Using Inputs and Outputs

To illustrate how to use inputs and outputs we’ll write a javascript code that solves quadratic equations.

More information on quadratic equations can be found here.

In the Javascript node, configure the Inputs and Outputs tab in the Editor panel:

Code

To use these inputs and outputs in our code, call them using the exact same name and spelling used in those two tabs.

In the Main section of the script write the following code:

delta = b*b - 4*a*c
if (delta >= 0) {
   x1 = (-b + Math.sqrt(delta)) / 2*a
   x2 = (-b - Math.sqrt(delta)) / 2*a
}
else {
   var imPart = Math.sqrt(-delta) / 2*a
   var rePart = -b / 2*a
   x1 = rePart + " + " + imPart + "i"
   x2 = rePart + " - " + imPart + "i"
}

!Warning : The inputs and outputs will appear on the node with a capitalized first letter. This is an automatic behaviour of Kinetic Designer’s Graph Editor.
However, take care to call them in your code using the exact same, case-sensitive way they are declared in the Inputs and Outputs tabs.

Result

In this example the equation y = x² - 3x -10 has two different solutions because Δ>0. The solutions are x1 = 5 and x2 = -2