topic Re: ArcScene: 2D scene export uses OpenGL 1.1 in ArcObjects SDK Questions

ArcScene: 2D scene export uses OpenGL 1.1

SteffenErnst — Sat, 06 Oct 2012 12:40:19 GMT

Hi,

I would like to render geometry with OpenGL 2.0 which works well in ArcScene and ArcGlobe in normal view. Now the geometry should also be drawn in exported screenshots. This works well in ArcGlobe with the export function from file menu. But it doesn???t in ArcScene while using the export to 2D function, because ArcScene uses an OpenGL 1.1 context for image export.

This happens in ArcScene 10.0 and 10.1. C# is used as development language. Is there a way to get an OpenGL 2.0 context also for image export in ArcScene?

Re: ArcScene: 2D scene export uses OpenGL 1.1

tianyuzhang — Sat, 29 Dec 2012 11:40:58 GMT

Hi,SOrry that i can't help you .
i'am using opengl in scenecontrol recently ,i'am wondering how could you canvert a coordinate in map(geographic coordinates) to a coordinate in opengl ?

waiting for your respond...

Re: ArcScene: 2D scene export uses OpenGL 1.1

SteffenErnst — Sat, 29 Dec 2012 12:18:12 GMT

Hi,

this can be done with the function GeographicToGeocentric, as described on this page
http://help.arcgis.com/en/sdk/10.0/arcobjects_net/conceptualhelp/index.html#/How_to_draw_a_geographical_object_on_the_globe_using_direct_OpenGL_plug_in/0001000002vr000000/

Re: ArcScene: 2D scene export uses OpenGL 1.1

tianyuzhang — Sat, 29 Dec 2012 23:09:00 GMT

Hi,

this can be done with the function GeographicToGeocentric, as described on this page
http://help.arcgis.com/en/sdk/10.0/arcobjects_net/conceptualhelp/index.html#/How_to_draw_a_geographical_object_on_the_globe_using_direct_OpenGL_plug_in/0001000002vr000000/

Hi ,DO you know how to enforce the function" GeographicTO geocentric " in the scenecontrol ?Or would you tell me how to convert the geographic to geocentric coordinates in scenecontrol ?

Re: ArcScene: 2D scene export uses OpenGL 1.1

SteffenErnst — Sat, 11 Dec 2021 17:59:06 GMT

Hi,
I use GeographicToGeocentric only in ArcGlobe, sorry for my misleading answer. In ArcScene, I just project my points to the spatial reference of the scene and pass the x- and y-coordinate to OpenGL for drawing.

IGeometry geom = feature.ShapeCopy;
geom.Project(m_sceneHookHelper.Scene.SpatialReference);
IPoint point = geom as IPoint;

GL.glPointSize(15.0f);
GL.glColor3ub(255, 0, 0);
GL.glBegin(GL.GL_POINTS);
GL.glVertex3f((float)point.X, (float)point.Y, (float)0.0);
GL.glEnd();

Re: ArcScene: 2D scene export uses OpenGL 1.1

tianyuzhang — Sat, 11 Dec 2021 17:59:08 GMT

Hi,
I use GeographicToGeocentric only in ArcGlobe, sorry for my misleading answer. In ArcScene, I just project my points to the spatial reference of the scene and pass the x- and y-coordinate to OpenGL for drawing.
IGeometry geom = feature.ShapeCopy;
geom.Project(m_sceneHookHelper.Scene.SpatialReference);
IPoint point = geom as IPoint;

GL.glPointSize(15.0f);
GL.glColor3ub(255, 0, 0);
GL.glBegin(GL.GL_POINTS);
GL.glVertex3f((float)point.X, (float)point.Y, (float)0.0);
GL.glEnd();

hi�?Very appreciate for your answer!! But i still have a question ,i add a raster layer into my application,just like that.
[ATTACH=CONFIG]20340[/ATTACH]

1. now i think i can't use your method ?
2.i found there is a "feature" in your code ,maybe it's useless in my application ?
3.So, how could i make it ? (i just know how to get the points' coordinates in the map(latitude,longtitude) ) . And the height of the point is important for i want to draw something along the terrain.

at last ,i have to say thank you very much.cause i'm a foreigner,can't speak english very well ,so ,just forgive me ...

