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GeometryUtility.cs
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GeometryUtility.cs
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//-----------------------------------------------------------------------
// <copyright file="GeometryUtility.cs" company="Studio A&T s.r.l.">
// Copyright (c) Studio AT s.r.l. All rights reserved.
// </copyright>
// <author>Nicogis</author>
//-----------------------------------------------------------------------
namespace Studioat.ArcGis.Soe.Rest
{
using System;
using System.Diagnostics.CodeAnalysis;
using ESRI.ArcGIS.Geometry;
[SuppressMessage("Microsoft.StyleCop.CSharp.NamingRules", "SA1305:FieldNamesMustNotUseHungarianNotation", Justification = "Warning StyleCop - zAware")]
/// <summary>
/// class GeometryUtility
/// </summary>
internal static class GeometryUtility
{
/// <summary>
/// object missing
/// </summary>
private static object missing = Type.Missing;
/// <summary>
/// create a ZAware
/// </summary>
/// <param name="geometry">object geometry</param>
public static void MakeZAware(IGeometry geometry)
{
IZAware zAware = geometry as IZAware;
zAware.ZAware = true;
}
/// <summary>
/// create a Vector3D from components
/// </summary>
/// <param name="componentX">component X</param>
/// <param name="componentY">component Y</param>
/// <param name="componentZ">component Z</param>
/// <returns>object Vector 3D</returns>
public static IVector3D ConstructVector3D(double componentX, double componentY, double componentZ)
{
IVector3D vector3D = new Vector3DClass();
vector3D.SetComponents(componentX, componentY, componentZ);
return vector3D;
}
/// <summary>
/// convert decimal degrees in radians
/// </summary>
/// <param name="decimalDegrees">decimal degrees</param>
/// <returns>number in radians</returns>
public static double GetRadians(double decimalDegrees)
{
return decimalDegrees * (Math.PI / 180);
}
/// <summary>
/// Construct point 3D
/// </summary>
/// <param name="x">coordinate X</param>
/// <param name="y">coordinate Y</param>
/// <param name="z">coordinate Z</param>
/// <returns>object Point 3D</returns>
public static IPoint ConstructPoint3D(double x, double y, double z)
{
IPoint point = ConstructPoint2D(x, y);
point.Z = z;
MakeZAware(point as IGeometry);
return point;
}
/// <summary>
/// Construct point 2D
/// </summary>
/// <param name="x">coordinate X</param>
/// <param name="y">coordinate Y</param>
/// <returns>object Point 2D</returns>
public static IPoint ConstructPoint2D(double x, double y)
{
IPoint point = new PointClass();
point.X = x;
point.Y = y;
return point;
}
/// <summary>
/// Construct multi patch outline
/// </summary>
/// <param name="multiPatchGeometry">multi patch geometry</param>
/// <returns>object implements IGeometryCollection</returns>
public static IGeometryCollection ConstructMultiPatchOutline(IGeometry multiPatchGeometry)
{
IGeometryCollection outlineGeometryCollection = new GeometryBagClass();
IGeometryCollection multiPatchGeometryCollection = multiPatchGeometry as IGeometryCollection;
for (int i = 0; i < multiPatchGeometryCollection.GeometryCount; i++)
{
IGeometry geometry = multiPatchGeometryCollection.get_Geometry(i);
switch (geometry.GeometryType)
{
case esriGeometryType.esriGeometryTriangleStrip:
outlineGeometryCollection.AddGeometryCollection(ConstructTriangleStripOutline(geometry));
break;
case esriGeometryType.esriGeometryTriangleFan:
outlineGeometryCollection.AddGeometryCollection(ConstructTriangleFanOutline(geometry));
break;
case esriGeometryType.esriGeometryTriangles:
outlineGeometryCollection.AddGeometryCollection(ConstructTrianglesOutline(geometry));
break;
case esriGeometryType.esriGeometryRing:
outlineGeometryCollection.AddGeometry(ConstructRingOutline(geometry), ref missing, ref missing);
break;
default:
throw new Exception("Unhandled Geometry Type. " + geometry.GeometryType);
}
}
return outlineGeometryCollection;
}
/// <summary>
/// Construct triangle strip outline
/// </summary>
/// <param name="triangleStripGeometry">object triangle strip geometry</param>
/// <returns>triangle strip outline</returns>
public static IGeometryCollection ConstructTriangleStripOutline(IGeometry triangleStripGeometry)
{
IGeometryCollection outlineGeometryCollection = new GeometryBagClass();
IPointCollection triangleStripPointCollection = triangleStripGeometry as IPointCollection;
// TriangleStrip: a linked strip of triangles, where every vertex (after the first two) completes a new triangle.
