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graphics/vtkViewRays.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkViewRays.h,v $
00005   Language:  C++
00006 
00007 
00008 Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
00009 All rights reserved.
00010 
00011 Redistribution and use in source and binary forms, with or without
00012 modification, are permitted provided that the following conditions are met:
00013 
00014  * Redistributions of source code must retain the above copyright notice,
00015    this list of conditions and the following disclaimer.
00016 
00017  * Redistributions in binary form must reproduce the above copyright notice,
00018    this list of conditions and the following disclaimer in the documentation
00019    and/or other materials provided with the distribution.
00020 
00021  * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
00022    of any contributors may be used to endorse or promote products derived
00023    from this software without specific prior written permission.
00024 
00025  * Modified source versions must be plainly marked as such, and must not be
00026    misrepresented as being the original software.
00027 
00028 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
00029 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00030 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00031 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
00032 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00033 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00034 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00035 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00036 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00037 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00038 
00039 =========================================================================*/
00040 
00083 #ifndef __vtkViewRays_h
00084 #define __vtkViewRays_h
00085 #include "vtkObject.h"
00086 #include "vtkMatrix4x4.h"
00087 class vtkRenderer;
00088 
00089 class VTK_EXPORT vtkViewRays :public vtkObject
00090   {
00091 public:
00092   static vtkViewRays *New();
00093     vtkTypeMacro(vtkViewRays,vtkObject);
00094   void PrintSelf(ostream& os,vtkIndent indent);
00095 
00100   void SetRenderer(vtkRenderer *ren);
00101   vtkGetObjectMacro(Renderer,vtkRenderer);
00102 
00104   vtkSetVector2Macro(Size,int);
00105   vtkGetVector2Macro(Size,int);
00106 
00110   float *GetPerspectiveViewRays(void);
00111 
00113   float *GetParallelStartPosition(void);
00114 
00117   float *GetParallelIncrements(void);
00118 
00119 protected:
00120   vtkViewRays(void);
00121   ~vtkViewRays(void);
00122   vtkViewRays(const vtkViewRays&) {};
00123   void operator=(const vtkViewRays&) {};
00124 
00125   vtkRenderer     *Renderer;     // Renderer contains a camera
00126   int             Size[2];    // Number of view rays
00127   unsigned long   ViewRaysCamMtime; // Camera modified time
00128   unsigned long   ViewRaysMTime; // View rays modified time
00129 
00130   // Parallel camera information
00131   void            ComputeParallelInfo( int size[2] );
00132   float           StartPosition[3]; // Position of lower left ray
00133   float           Increments[2]; // Distance to move 1 ray over in X,Y
00134 
00135   // Perspective camera information
00136   void            ComputePerspectiveInfo(float *vr_ptr,int size[2]);
00137   float           *ViewRays;
00138   };
00139 #endif
00140 
00141 
00142 

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