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! Code: https://thecodingtrain.com/tracks/the...

p5.js Web Editor Sketches:
🕹️ Angle Between: https://editor.p5js.org/codingtrain/s...
🕹️ Scalar Projection: https://editor.p5js.org/codingtrain/s...

🎥 Previous video:    • 5.5 Wander Steering Behavior - The Na...  
🎥 Next video:    • 5.7 Path Following (Steering) - Natur...  
🎥 All videos:    • The Nature of Code  

References:
🔗 Path Following: https://editor.p5js.org/natureofcode/...
🔗 Steering Behaviors for Autonomous Characters: http://www.red3d.com/cwr/steer/
🔗 Scalar Projection: https://en.wikipedia.org/wiki/Scalar_...
🔗 Vector Projection: https://en.wikipedia.org/wiki/Vector_...

Videos:
🎥 3D Rendering with Rotation and Projection:    • Coding Challenge #112: 3D Rendering w...  
🎥 Unit Vector (Normalize):    • 1.5 A Unit Vector (Normalize) - The N...  
🎥 Dot products and duality:    • Dot products and duality | Chapter 9,...  

Timestamps:
0:00 Welcome! What are we looking at today?
1:01 What is scalar projection?
3:04 How do we use dot product to find the scalar projection?
6:13 Let's create a scalarProjection() function.
8:01 Modifying the function to be vectorProjection().
9:42 How is this useful for path following?
11:39 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.

Editing by Mathieu Blanchette
Animations by Jason Heglund
Music from Epidemic Sound

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