CamControl

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Similar to 3D games in 2D games need camera controls for move screen left,right,bottom and up directions. Platform games, side-scrolling shootem-up games and other games based on sliding screen different direction. SWEngine simplifies this operation with camera control functions.

ScreenShot
Image:CamControl.jpg

Api Docs
SwEngine, swInput, swGraphics, swPoint, swDimension, swApplication

Source Code 

#include "../../include/SWEngine.h"
 
#pragma comment (lib,"../../lib/SWUtil.lib")    
#pragma comment (lib,"../../lib/SWTypes.lib")    
#pragma comment (lib,"../../lib/SWCore.lib")    
#pragma comment (lib,"../../lib/SWEngine.lib")    
 
 
swApplication camControlApp;
swPoint elipsCenter={400,300};
swDimension elipsDim={300,100};
swKeyboardState keybState;
swMouseState    mousState;
int             camID;
 
 
//-------------------------------------------------------------------------------------------
void GameLoop(){ 
 
 
	//Input Handling
	swInputListenKeyboard(&keybState);
	swInputListenMouse(&mousState);
	if(keybState.keyESCAPE){
		swEngineExit();
	}
 
	if(keybState.keyLEFT)
		swGraphicsAddCamPosX(camID,-2);
 
	if(keybState.keyRIGHT)
		swGraphicsAddCamPosX(camID,2);
 
	if(keybState.keyUP)
		swGraphicsAddCamPosY(camID,2);
 
	if(keybState.keyDOWN)
		swGraphicsAddCamPosY(camID,-2);
 
 
	if(keybState.key1)
		swGraphicsAddCamZoom(camID,0.1);
 
	if(keybState.key2)
		swGraphicsAddCamZoom(camID,-0.1);
 
 
	if(mousState.btnLEFT)
		swGraphicsAddCamRot(camID,2);
 
	if(mousState.btnRIGHT)
		swGraphicsAddCamRot(camID,-2);
 
 
	swGraphicsBeginScene();
		swGraphicsActiveCam(camID);
 
		//Background
		swGraphicsSetBgColor0(0.6f,0.6f,0.6f);
 
		//BlendingMode
		swGraphicsSetBlendingMode(SW_BLENDING_MODE_ADDITIVE);
 
		//Draw Elips
		swGraphicsSetColor0(0,1,0,0.5);
		swGraphicsRenderSolidElips2(&elipsCenter,&elipsDim,30,0);
 
		swGraphicsSetColor0(1,0,0,0.5);
		swGraphicsRenderSolidElips2(&elipsCenter,&elipsDim,30,60);
 
		swGraphicsSetColor0(0,0,1,0.5);
		swGraphicsRenderSolidElips2(&elipsCenter,&elipsDim,30,120);
 
	swGraphicsEndScene();
 
}
 
 
 
 
 
//-------------------------------------------------------------------------------------------
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd)
{ 
 
 
	//Application Settings
	camControlApp.hInstance=hInstance;
	camControlApp.fullScreen=false;
	camControlApp.cursor=true;
	camControlApp.width=800;
	camControlApp.height=600;
	camControlApp.title="Camera Control";
	camControlApp.path="";
	camControlApp.appRun=GameLoop;
 
	//Application Execution
	swEngineInit(&camControlApp);
 
	//Create Cam
	camID=swGraphicsCreateCam();
 
	swEngineRun();
	swEngineExit();
 
	return 0;
}
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