Re: ArcScene: 2D scene export uses OpenGL 1.1

SteffenErnst — Sat, 11 Dec 2021 17:59:12 GMT

Hi,

You�??re welcome, I understand your English very well.
I think you can use my method. In my application the features are points from a shapefile, but your point coordinates should do fine as well. In case a terrain is loaded, I get the height of a point in ArcScene like that:

ISurface surface = �?�;
double height = surface.GetElevation(point) * surface.ZFactor;

The surface I use is assigned to the shapefile layer, I guess you have already a reference to your terrain. The height can passed as z-coordinate to OpenGL:

GL.glVertex3f((float) point.X, (float) point.Y, (float) height);

Re: ArcScene: 2D scene export uses OpenGL 1.1

tianyuzhang — Sat, 11 Dec 2021 17:59:14 GMT

Hi,

You�??re welcome, I understand your English very well.
I think you can use my method. In my application the features are points from a shapefile, but your point coordinates should do fine as well. In case a terrain is loaded, I get the height of a point in ArcScene like that:
ISurface surface = �?�;
double height = surface.GetElevation(point) * surface.ZFactor;
The surface I use is assigned to the shapefile layer, I guess you have already a reference to your terrain. The height can passed as z-coordinate to OpenGL:
GL.glVertex3f((float) point.X, (float) point.Y, (float) height);

hi,
sorry about diturbing you again and again ...

i have get the height in your method ,but when i pass the point to OpenGL. there is nothing on the screen...

here is my code , i guess there is something wrong happened when i define the point.

[ATTACH=CONFIG]20356[/ATTACH]

wiould you help me have a check ?

In my application , i need to input the point coordinates(which i will draw by OpenGL) from outside,so i pay so much attention to the coordinate, meanwhile , in my opinion,the coordinate system of the layer have loaded may have some influences on drawing when i pass the x- y- z- to OpenGL.Because when i load another layer,i get the coordinate like this
[ATTACH=CONFIG]20357[/ATTACH]

unfortunately, the OpenGL did't works

hoping for your answer , thanks again!

Re: ArcScene: 2D scene export uses OpenGL 1.1

SteffenErnst — Sat, 11 Dec 2021 17:59:17 GMT

Hi,

I think you have to set the right spatial reference after setting the point coordinates and then project it to the reference of the scene.

pt.SpatialReference = layer.SpatialReference;
pt.Project(m_sceneHookHelper.Scene.SpatialReference);

Re: ArcScene: 2D scene export uses OpenGL 1.1

tianyuzhang — Sat, 11 Dec 2021 17:59:20 GMT

Hi,

I think you have to set the right spatial reference after setting the point coordinates and then project it to the reference of the scene.
pt.SpatialReference = layer.SpatialReference;
pt.Project(m_sceneHookHelper.Scene.SpatialReference);

hi,
Thanks for your answer ,i noticed that the spatialreference property in Ilayer and IFeaturelayer is writeonly,

   
    Public RasterLayer As IRasterLayer
    Public lyr As ILayer
   
    lyr = GetLayer(m_pDEMname)
    RasterLayer = CType(lyr, IRasterLayer)

    Private Function GetLayer(ByVal name As String) As ILayer   

        'Dim layer As ILayer

        For i As Integer = 0 To m_pScene.LayerCount - 1

            If m_pScene.Layer(i).Name = name Then
                Return m_pScene.Layer(i)
            End If

        Next

        Return Nothing

    End Function

when i use lyr.spatialrefere or rasterlayer.spatialreference,all can't assign to pt.spatialreference,cause it's write only, so I write the code like that

  Dim pBasicmap As IBasicMap
            'Dim ilayer As ILayer
            
            'ilayer = CType(m_pScenecontrol.CustomProperty, ILayer)
            pBasicmap = CType(m_pScenecontrol.Scene, IBasicMap)
            'pBasicmap.DeleteLayer(ilayer)

            pt.SpatialReference = pBasicmap.SpatialReference
            pt.Project(m_pScenecontrol.Scene.SpatialReference)

but the result still don't change. cause i am a newcomer ,and people around me can't do this either ,so i have to turn to you.please... with all due respect, could tell me your e-mail ,i have so many questions ...Really appreciate!

Re: ArcScene: 2D scene export uses OpenGL 1.1

SteffenErnst — Wed, 02 Jan 2013 10:48:16 GMT

Hi,

this thread describes how to get the spatial reference by casting the layer to an IGeoDataset.
http://forums.esri.com/Thread.asp?c=159&f=1707&t=223709
A ISurface has also a reference in its domain attribute, you can try this too.

pt.SpatialReference = surface.Domain.SpatialReference

I can send you my mail address as private message, but you have to enable it in your forum settings first.

Re: ArcScene: 2D scene export uses OpenGL 1.1

tianyuzhang — Wed, 02 Jan 2013 12:10:53 GMT

Hi,

this thread describes how to get the spatial reference by casting the layer to an IGeoDataset.
http://forums.esri.com/Thread.asp?c=159&f=1707&t=223709
A ISurface has also a reference in its domain attribute, you can try this too.
pt.SpatialReference = surface.Domain.SpatialReference
I can send you my mail address as private message, but you have to enable it in your forum settings first.

