how to do?

[East2010]

How to create a little coordination in the left-down corner,it rotates when the main coordination does?

[mikeheck]

Originally Posted by East2010

How to create a little coordination in the left-down corner,it rotates when the main coordination does?

There is an example in this thread.

Should still work. Let me know if there is any problem. :-)
Note: Since Open Inventor 8.6 you can use the SoDepthBuffer node to clear the OpenGL depth buffer. So it's no longer necessary to make OpenGL calls directly (like this example does).

[East2010]

I create a gnomon as you told me and it works.
But I find that SoROIManip is not ok after I created the gnomon.

I create a subvolume,in order to resize and move it,I use SoROIManip.

	SoROIManip* g_ROIManip = new SoROIManip();
	g_ROIManip->box.setValue(SbVec3i32(0,0,0), SbVec3i32(mg_volData->data.getSize()[0],mg_volData->data.getSize()[1],mg_volData->data.getSize()[2]) );
	g_ROIManip->subVolume.setValue(  SbVec3i32(mg_volData->data.getSize()[0]/4,mg_volData->data.getSize()[1]/4,mg_volData->data.getSize()[2]/4), SbVec3i32(mg_volData->data.getSize()[0]*3/4,mg_volData->data.getSize()[1]*3/4,mg_volData->data.getSize()[2]*3/4) );
	g_ROIManip->constrained = TRUE;
	g_ROIManip->boxOn = false;

see as ok.png.

I create the gnomon with following code:

	SoSeparator *pGnomon = makeGnomon();
	ldmnode->addChild( pGnomon );

and the ROIManip location is not normal (as notok.jpg)