treewars/gamestate.cpp

#include "gamestate.h"

unsigned int GameState::FPS = 60;

GameState::GameState(stack<GameState*>* state_stack, SDL_Surface* display)
{
    this->state_stack = state_stack;
    this->display = display;
    init_done = false;
}


bool GameState::init()
{
    timer.start();
    init_done = true;
    return true;
}


void GameState::execute() throw(StateExit)
{
    timer.start();

    SDL_Event event;
    while(SDL_PollEvent(&event))
	handle_event(&event);
    iterate();
    render();

    // Let's avoid using *too* much of the CPU...
    if (timer.get_ticks() < 1000/FPS)
    {
	SDL_Delay((1000/FPS) - timer.get_ticks());
    }
}


void GameState::on_exit()
{
    throw StateExit();
}