’15 -’16 General Discussion for Lesson 5.17


#1

Use this thread to discuss your questions and comments about how to run the lesson.


#2

Re: setting a random stroke color in the canvas:

We’ve tried a bunch of ways to use setStrokeColor to set a random color, but I think we’re running into an issue where because the function accepts the parameter as a string, we can’t use randomNumber function for rgb values. We’ve also tried setting variables for the red, blue, and green separately and calling them in the setStrokeColor function, to no avail.

We’ve found a (kind of lame) workaround by creating an array made up of different colors, then calling for a random index using randomNumber – this works, but isn’t as “random” as we would like it, if that makes sense.


#3

Hey Michael,

You’re correct there is no random color function. I’ve made use of the following function in the past when trying to do what I believe you are.

function randomColor(){
  var r = randomNumber(0,255);
  var g = randomNumber(0,255);
  var b = randomNumber(0,255);
  //Create a string in the format "rgb(255, 100, 0)" and return it
  var colorString = "rgb(" + r + "," + g + "," + b + ")";
  return colorString; 
}

// In your code you can then call
setStrokeColor(randomColor());
// or to make the steps more explicit instead do
var newRandomColor = randomColor();
setStrokeColor(newRandomColor);

Let me know if that helps!
GT


#4

That’s AWESOME. Makes perfect sense – setStrokeColor requires a string, so create a function that will return a string. Thank you!!!


#5

Glad that helped! :smile:


#6