zigzag~
Description
Use zigzag~ to generate multisegment linear ramps. This object is similar to line~, but retains information about the ramp after it has been output, and allows modification of the list values for the ramp.
Examples

Discussion
The zigzag~ object uses a linked list implementation rather than the line~ object's stack-based implementation, which does not retain information after it has been output. In addition to simply remembering the current "line", the zigzag~ object lets you modify the list by inserting, deleting, or appending points.
Each element in the zigzag~ object's linked list has a value (y), and a transition time value (delta-x), which specifies the amount of time over which the transition from one value to another will occur. When zigzag~ contains a list, this list can be triggered (the starting and ending points can be set and changed), traversed forwards or backwards at different speeds, and looped. The current position in the list can be jumped to, and also held.
Arguments
Attributes
loopmode [int]
The word
Possible values:
0 = 'No Loop'
( looping off )
1 = 'Forward'
( forward looping on )
2 = 'Palindrome'
( palindrome looping )
mode [int]
zigzag~ object responds to messages and signal values.
mode 0 (default): When the zigzag~ object receives a , it will jump to the start point (or end point if our direction is negative) and begin outputting values from there. The time value associated with this jump has its length defined by the message. The default value for is . If a signal is connected to the left inlet of the zigzag~ object in this mode, the current index of the list is determined by the signal; any previously set , , , and messages are ignored.
mode 1: behavior is exactly the same as in mode 0 in terms of the effect of a . In mode 1, signal inputs are handled differently. If a signal is connected to the left inlet of the zigzag~ object in mode 1, the input signal functions as a trigger signal; when the slope of the input signal changes from non-negative to negative, the object will be re-triggered as though a were received.
mode 2: jump to the next index in the list (or the previous index, if the current direction is negative) and begin outputting values from there. The time value associated with this jump has its length defined by the message. The default value for is . If a signal is connected to the left inlet of the zigzag~ object in mode 2, the input signal functions as a trigger signal; when the slope of the input signal changes from non-negative to negative, the object will be re-triggered as though a were received.
Common Box Attributes
Messages
bang
If the zigzag~ object is set to mode 0 or mode 1, a message will cause the zigzag~ object to go to the start point (or end point if the direction is negative) and begin outputting values from there.
If the zigzag~ object is set to mode 2, a message will cause the zigzag~ object to jump to the next index in the list (or the previous index, if the current direction is negative) and begin outputting values from there.
int
Arguments
In right inlet: Specifies the rate at which the value and time pairs will be output. A value of 1.0 traverses the list forward at normal speed. A playback rate of -1 traverses the list backwards (i.e. in reverse). A value of .5 traverses the linked list at half the normal speed (effectively doubling the delay time values).
(In left inlet: Converted to float.)
float
Arguments
In right inlet: Specifies the rate at which the value and time pairs will be output. A value of 1.0 traverses the list forward at normal speed. A playback rate of -1 traverses the list backwards (i.e. in reverse). A value of .5 traverses the linked list at half the normal speed (effectively doubling the delay time values).
list
Arguments
append
Arguments
transition-time [number]
bangdelta
Arguments
bound
Arguments
end-index [int]
delete
Arguments
dump
will cause a list consisting of all currently stored value and time pairs in the formend
Arguments
insert
Arguments
jump
Arguments
jumpend
Arguments
jumpstart
Arguments
next
Arguments
prev
Arguments
ramptime
Arguments
setindex
Arguments
value [number]
transition-time [number]
signal
If the zigzag~ object is set to , the current index of the list is determined by the input signal value; any previously set , , , and messages will be ignored.
If a signal is connected to the left inlet of the zigzag~ object in , the input signal functions as a trigger signal; when the slope of the input signal changes from non-negative to negative, the object will be re-triggered as though a were received.
If a signal is connected to the left inlet of the zigzag~ object in , the input signal functions as a trigger signal; when the slope of the input signal changes from non-negative to negative, the object will be re-triggered as though a were received.
In right inlet: A signal value specifies the rate at which the value and time pairs will be output. A value of 1.0 traverses the list forward at normal speed. A playback rate of -1 traverses the list backwards (i.e. in reverse). A signal value of .5 traverses the linked list at half the normal speed (effectively doubling the delay time values). The value of the input signal is sampled once per input vector. Therefore, any periodic frequency modulation with a period which is greater than the current sample rate/(2*vector_size) will alias.
skip
Arguments
speed
Arguments
start
Arguments
stop
Output
bang
Out right outlet: When looping, a zigzag~ has finished generating all of its ramps.
message is sent out when the loop (re-trigger) point is reached. A is also sent out whenlist
Out 3rd outlet: In response to the dump message, a list consisting of all currently stored value and time pairs in the form
is output.
signal
Out 1st outlet: The current target value, or a ramp moving toward the target value according to the currently stored value and the target time.
Out 2nd outlet: The current index.
See Also
Name | Description |
---|---|
adsr~ | |
curve~ | |
kink~ | |
line~ |