uevents.c

利用VC++和OpenGVS结合编的一个关于火车运行的三维模拟程序。是OpenGVS三维初学者的应该参考的好范例。

        /* Encode the event data for the slaves to act upon */
        event.opcode = APP_EVENT_SPOTLIGHT_ROTATION;
        ptr_float = (float *)&event.data[0];
        *ptr_float = rot.x;
        ptr_float += 1;
        *ptr_float = rot.y;
        ptr_float += 1;
        *ptr_float = rot.z;

        /* Update discrete count */
        host_data.event = event;
        host_data.discrete_count++;
    }
    #endif
}

/*****************************************************************************
*
*  mspotlight_pitch_decrease --
*
*	Change the pitch of the spotlight by changing the orientation
*	of the subpart on the owntrain object (the spotlight effect
*	is attached to this subpart)
*
******************************************************************************/
static void mspotlight_pitch_decrease( int reason )
{
    tspotlight_pitch_decrease( reason );

    if( !ownspot )
    {
        GV_obi_inq_by_name( "OWNTRAIN", &owntrain );
	GV_obi_inq_by_name_relative( owntrain, ".../spotlight", &ownspot );
    }

    #if 0
    if( ownspot )
    {
        G_Rotation rot;
        Tevent event;

        GV_obi_inq_rotation( ownspot, &rot );

	#if DEBUG
	    fprintf( stdout, "spotlight rotx-roty-rotz: %f %f %f\n",
	        rot.x, 
	        rot.y, 
	        rot.z );
	#endif

        /* Encode the event data for the slaves to act upon */
        event.opcode = APP_EVENT_SPOTLIGHT_ROTATION;
        ptr_float = (float *)&event.data[0];
        *ptr_float = rot.x;
        ptr_float += 1;
        *ptr_float = rot.y;
        ptr_float += 1;
        *ptr_float = rot.z;

        /* Update discrete count */
        host_data.event = event;
        host_data.discrete_count++;
    }
    #endif
}

/*****************************************************************************
*
*  mspotlight_pitch_decrease --
*
*	Change the pitch of the spotlight by changing the orientation
*	of the subpart on the owntrain object (the spotlight effect
*	is attached to this subpart)
*
******************************************************************************/
static void mspotlight_pitch_increase( int reason )
{
    tspotlight_pitch_increase( reason );

    if( !ownspot )
    {
        GV_obi_inq_by_name( "OWNTRAIN", &owntrain );
	GV_obi_inq_by_name_relative( owntrain, ".../spotlight", &ownspot );
    }

    #if 0
    if( ownspot )
    {
        G_Rotation rot;
        Tevent event;
        GV_obi_inq_rotation( ownspot, &rot );

	#if DEBUG
	    fprintf( stdout, "spotlight rotx-roty-rotz: %f %f %f\n",
	        rot.x, 
	        rot.y, 
	        rot.z );
	#endif

        /* Encode the event data for the slaves to act upon */
        event.opcode = APP_EVENT_SPOTLIGHT_ROTATION;
        ptr_float = (float *)&event.data[0];
        *ptr_float = rot.x;
        ptr_float += 1;
        *ptr_float = rot.y;
        ptr_float += 1;
        *ptr_float = rot.z;

        /* Update discrete count */
        host_data.event = event;
        host_data.discrete_count++;
    }
    #endif
}


/*****************************************************************************
*
*  mspotlight_roll_decrease --
*
*	Change the roll of the spotlight by changing the orientation
*	of the subpart on the owntrain object (the spotlight effect
*	is attached to this subpart)
*
******************************************************************************/
static void mspotlight_roll_decrease( int reason )
{
    tspotlight_roll_decrease( reason );

    if( !ownspot )
    {
        GV_obi_inq_by_name( "OWNTRAIN", &owntrain );
	GV_obi_inq_by_name_relative( owntrain, ".../spotlight", &ownspot );
    }

