Fall 2015, The College of Saint Rose

Lecture 8: Custom Objects
Date: Friday, September 25, 2015

Agenda

Due at the start of class, Wednesday, September 30.

Please submit answers to these questions either as a hard copy (typeset or handwritten are OK) or by email to terescoj AT strose.edu by the start of class. Please use a clear subject line when submitting by email (e.g., CSC 112 Lecture 8 Assignment , Joe Student). We will discuss these questions at the start of class, so no late submissions are accepted.

1. For a bit more practice with constructive solid geometry, create a three-dimensional Pac Man object, with his mouth open. You need not run this in Python/Ambrosia or generate an image, but you may do so if you wish. (6 points):
2. Write (or type) out an Ambrosia definition for a tetrahedron constructed as a Mesh object. You need not run this in Python/Ambrosia or generate an image, but you may do so if you wish. Recall that a tetrahedron is a polyhedron (like the cube and pyramid we saw in class) except that it has just four faces and are all triangles. Your tetrahedron should be centered at the origin and have one of its points facing up and aligned on the y-axis, but you need not worry about keeping all of the faces the same size.

Note: ensuring a regular tetrahedron - where all four faces are equilateral triangles - would require some careful calculations using trigonometric relations. We will construct a regular tetrahedron in class, but you need not do so in your submission. (8 points)

Terminology

• mesh
• polygon
• co-planar
• cross section

Examples