source: code/branches/ode/ode-0.9/contrib/Mac_CFMCarbon/mac_source/drawstuff/src/mac_glut_carbon.cpp @ 216

/*************************************************************************
 *                                                                       *
 * DrawStuff Library, Copyright (C) 2001 Russell L. Smith.               *
 *   Email: russ@q12.org   Web: www.q12.org                              *
 *                                                                       *
 * This library is free software; you can redistribute it and/or         *
 * modify it under the terms of the GNU Lesser General Public            *
 * License as published by the Free Software Foundation; either          *
 * version 2.1 of the License, or (at your option) any later version.    *
 *                                                                       *
 * This library is distributed in the hope that it will be useful,       *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
 * Lesser General Public License for more details.                       *
 *                                                                       *
 * You should have received a copy of the GNU Lesser General Public      *
 * License along with this library (see the file LICENSE.TXT); if not,   *
 * write to the Free Software Foundation, Inc., 59 Temple Place,         *
 * Suite 330, Boston, MA 02111-1307 USA.                                 *
 *                                                                       *
 *************************************************************************/

// main window and event handling for Mac CFM Carbon

#include <ode/config.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <glut.h>
#include <SIOUX.h>

#include <MacTypes.h>
#include <Timer.h>

#include <drawstuff/drawstuff.h>
#include <drawstuff/version.h>
#include "internal.h"


//***************************************************************************
// error handling for unix (works just fine with SIOUX)

static void printMessage (char *msg1, char *msg2, va_list ap)
{
  fflush (stderr);
  fflush (stdout);
  fprintf (stderr,"\n%s: ",msg1);
  vfprintf (stderr,msg2,ap);
  fprintf (stderr,"\n");
  fflush (stderr);
}

extern "C" void dsError (char *msg, ...)
{
  va_list ap;
  va_start (ap,msg);
  printMessage ("Error",msg,ap);
  exit (1);
}


extern "C" void dsDebug (char *msg, ...)
{
  va_list ap;
  va_start (ap,msg);
  printMessage ("INTERNAL ERROR",msg,ap);
  // *((char *)0) = 0;   ... commit SEGVicide ?
  abort();
}

extern "C" void dsPrint (char *msg, ...)
{
  va_list ap;
  va_start (ap,msg);
  vprintf (msg,ap);
}

//***************************************************************************
// openGL window

// window and openGL
static int width=0,height=0;            // window size
static int last_key_pressed=0;          // last key pressed in the window
static int pause=0;                                     // 1 if in `pause' mode
static int singlestep=0;                        // 1 if single step key pressed
static int writeframes=0;                       // 1 if frame files to be written
static dsFunctions *gfn;
static int frame = 1;

float getTime (void)
{
        UnsignedWide ms;
        
        Microseconds(&ms);
        return ms.lo / 1000000.0;
}


static void captureFrame (int num)
{
// TODO
}

static void reshape(int w, int h)
{
        width = w;
        height = h;
}

static void draw(void)
{
        dsDrawFrame (width,height,gfn,pause && !singlestep);
        singlestep = 0;
        glutSwapBuffers();
        
        if (pause==0 && writeframes) {
      captureFrame (frame);
      frame++;
    }
}

static void idle(void)
{
        static float lasttime=0;
        float t;
        
        // Try to maintain a reasonable rate (good enough for testing anyway)
        t = getTime();
        if (lasttime < t) {
                lasttime = t+0.005;
                draw();
        }
}

static void key(unsigned char key, int x, int y)
{
        if (!glutGetModifiers()) {
                
                if (key >= ' ' && key <= 126 && gfn->command) gfn->command (key);
        
