ClientGraphics Line Width

By Xiaodong Liang

Issue
The default line width is 1 pixel, but for nice highlighting it is necessary to paint the lines with at least 2 pixel width.  Can this be done by API?

Solution

The "LineGraphics" or “LineStripGraphics” provide the properties:

- LineWeight: gets and sets the thickness of this primitive. If LineDefinitionSpace is set to kScreenSpace, this value is defined in pixels. If LineDefinitionSpace is set to kModelSpace, this value is defined in model units (centimeters).

- LineType: gets and sets the line type associated with the primitive - LineScale: gets and sets the line scale applied to this primitive -

LineDefinitionSpace is an enum of line definition space for this primitive. It has 3 values:

Public Enum LineDefinitionSpaceEnum
    kScreenSpace = 49921
    kModelSpace = 49922
    kHybridSpace = 49923
End Enum

The code below creates the line graphics. You can change the three properties to see the effects.

       static void test()

        {

            // assume we have had Inventor application

 

            // get current document

            PartDocument oCurrentDoc =

                _InvApplication.ActiveDocument as

                    PartDocument;

 

            PartComponentDefinition oCompDef = oCurrentDoc.ComponentDefinition;

 

            // add ClientGraphics

            ClientGraphics oClientGraphics = null;

            try

            {

                oClientGraphics = oCompDef.ClientGraphicsCollection["CG_Test"];

                if (oClientGraphics != null)

                {

                    oClientGraphics.Delete();

                }

            }

            catch

            { }

            oClientGraphics = oCompDef.ClientGraphicsCollection.Add("CG_Test");

 

            //add GraphicsDataSets

            GraphicsDataSets oDataSets;

            try

            {

                oDataSets = oCurrentDoc.GraphicsDataSetsCollection["CG_Test"];

                if (oDataSets != null)

                {

                    oDataSets.Delete();

                }

            }

            catch

            { }

 

            oDataSets = oCurrentDoc.GraphicsDataSetsCollection.Add("CG_Test");           

            GraphicsCoordinateSet oCoordSet = oDataSets.CreateCoordinateSet(1);

 

            // add GraphicsNode           

            GraphicsNode oLineNode = oClientGraphics.AddNode(1);

            // add LineGraphics

            LineGraphics oLineSet = oLineNode.AddLineGraphics();

            oLineSet.CoordinateSet = oCoordSet;

 

            TransientGeometry oTG = _InvApplication.TransientGeometry;

 

            oCoordSet.Add(1, oTG.CreatePoint(0, 0, 0));

            oCoordSet.Add(2, oTG.CreatePoint(6, 0, 0));

            oCoordSet.Add(3, oTG.CreatePoint(6, 0, 0));

            oCoordSet.Add(4, oTG.CreatePoint(6, 3, 0));

 

            // set LineDefinitionSpace as screen space

            oLineSet.LineDefinitionSpace = LineDefinitionSpaceEnum.kScreenSpace  ;

            // set lineweight

            oLineSet.LineWeight = 2;

            // set LineType

            oLineSet.LineType = LineTypeEnum.kDashedLineType;

            // set LineScale

            oLineSet.LineScale = 2;

            _InvApplication.ActiveView.Update(); ;

        }