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#include "DarkGDK.h"

float scaleFactor=1; // 1 is recommended
int dampening=3;
int timeScale=1;
int timed,timeSet;
int groundLevel=590;
int bouncePower=-100;
char szTemp[50];

typedef struct controlSytem{
	int x,y,w,h,id,timeOut;
	float vel;
	bool offGround;
	bool bouncy;
}physObject;

void DarkGDK(void){
	dbSetWindowOn();
	dbSetWindowTitle("Real-World Bounce Demo");
	dbSetDisplayMode(800,600,32);
	dbSetWindowSize(800,600);
	dbSyncOn();
	dbSync();
	dbBackdropOff();

	//Create physics 'object'
	physObject box;
	box.id=1;
		box.x=dbScreenWidth()/2-25;
		box.y=500;
		box.w=box.h=50;
		box.bouncy=true;
	dbCreateBitmap(box.id,box.w,box.h);
		dbSetCurrentBitmap(box.id);
		dbInk(dbRGB(255,255,255),dbRGB(0,0,0));
		dbBox(0,0,box.w,box.h);
		dbGetImage(box.id,0,0,box.w,box.h);
		dbSetCurrentBitmap(0);
	dbDeleteBitmap(box.id);
	dbSprite(box.id,box.x,box.y,box.id);

	dbWait(1000);

	static bool spaceKeyCatch=false;
	static bool upKeyCatch=false;
	static bool downKeyCatch=false;
	int init=1;

	while(LoopGDK()){
		timeSet=dbTimer();
		if(box.y<groundLevel-box.h)box.offGround=true;
		if(box.y>=groundLevel-box.h){
			if(init==1){
				init=0;
				box.vel=0;
			}
			box.offGround=false;
			box.y=groundLevel-box.h;
			if(box.bouncy)box.vel=-box.vel/dampening;
			if(!box.bouncy)box.vel=0;
			box.timeOut=0;
		}
		if((dbSpaceKey()==0)&&(spaceKeyCatch))spaceKeyCatch=false;
		if((dbSpaceKey()==1)&&(!spaceKeyCatch)){
			spaceKeyCatch=true;
			if(!box.offGround)box.vel=-bouncePower*scaleFactor;
		}
		if((box.vel<2)&&(box.vel>-2))box.vel=0;

		if((dbUpKey()==0)&&(upKeyCatch))upKeyCatch=false;
		if((dbUpKey()==1)&&(!upKeyCatch)){
			upKeyCatch=true;
			bouncePower-=10;
		}
		if((dbDownKey()==0)&&(downKeyCatch))downKeyCatch=false;
		if((dbDownKey()==1)&&(!downKeyCatch)){
			downKeyCatch=true;
			bouncePower+=10;
		}

		box.timeOut+=timed;
		box.vel+=(9.8*box.timeOut)/1000;
		box.y+=box.vel/scaleFactor;

		if(!box.offGround){
			if(dbLeftKey()==1)box.x--;
			if(dbRightKey()==1)box.x++;
		}
		if(box.x<=0)box.x=0;
		if(box.x>=dbScreenWidth()-box.w)box.x=dbScreenWidth()-box.w;

		dbSprite(box.id,box.x,box.y,box.id);
		//Timing
		dbSync();
		timed=dbTimer()-timeSet;
		dbCLS();
		dbInk(dbRGB(255,255,255),dbRGB(0,0,0));
		if(!box.offGround){
			dbCenterText(400,200,"Press Space to Bounce");
		}
		dbInk(dbRGB(255,0,0),dbRGB(0,0,0));
		sprintf(szTemp,"Bounce power: %d",-bouncePower);
		dbText(0,0,szTemp);
	}
return;
}