[vtkusers] X, vtkXOpenGLRenderWindow and vtkXRenderWindowInteractor

[Clinton Stimpson]

Yes, you can do it without Xt by making your own vtk interactor to work 
with plain Xlib.
You'll have to make your own event loop to get events and handle them.
You can also copy vtkXRenderWindowInteractorCallback from 
vtkXRenderWindowInteractor.cxx to handle events for the vtk window.

Clint

Kall, Bruce A. wrote:
> Is there anyway to do what I want via a straight Xlib-created window
> and no Xt?
>
> Bruce
>
>
> Clinton Stimpson wrote:
>>
>> vtkXRenderWindowInteractor also requires Xt, so you'll need the 
>> XtAppContext, and to give your own Window, it'll have to be an Xt 
>> Widget instead.
>>
>> Clint
>>
>> Kall, Bruce A. wrote:
>>> What is the correct way in X Windows (Xlib) to map my own X window and
>>> have all rendering and interaction happen with this window?
>>> I've modified the code for Example2.cxx (see below).
>>>
>>> The renWin->Render() works in the window I create, but the 
>>> interactor seems
>>> to create another window on the Start() command and then immediately 
>>> dies
>>> with a GLXBadDrawable error:
>>> Major opcode 128 (GLX)
>>> Minor opcode: 11 (X_GLXSwapBuffers)
>>>
>>> Any suggestions, corrections? Sure seems like this must have come up
>>> before, but I haven't found any code that does this in pure Xlib.
>>>
>>> If I comment out the renwin->Render() just before creating the 
>>> interactor, the
>>> interactor does create and pop up its own window (with no error) and 
>>> then all rendering and
>>> interaction does go into the window the interactor creates, but not 
>>> my window.
>>>
>>> Thanks,
>>> Bruce
>>>
>>>
>>> The code:
>>>
>>> /*========================================================================= 
>>>
>>>
>>>  Program:   Visualization Toolkit
>>>  Module:    $RCSfile: Example2.cxx,v $
>>>
>>>  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
>>>  All rights reserved.
>>>  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
>>>
>>>     This software is distributed WITHOUT ANY WARRANTY; without even
>>>     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
>>>     PURPOSE.  See the above copyright notice for more information.
>>>
>>> =========================================================================*/ 
>>>
>>> // include OS specific include file to mix in X code
>>>
>>> #include "vtkActor.h"
>>> #include "vtkConeSource.h"
>>> #include "vtkGlyph3D.h"
>>> #include "vtkPolyData.h"
>>> #include "vtkPolyDataMapper.h"
>>> #include "vtkRenderer.h"
>>> #include "vtkSphereSource.h"
>>> #include "vtkXOpenGLRenderWindow.h"
>>> #include "vtkXRenderWindowInteractor.h"
>>>
>>> #include <X11/Xlib.h>
>>>
>>>
>>> void quit_cb(Widget,XtPointer,XtPointer);
>>>
>>> int main (int argc, char *argv[])
>>> {
>>>  // X window stuff
>>>  int depth;
>>>  Visual *vis;
>>>  Display *display;
>>>  Window window;
>>>
>>>  Colormap col;
>>>
>>>  unsigned long white_pixel,black_pixel;
>>>  XColor color_value;
>>>
>>>  // do the xwindow ui stuff
>>>  // get the display connection and give it to the renderer
>>>  display = XOpenDisplay(NULL);
>>>  /* Turn X Synchronization on so errors happen right away, rather 
>>> than getting buffered */
>>>  XSynchronize(display,true);
>>>
>>>  // VTK stuff
>>>  vtkXOpenGLRenderWindow *renWin;
>>>  vtkRenderer *ren1;
>>>  vtkActor *sphereActor1, *spikeActor1;
>>>  vtkSphereSource *sphere;
>>>  vtkConeSource *cone;
>>>  vtkGlyph3D *glyph;
>>>  vtkPolyDataMapper *sphereMapper, *spikeMapper;
>>>  vtkXRenderWindowInteractor *iren;
>>>
>>>
>>>  renWin = vtkXOpenGLRenderWindow::New();
>>>
>>>  renWin->SetDisplayId(display);
>>>  depth = renWin->GetDesiredDepth();
>>>  vis = renWin->GetDesiredVisual();
>>>  col = renWin->GetDesiredColormap();
>>>
>>>  /* get a couple of colors */
>>>  white_pixel = 0;
>>>  black_pixel = 0;
>>>  if(XParseColor(display, col, "white", &color_value))
>>>    white_pixel = color_value.pixel;
>>>
>>>  if(XParseColor(display, col, "black", &color_value))
>>>    black_pixel = color_value.pixel;
>>>
>>>  window = 
>>> XCreateSimpleWindow(display,DefaultRootWindow(display),512,512,256,256,1,white_pixel,black_pixel); 
>>>
>>>  XMapRaised(display,window);
>>>  XFlush(display);
>>>  XClearWindow(display,window);
>>>  XFlush(display);
>>>  renWin->SetDisplayId(display);
>>>  renWin->SetWindowId(window);
>>>
>>>  ren1 = vtkRenderer::New();
>>>  renWin->AddRenderer(ren1);
>>>
>>>  sphere = vtkSphereSource::New();
>>>  sphereMapper = vtkPolyDataMapper::New();
>>>  sphereMapper->SetInputConnection(sphere->GetOutputPort());
>>>  sphereActor1 = vtkActor::New();
>>>  sphereActor1->SetMapper(sphereMapper);
>>>  cone = vtkConeSource::New();
>>>  glyph = vtkGlyph3D::New();
>>>  glyph->SetInputConnection(sphere->GetOutputPort());
>>>  glyph->SetSourceConnection(cone->GetOutputPort());
>>>  glyph->SetVectorModeToUseNormal();
>>>  glyph->SetScaleModeToScaleByVector();
>>>  glyph->SetScaleFactor(0.25);
>>>  spikeMapper = vtkPolyDataMapper::New();
>>>  spikeMapper->SetInputConnection(glyph->GetOutputPort());
>>>  spikeActor1 = vtkActor::New();
>>>  spikeActor1->SetMapper(spikeMapper);
>>>  ren1->AddActor(sphereActor1);
>>>  ren1->AddActor(spikeActor1);
>>>  ren1->SetBackground(0.4,0.1,0.2);
>>>
>>>  renWin->Render();
>>>  // We use an X specific interactor
>>>  // since we have decided to make this an X program
>>>  iren = vtkXRenderWindowInteractor::New();
>>>  iren->SetRenderWindow(renWin);
>>>
>>>  iren->Start();
>>>
>>>  return 0;
>>> }
>>>
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>>
>>