/*
* Copyright 1995, Silicon Graphics, Inc.
* ALL RIGHTS RESERVED
*
* This source code ("Source Code") was originally derived from a
* code base owned by Silicon Graphics, Inc. ("SGI")
*
* LICENSE: SGI grants the user ("Licensee") permission to reproduce,
* distribute, and create derivative works from this Source Code,
* provided that: (1) the user reproduces this entire notice within
* both source and binary format redistributions and any accompanying
* materials such as documentation in printed or electronic format;
* (2) the Source Code is not to be used, or ported or modified for
* use, except in conjunction with OpenGL Performer; and (3) the
* names of Silicon Graphics, Inc. and SGI may not be used in any
* advertising or publicity relating to the Source Code without the
* prior written permission of SGI. No further license or permission
* may be inferred or deemed or construed to exist with regard to the
* Source Code or the code base of which it forms a part. All rights
* not expressly granted are reserved.
*
* This Source Code is provided to Licensee AS IS, without any
* warranty of any kind, either express, implied, or statutory,
* including, but not limited to, any warranty that the Source Code
* will conform to specifications, any implied warranties of
* merchantability, fitness for a particular purpose, and freedom
* from infringement, and any warranty that the documentation will
* conform to the program, or any warranty that the Source Code will
* be error free.
*
* IN NO EVENT WILL SGI BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT
* LIMITED TO DIRECT, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES,
* ARISING OUT OF, RESULTING FROM, OR IN ANY WAY CONNECTED WITH THE
* SOURCE CODE, WHETHER OR NOT BASED UPON WARRANTY, CONTRACT, TORT OR
* OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
* PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM,
* OR AROSE OUT OF USE OR RESULTS FROM USE OF, OR LACK OF ABILITY TO
* USE, THE SOURCE CODE.
*
* Contact information: Silicon Graphics, Inc.,
* 1600 Amphitheatre Pkwy, Mountain View, CA 94043,
* or: http://www.sgi.com
*
* trackball.c
*
* $Revision: 1.1 $
* $Date: 2000/11/21 21:39:39 $
*
* Run-time controls:
* ESC-key: exits
* F1-key: profile
* Left-mouse: advance
* Middle-mouse: stop
* Right-mouse: retreat
*/
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <signal.h> /* for sigset for forked X event handler process */
#include <getopt.h> /* for cmdline handler */
#include <X11/keysym.h>
#include <Performer/pf.h>
#include <Performer/pfutil.h>
#include <Performer/pfdu.h>
#include <Performer/pfui.h>
/*
* structure that resides in shared memory so that the
* application, cull, and draw processes can access it.
*/
typedef struct
{
pfPipeWindow *pw;
int exitFlag;
int inWindow, reset, stop;
float mouseX, mouseY;
int winSizeX, winSizeY;
int mouseButtons;
pfCoord view, viewOrig;
float sceneSize;
int drawStats;
pfiInputXformTrackball *trackball;
pfiInputCoord *tbInput;
pfDCS *sceneDCS;
int XInputInited;
} SharedData;
static SharedData *Shared;
/*
* APP process variables
*/
/* for configuring multi-process */
static int ProcSplit = PFMP_APPCULLDRAW;
/* write out scene upon read-in - uses pfDebugPrint */
static int WriteScene = 0;
static int FullScreen = 0;
static int WinType = PFWIN_TYPE_X;
static int NoBorder = 0;
static int ForkedXInput = 0;
char ProgName[PF_MAXSTRING];
/* light source created and updated in DRAW-process */
static pfLight *Sun;
static void CullChannel(pfChannel *chan, void *data);
static void DrawChannel(pfChannel *chan, void *data);
static void OpenPipeWin(pfPipeWindow *pw);
static void GetGLInput(void);
static void InitXInput(pfWSConnection dsp);
static void DoXInput(void);
static void GetXInput(Display *dsp);
static void Usage(void);
/* Trackball callback functions */
static int StartMotionCB(pfiInputXform *ix, void *data);
static int StopMotionCB(pfiInputXform *ix, void *data);
/*
* Usage() -- print usage advice and exit. This procedure
* is executed in the application process.