// A new triangle is always formed by connecting the new vertex with its two immediate predecessors.
for (int i = 2; i < triangleStripPointCollection.PointCount; i++)
{
IPointCollection outlinePointCollection = new PolylineClass();
outlinePointCollection.AddPoint(triangleStripPointCollection.get_Point(i - 2), ref missing, ref missing);
outlinePointCollection.AddPoint(triangleStripPointCollection.get_Point(i - 1), ref missing, ref missing);
outlinePointCollection.AddPoint(triangleStripPointCollection.get_Point(i), ref missing, ref missing);
// Simulate: Polygon.Close
outlinePointCollection.AddPoint(triangleStripPointCollection.get_Point(i - 2), ref missing, ref missing);
IGeometry outlineGeometry = outlinePointCollection as IGeometry;
MakeZAware(outlineGeometry);
outlineGeometryCollection.AddGeometry(outlineGeometry, ref missing, ref missing);
}
return outlineGeometryCollection;
}
/// <summary>
/// Construct triangle fan outline
/// </summary>
/// <param name="triangleFanGeometry">triangle fan geometry</param>
/// <returns>object implements IGeometryCollection</returns>
public static IGeometryCollection ConstructTriangleFanOutline(IGeometry triangleFanGeometry)
{
IGeometryCollection outlineGeometryCollection = new GeometryBagClass();
IPointCollection triangleFanPointCollection = triangleFanGeometry as IPointCollection;
// TriangleFan: a linked fan of triangles, where every vertex (after the first two) completes a new triangle.
// A new triangle is always formed by connecting the new vertex with its immediate predecessor
// and the first vertex of the part.
for (int i = 2; i < triangleFanPointCollection.PointCount; i++)
{
IPointCollection outlinePointCollection = new PolylineClass();
outlinePointCollection.AddPoint(triangleFanPointCollection.get_Point(0), ref missing, ref missing);
outlinePointCollection.AddPoint(triangleFanPointCollection.get_Point(i - 1), ref missing, ref missing);
outlinePointCollection.AddPoint(triangleFanPointCollection.get_Point(i), ref missing, ref missing);
// Simulate: Polygon.Close
outlinePointCollection.AddPoint(triangleFanPointCollection.get_Point(0), ref missing, ref missing);
IGeometry outlineGeometry = outlinePointCollection as IGeometry;
MakeZAware(outlineGeometry);
outlineGeometryCollection.AddGeometry(outlineGeometry, ref missing, ref missing);
}
return outlineGeometryCollection;
}
/// <summary>
/// Construct triangles outline
/// </summary>
/// <param name="trianglesGeometry">triangles geometry</param>
/// <returns>object implements IGeometryCollection</returns>
public static IGeometryCollection ConstructTrianglesOutline(IGeometry trianglesGeometry)
{
IGeometryCollection outlineGeometryCollection = new GeometryBagClass();
IPointCollection trianglesPointCollection = trianglesGeometry as IPointCollection;
// Triangles: an unlinked set of triangles, where every three vertices completes a new triangle.
if ((trianglesPointCollection.PointCount % 3) != 0)
{
throw new Exception("Triangles Geometry Point Count Must Be Divisible By 3. " + trianglesPointCollection.PointCount);
}
else
{
for (int i = 0; i < trianglesPointCollection.PointCount; i += 3)
{
IPointCollection outlinePointCollection = new PolylineClass();
outlinePointCollection.AddPoint(trianglesPointCollection.get_Point(i), ref missing, ref missing);
outlinePointCollection.AddPoint(trianglesPointCollection.get_Point(i + 1), ref missing, ref missing);
outlinePointCollection.AddPoint(trianglesPointCollection.get_Point(i + 2), ref missing, ref missing);
// Simulate: Polygon.Close
outlinePointCollection.AddPoint(trianglesPointCollection.get_Point(i), ref missing, ref missing);
IGeometry outlineGeometry = outlinePointCollection as IGeometry;
MakeZAware(outlineGeometry);
outlineGeometryCollection.AddGeometry(outlineGeometry, ref missing, ref missing);
}
}
return outlineGeometryCollection;
}
/// <summary>
/// Construct ring outline
/// </summary>
/// <param name="ringGeometry">ring Geometry</param>
/// <returns>object implements Geometry</returns>
public static IGeometry ConstructRingOutline(IGeometry ringGeometry)
{
IGeometry outlineGeometry = new PolylineClass();
IPointCollection outlinePointCollection = outlineGeometry as IPointCollection;
IPointCollection ringPointCollection = ringGeometry as IPointCollection;
for (int i = 0; i < ringPointCollection.PointCount; i++)
{
outlinePointCollection.AddPoint(ringPointCollection.get_Point(i), ref missing, ref missing);
}
// Simulate: Polygon.Close
outlinePointCollection.AddPoint(ringPointCollection.get_Point(0), ref missing, ref missing);
MakeZAware(outlineGeometry);
return outlineGeometry;
}
}
}