void MainGame::gameLoop() {
Bengine::FpsLimiter fpsLimiter;
fpsLimiter.setMaxFPS(60.0f);
// Main loop
while (_gameState == GameState::PLAY) {
fpsLimiter.begin();
checkVictory();
if (_timeElapsed > 100 && !_soldiersSpawned)
initSoldiers();
else
_timeElapsed++;
processInput();
updateAgents();
updateBullets();
_camera.setPosition(_player->getPosition());
_camera.update();
drawGame();
_fps = fpsLimiter.end();
}
}
void MainGame::gameLoop() {
// Some helpful constants.
const float DESIRED_FPS = 60.0f; // FPS the game is designed to run at
const int MAX_PHYSICS_STEPS = 6; // Max number of physics steps per frame
const float MS_PER_SECOND = 1000; // Number of milliseconds in a second
const float DESIRED_FRAMETIME = MS_PER_SECOND / DESIRED_FPS; // The desired frame time per frame
const float MAX_DELTA_TIME = 1.0f; // Maximum size of deltaTime
// Used to cap the FPS
Bengine::FpsLimiter fpsLimiter;
fpsLimiter.setMaxFPS(60000.0f);
// Zoom out the camera by 3x
const float CAMERA_SCALE = 1.0f / 8.0f;
m_camera.setScale(CAMERA_SCALE);
// Start our previousTicks variable
float previousTicks = SDL_GetTicks();
// Main loop
while (m_gameState == GameState::PLAY) {
fpsLimiter.begin();
// Calculate the frameTime in milliseconds
float newTicks = SDL_GetTicks();
float frameTime = newTicks - previousTicks;
previousTicks = newTicks; // Store newTicks in previousTicks so we can use it next frame
// Get the total delta time
float totalDeltaTime = frameTime / DESIRED_FRAMETIME;
checkVictory();
m_inputManager.update();
processInput();
int i = 0; // This counter makes sure we don't spiral to death!
// Loop while we still have steps to process.
while (totalDeltaTime > 0.0f && i < MAX_PHYSICS_STEPS) {
// The deltaTime should be the the smaller of the totalDeltaTime and MAX_DELTA_TIME
float deltaTime = std::min(totalDeltaTime, MAX_DELTA_TIME);
// Update all physics here and pass in deltaTime
if (m_grid.update(deltaTime, m_levels[m_currentLevel]->getLevelData(), m_player)) {
Bengine::fatalError("YOU LOSE");
}
m_particleEngine.update(deltaTime);
// Since we just took a step that is length deltaTime, subtract from totalDeltaTime
totalDeltaTime -= deltaTime;
// Increment our frame counter so we can limit steps to MAX_PHYSICS_STEPS
i++;
}
// Make sure the camera is bound to the player position
m_camera.setPosition(m_player->getPosition());
m_camera.update();
m_hudCamera.update();
drawGame();
// End the frame, limit the FPS, and get the current FPS.
m_fps = fpsLimiter.end();
std::cout << m_fps << std::endl;
}
}
