/****************************************************************************
* apps/graphics/traveler/trv_main.c
* This file contains the main logic for the NuttX version of Traveler
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <math.h>
#include "trv_types.h"
#include "trv_bitmaps.h"
#include "trv_world.h"
#include "trv_doors.h"
#include "trv_pov.h"
#include "trv_raycntl.h"
#include "trv_rayrend.h"
#include "trv_input.h"
#include "trv_graphics.h"
#include "trv_color.h"
#include "trv_debug.h"
#include "trv_main.h"
#if CONFIG_GRAPHICS_TRAVELER_PERFMON
# include <sys/types.h>
# include <sys/time.h>
# include <unistd.h>
#endif
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static void trv_exit(int exitCode);
static void trv_usage(char *execname);
#if CONFIG_GRAPHICS_TRAVELER_PERFMON
static double trv_current_time(void);
#endif
/****************************************************************************
* Public Data
*************************************************************************/
bool g_trv_terminate;
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static void trv_exit(int exitcode) noreturn_function;
static void trv_usage(char *execname);
#ifdef CONFIG_GRAPHICS_TRAVELER_PERFMON
static double trv_current_time(void);
#endif
/****************************************************************************
* Private Data
*************************************************************************/
static const char g_default_worldfile[] = "transfrm.wld";
static FAR struct trv_graphics_info_s g_trv_ginfo;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: trv_exit
*
* Description:
****************************************************************************/
static void trv_exit(int exitcode)
{
/* Release memory held by the ray casting engine */
trv_world_destroy();
/* Close off input */
trv_input_terminate();
trv_graphics_terminate(&g_trv_ginfo);
exit(exitcode);
}
/****************************************************************************
* Name: trv_usage
*
* Description:
****************************************************************************/
static void trv_usage(char *execname)
{
fprintf(stderr, "Usage: %s [-b] [-p<path>] [world]\n", execname);
fprintf(stderr, "Where:\n");
fprintf(stderr, " -p<path> Selects the path to the world data file\n");
fprintf(stderr, " world Selects the world file name\n");
exit(EXIT_FAILURE);
}
/****************************************************************************
* Name: trv_current_time
*
* Description:
****************************************************************************/
#ifdef CONFIG_GRAPHICS_TRAVELER_PERFMON
static double trv_current_time(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: main
*
* Description:
****************************************************************************/
#ifdef CONFIG_BUILD_KERNEL
int main(int argc, FAR char *argv[])
#else
int traveler_main(int argc, char *argv[])
#endif
{
FAR const char *world_filename;
#ifdef CONFIG_GRAPHICS_TRAVELER_PERFMON
int32_t frame_count = 0;
double elapsed_time = 0.0;
double start_time;
#endif
int ret;
int i;
/* Check for command line arguments */
world_filename = g_default_worldfile;
for (i = 1; i < argc; i++)
{
FAR char *ptr = argv[i];
if (*ptr == '-')
{
ptr++;
switch (*ptr)
{
case 'p' :
ptr++;
printf("World data path = %s\n", ptr);
if (chdir(ptr))
{
fprintf(stderr, "Bad path name\n");
trv_usage(argv[0]);
}
break;
default:
fprintf(stderr, "Invalid Switch\n");
trv_usage(argv[0]);
break;
}
}
else
{
world_filename = ptr;
}
}
trv_debug("World data file = %s\n", world_filename);
/* Initialize the graphics interface */
trv_graphics_initialize(&g_trv_ginfo);
/* Load the word data structures */
ret = trv_world_create(world_filename);
if (ret < 0)
{
trv_abort("ERROR: %d loading world file %s: %d\n",
world_filename, ret);
}
/* Release color mapping tables */
trv_color_endmapping();
/* Set the player's POV in the new world */
trv_pov_reset();
/* Initialize the world's door */
trv_door_initialize();
/* Set up to receive input */
trv_input_initialize();
g_trv_terminate = false;
while (!g_trv_terminate)
{
#ifdef CONFIG_GRAPHICS_TRAVELER_PERFMON
start_time = trv_current_time();
#endif
trv_input_read();
/* Select the POV to use on this viewing cycle */
trv_pov_new();
/* Process door animations */
trv_door_animate();
/* Paint the back drop */
trv_rend_backdrop(&g_trv_player, &g_trv_ginfo);
/* Render the 3-D view */
trv_raycaster(&g_trv_player, &g_trv_ginfo);
/* Display the world. */
trv_display_update(&g_trv_ginfo);
#ifdef CONFIG_GRAPHICS_TRAVELER_PERFMON
frame_count++;
elapsed_time += trv_current_time() - start_time;
if (frame_count == 100)
{
fprintf(stderr, "fps = %3.2f\n", (double) frame_count / elapsed_time);
frame_count = 0;
elapsed_time = 0.0;
}
#endif
}
trv_exit(EXIT_SUCCESS);
return 0;
}
/****************************************************************************
* Name: trv_abort
*
* Description:
****************************************************************************/
void trv_abort(FAR char *message, ...)
{
va_list args;
va_start(args, message);
vfprintf(stderr, message, args);
putc('\n', stderr);
va_end(args);
trv_exit(EXIT_FAILURE);
}