        // GLUT_ACTIVE_CTRL doesn't seem to be working, so we use Alt
        } else if (glutGetModifiers()&GLUT_ACTIVE_ALT) {
                
                switch (key) {
                case 't': case 'T':
                        dsSetTextures (dsGetTextures() ^ 1);
                        break;
                case 's': case 'S':
                        dsSetShadows (dsGetShadows() ^ 1);
                        break;
                case 'p': case 'P':
                        pause ^= 1;
                        singlestep = 0;
                        break;
                case 'o': case 'O':
                        if (pause) singlestep = 1;
                        break;
                case 'v': case 'V': {
                        float xyz[3],hpr[3];
                        dsGetViewpoint (xyz,hpr);
                        printf ("Viewpoint = (%.4f,%.4f,%.4f,%.4f,%.4f,%.4f)\n",
                                        xyz[0],xyz[1],xyz[2],hpr[0],hpr[1],hpr[2]);
                        break;
              }
            // No case 'X' - Quit works through the Mac system menu, or cmd-q
                case 'w': case 'W':
                        writeframes ^= 1;
                        if (writeframes) printf ("Write frames not done yet!\n");// TODO
                                break;
                }
        }
                
    last_key_pressed = key;
}

static int mx=0,my=0;   // mouse position
static int mode = 0;    // mouse button bits
  
static void MouseDown(int button, int state, int x, int y)
{
        if(button == GLUT_LEFT_BUTTON)
        {
                if(state == GLUT_DOWN)
                        mode |= 1;
                else if(state == GLUT_UP)
                        mode &= (~1);
        }
        else if (button == GLUT_MIDDLE_BUTTON)
        {
                if(state == GLUT_DOWN)
                        mode |= 3;
                else if(state == GLUT_UP)
                        mode &= (~3);
        }
        else if (button == GLUT_RIGHT_BUTTON)
        {
                if(state == GLUT_DOWN)
                        mode |= 2;
                else if(state == GLUT_UP)
                        mode &= (~2);
        }
        
        mx = x;
        my = y;
}

static void MouseMove(int x, int y)
{
        dsMotion (mode, x - mx, y - my);
        mx = x;
        my = y; 
}

static void createMainWindow (int _width, int _height)
{
        // So GLUT doesn't complain
        int argc = 0;
        char **argv = NULL;
        
        // initialize variables
        width = _width;
        height = _height;
        last_key_pressed = 0;

        if (width < 1 || height < 1) dsDebug (0,"bad window width or height");
        
        glutInit(&argc, argv);
        glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
        glutInitWindowSize(_width, _height);
        glutInitWindowPosition(100, 100);
        glutCreateWindow("ODE Simulation");
        
        glutKeyboardFunc(key);
        glutMotionFunc(MouseMove);
        glutMouseFunc(MouseDown);
        glutReshapeFunc(reshape);
        glutDisplayFunc(idle);
        glutIdleFunc(idle);
}

void dsPlatformSimLoop (int window_width, int window_height, dsFunctions *fn,
                        int initial_pause)
{       
        SIOUXSettings.initializeTB     = false;
        SIOUXSettings.standalone       = false;
        SIOUXSettings.setupmenus       = false;
        SIOUXSettings.autocloseonquit  = true;
        SIOUXSettings.asktosaveonclose = false;
                
        gfn = fn;
        pause = initial_pause;

        printf (
                        "\n"
                        "Simulation test environment v%d.%02d\n"
                        "   Option-P : pause / unpause (or say `-pause' on command line).\n"
                        "   Option-O : single step when paused.\n"
                        "   Option-T : toggle textures (or say `-notex' on command line).\n"
                        "   Option-S : toggle shadows (or say `-noshadow' on command line).\n"
                        "   Option-V : print current viewpoint coordinates (x,y,z,h,p,r).\n"
                        "   Option-W : write frames to ppm files: frame/frameNNN.ppm\n"
                        "\n"
                        "Change the camera position by clicking + dragging in the window.\n"
                        "   Left button - pan and tilt.\n"
                        "   Right button - forward and sideways.\n"
                        "   Left + Right button (or middle button) - sideways and up.\n"
                        "\n",DS_VERSION >> 8,DS_VERSION & 0xff);
        
        createMainWindow (window_width, window_height);
        dsStartGraphics (window_width,window_height,fn);
        
        if (fn->start) fn->start();
        
        glutMainLoop();
        
        if (fn->stop) fn->stop();
        dsStopGraphics();
}

extern "C" void dsStop(){ }// GLUT/MSL hooks into the system to exit