*/
static void
Usage (void)
{
pfNotify(PFNFY_FATAL, PFNFY_USAGE,
"Usage: %s [-m procSplit] [file.ext ...]\n", ProgName);
exit(1);
}
/*
* docmdline() -- use getopt to get command-line arguments,
* executed at the start of the application process.
*/
static int
docmdline(int argc, char *argv[])
{
int opt;
strcpy(ProgName, argv[0]);
/* process command-line arguments */
while ((opt = getopt(argc, argv, "fFbm:wxp:?")) != -1)
{
switch (opt)
{
case 'f':
FullScreen = 1;
break;
case 'F':
ForkedXInput = 1;
break;
case 'm':
case 'p':
ProcSplit = atoi(optarg);
break;
case 'w':
WriteScene = 1;
break;
case 'x':
WinType &= ~(PFWIN_TYPE_X);
break;
case 'b':
NoBorder = 1;
break;
case '?':
Usage();
}
}
return optind;
}
/*
* main() -- program entry point. this procedure
* is executed in the application process.
*/
int
main (int argc, char *argv[])
{
int arg;
int found;
pfNode *root;
pfChannel *chan;
pfScene *scene;
pfPipe *p;
pfPipeWindow *pw;
pfEarthSky *eSky;
pfBox bbox;
float far = 10000.0f;
void *arena;
pfWSConnection dsp=NULL;
arg = docmdline(argc, argv);
pfInit();
/* configure multi-process selection */
pfMultiprocess(ProcSplit);
/* allocate shared before fork()'ing parallel processes */
arena = pfGetSharedArena();
Shared = (SharedData*)pfMalloc(sizeof(SharedData), arena);
Shared->inWindow = 0;
Shared->stop = 0;
Shared->reset = 0;
Shared->exitFlag = 0;
Shared->drawStats = 1;
Shared->XInputInited = 0;
Shared->mouseButtons = 0;
/* Load all loader DSO's before pfConfig() forks */
for (found = arg; found < argc; found++)
pfdInitConverter(argv[found]);
/* initiate multi-processing mode set in pfMultiprocess call
* FORKs for Performer processes, CULL and DRAW, etc. happen here.
*/
pfConfig();
pfiInit();
Shared->trackball = pfiCreate2DIXformTrackball(arena);
Shared->tbInput = pfiGetIXformInputCoordPtr(Shared->trackball);
pfiIXformMotionFuncs(Shared->trackball, StartMotionCB, StopMotionCB, NULL);
Shared->sceneDCS = pfNewDCS();
/* configure pipes and windows */
p = pfGetPipe(0);
Shared->pw = pfNewPWin(p);
pfPWinName(Shared->pw, "OpenGL Performer");
pfPWinType(Shared->pw, WinType);
pfPWinMode(Shared->pw, PFWIN_NOBORDER, NoBorder);
/* Open and configure the GL window. */
pfPWinConfigFunc(Shared->pw, OpenPipeWin);
pfConfigPWin(Shared->pw);
if (FullScreen)
pfPWinFullScreen(Shared->pw);
else
pfPWinOriginSize(Shared->pw, 0, 0, 300, 300);
/* set off the draw process to open windows and call init callbacks */
pfFrame();
/* specify directories where geometry and textures exist */
if (!(getenv("PFPATH")))
pfFilePath(
"."
