Advanced Concepts for Transition Control Files

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Advanced Concepts for Transition Control Files

WinImages F/x's transition generator can use a built-in mathematical expression evaluator.

In order to use this, the evaluator must be passed:

An exclamation point (!) to begin the expression, adding this escape character is the only way an expression can be evaluated.
Valid characters:
- Parentheses: ),(
- Divistion and Multiplication: /,*
- Addition and Subtraction: +,-
- Power: ^
- Modulous: %
Valid functions: (described below)
The proper snytax when calling the time variable
A properly formatted mathematical function.
NO SPACES. A space designates that the argument is complete to the evaluator.

Note:

The variable called by "ttime(0)" returns the "current time". In a timeline, this returns the percentage of the timeline completed or the time value for a still.(all 0 to one)

The expression evaluator will accept these functions

Function	Details
abs(expression)	Absolute Value
acos(expression)	Arc-Cosine
asin(expression)	Arc-Sine
atan(expression)	Arc-Tangent
ceil(expression)	Ceiling (nearest whole number > expression)
cframe(0)	Returns current frame as number 1 to tframes()
cos(expression)	Cosine
cosh(expression)	Hyperbolic Cosine
deg(expression)	Converts radians to degrees
exp(expression)	Exponential
floor(expression)	Floor (nearest whole number < expression)
hyp(expression,expression)	Hypotenuse of X, Y
linv(expression)	Takes frame number as parameter, returns linear value 0 to (tframes(0)) as 0-1
log(expression)	Natural Log
log10(expression)	Log, base 10
loopv(expression)	Takes frame number as parameter, returns linear value 0 to (tframes(0)+1) as 0-1
rad(expression)	Converts degrees to radians
sin(expression)	Sine
sinh(expression)	Hyperbolic Sine
sqrt(expression)	Square Root
tan(expression)	Tangent
tanh(expression)	Hyperbolic Tangent
tframes(0)	Returns total number of frames in the sequence
ttime(0)	Returns the current value for time in the range 0 to one.

Note that all transcendental functions expect arguments in radians

An example using the expression evaluator

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WinImages F/x Manual Version 7, Revision 5, Level B