Esempio n. 1
0
        /// <summary>
        /// Find element containing (x,y) coordinate. Returns null if no element found.
        /// <para>
        /// If (x,y) is exacly on the boundary between two elements, one of them will be returned.
        /// If (x,y) is matching exacly a node coordinate, one of the elements including the node will be returned.
        /// </para>
        /// </summary>
        public MeshElement FindElement(double x, double y)
        {
            // Find potential elements for (x,y) point
            Envelope targetEnvelope = new Envelope(x, x, y, y);

#if NTS173
            IList potentialSourceElmts = _elementSearchTree.Query(targetEnvelope);
#else
            IList <MeshElement> potentialSourceElmts = _elementSearchTree.Query(targetEnvelope);
#endif

            // Loop over all potential elements
            for (int i = 0; i < potentialSourceElmts.Count; i++)
            {
#if NTS173
                MeshElement element = (MeshElement)potentialSourceElmts[i];
#else
                MeshElement element = potentialSourceElmts[i];
#endif

                // Check if element includes the (x,y) point
                if (element.Includes(x, y))
                {
                    return(element);
                }
            }

            return(null);
        }
Esempio n. 2
0
        /// <summary>
        /// Find element containing (x,y) coordinate. Returns null if no element found.
        /// <para>
        /// If (x,y) is exactly on the boundary between two elements, one of them will be returned.
        /// If (x,y) is matching exacly a node coordinate, one of the elements including the node will be returned.
        /// </para>
        /// </summary>
        public MeshElement FindElement(double x, double y)
        {
            // Find potential elements for (x,y) point
            Envelope targetEnvelope = new Envelope(x, x, y, y);

            IList <MeshElement> potentialSourceElmts = _elementSearchTree.Query(targetEnvelope);

            // Loop over all potential elements
            for (int i = 0; i < potentialSourceElmts.Count; i++)
            {
                MeshElement element = potentialSourceElmts[i];

                // Check if element includes the (x,y) point
                if (element.Includes(x, y))
                {
                    return(element);
                }
            }

            if (Tolerance <= 0)
            {
                return(null);
            }

            // Try again, now with tolerance
            for (int i = 0; i < potentialSourceElmts.Count; i++)
            {
                MeshElement element = potentialSourceElmts[i];

                // Check if element includes the (x,y) point
                if (element.Includes(x, y, Tolerance))
                {
                    return(element);
                }
            }

            return(null);
        }