void game_render(SDL_Surface *buffer, camera *camera, PLAYERS *players, float interpolation) {
int w, h;
SDL_Rect terrain_rect = {gsl_vector_get(camera->vector, 0), gsl_vector_get(camera->vector, 1), WIDTH * ZOOM_LEVEL, HEIGHT * ZOOM_LEVEL};
SDL_BlitSurface(background, &terrain_rect, buffer, NULL);
player *pl;
division *div;
unit *un;
for(int i = 0; i < players->num; i++) {
pl = players->players[i];
for(int j = 0; j < pl->num_divisions; j++) {
div = pl->divisions[j];
for(int k = 0; k < div->size; k++) {
un = div->units[k];
display_unit(buffer, camera, un, pl->color, interpolation);
/* displays the closest node
ai_node *closest = find_closest_node(un->vector);
if(closest == NULL) {
printf("couldn't find a node for (%f, %f)\n",
gsl_vector_get(un->vector, 0),
gsl_vector_get(un->vector, 1));
} else {
//printf("closest to (%f, %f) -> (%d, %d)\n",
// gsl_vector_get(un->vector, 0),
// gsl_vector_get(un->vector, 1),
// closest->x, closest->y);
gsl_vector *v = calculate_display_position(closest->x, closest->y, camera);
filledCircleRGBA(buffer, gsl_vector_get(v, 0), gsl_vector_get(v, 1), 3, 0, 0xff, 0, 0xff);
gsl_vector_free(v);
}*/
}
}
}
// display the title in the upper left
SDL_BlitSurface(title, NULL, buffer, NULL);
// display the zoom level in the bottom left
char zoom[7];
snprintf(zoom, 7, "Zoom %i", ZOOM_LEVEL);
TTF_SizeUTF8(font, zoom, &w, &h);
SDL_Surface *zoom_surf = draw_text(zoom);
SDL_Rect zo = { 0, HEIGHT - h, w, h };
SDL_BlitSurface(zoom_surf, NULL, buffer, &zo);
SDL_FreeSurface(zoom_surf);
if(paused) {
paused_state.render(buffer, camera, players, interpolation);
} else {
update_camera_position(camera);
}
}
/**
* main
*
* TODO: Write function block once this is cleaned up.
*/
int main(int argc, char** argv)
{
/*
* Local Variables.
*/
SDL_Event transient_event;
SCREEN *screen;
MATCH_STATE *match_state;
Uint32 frame_start_time;
Uint32 frame_time_taken_ms;
Uint32 physics_time_delta;
Uint32 last_physics_update;
Uint32 ai_time_delta;
Uint32 last_ai_update;
Uint32 ms_per_frame;
int rc;
StrMap *config_table;
Uint32 last_animation_update = 0;
Uint32 animation_ms_per_frame;
int max_fps;
FONT *font;
char disc_graphic_file[MAX_CONFIG_VALUE_LEN + 1];
char grass_tile_file[MAX_CONFIG_VALUE_LEN + 1];
char o_xml_file[MAX_CONFIG_VALUE_LEN + 1];
char d_xml_file[MAX_CONFIG_VALUE_LEN + 1];
int ii;
SDL_Color white = {0xFF, 0xFF, 0xFF, 0x00};
/*
* Begin logging.
*/
DT_INIT_LOG;
/*
* TODO: Move loading and retrieving constants using defaults from the config
* file to a different folder, code file. Simple api.
*/
load_config_to_str_map("config.txt", &config_table);
if (!get_config_value_int(config_table,
cv_animation_ms_per_frame,
(int *)&animation_ms_per_frame))
{
game_exit("Programmer error: animation ms per frame not handled in cfg.");
}
if (!get_config_value_int(config_table, cv_max_fps, &max_fps))
{
game_exit("Programmer error: max fps not handled in cfg.");
}
ms_per_frame = (int) MILLISECONDS_PER_SECOND / max_fps;
if (!get_config_value_str(config_table, cv_disc_graphic, (char *)disc_graphic_file))
{
game_exit("Programmer error: disc graphic not handled in cfg.");
}
if (!get_config_value_str(config_table, cv_grass_tile_filename, (char *)grass_tile_file))
{
game_exit("Programmer error: grass tile graphic not handled in cfg.");
}
if (!get_config_value_str(config_table, cv_o_xml_file, (char *)o_xml_file))
{
game_exit("Programmer error: O XML file not handled in cfg.");
}
if (!get_config_value_str(config_table, cv_d_xml_file, (char *)d_xml_file))
{
game_exit("Programmer error: D XML file not handled in cfg.");
}
DT_DEBUG_LOG("Config file loaded\n");
/*
* Create the screen object and use it to initialise the window system.
*/
screen = create_screen();
rc = init_window_system(screen, SCREEN_WIDTH, SCREEN_HEIGHT, BPP);
if (INIT_OK != rc)
{
game_exit("Window system could not be initialised.");
}
DT_DEBUG_LOG("Graphics subsystem created and initialized\n");
/*
* Initialise Audio subsystem
*/
rc = init_audio_subsystem(config_table);
if (INIT_AUDIO_SYSTEM_OK != rc)
{
/*
* Don't exit just because we can't output audio. The audio code will
* handle this case.
*/
DT_DEBUG_LOG("Audio subsystem could not be initialised\n");
}
else
{
DT_DEBUG_LOG("Audio subsystem created and initialized\n");
}
/*
* Initialise the opengl components of the screen.
