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### Course: Pixar in a Box>Unit 11

Lesson 1: Modeling grass with parabolas

# 1. String art

Find out how we can make curved lines using straight ones using the string art construction.

## Want to join the conversation?

• wait, they color and draw and create EVERY SINGLE BLADE!
• They likely use combinatorics once they design every blade and colour type that they desire. After that, the artist will use this to paint the background like a patchwork tool.
• How can a complete parabola be an infinite curve? Wouldn't it soon come back to the beginning and form a circle?
• No, parabolas keep going forever, never looping back on themselves. They are one of the conic sections, along with circles and ellipses (which do loop back on themselves) and hyperbolae (which don't). See https://www.khanacademy.org/math/algebra2/conics_precalc for more information.
• So, how is this string art going to help us make a animated grass?
• It is just a tool to use to see how the curve can be modeled in the computer.
• What programs do I need on my computer to be able to practice with lessons of the videos?
• Hi Ingrid: As Brit said in the comment on your question, you don't need to install anything on your computer to do these lessons. You just need the internet browser on your computer you're using right now! Good luck! --Blue Leaf
• About how many animators does it take to make a 90 minute movie?
• According to IMDB, there were 29 animators who worked on Inside Out (2015). There were plenty more working technical, sound and visual effects department. Pixar movies are surely a team effort! http://www.imdb.com/title/tt2096673/fullcredits/
• In the beginning of the video, was Mark Andrews sparring with a real sword?
• no, it's blunted. like what they use in historical sword fighting classes (yes that is a real thing)
• HI Sir
which software i need to install for this course?
• You don't need to install anything, it all works in your browser.
• Is that a real sword?