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CaveDisplayDevice.C

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00001 /***************************************************************************
00002  *cr                                                                       
00003  *cr            (C) Copyright 1995-2019 The Board of Trustees of the           
00004  *cr                        University of Illinois                       
00005  *cr                         All Rights Reserved                        
00006  *cr                                                                   
00007  ***************************************************************************/
00008 
00009 /***************************************************************************
00010  * RCS INFORMATION:
00011  *
00012  *      $RCSfile: CaveDisplayDevice.C,v $
00013  *      $Author: johns $        $Locker:  $                $State: Exp $
00014  *      $Revision: 1.49 $      $Date: 2019/01/17 21:20:58 $
00015  *
00016  ***************************************************************************
00017  * DESCRIPTION:
00018  *
00019  * a CAVE specific display device for VMD
00020  ***************************************************************************/
00021 
00022 #include "CaveDisplayDevice.h" 
00023 #include "Inform.h"
00024 #include <cave_ogl.h>          // include cave library access
00025 
00026 // static string storage used for returning stereo modes
00027 static const char *caveStereoNameStr[1] = {"Cave"};
00028 
00030 CaveDisplayDevice::CaveDisplayDevice(void) : OpenGLRenderer("Cave") {
00031   stereoNames = caveStereoNameStr;
00032   stereoModes = 1;
00033   doneGLInit = FALSE;    
00034   num_display_processes  = CAVEConfig->ActiveWalls;
00035   // XXX need to test this still
00036   // ext->hasstereo = CAVEInStereo();  // stereo available
00037     
00038   // leave everything else up to the cave_gl_init_fn
00039 }
00040 
00042 CaveDisplayDevice::~CaveDisplayDevice(void) {
00043   // nothing to do
00044 }
00045 
00046 
00048 
00049 // set up the graphics on the seperate CAVE displays
00050 void CaveDisplayDevice::cave_gl_init_fn(void) {
00051   setup_initial_opengl_state();     // do all OpenGL setup/initialization now
00052 
00053   // follow up with mode settings
00054   aaAvailable = TRUE;               // enable antialiasing
00055   cueingAvailable = FALSE;          // disable depth cueing
00056   cullingAvailable = FALSE;         // disable culling 
00057   // XXX need to test this still
00058   // ext->hasstereo = CAVEInStereo();  // stereo availability test
00059   ext->hasstereo = TRUE;            // stereo is on initially
00060   ext->stereodrawforced = FALSE;    // no need for forced stereo draws
00061  
00062   glClearColor(0.0, 0.0, 0.0, 0.0); // set clear color to black
00063 
00064   aa_on();                          // force antialiasing on if possible
00065   cueing_off();                     // force depth cueing off
00066 
00067   // set default settings 
00068   set_sphere_mode(sphereMode);
00069   set_sphere_res(sphereRes);
00070   set_line_width(lineWidth);
00071   set_line_style(lineStyle);
00072 
00073   clear();                          // clear screen
00074   update();                         // swap buffers
00075 
00076   // we want the CAVE to be centered at the origin, and in the range -1, +1
00077   (transMat.top()).translate(0.0, 3.0, -2.0);
00078   (transMat.top()).scale(VMD_PI);
00079 
00080   doneGLInit = TRUE;                // only do this once
00081 }
00082 
00083 void CaveDisplayDevice::set_stereo_mode(int) {
00084   // cannot change to stereo mode in the CAVE, it is setup at init time
00085 }
00086   
00087 void CaveDisplayDevice::normal(void) {
00088   // prevent the OpenGLRenderer implementation of this routine
00089   // from overriding the projection matrices provided by the 
00090   // CAVE library.
00091 }
00092 
00093 // special render routine to check for graphics initialization
00094 void CaveDisplayDevice::render(const VMDDisplayList *cmdlist) {
00095   if(!doneGLInit) {
00096     cave_gl_init_fn();
00097   }
00098 
00099   // prepare for rendering
00100   glPushMatrix();
00101   multmatrix((transMat.top()));  // add our CAVE adjustment transformation
00102 
00103   // update the cached transformation matrices for use in text display, etc.
00104   // In the CAVE, we have to do this separately for all of the processors.  
00105   // Would be nice to do this outside of the render routine however, 
00106   // amortized over several Displayables.
00107   glGetFloatv(GL_PROJECTION_MATRIX, ogl_pmatrix);
00108   glGetFloatv(GL_MODELVIEW_MATRIX, ogl_mvmatrix);
00109   ogl_textMat.identity();
00110   ogl_textMat.multmatrix(ogl_pmatrix);
00111   ogl_textMat.multmatrix(ogl_mvmatrix);
00112 
00113   // call OpenGLRenderer to do the rest of the rendering the normal way
00114   OpenGLRenderer::render(cmdlist);
00115   glPopMatrix();
00116 }
00117 
00118 // update after drawing
00119 void CaveDisplayDevice::update(int do_update) {
00120   // XXX don't do buffer swaps in the CAVE!!!
00121   //     Though not well documented, it is implicitly illegal 
00122   //     to call glxSwapBuffers() or to call glDrawBuffer() 
00123   //     in a CAVE application, since CAVElib does this for you.
00124 }
00125 

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