Lines in three dimensions and closest-point problems

What this note covers

1. Vector and parametric forms
2. Testing intersection
3. Parallel, intersecting or skew
4. Closest point on a line
5. Distance from point to line
6. Paths crossing versus collision
7. Three-dimensional lines: independent parameters, intersections and skew distance
8. Projection to a line and constrained closest-point problems

8 sections · 10 key terms & formulas · 6 common mistakes