trapezoid~
Trapezoidal wavetable
Description
trapezoid~ is a trapezoidal wavetable with signal inputs to change ramp up/down phase position. The default lo/hi points are 0. and 1., but may be changed using the lo/hi messages.
Arguments
ramp-up[float]
optional
A floating-point value can be used to specify the ramp up value. The arguments 0. 0. produce a ramp waveform, and 0.5 0.5 produces a triangle waveform.
ramp-down[float]
optional
A floating-point value can be used to specify the ramp down value. The arguments 0. 0. produce a ramp waveform, and 0.5 0.5 produces a triangle waveform.
Attributes
hi[float]
Sets the maximum value of trapezoid~ for signal output. The default value is 1.0
lo[float]
Sets the minimum value of trapezoid~ for signal output. The default value is 0.
wrapmode[int]: 1
Controls how the leftmost phase signal input is handled when it is outside the range 0 - 1.
Possible values:
0 = 'Clip'
(
Clip input
)
When wrapmode is set to 0 (Clip), the phase is clipped to stay between 0 and 1.
1 = 'Wrap'
(
Wrap Input
)
When wrapmode is set to 1 (Wrap), phase values above 1 use the decimal part of the number only. For example, an input of 4.3 will be treated as 0.3. Phase values below 0 will have the decimal part of the value subtracted from 1. For example an input of -0.4 will be treated as 0.6.
Common Box Attributes
annotation[symbol]
Sets the text that will be displayed in the Clue window when the user moves the mouse over the object.
background[int]: 0
Adds or removes the object from the patcher's background layer. background 1 adds the object to the background layer, background 0 removes it. Objects in the background layer are shown behind all objects in the default foreground layer.
color[4 floats]
Sets the color for the object box outline.
fontface[int]
Sets the type style used by the object. The options are:
plain
bold
italic
bold italic
Possible values:
0 = 'regular'
1 = 'bold'
2 = 'italic'
3 = 'bold italic'
fontname[symbol]
Sets the object's font.
fontsize[float]
Sets the object's font size (in points).
Possible values:
'8'
'9'
'10'
'11'
'12'
'13'
'14'
'16'
'18'
'20'
'24'
'30'
'36'
'48'
'64'
'72'
hint[symbol]
Sets the text that will be displayed in as a pop-up hint when the user moves the mouse over the object in a locked patcher.
ignoreclick[int]: 0
Toggles whether an object ignores mouse clicks in a locked patcher.
jspainterfile[symbol]
You can override the default appearance of a user interface object by assigning a JavaScript file with code for painting the object. The file must be in the search path.
patching_rect[4 floats]: 0. 0. 100. 0.
Sets the position and size of the object in the patcher window.
position[2 floats]
write-only
Sets the object's x and y position in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its size unchanged.
presentation[int]: 0
Sets whether an object belongs to the patcher's presentation.
presentation_rect[4 floats]: 0. 0. 0. 0.
Sets the x and y position and width and height of the object in the patcher's presentation, leaving its patching position unchanged.
rect[4 floats]
write-only
Sets the x and y position and width and height of the object in both patching and presentation modes (if the object belongs to its patcher's presentation).
size[2 floats]
write-only
Sets the object's width and height in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its position unchanged.
textcolor[4 floats]
Sets the color for the object's text in RGBA format.
textjustification[int]
Sets the justification for the object's text.
Possible values:
0 = 'left'
1 = 'center'
2 = 'right'
varname[symbol]
Sets the patcher's scripting name, which can be used to address the object by name in pattr, scripting messages to thispatcher, and the js object.
Messages
float
In left inlet: Any float or signal or an input signal progressing from 0 to 1 is used to scan the trapezoid~ object's wavetable. The output of a phasor~ or some other audio signal can be used to control trapezoid~ as an oscillator, treating the contents of the wavetable as a repeating waveform.
In middle inlet: The ramp up portion of the trapezoidal waveform, specified as a fraction of a cycle between 0 and 1.0. The default is .1.
In right inlet: The ramp up portion of the trapezoidal waveform, specified as a fraction of a cycle between 0 and 1.0. The default is 0.9.
- trapezoidal-control
[float]
signal
In left inlet: Any float or signal or an input signal progressing from 0 to 1 is used to scan the trapezoid~ object's wavetable. The output of a phasor~ or some other audio signal can be used to control trapezoid~ as an oscillator, treating the contents of the wavetable as a repeating waveform.
In middle inlet: The ramp up portion of the trapezoidal waveform, specified as a fraction of a cycle between 0 and 1.0. The default is .1.
In right inlet: The ramp up portion of the trapezoidal waveform, specified as a fraction of a cycle between 0 and 1.0. The default is 0.9.
Output
signal
A signal which corresponds to the value referenced by the trapezoid~ object's input signal. If the output of a phasor~ or some other audio signal is used to scan the trapezoid~ object, the output will be a periodic waveform.
See Also
| Name | Description |
|---|---|
| buffer~ | Store audio samples |
| cos~ | Signal cosine function (0-1 range) |
| phasor~ | Generate sawtooth signals |
| updown~ | Trapezoidal Function Generator With Constant Attack and Release |
| wave~ | Variable size wavetable |