    #if 0
    if( ownspot )
    {
        G_Rotation rot;
        Tevent event;
        GV_obi_inq_rotation( ownspot, &rot );

	#if DEBUG
	    fprintf( stdout, "spotlight rotx-roty-rotz: %f %f %f\n",
	        rot.x, 
	        rot.y, 
	        rot.z );
	#endif

        /* Encode the event data for the slaves to act upon */
        event.opcode = APP_EVENT_SPOTLIGHT_ROTATION;
        ptr_float = (float *)&event.data[0];
        *ptr_float = rot.x;
        ptr_float += 1;
        *ptr_float = rot.y;
        ptr_float += 1;
        *ptr_float = rot.z;

        /* Update discrete count */
        host_data.event = event;
        host_data.discrete_count++;
    }
    #endif
}

/*****************************************************************************
*
*  mspotlight_roll_increase --
*
*	Change the roll of the spotlight by changing the orientation
*	of the subpart on the owntrain object (the spotlight effect
*	is attached to this subpart)
*
******************************************************************************/
static void mspotlight_roll_increase( int reason )
{
    tspotlight_roll_increase( reason );

    if( !ownspot )
    {
        GV_obi_inq_by_name( "OWNTRAIN", &owntrain );
	GV_obi_inq_by_name_relative( owntrain, ".../spotlight", &ownspot );
    }

    #if 0
    if( ownspot )
    {
        G_Rotation rot;
        Tevent event;
        GV_obi_inq_rotation( ownspot, &rot );

	#if DEBUG
	    fprintf( stdout, "spotlight rotx-roty-rotz: %f %f %f\n",
	        rot.x, 
	        rot.y, 
	        rot.z );
	#endif

        /* Encode the event data for the slaves to act upon */
        event.opcode = APP_EVENT_SPOTLIGHT_ROTATION;
        ptr_float = (float *)&event.data[0];
        *ptr_float = rot.x;
        ptr_float += 1;
        *ptr_float = rot.y;
        ptr_float += 1;
        *ptr_float = rot.z;

        host_data.event = event;
        host_data.discrete_count++;
    }
    #endif
}

/*****************************************************************************
*
*  mspotlight_event_attenuation --
*
*	Alter the spotlight attenuation
*
******************************************************************************/
static void mspotlight_event_attenuation( int reason )
{
    GVU_Plsr spotlight;
    float atten;
    Tevent event;

    tspotlight_event_attenuation( reason );

    GVU_plsr_inq_by_name( TSPOTLIGHT_NAME, &spotlight );
    GVU_plsr_inq_attenuation( spotlight, 
           GL_QUADRATIC_ATTENUATION, &atten );

    /* Encode the event data for the slaves to act upon */
    event.opcode = APP_EVENT_SPOTLIGHT_ATTENUATION;
    ptr_float = (float *)&event.data[0];
    *ptr_float = atten;

    host_data.event = event;
    host_data.discrete_count++;
}

/*****************************************************************************
*
*  mspotlight_event_falloff --
*
*	Alter the spotlight falloff 
*
******************************************************************************/
static void mspotlight_event_falloff( int reason )
{
    GVU_Plsr spotlight;
    float falloff;
    Tevent event;

    tspotlight_event_falloff( reason );

    GVU_plsr_inq_by_name( TSPOTLIGHT_NAME, &spotlight );
    GVU_plsr_inq_spot_exponent( spotlight, &falloff );

    /* Encode the event data for the slaves to act upon */
    event.opcode = APP_EVENT_SPOTLIGHT_FALLOFF;
    ptr_float = (float *)&event.data[0];
    *ptr_float = falloff;

    host_data.event = event;
    host_data.discrete_count++;
}


/****************************************************************************
*
*  events_init -- 
*
*	Event related initialization stuff when not running as a slave
*
*****************************************************************************/
void events_init( void )
{
    static GV_Rgba textcolor = {1.0, 1.0, 1.0, 1.0};
    char letteru;
    char letterl;
    char letter1;
    char letter2;
    char letter3;
    int uppercase;
    int lowercase;
    char temp[1024];

