Tutorial 13 2D Camera

/*****************************************************************************************
/* Desc: Tutorials a) 13 2d Camera
/*****************************************************************************************/
 
#include "CIndieLib_vc2008.h"
 
/*
==================
Main
==================
*/
int IndieLib()			
{
	// ----- IndieLib intialization -----
 
	CIndieLib *mI = CIndieLib::Instance();
	if (!mI->Init ()) return 0;			
 
	// ----- Surface loading -----
 
	// Loading tile for the terrain
	IND_Surface mSurfaceBack;
	if (!mI->SurfaceManager->Add (&mSurfaceBack, "..\\resources\\twist.jpg", IND_OPAQUE, IND_32)) return 0;
 
	// Loading beetle
	IND_Surface mSurfaceBeetle;
	if (!mI->SurfaceManager->Add (&mSurfaceBeetle, "..\\resources\\beetleship.png", IND_ALPHA, IND_32)) return 0;
 
	// Loading octopus
	IND_Surface mSurfaceOctopus;
	if (!mI->SurfaceManager->Add (&mSurfaceOctopus, "..\\resources\\octopus.png", IND_ALPHA, IND_32)) return 0;
 
	// Loading bug
	IND_Surface mSurfaceBug;
	if (!mI->SurfaceManager->Add (&mSurfaceBug, "..\\resources\\Enemy Bug.png", IND_ALPHA, IND_32)) return 0;
 
	// Font
	IND_Font mFontSmall;
	if (!mI->FontManager->Add (&mFontSmall, "..\\resources\\font_small.png", "..\\resources\\font_small.xml", IND_ALPHA, IND_32)) return 0;
 
	// ----- Font creation -----
 
	IND_Entity2d mTextSmallWhite;					
	mI->Entity2dManager->Add		(&mTextSmallWhite);			// Entity adding
	mTextSmallWhite.SetFont			(&mFontSmall);				// Set the font into the entity
	mTextSmallWhite.SetLineSpacing	(18);
	mTextSmallWhite.SetCharSpacing	(-8);
	mTextSmallWhite.SetPosition		(5, 5, 1);
	mTextSmallWhite.SetAlign		(IND_LEFT);
 
	// ----- Entities -----
 
	// Terrain
	IND_Entity2d mTerrain;
	mI->Entity2dManager->Add (&mTerrain);
	mTerrain.SetSurface (&mSurfaceBack);
 
	// Beetle
	IND_Entity2d mBeetle;
	mI->Entity2dManager->Add (&mBeetle);
	mBeetle.SetSurface (&mSurfaceBeetle);
	mBeetle.SetHotSpot (0.5f, 0.5f);
	mBeetle.SetPosition (150, 300, 2);
 
	// Octopus
	IND_Entity2d mOctopus;
	mI->Entity2dManager->Add (&mOctopus);
	mOctopus.SetSurface (&mSurfaceOctopus);
	mOctopus.SetHotSpot (0.5f, 0.5f);
	mOctopus.SetPosition (450, 300, 2);
 
	// But
	IND_Entity2d mBug;
	mI->Entity2dManager->Add (&mBug);
	mBug.SetSurface (&mSurfaceBug);
	mBug.SetHotSpot (0.5f, 0.5f);
	mBug.SetPosition (700, 300, 2);
 
	// ----- Camera -----
 
	float		mCameraX = (float) mI->Window->GetWidth () / 2;
	float		mCameraY = (float) mI->Window->GetHeight () / 2;
	IND_Camera2d mCamera ((int) mCameraX, (int) mCameraY);
 
	// ----- Main Loop -----
 
	float	mZoom = 1.0f;
	float	mCameraAngle = 0;
	float	mBugAngle = 0;
	char	mText [2048]; mText [0] = 0;
	int		mSpeedMoveCamera		= 200;
	int		mSpeedRotation			= 50;
	float	mDelta;
 
	while (!mI->Input->OnKeyPress (IND_ESCAPE) && !mI->Input->Quit())
	{
		// ----- Input update ----
 
		mI->Input->Update ();
 
		// ----- Text -----
 
		strcpy (mText, "Use WASD keys for translating the camera\n");
		strcat (mText, "Use mouse wheel for zooming in/out\n");
		strcat (mText, "Use mouse buttons for rotating the camera");
		mTextSmallWhite.SetText	 (mText);	
 
		// ----- Input ----
 
		mDelta = mI->Render->GetFrameTime() / 1000.0f;
 
		// Camera translation
		if (mI->Input->IsKeyPressed (IND_W))							mCameraY -= mSpeedMoveCamera * mDelta;
		if (mI->Input->IsKeyPressed (IND_S))							mCameraY += mSpeedMoveCamera * mDelta;
		if (mI->Input->IsKeyPressed (IND_A))							mCameraX -= mSpeedMoveCamera * mDelta;
		if (mI->Input->IsKeyPressed (IND_D))							mCameraX += mSpeedMoveCamera * mDelta;
 
		// Camera Zoom in / out
		if (mI->Input->OnMouseButtonPress	(IND_MBUTTON_WHEELUP))		mZoom += 0.1f;
		if (mI->Input->OnMouseButtonPress	(IND_MBUTTON_WHEELDOWN))	mZoom -= 0.1f;		
 
		// Camera angle
		if (mI->Input->IsMouseButtonPressed (IND_MBUTTON_LEFT))			mCameraAngle += mSpeedRotation * mDelta;
		if (mI->Input->IsMouseButtonPressed (IND_MBUTTON_RIGHT))		mCameraAngle -= mSpeedRotation * mDelta;
 
		// ----- Updating entities attributes  -----
 
		// Rotation of the beetle and bug
		mBugAngle += mSpeedRotation * mDelta;
		mBeetle.SetAngleXYZ (0, 0, mBugAngle);
		mBeetle.SetAngleXYZ (0, 0, mBugAngle);
		mBug.SetAngleXYZ (0, 0, -mBugAngle);
		mBug.SetAngleXYZ (0, 0, -mBugAngle);
 
		// Tranlasting, zooming and rotating the camera
		if (mZoom < 0.1f) mZoom =  0.1f;
		mCamera.SetPosition ((int) mCameraX, (int) mCameraY);
		mCamera.SetAngle (mCameraAngle);
		mCamera.SetZoom (mZoom);
 
		// ----- Render  -----
 
		mI->Render->BeginScene ();
		mI->Render->ClearViewPort (60, 60, 60);
		mI->Render->SetViewPort2d (0, 0, mI->Window->GetWidth(), mI->Window->GetHeight());
		mI->Render->SetCamera2d (&mCamera);
		mI->Entity2dManager->RenderEntities2d ();
		mI->Render->EndScene();
	}
 
	// ----- Free -----
 
	mI->End ();
 
	return 0;
}

Categories: Basic Tutorials | Tutorials