Ejemplo n.º 1
0
        /// <summary>
        /// Scan the sprites to find those that contain the specified position.
        /// Returns an array of all matching sprites.
        /// </summary>
        /// <param name="testPosition"></param>
        public SpriteObject GetSpriteAtPoint(Vector2 testPosition)
        {
            SpriteObject spriteObj;
            SpriteObject ret = null;
            float        lowestLayerDepth = float.MaxValue;

            // Loop for all of the SelectableSpriteObjects
            foreach (GameObjectBase obj in GameObjects)
            {
                // Is this a SpriteObject?
                if (obj is SpriteObject)
                {
                    // Yes... Cast it to a SelectableSpriteObject
                    spriteObj = (SpriteObject)obj;
                    // Is its layerdepth the same or lower than the lowest we have seen so far?
                    // If not, previously encountered objects are in front of this one
                    // and so we have no need to check it.
                    if (spriteObj.LayerDepth <= lowestLayerDepth)
                    {
                        // Is the point in the object?
                        if (spriteObj.IsPointInObject(testPosition))
                        {
                            // Mark this as the current frontmost object
                            // and remember its layerdepth for future checks
                            ret = spriteObj;
                            lowestLayerDepth = spriteObj.LayerDepth;
                        }
                    }
                }
            }

            return(ret);
        }
Ejemplo n.º 2
0
        /// <summary>
        /// Scan the sprites to find those that contain the specified position.
        /// Returns an array of all matching sprites.
        /// </summary>
        /// <param name="testPosition"></param>
        public SpriteObject[] GetSpritesAtPoint(Vector2 testPosition)
        {
            SpriteObject spriteObj;

            SpriteObject[] hits     = new SpriteObject[GameObjects.Count];
            int            hitCount = 0;

            // Loop for all of the SelectableSpriteObjects
            foreach (GameObjectBase obj in GameObjects)
            {
                // Is this a SpriteObject?
                if (obj is SpriteObject)
                {
                    // Yes... Cast it to a SelectableSpriteObject
                    spriteObj = (SpriteObject)obj;
                    // Is the point in the object?
                    if (spriteObj.IsPointInObject(testPosition))
                    {
                        // Add to the array
                        hits[hitCount] = spriteObj;
                        hitCount      += 1;
                    }
                }
            }

            // Trim the empty space from the end of the array
            Array.Resize(ref hits, hitCount);

            return(hits);
        }