Hi,

i have send you a message.

Re: ArcScene: 2D scene export uses OpenGL 1.1

juan_marvinwirjomartono — Sat, 11 Dec 2021 17:59:22 GMT

Hello,

I saw your posts, which really gave me a chance to solve my ArcScene problem. I have a problem to draw objects using OpenGL on the ArcScene view.

I usually work with ArcMap, and never used OpenGL before. So I tried to follow your codes to draw points on ArcScene using OpenGL. I created a form to choose the source layer that also contains a button to run the process. Below is the code for the button _onclick:

Public Sub RefreshView()
        Dim pSxDoc As ISxDocument
        pSxDoc = My.ArcScene.Application.Document
        pSxDoc.Scene.SceneGraph.Invalidate(pSxDoc.Scene.SceneGraph.ActiveViewer, True, True)
        pSxDoc.Scene.SceneGraph.RefreshViewers()
    End Sub

    Private Sub btnRun_Click(sender As System.Object, e As System.EventArgs) Handles btnRun.Click


        Dim pSxDoc As ISxDocument
        pSxDoc = My.ArcScene.Application.Document
        Dim pScene As IScene
        pScene = pSxDoc.Scene
        Dim pLayer As ILayer
        Dim theLayer As String = cboLayer.Text
        pLayer = GetLayer(theLayer)

        Dim theFLayer As IFeatureLayer
        Dim theFClass As IFeatureClass
        theFLayer = pLayer
        theFClass = theFLayer.FeatureClass

        Dim theFeatCursor As IFeatureCursor
        Dim theFeature As IFeature
        theFeatCursor = theFClass.Search(Nothing, False)
        theFeature = theFeatCursor.NextFeature

        While Not theFeature Is Nothing
            Dim geom As IGeometry
            geom = theFeature.ShapeCopy
            geom.Project(pScene.SpatialReference)
            Dim thePoint As IPoint
            thePoint = geom

            GL.glPointSize(15.0F)
            GL.glColor3ub(255, 0, 0)
            GL.glBegin(GL.GL_POINTS)
            GL.glVertex3f(thePoint.X, thePoint.Y, thePoint.Z)
            GL.glEnd()

            theFeature = theFeatCursor.NextFeature
        End While

        RefreshView()
    End Sub

I am using VB, however, I tried to write exactly as what I saw in this thread. Unfortunately, when I click the run button. The result is nothing. I can only see my original layer on the arcscene view, as if I didn't click the button. Is there something wrong with my codes? Any help will be much appreciated.

Thank you very much.

Re: ArcScene: 2D scene export uses OpenGL 1.1

juan_marvinwirjomartono — Fri, 21 Jun 2013 08:44:46 GMT

Hellow all,

Just for your info, I found my mistakes. Now I can draw the OpenGL point next to one of my point data in ArcScene using VB language (Visual Studio 2010).

Thank you very much for this useful thread.

Re: ArcScene: 2D scene export uses OpenGL 1.1

StanislavSmetanin — Thu, 03 Sep 2015 02:07:03 GMT

Hello. Sorry for disturbing, but I have a same problem and I simply don't understand a source of that problem. I tried to drawing the OpenGL point, as you can see in the code below, but it doesn't work! Sorry for my english either.

Could you share with me your VB code? Some examples? Please! I never worked with OpenGL before.

ISceneGraphEvents_Event events = axSceneControl1.SceneGraph as ISceneGraphEvents_Event;

events.AfterDraw += new ISceneGraphEvents_AfterDrawEventHandler(events_AfterDraw);

void events_AfterDraw(ISceneViewer pViewer)

{

ISceneControlEvents_OnMouseDownEvent events = e;

if (events != null)

{

ISceneGraph pSceneGraph = axSceneControl1.SceneGraph;

object pOwner = null, //слой

pObject = null; //объект, на который указывает мышь

IPoint point = null;

pSceneGraph.Locate(pSceneGraph.ActiveViewer, events.x, events.y, esriScenePickMode.esriScenePickFastLocation, true, out point, out pOwner, out pObject);

if (point != null)

{

IGeometry geom = point as IGeometry;

geom.Project(axSceneControl1.Scene.SpatialReference);

point = geom as IPoint;

Gl.glPointSize(999.0f);

Gl.glColor3ub(0, 0, 0);

Gl.glBegin(Gl.GL_POINTS);

Gl.glVertex3d(point.X, point.Y, point.Z);

Gl.glEnd();

Gl.glFlush();

axSceneControl1.Invalidate();

}

Re: ArcScene: 2D scene export uses OpenGL 1.1

StanislavSmetanin — Sun, 06 Sep 2015 02:43:44 GMT

Please... someone... I need help)