":./data"
":../data"
":../../data"
":/usr/share/Performer/data"
);
pfNotify(PFNFY_INFO, PFNFY_PRINT,"FilePath: %s\n", pfGetFilePath());
/* load files named by command line arguments */
scene = pfNewScene();
pfAddChild(scene, Shared->sceneDCS);
for (found = 0; arg < argc; arg++)
{
if ((root = pfdLoadFile(argv[arg])) != NULL)
{
pfAddChild(Shared->sceneDCS, root);
found++;
}
}
/* if no files successfully loaded, terminate program */
#if 0
if (!found)
Usage();
#endif
/* Write out nodes in scene (for debugging) */
if (WriteScene)
{
FILE *fp;
if (fp = fopen("scene.out", "w"))
{
pfPrint(scene, PFTRAV_SELF|PFTRAV_DESCEND, PFPRINT_VB_DEBUG, fp);
fclose(fp);
}
else
pfNotify(PFNFY_WARN, PFNFY_RESOURCE,
"Could not open scene.out for debug printing.");
}
/* determine extent of scene's geometry */
pfuTravCalcBBox(scene, &bbox);
pfFrameRate(30.0f);
pfPhase(PFPHASE_FREE_RUN);
chan = pfNewChan(p);
pfAddChan(Shared->pw, chan);
pfChanTravFunc(chan, PFTRAV_CULL, CullChannel);
pfChanTravFunc(chan, PFTRAV_DRAW, DrawChannel);
pfChanScene(chan, scene);
pfChanNearFar(chan, 0.1f, far);
/* Create an earth/sky model that draws sky/ground/horizon */
eSky = pfNewESky();
pfESkyMode(eSky, PFES_BUFFER_CLEAR, PFES_SKY_GRND);
pfESkyAttr(eSky, PFES_GRND_HT, -10.0f);
pfChanESky(chan, eSky);
pfChanTravMode(chan, PFTRAV_CULL, PFCULL_VIEW|PFCULL_GSET);
/* vertical FOV is matched to window aspect ratio */
pfChanFOV(chan, 45.0f, -1.0f);
if (found)
{
float sceneSize;
/* Set initial view to be "in front" of scene */
/* view point at center of bbox */
pfAddVec3(Shared->view.xyz, bbox.min, bbox.max);
pfScaleVec3(Shared->view.xyz, 0.5f, Shared->view.xyz);
/* find max dimension */
sceneSize = bbox.max[PF_X] - bbox.min[PF_X];
sceneSize = PF_MAX2(sceneSize, bbox.max[PF_Y] - bbox.min[PF_Y]);
sceneSize = PF_MAX2(sceneSize, bbox.max[PF_Z] - bbox.min[PF_Z]);
sceneSize = PF_MIN2(sceneSize, 0.5f * far);
Shared->sceneSize = sceneSize;
/* offset so all is visible */
Shared->view.xyz[PF_Y] -= sceneSize;
Shared->view.xyz[PF_Z] += 0.25f*sceneSize;
} else
{
pfSetVec3(Shared->view.xyz, 0.0f, 0.0f, 100.0f);
PFSET_VEC3(bbox.min, -5000.0, -5000.0, -1000000.0);
PFSET_VEC3(bbox.max, 5000.0, 5000.0, 10000000.0);
Shared->sceneSize = 10000.0f;
}
pfSetVec3(Shared->view.hpr, 0.0f, 0.0f, 0.0f);
pfChanView(chan, Shared->view.xyz, Shared->view.hpr);
PFCOPY_VEC3(Shared->viewOrig.xyz, Shared->view.xyz);
PFCOPY_VEC3(Shared->viewOrig.hpr, Shared->view.hpr);
pfiIXformDBLimits(Shared->trackball, &bbox);
pfiXformerResetCoord(Shared->trackball, &Shared->viewOrig);
pfiIXformCoord(Shared->trackball, &(Shared->viewOrig));
/* create forked XInput handling process
* since the Shared pointer has already been initialized, that structure
* will be visible to the XInput process. Nothing else created in the
* application after this fork whose handles are not put in shared memory
* (such as the database and channels) will be visible to the
* XInput process.
