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/* Copyright (c) 1999 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* OpenGL driver for holodeck display. |
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* Based on GLX driver using T-mesh. |
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#ifdef STEREO |
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#include <X11/extensions/SGIStereo.h> |
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#endif |
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#include <time.h> |
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#include "rhd_odraw.h" |
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#ifdef DOBJ |
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dev_section(gfn, pfn) /* add octree for geometry rendering */ |
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char *gfn, *pfn; |
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{ |
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extern char *index(); |
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char *cp; |
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if (gfn == NULL) { |
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glClear(GL_DEPTH_BUFFER_BIT); /* clear system depth buffer */ |
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odDepthMap(0, depthbuffer); /* transfer depth data */ |
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if (pbuf != NULL) |
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free((char *)pbuf); /* free our portal buffer */ |
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free((void *)pbuf); /* free our portal buffer */ |
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} |
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return; |
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#ifdef STEREO |
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odDepthMap(1, NULL); |
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free((char *)depthright); |
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free((void *)depthright); |
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depthright = NULL; |
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#endif |
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odDepthMap(0, NULL); |
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free((char *)depthbuffer); |
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free((void *)depthbuffer); |
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depthbuffer = NULL; |
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} |
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static |
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waitabit() /* pause a moment */ |
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{ |
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struct timespec ts; |
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ts.tv_sec = 0; |
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ts.tv_nsec = 50000000; |
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nanosleep(&ts, NULL); |
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} |
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static |
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getmove(ebut) /* get view change */ |
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XButtonPressedEvent *ebut; |
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{ |
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setglpersp(); /* start us off in perspective */ |
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while (!XCheckMaskEvent(ourdisplay, |
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ButtonReleaseMask, levptr(XEvent))) { |
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/* pause so as not to move too fast */ |
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waitabit(); |
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/* get cursor position */ |
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if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
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&rootx, &rooty, &wx, &wy, &statemask)) |
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if (odev.v.vaft > FTINY) |
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dev_zmax = odev.v.vaft; |
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if (dev_zmin*500. < dev_zmax) |
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dev_zmax = dev_zmin*500.; |
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dev_zmin = dev_zmax/500.; |
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setzrat(); |
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xmax = dev_zmin * tan(PI/180./2. * odev.v.horiz); |
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xmin = -xmax; |