event-stream | [Class] |
An abstract class implementing most of the basic input and output protocol.
event-stream provides the following slots to all score file and event stream subclasses:
See Also:
About Openexpl power &key :y0 :y1 :base :return-type | [Function] |
Returns an exponential value between :y0 and :y1 according to power, which ranges from 0 to 1. When power is 0 :y0 is returned, when power is 1 :y1 is returned. :y0 and :y1 default to 0 and 1, respectively. :base determines the slope of the exponential curve, if it is less than 1 then the exponential curve is concave, otherwise a convex curve is produced. The default value of :base is 2. The type of the value returned normally depends on the type of the arguments specified to the function. Use :return-type to force the return value to be either float, integer or ratio. float may be specified as a list (float digits) in which case the floating point return value will be rounded to digitnumber of places.
Example:
? (expl 0 5 1 1/256) 0.0 ? (expl 1 5 1 1/256) 5.0 ? (expl .5 5 1 1/256) 1.235 ;;; create envelope ramping from 3 to .5 ? (loop for i to 1 by .2 append (list i (expl i 3 .5 1/256))) (0 3.0 0.2 1.31 0.4 0.76 0.6 0.58 0.8 0.51 1.0 0.5)
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explseg, explsegs, fit, rescaleexplseg i length sum power &key :return-type | [Function] |
Returns the ith segment of length number of exponential segments whose values sum to sum. The exponential curve is defind by power, where 0<power<1 yields concave slopes and power>1 yields convex slopes. The type of the value returned normally depends on the type of the arguments specified to the function. Use :return-type to force the return value to be either float, integer or ratio. float may be specified as a list (float digits) in which case the floating point return value will be rounded to digitnumber of places.
See Also:
expl, explsegsexplsegs length sum power &key :return-type | [Function] |
Like explseg but returns all length number of segments in a list.
Example:
? (setf l (explsegs 4 10 2)) (1.8920711500272102 2.250064473703739 2.6757926813433408 3.18207169492571) ? (apply #'+ l) 10.0
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expl, explsegexpr expression | [Macro] |
#e expression | [Read Macro] |
Creates a pattern item out of expression. The item is evaluated each time it is encountered in the pattern.
Example:
? (setf x (items a #e(between 1 5) b)) #<CYCLIC-ITEM-STREAM 131337161> ? (read-items x 12) (A 2 B A 1 B A 4 B A 4 B)
See Also:
fn