Drawing with linetypes

zebiya · Post by **zebiya** » 20 Jul 2007, 00:03

Hello

Please could you explain a bit about drawing polylines with different linetypes? I'm using CadImport.NET and VB

Thanks!!

Post by **support** » 23 Jul 2007, 15:28

Hello Zebiya,

The following code adds new line type "ISO dash", if it doesn't exists and sets it to all CADLines in the loaded file:

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<font color="blue">Private Sub</font id="blue"> btnAddLType_Click(<font color="blue">ByVal</font id="blue"> sender <font color="blue">As</font id="blue"> System.Object, <font color="blue">ByVal</font id="blue"> e <font color="blue">As</font id="blue"> System.EventArgs) <font color="blue">Handles</font id="blue"> btnAddLType.Click
    <font color="blue">If</font id="blue"> (Me.FCADImage <font color="blue">Is Nothing</font id="blue">) <font color="blue">Then Return
    Me</font id="blue">.FCADImage.UseBufMetafile = <font color="blue">False</font id="blue">
    <font color="blue">Me</font id="blue">.cadPictBox.Invalidate()

    <font color="blue">Dim</font id="blue"> lType <font color="blue">As</font id="blue"> CADLineType

    lType = <font color="blue">Me</font id="blue">.FCADImage.Converter.LTypeByName("ISO dash")
    <font color="blue">If</font id="blue"> (lType <font color="blue">Is Nothing</font id="blue">) <font color="blue">Then</font id="blue">
        lType = <font color="blue">New</font id="blue"> CADLineType
        lType.Name = "ISO dash"
        lType.Lines.Ticks.Add(1.2)
        lType.Lines.Ticks.Add(-0.3)
        <font color="blue">Me</font id="blue">.FCADImage.Converter.LinesByName("ISO dash")
        <font color="blue">Me</font id="blue">.FCADImage.Converter.GetSection(CADImport.ConvSection.LTypes).AddEntity(lType)
    <font color="blue">End If

    Dim</font id="blue"> I <font color="blue">As</font id="blue"> Integer
    <font color="blue">Dim</font id="blue"> entLine <font color="blue">As</font id="blue"> CADLine

    <font color="blue">For</font id="blue"> I = 0 <font color="blue">To</font id="blue"> <font color="blue">Me</font id="blue">.FCADImage.Converter.Entities.Count - 1
    If (TypeOf <font color="blue">Me</font id="blue">.FCADImage.Converter.Entities(I) <font color="blue">Is</font id="blue"> CADLine) <font color="blue">Then</font id="blue">
        entLine = <font color="blue">Me</font id="blue">.FCADImage.Converter.Entities(I)
        entLine.SetLType(lType)
        entLine.LineWeight = 1.4
        <font color="blue">Me</font id="blue">.FCADImage.Converter.Loads(entLine)
    <font color="blue">End If
    Next </font id="blue">I
    <font color="blue">Me</font id="blue">.cadPictBox.Invalidate()
<font color="blue">End Sub</font id="blue">

Sergey.

Please post questions to the forum or write to support@cadsofttools.com

zebiya · Post by **zebiya** » 23 Jul 2007, 20:39

Thank you, Sergey, I realise it is a good and simple example but I was looking for an "explanation".

For instance,
Ñ—what can I do with LType.Pen.DashStyle?
Ñ—Can I make more "complex" linetypes?
Ñ—How?
Ñ—Which are the limits?
Ñ—What does exactely mean LineTypeScale?
Ñ—What are Ticks?

I am sure you will make those things clear for me. I do not need very deep teaching, but just some quick clues to manage linetypes

Thank you very much

Post by **support** » 25 Jul 2007, 17:55

Hello Zebiya!

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Ñ—what can I do with LType.Pen.DashStyle?<hr height="1" noshade id="quote"></blockquote id="quote">
This line does not allows to do anything. CAD Import .NET does not use standard system dash styles.
<blockquote id="quote">quote:<hr height="1" noshade id="quote">Ñ—Can I make more "complex" linetypes?
Ñ—How?
Ñ—Which are the limits?<hr height="1" noshade id="quote"></blockquote id="quote">
Please use the following example:

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<font color="blue">Dim</font id="blue"> lType <font color="blue">As</font id="blue"> CADLineType
lType = <font color="blue">Me</font id="blue">.FCADImage.Converter.LTypeByName("New LineType")
<font color="blue">If</font id="blue"> (lType <font color="blue">Is Nothing</font id="blue">) <font color="blue">Then</font id="blue">
    lType = <font color="blue">New</font id="blue"> CADLineType
    lType.Name = "New LineType"
    lType.Lines.Ticks.Add(5.0)
    lType.Lines.Ticks.Add(-0.5)
    lType.Lines.Ticks.Add(0.1)
    lType.Lines.Ticks.Add(-0.5)
    lType.Lines.Ticks.Add(0.1)
    lType.Lines.Ticks.Add(-0.5)
    lType.Lines.Ticks.Add(0.1)
    lType.Lines.Ticks.Add(-0.5)

    <font color="blue">Me</font id="blue">.FCADImage.Converter.GetSection(CADImport.ConvSection.LTypes).AddEntity(lType)
<font color="blue">End If</font id="blue">

Number of ticks is unlimited.
<blockquote id="quote">quote:<hr height="1" noshade id="quote">Ñ—What are Ticks?<hr height="1" noshade id="quote"></blockquote id="quote">
Ticks define length of dashes and dots and empty spaces between them.
Positive value defines a dash(or dot - dependently on its length).
Negative value defines empty space between dashes (dots).
<blockquote id="quote">quote:<hr height="1" noshade id="quote">Ñ—What does exactely mean LineTypeScale? <hr height="1" noshade id="quote"></blockquote id="quote">
LineTypeScale defines a value which is used for multiplying length of dashes and dots and empty spaces between them.
Currently changing CADLineType.LineTypeScale gives no result. It will be corrected in future versions of the library. Until that we recommend to set this value for entities directly:

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<font color="blue">Dim</font id="blue"> I <font color="blue">As Integer
Dim</font id="blue"> entLine <font color="blue">As</font id="blue"> CADLine

<font color="blue">For</font id="blue"> I = 0 <font color="blue">To Me</font id="blue">.FCADImage.Converter.Entities.Count - 1
    <font color="blue">If</font id="blue"> (<font color="blue">TypeOf Me</font id="blue">.FCADImage.Converter.Entities(I) <font color="blue">Is</font id="blue"> CADLine) <font color="blue">Then</font id="blue">
        entLine = <font color="blue">Me</font id="blue">.FCADImage.Converter.Entities(I)
        entLine.SetLType(lType)
        entLine.LineWeight = 0.6
        entLine.LineTypeScale = 20
        <font color="blue">Me</font id="blue">.FCADImage.Converter.Loads(entLine)
    <font color="blue">End If
Next I</font id="blue">

Sergey

Please post questions to the forum or write to support@cadsofttools.com

zebiya · Post by **zebiya** » 25 Jul 2007, 22:22

Thanks a lot for your help. It is just what I needed

Greetings

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Drawing with linetypes

Drawing with linetypes