markRect method

void markRect(double sx, double sy, double ex, double ey,)

Implementation

void markRect( double sx, double sy, double ex, double ey ){
	int i;
	int tmp;

	int posX = _gWorld.imgPosX( sx );
	int posY = _gWorld.imgPosY( sy );
	int endX = _gWorld.imgPosX( ex );
	int endY = _gWorld.imgPosY( ey );
	if( posX > endX ){
		tmp = posX; posX = endX; endX = tmp;
	}
	if( posY > endY ){
		tmp = posY; posY = endY; endY = tmp;
	}

	for( i = posX; i <= endX; i++ ){
		_gWorld.putXOR( i, posY );
		_gWorld.putXOR( i, endY );
	}
	for( i = posY + 1; i < endY; i++ ){
		_gWorld.putXOR( posX, i );
		_gWorld.putXOR( endX, i );
	}
}