.localScale;

        //set MappingPoint of MappingPlane
        mappingPoint.position = worldPoint;
        
        //get the PathPlane of the worldPlane
        Transform pathPlane = GetPathPlane(worldPlane);

        //set MappingPlane to the Pos/Rot/Scale of pathPlane
        mappingPlane.position = pathPlane.position;
        mappingPlane.rotation = pathPlane.rotation;
        mappingPlane.localScale = pathPlane.localScale;

        //return position of point
        return mappingPoint.position;
    }

public Vector3 TransformPathToWorld(Transform pathPlane, Vector3 pathPoint) { /* */ }