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

Lesson 1: Modeling grass with parabolas

# Start here!

Overview of modeling grass with parabolas

# Welcome to environment modeling!

In this topic we're going to explore how realistic blades of grass are modeled using parabolic arcs.
This topic contains two lessons:

#### Lesson 1: Modeling grass with parabolas

• Appropriate for grades five and up
• Design your own blade of grass using midpoints and simulate it as a flowing field.

#### Lesson 2: Calculating parabolas

• Appropriate for grades nine to 12
• Discover the equation used at Pixar to efficiently draw parabolic arcs.

## Want to join the conversation?

• what is/are parabolic arcs?
• A parabolic arc is a section of a parabola. A parabola is a curve whose equation is in the form y = ax^2 + bx + c

• Is it possible to code a parabolic arc like the one shown above using one or two for loops and a line?
• Is this how people to animation? Its cool!
• Mathematics are used throughout the Pixar in a Box course, and computers have the capability to convert math equations into full-scale movies. ;)
• This page says that lesson 2 is appropriate for the high school level. Why is that? Is there anything I need to learn especially for that lesson?
• probably because there might be some math that you learn in 9th to 12th grade which you might need here
(1 vote)
• What grade would be considered high school level for lesson 2?
• The first part of lesson 2 is appropriate for all ages, the second lesson is closer to a grade 9 level. Remember you can do these lessons in any order as well!
• What point are you guys making here in this article and besides it only tells of the blades of grass using parabolic arcs?