*/
if (WinType & PFWIN_TYPE_X)
{
if (ForkedXInput)
{
pid_t fpid = 0;
if ((fpid = fork()) < 0)
pfNotify(PFNFY_FATAL, PFNFY_SYSERR, "Fork of XInput process failed.");
else if (fpid)
pfNotify(PFNFY_NOTICE,PFNFY_PRINT,"XInput running in forked process %d",
fpid);
else if (!fpid)
DoXInput();
}
else
{
dsp = pfGetCurWSConnection();
InitXInput(dsp);
}
}
/* main simulation loop */
while (!Shared->exitFlag)
{
/* wait until next frame boundary */
pfSync();
/* initiate traversal using current state */
pfFrame();
if (Shared->reset)
{
pfiResetIXformPosition(Shared->trackball);
Shared->reset = 0x0;
}
else
if (Shared->stop)
{
pfiIXformTrackballMode(Shared->trackball,
PFIXTK_MODE_MOTION, PFIXTK_MOTION_STOP);
Shared->stop = 0x0;
}
/* let trackball spin if no new input */
if (!Shared->mouseButtons)
{
pfiIXformFocus(Shared->trackball, 0);
pfiIXformTrackballMode(Shared->trackball, PFIX_MODE_AUTO, 1);
}
else
{
pfVec2 pos;
pfuCalcNormalizedChanXY(&pos[0], &pos[1],
chan, Shared->mouseX, Shared->mouseY);
pfiInputCoordVec(Shared->tbInput, pos);
pfiIXformTrackballMode(Shared->trackball, PFIX_MODE_AUTO, 0);
/* do trackball */
pfiIXformFocus(Shared->trackball, 1);
switch(Shared->mouseButtons)
{
case Button2Mask:
pfiIXformTrackballMode(Shared->trackball,
PFIXTK_MODE_MOTION, PFIXTK_MOTION_ROTXZ);
break;
case Button2Mask | Button3Mask:
pfiIXformTrackballMode(Shared->trackball,
PFIXTK_MODE_MOTION, PFIXTK_MOTION_ROTY);
break;
case Button1Mask:
pfiIXformTrackballMode(Shared->trackball,
PFIXTK_MODE_MOTION, PFIXTK_MOTION_TRANSXZ);
break;
case Button1Mask | Button3Mask:
case Button3Mask:
pfiIXformTrackballMode(Shared->trackball,
PFIXTK_MODE_MOTION, PFIXTK_MOTION_TRANSY);
break;
default:
break;
}
}
pfiUpdateIXform(Shared->trackball);
{
pfMatrix mat;
pfiGetIXformMat(Shared->trackball, mat);
pfDCSMat(Shared->sceneDCS, mat);
}
if (!ForkedXInput)
{
if (!Shared->XInputInited)
InitXInput(dsp);
if (Shared->XInputInited)
GetXInput(dsp);
}
}
/* terminate cull and draw processes (if they exist) */
pfExit();
/* exit to operating system */
return 0;
}
static void
InitXInput(pfWSConnection dsp)
{
Window w;
/* wait for X Window to exist in Performer shared memory */
if (w = pfGetPWinWSWindow(Shared->pw))
{
XSelectInput(dsp, w, PointerMotionMask |
ButtonPressMask | ButtonReleaseMask | KeyPressMask);
XMapWindow(dsp, w);
XFlush(dsp);
Shared->XInputInited = 1;
}
}
/*
* DoXInput() runs an asychronous forked even handling process.
* Shared memory structures can be read from this process
* but NO performer calls that set any structures should be
* issues by routines in this process.
*/
void
DoXInput(void)
{
/* windows from draw should now exist so can attach X input handling
* to the X window
*/
Display *dsp = pfGetCurWSConnection();
Window w;
#ifndef __linux__
prctl(PR_TERMCHILD); /* Exit when parent does */
sigset(SIGHUP, SIG_DFL); /* Exit when sent SIGHUP by TERMCHILD */
#endif
while (1)
{
XEvent event;
if (!Shared->XInputInited)
InitXInput(dsp);
if (Shared->XInputInited)
{
XPeekEvent(dsp, &event);
GetXInput(dsp);
}
}
}
/*
* CullChannel() -- traverse the scene graph and generate a
* display list for the draw process. This procedure is
* executed in the CULL process.
