// Copyright 2012 ESRI
// 
// All rights reserved under the copyright laws of the United States
// and applicable international laws, treaties, and conventions.
// 
// You may freely redistribute and use this sample code, with or
// without modification, provided you include the original copyright
// notice and use restrictions.
// 
// See the use restrictions.
// 

using ESRI.ArcGIS.Geometry;
using System;

namespace MultiPatchExamples
{
    public static class TriangleFanExamples
    {
        private static object _missing = Type.Missing;

        public static IGeometry GetExample1()
        {
            //TriangleFan: Square Lying On XY Plane, Z < 0

            IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();

            IPointCollection triangleFanPointCollection = new TriangleFanClass();

            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, -5), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, -5), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 6, -5), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, 6, -5), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, -6, -5), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, -5), ref _missing, ref _missing);

            multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);

            return multiPatchGeometryCollection as IGeometry;
        }

        public static IGeometry GetExample2()
        {
            //TriangleFan: Upright Square

            IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();

            IPointCollection triangleFanPointCollection = new TriangleFanClass();

            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 0), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, 0, -5), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, 0, 5), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(5, 0, 5), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(5, 0, -5), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, 0, -5), ref _missing, ref _missing);

            multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);

            return multiPatchGeometryCollection as IGeometry;
        }

        public static IGeometry GetExample3()
        {
            //TriangleFan: Square Based Pyramid

            IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();

            IPointCollection triangleFanPointCollection = new TriangleFanClass();

            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 7), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, 0), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 6, 0), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, 6, 0), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, -6, 0), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, 0), ref _missing, ref _missing);

            multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);

            return multiPatchGeometryCollection as IGeometry;
        }

        public static IGeometry GetExample4()
        {
            //TriangleFan: Triangle Based Pyramid

            IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();

            IPointCollection triangleFanPointCollection = new TriangleFanClass();

            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 6), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(3), -3, 0), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 6, 0), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(3 * Math.Sqrt(3), -3, 0), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(3), -3, 0), ref _missing, ref _missing);

            multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);

            return multiPatchGeometryCollection as IGeometry;
        }

        public static IGeometry GetExample5()
        {
            //TriangleFan: Alternating Fan

            IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();

            IPointCollection triangleFanPointCollection = new TriangleFanClass();

            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 0), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, -6, 3), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(2), -3 * Math.Sqrt(2), -3), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 0, 3), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(2), 3 * Math.Sqrt(2), -3), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 6, 3), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(3 * Math.Sqrt(2), 3 * Math.Sqrt(2), -3), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, 0, 3), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(3 * Math.Sqrt(2), -3 * Math.Sqrt(2), -3), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, -6, 3), ref _missing, ref _missing);

            multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);

            return multiPatchGeometryCollection as IGeometry;
        }

        public static IGeometry GetExample6()
        {
            //TriangleFan: Partial Fan, Two Levels Of Zs

            IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();

            IPointCollection triangleFanPointCollection = new TriangleFanClass();

            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 3), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, -6, 3), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(2), -3 * Math.Sqrt(2), 3), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 0, 3), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(2), 3 * Math.Sqrt(2), 0), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 6, 0), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(3 * Math.Sqrt(2), 3 * Math.Sqrt(2), 0), ref _missing, ref _missing);
            triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, 0, 0), ref _missing, ref _missing);

            multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);

            return multiPatchGeometryCollection as IGeometry;
        }
    }
}