TrackScreenUtils.h

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//**************************************************************************/
// Copyright (c) 1998-2006 Autodesk, Inc.
// All rights reserved.
// 
// These coded instructions, statements, and computer programs contain
// unpublished proprietary information written by Autodesk, Inc., and are
// protected by Federal copyright law. They may not be disclosed to third
// parties or copied or duplicated in any form, in whole or in part, without
// the prior written consent of Autodesk, Inc.
//**************************************************************************/
#pragma once



// Macros for converting track screen coords to time and back.
#define TimeToScreen(t,scale,scroll) (int(floor((t)*(scale)+0.5)) - (scroll))

#define ScreenToTime(s,scale,scroll) ((int)floor((s)/(scale) + (scroll)/(scale)+0.5))

#define ValueToScreen(v,h,scale,scroll) (h-int(floor((v)*(scale)+0.5)) - (scroll))

#define ScreenToValue(s,h,scale,scroll) ((float(h)-(float(s)+float(scroll)))/(scale))

// Scales a value about an origin
#define ScaleAboutOrigin(val,origin,scale) ((((val)-(origin))*(scale))+(origin))