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/*
* main.c
*
* Where it all begins
*
* (c) 2008 Thomas White <taw27@cam.ac.uk>
*
* thrust3d - a silly game
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <SDL.h>
#include <gl.h>
#include <glu.h>
#include <assert.h>
#include "types.h"
#include "model.h"
#include "game.h"
#include "render.h"
#include "physics.h"
#include "utils.h"
typedef enum {
RES_640,
RES_800,
RES_1280,
RES_1330,
RES_1440,
RES_1600
} ScreenResolution;
static void main_version() {
printf("Thrust3D version "PACKAGE_VERSION", (c) 2008 Thomas White <taw27@srcf.ucam.org>\n");
}
int main(int argc, char *argv[]) {
SDL_Event event;
int finished;
SDL_Surface *screen;
int width, height;
int c;
Uint32 video_flags;
ScreenResolution res;
Uint32 t;
res = RES_800;
width = 800; height = 600;
video_flags = SDL_OPENGL;
while ((c = getopt(argc, argv, "hvr:f")) != -1) {
switch ( c ) {
case 'r' : {
if ( strcasecmp(optarg, "640") == 0 ) res = RES_640;
if ( strcasecmp(optarg, "800") == 0 ) res = RES_800;
if ( strcasecmp(optarg, "1280") == 0 ) res = RES_1280;
if ( strcasecmp(optarg, "1330") == 0 ) res = RES_1330;
if ( strcasecmp(optarg, "1440") == 0 ) res = RES_1440;
if ( strcasecmp(optarg, "1600") == 0 ) res = RES_1600;
break;
}
case 'f' : {
video_flags = video_flags | SDL_FULLSCREEN;
break;
}
case 'v' : {
main_version();
return 0;
}
case 'h' : {
printf("Syntax: %s [-h] [-r <res>] [-f]\n\n", argv[0]);
printf("Post-apocalyptic Jet Set Willy, set in a 3D nuclear power station.\n\n");
printf(" -h Display this help message and exit.\n");
printf(" -v Display version number and exit.\n");
printf(" -r <res> Set display resolution. See below for possible values for <res>.\n");
printf(" -f Use the full screen.\n\n");
printf("Allowable values for <res> are as follows:\n\n");
printf("<res> Width Height\n");
printf(" 640 - 640 x 480\n");
printf(" 800 - 800 x 600 (this is the default)\n");
printf(" 1280 - 1280 x 1024\n");
printf(" 1330 - 1330 x 900 (widescreen)\n");
printf(" 1440 - 1440 x 900 (widescreen)\n");
printf(" 1600 - 1600 x 1050 (widescreen)\n");
printf("\n");
main_version();
return 0;
}
default : {
return 1;
}
}
}
/* SDL initial setup */
if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
fprintf(stderr, "Couldn't initialise SDL: %s\n", SDL_GetError());
return 1;
}
atexit(SDL_Quit);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
switch ( res ) {
case RES_640 : { width = 640; height = 480; break; }
case RES_800 : { width = 800; height = 600; break; }
case RES_1280 : { width = 1280; height = 1024; break; }
case RES_1330 : { width = 1330; height = 900; break; }
case RES_1440 : { width = 1440; height = 900; break; }
case RES_1600 : { width = 1680; height = 1050; break; }
default : { assert(this_point_not_reached); break; }
}
screen = SDL_SetVideoMode(width, height, 16, video_flags);
if ( screen == NULL ) {
fprintf(stderr, "Couldn't set video mode: %s\n", SDL_GetError());
SDL_Quit();
return 1;
}
SDL_WM_SetCaption("Thrust3D", "Thrust3D");
SDL_ShowCursor(SDL_DISABLE);
/* World setup */
Game *game;
game = game_new(width, height);
/* Main loop */
finished = 0;
t = SDL_GetTicks();
while ( !finished ) {
/* Timer advances only when game is not paused */
t = SDL_GetTicks();
if ( game->paused ) {
game->tlast = t;
}
SDL_PollEvent(&event);
switch ( event.type ) {
case SDL_KEYDOWN :
if ( !game->paused ) {
if ( event.key.keysym.sym == SDLK_SPACE ) game->thrusting = 1;
if ( event.key.keysym.sym == SDLK_LEFT ) game->turn_left = 1;
if ( event.key.keysym.sym == SDLK_RIGHT ) game->turn_right = 1;
if ( event.key.keysym.sym == SDLK_UP ) game->forward = 1;
if ( event.key.keysym.sym == SDLK_DOWN ) game->reverse = 1;
}
if ( event.key.keysym.sym == SDLK_p ) game_pause(game);
if ( event.key.keysym.sym == SDLK_q ) finished = 1;
break;
case SDL_KEYUP :
/* Process key releases even when paused */
if ( event.key.keysym.sym == SDLK_SPACE ) game->thrusting = 0;
if ( event.key.keysym.sym == SDLK_LEFT ) game->turn_left = 0;
if ( event.key.keysym.sym == SDLK_RIGHT ) game->turn_right = 0;
if ( event.key.keysym.sym == SDLK_UP ) game->forward = 0;
if ( event.key.keysym.sym == SDLK_DOWN ) game->reverse = 0;
if ( event.key.keysym.sym == SDLK_p ) game->pause_rel = 1;
break;
case SDL_VIDEOEXPOSE :
/* Don't bother redrawing if not paused - not long to wait! */
if ( game->paused ) render_draw(game, t);
break;
case SDL_QUIT :
finished = 1;
break;
}
if ( !game->paused ) {
physics_step(game, t);
render_draw(game, t);
}
printf("%+7.4f %+7.4f %+7.4f %+5.1f deg %+7.5f %+7.5f %+7.5f %2i %2i %2i %3i fps\r",
game->lander->x, game->lander->y, game->lander->z,
rad2deg(game->lander->yaw), game->lander->vx, game->lander->vy, game->lander->vz,
game->cur_room_x, game->cur_room_y, game->cur_room_z, game->fps);
fflush(stdout);
/* Calculate FPS every half a second */
game->frames++;
if ( t - game->t_fps > 500 ) {
game->fps = (500*game->frames) / (t - game->t_fps);
game->t_fps = t;
game->frames = 0;
game->frame_delay_fiddled = 0;
}
/* Attempt to hold output FPS close to some target value */
if ( (!game->frame_delay_fiddled) && (game->fps < 30) ) {
game->frame_delay -= game->frame_delay/20;
game->frame_delay_fiddled = 1;
}
if ( (!game->frame_delay_fiddled) && (game->fps > 50) ) {
game->frame_delay += game->frame_delay/20;
game->frame_delay_fiddled = 1;
}
/* Sleep for a bit to avoid hogging the CPU. */
usleep(game->frame_delay);
}
render_shutdown(game->render);
SDL_CloseAudio();
SDL_Quit();
printf("\n");
return 0;
}
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