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84 lines
2.4 KiB
84 lines
2.4 KiB
2 years ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkRendererCollection.cxx,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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#include "vtkRendererCollection.h"
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#include "vtkRenderWindow.h"
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#include "vtkObjectFactory.h"
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#include <stdlib.h>
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vtkCxxRevisionMacro(vtkRendererCollection, "$Revision: 1.33 $");
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vtkStandardNewMacro(vtkRendererCollection);
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// Forward the Render() method to each renderer in the list.
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void vtkRendererCollection::Render()
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{
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vtkRenderer *ren, *firstRen;
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vtkRenderWindow *renWin;
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int numLayers, i;
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vtkCollectionSimpleIterator rsit;
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this->InitTraversal(rsit);
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firstRen = this->GetNextRenderer(rsit);
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if (firstRen == NULL)
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{
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// We cannot determine the number of layers because there are no
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// renderers. No problem, just return.
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return;
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}
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renWin = firstRen->GetRenderWindow();
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numLayers = renWin->GetNumberOfLayers();
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// Only have the renderers render from back to front. This is necessary
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// because transparent renderers clear the z-buffer before each render and
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// then overlay their image.
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for (i = 0; i < numLayers; i++)
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{
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for (this->InitTraversal(rsit); (ren = this->GetNextRenderer(rsit)); )
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{
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if (ren->GetLayer() == i)
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{
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ren->Render();
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}
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}
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}
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// Let the user know if they have put a renderer at an unused layer.
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for (this->InitTraversal(rsit); (ren = this->GetNextRenderer(rsit)); )
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{
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if (ren->GetLayer() < 0 || ren->GetLayer() >= numLayers)
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{
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vtkErrorMacro(<< "Invalid layer for renderer: not rendered.");
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}
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}
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}
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vtkRenderer *vtkRendererCollection::GetFirstRenderer()
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{
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if ( this->Top == NULL )
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{
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return NULL;
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}
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else
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{
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return static_cast<vtkRenderer *>(this->Top->Item);
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}
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}
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//----------------------------------------------------------------------------
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void vtkRendererCollection::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os,indent);
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}
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