source: branches/HeuristicLab.Problems.GaussianProcessTuning/ILNumerics.2.14.4735.573/Functions/builtin/pol2cart.cs @ 10355

///
///    This file is part of ILNumerics Community Edition.
///
///    ILNumerics Community Edition - high performance computing for applications.
///    Copyright (C) 2006 - 2012 Haymo Kutschbach, http://ilnumerics.net
///
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///    it under the terms of the GNU General Public License version 3 as published by
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///    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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///    You should have received a copy of the GNU General Public License
///    along with ILNumerics Community Edition. See the file License.txt in the root
///    of your distribution package. If not, see <http://www.gnu.org/licenses/>.
///
///    In addition this software uses the following components and/or licenses: 
///
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///    Copyright (c) 2006 - 2009 the Open Toolkit library.
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ILNumerics {

    public partial class ILMath {
        /// <summary>
        /// Transform polar/ cylindrical coordinates into scalar coordinates
        /// </summary>
        /// <param name="theta">Angle to x axis</param>
        /// <param name="radius">Radius from z axis</param>
        /// <param name="Z">Height</param>
        /// <param name="outY">If on entry not null, the Y components are returned in outY</param>
        /// <param name="outZ">If on entry not null, the Z components are returned in outZ</param>
        /// <returns>X component, Y and Z are returned as out parameter if requested</returns>
        /// <remarks>Theta, radius and Z must be of the same size or either one may be scalar. 
        /// Scalar coordinate arrays returned are of the same size then the input arrays.</remarks>
        public static ILRetArray<double> pol2cart(ILInArray<double> theta, ILInArray<double> radius, ILInArray<double> Z
                                                   ,ILOutArray<double> outY, ILOutArray<double> outZ) {
            using (ILScope.Enter(theta, radius, Z)) {
                if (!object.Equals(outY,null))
                    outY.a = radius * sin(theta); 
                if (!object.Equals(outZ,null))
                    outZ.a = Z.C; 
                return radius * cos(theta); 
            }
        }

        /// <summary>
        /// Transform polar/ cylindrical coordinates into scalar coordinates
        /// </summary>
        /// <param name="theta">Angle to x axis</param>
        /// <param name="radius">Radius from z axis</param>
        /// <param name="Z">Height</param>
        /// <param name="outY">If on entry not null, the Y components are returned in outY</param>
        /// <param name="outZ">If on entry not null, the Z components are returned in outZ</param>
        /// <returns>X component, Y and Z are returned as out parameter if requested</returns>
        /// <remarks>Theta, radius and Z must be of the same size or either one may be scalar. 
        /// Scalar coordinate arrays returned are of the same size then the input arrays.</remarks>
        public static ILRetArray<float> pol2cart( ILInArray<float> theta, ILInArray<float> radius, ILInArray<float> Z
                                                   , ILOutArray<float> outY, ILOutArray<float> outZ) {
            using (ILScope.Enter(theta, radius, Z)) {
                if (!object.Equals(outY, null))
                    outY.a = radius * sin(theta);
                if (!object.Equals(outZ, null))
                    outZ.a = Z.C;
                return radius * cos(theta);
            }
        }

    }
}