Vector Dot Product (Scalar Projection)

Nature of Code Lesson #5.6
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This video covers the dot product and scalar projection with p5.js and vectors, concepts that I’ll need for finding the distance between a point and a line which will lead to the path following steering behavior in the next video!

Topics

  • 0:00 - Welcome! What are we looking at today?
  • 1:01 - Explain! What is scalar projection?
  • 3:04 - Explain! How do we use dot product to find the scalar projection?
  • 6:13 - Code! Let's create a scalarProjection() function.
  • 8:01 - Code! Modifying the function to be vectorProjection().
  • 9:42 - Explain! How is this useful for path following?
  • 11:39 - Code! Let's see if it works for finding a point on a path?
  • 13:04 - Thanks for watching! See you in the next video about path following.
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