ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / Layer Class / SetDefinition Method
ArcGIS.Core.CIM.CIMBaseLayer
Example Version

SetDefinition Method (Layer)
Updates the layer's CIM definition. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public void SetDefinition( 
   CIMBaseLayer baseLayer
)

Parameters

baseLayer
ArcGIS.Core.CIM.CIMBaseLayer
Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run.
Example
Hide or show editing tools on templates
QueuedTask.Run(() =>
{
  //hide all tools except line tool on layer
  var featLayer = MapView.Active.Map.FindLayers("Roads").First();

  var editTemplates = featLayer.GetTemplates();
  var newCIMEditingTemplates = new List<CIMEditingTemplate>();

  foreach (var et in editTemplates)
  {
    //initialize template by activating default tool
    et.ActivateDefaultToolAsync();
    var cimEditTemplate = et.GetDefinition();
    //get the visible tools on this template
    var allTools = et.ToolIDs.ToList();
    //add the hidden tools on this template
    allTools.AddRange(cimEditTemplate.GetExcludedToolIDs().ToList());
    //hide all the tools then allow the line tool
  
    //At 2.x -
    //allTools.AddRange(cimEditTemplate.GetExcludedToolDamlIds().ToList());
    allTools.AddRange(cimEditTemplate.GetExcludedToolIDs().ToList());
    
    //At 2.x - 
    //cimEditTemplate.SetExcludedToolDamlIds(allTools.ToArray());
    //cimEditTemplate.AllowToolDamlID("esri_editing_SketchLineTool");
    
    cimEditTemplate.SetExcludedToolIDs(allTools.ToArray());
    cimEditTemplate.AllowToolID("esri_editing_SketchLineTool");
    newCIMEditingTemplates.Add(cimEditTemplate);
  }
  //update the layer templates
  var layerDef = featLayer.GetDefinition() as CIMFeatureLayer;
  // Set AutoGenerateFeatureTemplates to false for template changes to stick
  layerDef.AutoGenerateFeatureTemplates = false;
  layerDef.FeatureTemplates = newCIMEditingTemplates.ToArray();
  featLayer.SetDefinition(layerDef);
});
Edit Color Modulation
//Must be called on the MCT
//var pcsl = ...;
var def = pcsl.GetDefinition() as CIMPointCloudLayer;
//Get the ColorModulation off the renderer
var modulation = def.Renderer.ColorModulation;
if (modulation == null)
  modulation = new CIMColorModulationInfo();
//Set the minimum and maximum intensity as needed
modulation.MinValue = 0;
modulation.MaxValue = 100.0;
//apply back
def.Renderer.ColorModulation = modulation;
//Commit changes back to the CIM
pcsl.SetDefinition(def);
Edit The Renderer to use Fixed Size
//Must be called on the MCT
//var pcsl = ...;
var def = pcsl.GetDefinition() as CIMPointCloudLayer;

//Set the point shape and sizing on the renderer
def.Renderer.PointShape = PointCloudShapeType.DiskShaded;
var pointSize = new CIMPointCloudFixedSizeAlgorithm()
{
  UseRealWorldSymbolSizes = false,
  Size = 8
};
def.Renderer.PointSizeAlgorithm = pointSize;
//Commit changes back to the CIM
pcsl.SetDefinition(def);
Edit the Renderer to Scale Size
//Must be called on the MCT
//var pcsl = ...;
var def = pcsl.GetDefinition() as CIMPointCloudLayer;

//Set the point shape and sizing on the renderer
def.Renderer.PointShape = PointCloudShapeType.DiskFlat;//default
var scaleSize = new CIMPointCloudSplatAlgorithm()
{
  MinSize = 8,
  ScaleFactor = 1.0 //100%
};
def.Renderer.PointSizeAlgorithm = scaleSize;
//Commit changes back to the CIM
pcsl.SetDefinition(def);
Edit Density settings
//Must be called on the MCT
//var pcsl = ...;
var def = pcsl.GetDefinition() as CIMPointCloudLayer;
//PointsBudget - corresponds to Display Limit on the UI
// - the absolute maximum # of points to display
def.PointsBudget = 1000000;

//PointsPerInch - corresponds to Density Min --- Max on the UI
// - the max number of points per display inch to renderer
def.PointsPerInch = 15;
//Commit changes back to the CIM
pcsl.SetDefinition(def);
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also