Triggers a list output of the current breakpoints from the middle-left outlet formatted for use by the line~ object. As an example, if the function contained breakpoints at X = 1, Y = 0; X = 10, Y = 1; and X = 20, Y = 0, the output would be 0, 1 9 0 10. If the optional output mode is enabled, the output would be 0 0 1 9 0 10.

If there are any sustain points in the function, bang outputs a list of all the points up to the sustain point. Additional points in the function, up to a subsequent sustain point or the end point, whichever applies, can be output by sending the next message. See the description of the next and sustain messages for additional information.

The value is taken as an X value and outputs a corresponding Y value out the left outlet. The Y value is produced by linear floating-point interpolation of the function. If the X value lies outside the first or last breakpoint, the Y value is 0.

The value is taken as an X value and outputs a corresponding Y value out the left outlet. The Y value is produced by linear floating-point interpolation of the function. If the X value lies outside the first or last breakpoint, the Y value is 0.

If the list contains two values, a new point is added to the function. The first value is X, the second is Y.

If the list contains three values, an existing point in the function is modified. The first value is the index (starting at 0) of a breakpoint to modify, the second is the new X value for the breakpoint, and the third is the new Y value for the breakpoint. (If the index number in the list refers to a breakpoint that does not exist, the message is ignored.)

The word clear by itself erases all existing breakpoints. The word clear can also be followed by one or more breakpoint indices (starting at 0) to clear selected breakpoints.

The word clearfix clears all fix states (sets them to 0).

The word clearsustain clears all sustain states (sets them to 0).

The message color, followed by an integer from 0-16, sets the color scheme for the function object. Each integer from 0-16 sets a different line color, while the grid color is always set to white, the text color is always set to black, and the background color is always set to grey.

The copy message copies all of the current function points to the clipboard so that they can be pasted into another function object.

Outputs a series of multiple element lists describing each break point out the function object's middle-right outlet. Each list contains the breakpoints X and Y values, followed by the curve value, if present. An optional symbol argument can be used to specify a receive objects as a destination.

The word fix, followed by a number specifying the index of a point and 0 or 1, prevents the user from changing the point if the second number is 1, and allows the user to change the point if the second number is 0. By default, points are moveable unless clickmove 0 has been sent to disable moving of all points.

The word getfix. with no arguments, will cause the function object to send a list all fix points out the object's middle-right outlet. If an index is provided as an argument, the fix state for that point will be output.

The word getsustain. with no arguments, will cause the function object to send a list all sustain points out the object's middle-right outlet. If an index is provided as an argument, the sustain state for that point will be output.

The word lineout followed by either 0, 1, or no argument is equivalent to the bang message.

Outputs a single list which contains all X and Y values for each of the breakpoints out the function object's middle-right outlet.An optional symbol argument can be used to specify a receive objects as a destination.

You can use the mouse to draw points in a line segment function; the finished function can then be sent to a line~ object for use as a control signal in MSP. Clicking on empty space in the function adds a breakpoint, which you can begin to move immediately by dragging (unless function has been sent the clickadd 0 message). Clicking on a breakpoint allows you to move the breakpoint by dragging (unless function has been sent the clickmove 0 message). The X and Y values of the breakpoint are displayed in the upper part of the object’s box. Shift-clicking on a breakpoint deletes that point from the function. Command-clicking on Macintosh or Control-clicking on Windows on a breakpoint toggles the sustain property of the point. Sustain points are outlined in white. Whenever an editing operation with the mouse is completed, a bang is sent out the right outlet.
Points with a Y value of 0 are outlined circles; other points are solid. This allows you to see at a glance whether a function starts or ends at Y = 0.

The next message continues a list output from the sustain point where the output of the last bang or next message ended. For instance, if the function contained breakpoints at (a) X = 1, Y = 0; (b) X = 10, Y = 1; and (c) X = 20, Y = 0, and point b was a sustain point, a bang message would output 0, 1 9 and a subsequent next message would output 1, 0 10. After a next message reaches the end point, a subsequent next message is equivalent to a bang message. next is also equivalent to a bang when no bang has been sent that reached a sustain point, or when a function contains no sustain points.

The word nth, followed by a number, uses the number as the index (starting at 0) of a breakpoint, and outputs the Y value of the breakpoint out the left outlet. If no breakpoint with the specified index exists, no output occurs.

The paste message pastes all of the points of a previously copied function into a function object.

This message will cause all of the points to automatically snap to the horizontal grid as defined by the gridstep_x attribute.

This message will cause all of the points to automatically snap to the vertical grid as defined by the gridstep_y attribute.

Given the number of points already defined within function 's graphic editor, a corresponding list of x-y-coordinate pairs will set the position of each point.

The word setcurve, followed by an integer that specifies the index of a function point (numbered from 1) and a floating point value that specifies a curve, will create a curved line segment between the specified point and the next point.

Curve factor values from 0 to 1.0 produce an "exponential" curve when increasing in value and values from -1.0 to 0 produce a "logarithmic" curve. The closer to 0 the curve parameter is, the closer the curve is to a straight line, and the farther away the parameter is from 0, the steeper the curve. The mode attribute must be set to 1 (curve mode) for this message to be effective.

The word setdomain, followed by a float or int value, sets the maximum displayed X value, then modifies the X values of all breakpoints so that they remain in the same place given the new domain.

The word setrange, followed by two float or int values, sets the minimum and maximum display range for Y values, then modifies the Y values of all breakpoints so that they remain in the same place given the new range.

The word sustain, followed by number specifying the index of a point and zero or one, turns that point into a sustain point if the second number is 1, or into a regular point if the second number is 0. By default, points are regular (non-sustain). The behavior of sustain points is discussed in the description of the bang message above. Command-clicking on Macintosh or Control-clicking on Windows also toggle the sustain property of a point.

The word xyc, followed by an two numbers that specifies X and Y values and a floating point number that specifies a curve factor, will add a new point with curve information to the function.

Curve factor values from 0 to 1.0 produce an "exponential" curve when increasing in value and values from -1.0 to 0 produce a "logarithmic" curve. The closer to 0 the curve parameter is, the closer the curve is to a straight line, and the farther away the parameter is from 0, the steeper the curve. The mode attribute must be set to 1 (curve mode) for this message to be effective.