Hello! This is my check-in for week 4, right before the first student evaluations. In the past month, I have implemented parabola-into-box and parabola-into-inverse sphere with the help of my mentors. Recently, I attempted box-into-capsule, but after discussion with my mentor, we decided that I would skip ahead to implementing the Heightfield class. I hope to revisit box-into-capsule, perhaps during the "code-break" week, to nail it down. In the meantime (starting week 5) I will begin implementing the Heightfield MVP: being able to construct it using a PNMImage, visualizing it, and an intersection test with an infinite line. Check back next week for more updates!