mateovidro wrote at 2012-04-13 22:48:

Hi all,

  Good job, I am new to the development and started with WPF in C #, I can create a small application and export .obj files but:

  1. When loading a file. obj will change the texture Helixviewport3d blue. Where I can change to white by default?

  2. When I load the obj. of Viewport3D. What is the best way to save the file, some text and some trace of the line? (Access, SQL, compact, etc)

3. Where do I get an example to make this data link (code) ?



  Thanks for the help

  Novice

objo wrote at 2012-04-14 00:23:

1. The ObjReader class has a property DefaultColor where you can set the color of elements that don't have materials assigned.

The ObjExporter should export the materials defined in your Model3D. I think it supports all kinds of materials, for complex materials (e.g. gradients) it will export an image file.

2. Currently the ObjExporter only supports writing to files (the .obj itself could be written to a stream, but it also needs to write material files...) If you just need to persist your model - try serializing the Xaml of the Viewport3D (see the XamlExporter class).

3. Sorry, I have not planned examples with databases in this library.

mateovidro wrote at 2012-04-14 14:20:

Thanks Objo i'm really grateful
for your help

mateovidro wrote at 2012-12-07 00:59:

Hi, objo

I already Viewport3D serialize XAML at runtime. I try to show my models in a simple application,

 I just want to save and load models with some additional text. This is my code :(btn events)

private void button1_Click(object sender, RoutedEventArgs e)
{
    Viewport3D viewport = this.view1.Viewport;
    object obj = viewport;

    FileStream fs = new FileStream(@"C:\test.txt", FileMode.Create, FileAccess.Write);
    string savedview = XamlWriter.Save(obj);

    byte[] byts = System.Text.ASCIIEncoding.ASCII.GetBytes(savedview);

    fs.Write(byts,0 ,byts.Length);

    fs.Close();
   
}

private void button2_Click(object sender, RoutedEventArgs e)
{
    FileStream fs = new FileStream(@"C:\Users\MateoLab\Documents\test.txt", FileMode.Open, FileAccess.Read);
   
    Viewport3D vp = XamlReader.Load(fs) as Viewport3D;
    //Move the child visuals to a temporary collection.
    List<Visual3D> items = new List<Visual3D>();
    foreach (Visual3D visual in vp.Children)
    {
        items.Add(visual);
    }

    //"Detach" the visuals from the original parent.
    vp.Children.Clear();

    //Now, put it in the destination viewport.
    foreach (var item in items)
    {
        view1.Children.Add(item);
    }
    
    }

zbw911 wrote at 2013-08-21 11:01:

   <h:HelixViewport3D x:Name="view1" CameraMode="Inspect" CameraRotationMode="Trackball" ModelUpDirection="0,1,0">
    <h:DefaultLights/>
    <h:CuttingPlaneGroup x:Name="cuttingGroup1" IsEnabled="True">
        <h:CuttingPlaneGroup.CuttingPlanes>
            <!--<h:Plane3D Normal="-1,-1,0"/>-->
            <h:Plane3D Normal="0.6149556716972341,-0.6228702238113956,-0.48359301704692287"/>                                <!--</h:CuttingPlaneGroup.CuttingPlanes>-->
        <h:FileModelVisual3D x:Name="model1" Source="Source/HelixToolkit.Wpf.Tests/Models/obj/cornell_box.obj"/>

    </h:CuttingPlaneGroup>
   </h:HelixViewport3D>

zbw911 wrote at 2013-08-23 02:59:

objo wrote at 2013-09-05 08:08:

eonxxx wrote at 2014-03-06 22:48:

<layer1>
    <model1/>
    <model2/>
    <model3/>
</layer1>
<layer2>
    <model4/>
    <model5/>
    <model6/>
</layer2>
<layer3>
    <model7/>
    <model8/>
    <model9/>
</layer3>

Lolipedobear wrote at 2014-03-07 07:09:

eonxxx wrote at 2014-03-07 19:57:

caffeine31 wrote at 2014-08-17 03:29:

objo wrote at 2014-08-18 13:26:

lizichao wrote at 2011-12-14 03:02:

Hello,I wonder how set antialiasing effect of the ScreenSpaceLines3D object.Thanks for your time and Helix 3D Toolkit is so great!

objo wrote at 2011-12-14 08:39:

We cannot set antialiasing hints in WPF3D as far as I know (I guess you compare to GL_POLYGON_SMOOTH/GL_LINE_SMOOTH in OpenGL or D3D multi-sampling) 

Elemental wrote at 2011-12-15 14:25:

AntiAliasing gets activated automatically if you have proper hardware and Vista or Win 7.

As far as I know, there is no WPF AntiAliasing on WindowsXP.

Have a look at this post:

http://geekswithblogs.net/JeffFerguson/archive/2010/02/05/wpf-rendering-tier-requirements-and-capabilities.aspx

lizichao wrote at 2011-12-16 00:44:

Elemental wrote:

AntiAliasing gets activated automatically if you have proper hardware and Vista or Win 7.

As far as I know, there is no WPF AntiAliasing on WindowsXP.

 

Have a look at this post:

http://geekswithblogs.net/JeffFerguson/archive/2010/02/05/wpf-rendering-tier-requirements-and-capabilities.aspx

Ok, thanks.We cannot decide the hardware of other computer so i give up.

objo wrote at 2011-12-19 09:20:

I have used the following registry setting to enable antialiasing in XP

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Avalon.Graphics]
"MaxMultisampleType"=dword:00000004

Maybe the same setting can be used to disable antialiasing in Vista/7 (not tested)

christianw42 wrote at 2013-03-12 15:27:

maruf_bd wrote at 2013-07-25 07:06:

CodeWithMe wrote at 2013-07-25 14:25:

mcrxb wrote at 2012-02-09 13:57:

Is there a method or property that I can use to set the camera to up after I zoom extents (which causes the camera to rotate based on the bounding box)?

mcrxb wrote at 2012-02-09 14:26:

After reviewing the UpDirection demo I was able to get this to work. Thanks for the great toolkit.

BarrelNut wrote at 2014-05-09 15:43: