Module description

These are macros used when working with Track View to scale into and out of screen space.

Macros
#define	TimeToScreen(t, scale, scroll) (int(floor((t)*(scale)+0.5)) - (scroll))
	Given a TimeValue t, if you have the time scale and time scroll factors, this macro returns the screen space X for that time. More...

#define	ScreenToTime(s, scale, scroll) ((int)floor((s)/(scale) + (scroll)/(scale)+0.5))
	Given a screen coordinate s, if you have the scale and scroll factors, this macro will return a TimeValue for that screen position. More...

#define	ValueToScreen(v, h, scale, scroll) (h-int(floor((v)*(scale)+0.5)) - (scroll))
	Given a Value v, if you have the value scale and value scroll factors, this macro returns the screen space Y for that value. More...

#define	ScreenToValue(s, h, scale, scroll) ((float(h)-(float(s)+float(scroll)))/(scale))
	Given a screen coordinate s, if you have the scale and scroll factors, this macro will return a value for that screen position. More...

#define	ScaleAboutOrigin(val, origin, scale) ((((val)-(origin))*(scale))+(origin))

Macro Definition Documentation

Given a TimeValue t, if you have the time scale and time scroll factors, this macro returns the screen space X for that time.

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

Given a screen coordinate s, if you have the scale and scroll factors, this macro will return a TimeValue for that screen position.

Given a Value v, if you have the value scale and value scroll factors, this macro returns the screen space Y for that value.

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

Given a screen coordinate s, if you have the scale and scroll factors, this macro will return a value for that screen position.