www.pudn.com > ATimeToKill.rar > engine.cpp

#define WIN32_LEAN_AND_MEAN 
#define WIN32_EXTRA_LEAN 
 
#include  
 
#include "engine.h" 
#include "HiResTimer.h" 
#include "camera.h" 
#include "world.h" 
 
void CEngine::CheckInput(float deltaTime) 
{ 
	static float buttonDelta = 0.0f; 
 
	int mouseDeltaX, mouseDeltaY;	// changes in the mouse position 
 
	// decrease amount of time until next possible recognized button pressing 
	buttonDelta -= deltaTime; 
 
	if (buttonDelta < 0.0f) 
		buttonDelta = 0.0f; 
 
	// update devices 
	inputSystem->Update(); 
 
	// retrieve the latest mouse movements 
	inputSystem->GetMouseMovement(mouseDeltaX, mouseDeltaY); 
	OnMouseMove(mouseDeltaX, mouseDeltaY); 
 
	if (inputSystem->KeyDown(DIK_UP)) 
		OnKeyDown(VK_UP); 
	if (inputSystem->KeyDown(DIK_DOWN)) 
		OnKeyDown(VK_DOWN); 
	if (inputSystem->KeyDown(DIK_LEFT)) 
		OnKeyDown(VK_LEFT); 
	if (inputSystem->KeyDown(DIK_RIGHT)) 
		OnKeyDown(VK_RIGHT); 
	if (inputSystem->KeyDown(DIK_ADD)) 
		OnKeyDown(VK_ADD); 
	if (inputSystem->KeyDown(DIK_SUBTRACT)) 
		OnKeyDown(VK_SUBTRACT); 
	if (inputSystem->KeyDown(DIK_ESCAPE)) 
		OnKeyDown(VK_ESCAPE); 
	if (inputSystem->ButtonDown(0)) 
	{ 
		if (buttonDelta == 0.0f) 
		{ 
			OnMouseDownL(0,0); 
			buttonDelta = 0.5f; 
		} 
	} 
} 
 
void CEngine::GameCycle(float deltaTime) 
{ 
	CCamera *camera = OnGetCamera();	// get the camera 
	CWorld *world = OnGetWorld();		// get the world 
 
	if (useDInput) 
		CheckInput(deltaTime); 
 
	// setup opengl for frame (clear, identity) 
	OnPrepare(); 
 
	// prepare objects and perform collisions 
	world->Prepare(); 
 
	// move/orient camera 
	camera->Animate(deltaTime); 
 
	// move/orient objects 
	world->Animate(deltaTime); 
 
	// draw objects 
	world->Draw(camera); 
 
	// swap buffers 
	SwapBuffers(hDC); 
} 
 
// EnterMessageLoop() 
// desc: the Windows message loop 
LRESULT CEngine::EnterMessageLoop() 
{ 
	//	Message loop 
	MSG msg; 
	timer = new CHiResTimer; 
 
	timer->Init(); 
 
	for (;;) 
	{	 
		GameCycle(timer->GetElapsedSeconds(1)); 
		SetWindowText(hWnd, "A Time To Kill"); 
		while (PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE)) 
		{ 
			// we always update if there are any events, even if we're paused 
			if (!GetMessage (&msg, NULL, 0, 0)) 
			{ 
				delete timer; 
				return msg.wParam; 
			} 
 
			TranslateMessage (&msg); 
    			DispatchMessage (&msg); 
		} 
	} 
 
	delete timer; 
 
	return msg.wParam; 
}