GetPoint Method (MultipatchBuilderEx)

In This Topic

A convenience method to get the MapPoint from the specified patch at the specified point index.

Syntax

C#
Visual Basic (Declaration)

public MapPoint GetPoint( 
   int patchIndex,
   int pointIndex
)

Public Function GetPoint( _
   ByVal patchIndex As Integer, _
   ByVal pointIndex As Integer _
) As MapPoint

Parameters

patchIndex: The patch index. Must be in the range [0, Patches.Count - 1] inclusive.
pointIndex: The point index. Must be in the range [0, Patch.Coords.Count - 1] inclusive.

Exceptions

Exception	Description
System.ArgumentOutOfRangeException	The pointIndex is less than zero or is greater than or equal to the patch point count.

Remarks

If this MultipatchBuilderEx has a spatial reference, then the returned MapPoint will have that spatial reference. One difference between this method and Patch.GetPoint is that the MapPoint returned from this method inherits the attribute awareness from this builder. For example, if the Patch.Ms list is null but this builder HasM property is true, then the returned MapPoint HasM property is true, and it has a default M-value. Another difference is that the MapPoint returned from Patch.GetPoint always has a null spatial reference.

Example

Construct Multipatch from another Multipatch

// create the multipatchBuilderEx object
var builder = new ArcGIS.Core.Geometry.MultipatchBuilderEx(multipatch);

// check some properties
bool hasM = builder.HasM;
bool hasZ = builder.HasZ;
bool hasID = builder.HasID;
bool isEmpty = builder.IsEmpty;
bool hasNormals = builder.HasNormals;

var patches = builder.Patches;
int patchCount = patches.Count;

// if there's some patches
if (patchCount > 0)
{
  int pointCount = builder.GetPatchPointCount(0);

  // replace the first point in the first patch
  if (pointCount > 0)
  {
    // get the first point
    var pt = builder.GetPoint(0, 0);
    builder.SetPoint(0, 0, newPoint);
  }

  // check which patches currently contain the texture
  var texture = builder.QueryPatchIndicesWithTexture(brickTextureResource);

  // assign a texture material
  patches[0].Material = brickMaterialTexture;
}

// update the builder for M awareness
builder.HasM = true;
// synchronize the patch attributes to match the builder attributes
//   in this instance because we just set HasM to true on the builder, each patch will now get a default M value for it's set of coordinates
builder.SynchronizeAttributeAwareness();

// call ToGeometry to get the multipatch
multipatch = builder.ToGeometry() as Multipatch;

// multipatch.HasM will be true

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

MultipatchBuilderEx Class
MultipatchBuilderEx Members

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