*/
static void
CullChannel(pfChannel *channel, void *data)
{
/*
* pfDrawGeoSet or other display listable Performer routines
* could be invoked before or after pfCull()
*/
(channel, data);
pfCull();
}
/*
* OpenPipeWin() -- create a win: setup the GL and OpenGL Performer.
* This procedure is executed in the DRAW process
* (when there is a separate draw process).
*/
static void
OpenPipeWin(pfPipeWindow *pw)
{
pfPipe *p;
Window w;
Display *dsp;
pfOpenPWin(pw);
/* create a light source in the "south-west" (QIII) */
Sun = pfNewLight(NULL);
pfLightPos(Sun, -0.3f, -0.3f, 1.0f, 0.0f);
}
/*
* DrawChannel() -- draw a channel and read input queue. this
* procedure is executed in the draw process (when there is a
* separate draw process).
*/
static void
DrawChannel (pfChannel *channel, void *data)
{
(channel, data);
/* rebind light so it stays fixed in position */
pfLightOn(Sun);
/* erase framebuffer and draw Earth-Sky model */
pfClearChan(channel);
/* invoke Performer draw-processing for this frame */
pfDraw();
/* draw Performer throughput statistics */
if (Shared->drawStats)
pfDrawChanStats(channel);
/* read window origin and size (it may have changed) */
pfGetPWinSize(pfGetChanPWin(channel), &Shared->winSizeX, &Shared->winSizeY);
}
static void
GetXInput(Display *dsp)
{
static int x=0, y=0;
while (XPending(dsp))
{
XEvent event;
XNextEvent(dsp, &event);
switch (event.type)
{
case ConfigureNotify:
break;
case FocusIn:
Shared->inWindow = 1;
break;
case FocusOut:
Shared->inWindow = 0;
break;
case MotionNotify:
{
XMotionEvent *motion_event = (XMotionEvent *) &event;
x = motion_event->x;
y = Shared->winSizeY - motion_event->y;
}
break;
case ButtonPress:
{
XButtonEvent *button_event = (XButtonEvent *) &event;
x = event.xbutton.x;
y = Shared->winSizeY - event.xbutton.y;
Shared->inWindow = 1;
switch (button_event->button) {
case Button1:
Shared->mouseButtons |= Button1Mask;
break;
case Button2:
Shared->mouseButtons |= Button2Mask;
break;
case Button3:
Shared->mouseButtons |= Button3Mask;
break;
}
}
break;
case ButtonRelease:
{
XButtonEvent *button_event = (XButtonEvent *) &event;
switch (button_event->button) {
case Button1:
Shared->mouseButtons &= ~Button1Mask;
break;
case Button2:
Shared->mouseButtons &= ~Button2Mask;
break;
case Button3:
Shared->mouseButtons &= ~Button3Mask;
break;
}
}
break;
case KeyPress:
{
char buf[100];
int rv;
KeySym ks;
rv = XLookupString(&event.xkey, buf, sizeof(buf), &ks, 0);
switch(ks) {
case XK_Escape:
Shared->exitFlag = 1;
exit(0);
break;
case XK_space:
Shared->stop = 1;
break;
case XK_r:
Shared->reset = 1;
pfNotify(PFNFY_NOTICE, PFNFY_PRINT, "Reset");
break;
case XK_g:
Shared->drawStats = !Shared->drawStats;
break;
default:
break;
}
}
break;
default:
break;
}/* switch */
}
Shared->mouseX = x;
Shared->mouseY = y;
}
static int
StartMotionCB(pfiInputXform *ix, void *data)
{
pfNotify(PFNFY_NOTICE, PFNFY_PRINT,
"StartMotionCB - trackball motion starting.");
}
static int
StopMotionCB(pfiInputXform *ix, void *data)
{
pfNotify(PFNFY_NOTICE, PFNFY_PRINT,
"StopMotionCB - trackball motion stopping.");
}
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