Create Variable-pitch Helix Example (C#)

This example shows how to create a variable-pitch helix.

//---------------------------------------------------------
// Preconditions: Verify that the specified part document
// template exists.
//
// Postconditions:
// 1. Creates a variable-pitch helix.
// 2. Examine the graphics area and FeatureManager design
//    tree.
//---------------------------------------------------------
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System;

namespace AddVariablePitchHelixCSharp.csproj
{
    partial class SolidWorksMacro
    {


        public void Main()
        {
            ModelDoc2 swModel = default(ModelDoc2);
            SketchManager swSketchManager = default(SketchManager);
            SketchSegment swSketchSegment = default(SketchSegment);
            FeatureManager swFeatureManager = default(FeatureManager);
            Feature swFeature = default(Feature);
            int errors = 0;
            bool status = false;

            // Create part document
            swModel = (ModelDoc2)swApp.NewDocument("C:\\ProgramData\\SolidWorks\\SOLIDWORKS 2016\\templates\\Part.prtdot", 0, 0, 0);
            swModel = (ModelDoc2)swApp.ActiveDoc;
            swSketchManager = (SketchManager)swModel.SketchManager;
            swFeatureManager = (FeatureManager)swModel.FeatureManager;

            // Sketch a circle
            swSketchSegment = (SketchSegment)swSketchManager.CreateCircle(0.0, 0.0, 0.0, 0.045549, 0.013926, 0.0);

            // Create a variable-pitch helix using the sketched circle
            status = swFeatureManager.InsertVariablePitchHelix(false, true, 1, 4.712388980385);
            status = swFeatureManager.AddVariablePitchHelixFirstPitchAndDiameter(0.053, 0.05382625271268);
            status = swFeatureManager.AddVariablePitchHelixSegment(0.0265, 0.05382625271268, 0.5);
            status = swFeatureManager.AddVariablePitchHelixSegment(0.03975, 0.05382625271268, 0.75);
            status = swFeatureManager.AddVariablePitchHelixSegment(0.046375, 0.05382625271268, 0.875);
            status = swFeatureManager.AddVariablePitchHelixSegment(0.053, 0.05382625271268, 1);
            swFeature = (Feature)swFeatureManager.EndVariablePitchHelix();

        }


        /// <summary>
        /// The SldWorks swApp variable is pre-assigned for you.
        /// </summary>

        public SldWorks swApp;

    }
}