/****************************************************************************
* 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 defined(CONFIG_GRAPHICS_TRAVELER_PERFMON) || \
defined(CONFIG_GRAPHICS_TRAVELER_LIMITFPS)
# include <sys/types.h>
# include <sys/time.h>
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_GRAPHICS_TRAVELER_DEFPATH
# define CONFIG_GRAPHICS_TRAVELER_DEFPATH "/mnt/world"
#endif
/* Frame rate governer */
#ifdef CONFIG_GRAPHICS_TRAVELER_MAXFPS
# define CONFIG_GRAPHICS_TRAVELER_MAXFPS 30
#endif
#define MIN_FRAME_TIME (1.0 / (double)CONFIG_GRAPHICS_TRAVELER_MAXFPS)
/****************************************************************************
* Public Data
*************************************************************************/
bool g_trv_terminate;
/****************************************************************************
* Private Data
*************************************************************************/
static const char g_default_worldfile[] = "transfrm.wld";
static const char g_default_worldpath[] = CONFIG_GRAPHICS_TRAVELER_DEFPATH;
static FAR struct trv_graphics_info_s g_trv_ginfo;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: trv_exit
*
* Description:
****************************************************************************/
static void trv_exit(int exitcode) noreturn_function;
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:
****************************************************************************/
#if defined(CONFIG_GRAPHICS_TRAVELER_PERFMON) || \
defined(CONFIG_GRAPHICS_TRAVELER_LIMITFPS)
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 *wldpath;
FAR const char *wldfile;
#if defined(CONFIG_GRAPHICS_TRAVELER_PERFMON) || \
defined(CONFIG_GRAPHICS_TRAVELER_LIMITFPS)
#ifdef CONFIG_GRAPHICS_TRAVELER_PERFMON
int32_t frame_count = 0;
double start_time;
double now;
#endif
#ifdef CONFIG_GRAPHICS_TRAVELER_LIMITFPS
double frame_start;
#endif
double elapsed;
#endif
int ret;
int i;
/* Defaults */
wldpath = g_default_worldpath;
wldfile = g_default_worldfile;
/* Check for command line arguments */
for (i = 1; i < argc; i++)
{
FAR char *ptr = argv[i];
if (*ptr == '-')
{
ptr++;
switch (*ptr)
{
case 'p' :
wldpath = ptr++;
break;
default:
fprintf(stderr, "Invalid Switch\n");
trv_usage(argv[0]);
break;
}
}
else
{
wldfile = ptr;
}
}
trv_debug("World data file: %s\n", wldfile);
trv_debug("World data path: %s\n", wldpath);
/* Initialize the graphics interface */
trv_graphics_initialize(&g_trv_ginfo);
/* Load the word data structures */
ret = trv_world_create(wldpath, wldfile);
if (ret < 0)
{
trv_abort("ERROR: Failed to load world file %s: %d\n",
wldfile, 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();
#ifdef CONFIG_GRAPHICS_TRAVELER_PERFMON
/* Get the start time for performance monitoring */
start_time = trv_current_time();
#endif
g_trv_terminate = false;
while (!g_trv_terminate)
{
#ifdef CONFIG_GRAPHICS_TRAVELER_LIMITFPS
/* Get the start time from frame rate limiting */
frame_start = 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_player, &g_trv_ginfo);
/* Render the 3-D view */
trv_raycaster(&g_player, &g_trv_ginfo);
/* Display the world. */
trv_display_update(&g_trv_ginfo);
#ifdef CONFIG_GRAPHICS_TRAVELER_LIMITFPS
/* In the unlikely event that we are running "too" fast, we can delay
* here to enforce a maixmum frame rate.
*/
elapsed = trv_current_time() - frame_start;
if (elapsed < MIN_FRAME_TIME)
{
usleep(1000000 * (MIN_FRAME_TIME - elapsed));
}
#endif
#ifdef CONFIG_GRAPHICS_TRAVELER_PERFMON
/* Show the realized frame rate */
frame_count++;
if (frame_count >= 100)
{
now = trv_current_time();
elapsed = now - start_time;
fprintf(stderr, "fps = %3.2f\n", (double)frame_count / elapsed);
frame_count = 0;
start_time = now;
}
#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);
}