C++ (Cpp) RectI::GetWidth示例

void Actor::ScaleTo( const RectI &rect, StretchType st )
{
	// width and height of rectangle
	float rect_width = (float) rect.GetWidth();
	float rect_height = (float) rect.GetHeight();

	if( rect_width < 0 )	SetRotationY( 180 );
	if( rect_height < 0 )	SetRotationX( 180 );

	// center of the rectangle
	float rect_cx = rect.left + rect_width/2;
	float rect_cy = rect.top  + rect_height/2;

	// zoom fActor needed to scale the Actor to fill the rectangle
	float fNewZoomX = fabsf(rect_width  / m_size.x);
	float fNewZoomY = fabsf(rect_height / m_size.y);

	float fNewZoom = 0.f;
	switch( st )
	{
	case cover:
		fNewZoom = fNewZoomX>fNewZoomY ? fNewZoomX : fNewZoomY;	// use larger zoom
		break;
	case fit_inside:
		fNewZoom = fNewZoomX>fNewZoomY ? fNewZoomY : fNewZoomX; // use smaller zoom
		break;
	}

	SetXY( rect_cx, rect_cy );
	SetZoom( fNewZoom );
}