    /* Get pointer to parse data */
    tparse_inq_data( &tdata );

    if( tdata && tdata->network_duties == NETWORK_DUTIES_MASTER )
    {
        tkui_add_callback( G_ASCII_ESCAPE, event_quit );
        tkui_add_description( G_ASCII_ESCAPE, "   Esc  Network shutdown" );
        tkui_add_color( G_ASCII_ESCAPE, &textcolor ); 
    }

    lowercase = TSPOTLIGHT_LOWERCASE_KEY;
    uppercase = toupper(lowercase);
    letterl = (char)lowercase;
    letteru = (char)uppercase;

    tkui_add_callback( lowercase, mspotlight_toggle_cone_effect );
    tkui_add_callback( uppercase, mspotlight_toggle_cone_effect );
    sprintf( temp, "   %c,%c  Toggle spotlight cone object", letterl, letteru );
    tkui_add_description( lowercase, temp );
    tkui_add_color( lowercase, &textcolor );

    tkui_add_callback( lowercase, mspotlight_event_falloff );
    tkui_add_callback( uppercase, mspotlight_event_falloff );
    sprintf( temp, "   %c,%c  Spotlight falloff", letterl, letteru );
    tkui_add_description( lowercase, temp );
    tkui_add_color( lowercase, &textcolor );

    tkui_add_callback( lowercase, mspotlight_event_attenuation );
    tkui_add_callback( uppercase, mspotlight_event_attenuation );
    sprintf( temp, "   %c,%c  Spotlight attenuation", letterl, letteru );
    tkui_add_description( lowercase, temp );
    tkui_add_color( lowercase, &textcolor );

    tkui_add_callback( lowercase, mspotlight_event_toggle );
    tkui_add_callback( uppercase, mspotlight_event_toggle );
    sprintf( temp, "   %c,%c  Toggle spotlight effect", letterl, letteru );
    tkui_add_description( lowercase, temp );
    tkui_add_color( lowercase, &textcolor );

/****************************************************************************/
    lowercase = TSPOTLIGHT_ROT_LOWERCASE_KEY;
    uppercase = toupper(lowercase);
    letter1 = (char)uppercase;
    letter2 = (char)uppercase+1;
    letter3 = (char)uppercase+2;

    tkui_add_callback( lowercase, mspotlight_pitch_decrease );
    tkui_add_callback( lowercase+1, mspotlight_heading_increase );
    tkui_add_callback( lowercase+2, mspotlight_roll_increase );
    tkui_add_callback( uppercase, mspotlight_pitch_increase );
    tkui_add_callback( uppercase+1, mspotlight_heading_decrease );
    tkui_add_callback( uppercase+2, mspotlight_roll_decrease );
    tkui_add_color( lowercase, &textcolor );
    tkui_add_color( lowercase+1, &textcolor );
    tkui_add_color( lowercase+2, &textcolor );
    sprintf(temp," %c-%c-%c  Spotlight direction", 
        letter1, letter2, letter3);
    tkui_add_description(TKUI_XYZ_GROUP, temp );

/****************************************************************************/
    tkui_add_callback( 'o', event_toggle_recording );
    tkui_add_callback( 'O', event_toggle_recording );
    tkui_add_description( 'o', "   o,O  Record Start/Stop Ownship" );
    tkui_add_color( 'o', &textcolor ); /* Mark this as "DEMO specific" */

    tkui_add_callback( '>', event_playback_speed);
    tkui_add_callback( '<', event_playback_speed);
    tkui_add_description( '>', "   <,>  Playback speed" );
    tkui_add_color( '>', &textcolor ); /* Mark this as "DEMO specific" */
}