*/
rc = init_gl(screen);
if (GL_INIT_OK != rc)
{
game_exit("Could not do opengl initialisation.");
}
DT_DEBUG_LOG("OpenGL setup complete\n");
/*
* TODO: Proper font management system where more than one font can be loaded
*
* Create the font object that is going to be used to write text throughout
* the game.
*/
rc = create_font("..\\..\\resources\\Fonts\\LucidaSansRegular.ttf",
&font,
30,
TTF_STYLE_NORMAL,
white);
if (BUILD_FONT_OK != rc)
{
game_exit("Could not load up LucidaSansRegular font.");
}
DT_DEBUG_LOG("Lucida sans regular font loaded\n");
/*
* TODO: Constants to move from here.
*
* Create a new match state object before starting the game loop.
*/
match_state = create_match_state(15,
60 * 60,
disc_graphic_file,
grass_tile_file,
o_xml_file,
d_xml_file,
create_o_automaton_states,
create_automaton_events);
if (NULL == match_state)
{
game_exit("Failed to create match state.");
}
init_pitch(match_state->pitch);
DT_DEBUG_LOG("Match state created and initialized\n");
/*
* Scale the pitch by an arbitrary amount to account for the otherwise small
* scaling.
*/
scale_camera(match_state->camera_handler, 10.0f);
/*
* Load the animation data.
*/
rc = load_animation_data(match_state->animation_handler);
if (LOAD_ANIMATION_DATA_OK != rc)
{
game_exit("Failed to load animation data.");
}
DT_DEBUG_LOG("Animation data loaded\n");
/*
* Initialise the timings
*/
last_physics_update = SDL_GetTicks();
last_ai_update = SDL_GetTicks();
/*
* Initialise and start a new match.
*/
start_match(match_state);
// @@@DAT testing
throw_multi_player_ai_event_by_name(match_state->teams,
match_state->players_per_team,
match_state->teams[0]->players[0]->automaton,
AUTOMATON_EVENT_PULL_THROWN);
/*
* Game loop
*/
while(true)
{
/*
* Frame time is tracked so that we can determine how long to wait before
* displaying the next frame. i.e. to fix the FPS.
*/
frame_start_time = SDL_GetTicks();
/*
* Look at disc
*/
look_at_location(match_state->camera_handler,
match_state->disc->position.x,
match_state->disc->position.y,
screen);
/*
* While there are events to process, do so.
*/
while(SDL_PollEvent(&transient_event))
{
/*
* First check whether it is an SDL_QUIT event. If so then exit with
* message.
*/
if (transient_event.type == SDL_QUIT)
{
destroy_match_state(match_state);
game_exit("User requested exit via SDL_QUIT event.");
}
else if ((transient_event.type == SDL_KEYDOWN) ||
(transient_event.type == SDL_KEYUP))
{
/*
* The event was the user either depressing or releasing a key so call
* to the keyboard event handler to deal with the event.
*/
handle_keyboard_event(&(transient_event.key),
transient_event.type,
match_state,
screen);
}
else if ((transient_event.type == SDL_MOUSEBUTTONDOWN) ||
(transient_event.type == SDL_MOUSEBUTTONUP))
{
/*
* The event was the user either depressing or releasing a mouse button
* so pass to the mouse button event handler to deal with it. This
* includes the mouse wheel moving.
*/
handle_mousebutton_event(&(transient_event.button), match_state);
}
}
/*
* Perform an update on all the ai objects.
*/
ai_time_delta = SDL_GetTicks() - last_ai_update;
process_all_player_ai(match_state->teams,
match_state->players_per_team,
ai_time_delta);
last_ai_update = SDL_GetTicks();
/*
* Process the automaton timed event queue to see if any events need to be
* popped.
*/
pop_all_timed_events(match_state->automaton_handler->timed_event_queue,
SDL_GetTicks(),
match_state);
/*
* Do physics processing. This updates the positions of all moving entities
* in the game.
*
* WARNING - If this takes longer than the amount of time allocated per
* frame then there might be 'interesting' problems in the frame refresh.
*/
physics_time_delta = SDL_GetTicks() - last_physics_update;
calculate_positions(match_state,
physics_time_delta);
last_physics_update = SDL_GetTicks();
/*
* Having moved all of the objects to their new positions we need to
* detect collisions and verify the new locations.
*
* At the end of this function the positions of all objects will have been
* updated.
*/
detect_and_handle_collisions(match_state->teams,
match_state->players_per_team,
match_state->disc);
/*
* Update the camera object.
*/
update_camera_position(match_state);
/*
* TODO: Is this management of animations sufficient?
*
* Update the animation frame counters.
*/
if (SDL_GetTicks() - last_animation_update >= animation_ms_per_frame)
{
last_animation_update = SDL_GetTicks();
for (ii = 0; ii < match_state->players_per_team; ii++)
{
increment_animation_frame_counter(match_state->teams[0]->players[ii],
match_state->animation_handler);
increment_animation_frame_counter(match_state->teams[1]->players[ii],
match_state->animation_handler);
}
}
/*
* If the frame has taken less than the maximum allowed amount of time to
* render then delay the screen update.
*/
frame_time_taken_ms = SDL_GetTicks() - frame_start_time;
if (frame_time_taken_ms < ms_per_frame)
{
SDL_Delay(ms_per_frame - frame_time_taken_ms);
}
/*
* Redraw the screen.
*/
redraw_screen(screen, match_state, font);
}
return(0);
}
