Homework 4 Rubric

Submission and Other (10 Points)

Code	Points	Description
A1	2	Submission is zip containing nbody folder with python files
A2	2	Zip is named after uni, unzips to folder with uni-hw4
A3	3	Python files have correct names/imports
A4	3	Python files have good style

Part 1 - generateObjects (30 points)

Code	Points	Description
B1	5	Code produces a 3 x `count` list/array of floats
B2	5	Test case 1
B3	5	Test case 2
B4	5	Test case 3
B5	5	Test case 4
B6	2	Function is in the proper file
B7	3	Good Style (No globals, comments, well named vars)

Test Cases:

generateObjects(0) -> []
generateObjects(3) -> List/array of 3 lists/arrays, first and second between -5 and 5, third between 0 and 100
generateObjects(3, 0, 0, 0) -> [[0.0, 0.0, 0.0], [0.0, 0.0, 0.0], [0.0, 0.0, 0.0]]
generateObjects(3, 10, 1, 1) -> 3 lists/arrays of length 3, first and second postiions within 0.5 of 10.0, third is between 0 and 1

Part 2 - plotObjects (30 points)

Code	Points	Description
C1	10	Code runs and produces correct output for `plotObjects(generateObjects(100))`
C2	10	Code runs and produces correct output for `plotObjects(generateObjectsNormal(100))`
C3	5	Function is in the proper file
C4	5	Good Style (No globals, comments, well named vars)

Part 3 - forceVec (30 points)

Code	Points	Description
D1	5	Code takes two 3x1 lists/arrays and returns two float values or list of length 2
D2	5	Test Case 1
D3	5	Test Case 2
D4	5	Test Case 3
D5	5	Test Case 4
D6	2	Function is in the proper file
D7	3	Good Style (No globals, comments, well named vars)

Note: Small differences are fine due to floating point error

Test Cases:

forceVec([0.0, 0.0, 0.0], [3.0, 4.0, 0.0]) -> 0.0, 0.0
forceVec([0.0, 0.0, 1000.0], [3.0, 4.0, 1000.0]) -> ~1.601, ~2.135
forceVec([-3.0, -4.0, 1000.0], [3.0, 4.0, 1000.0]) -> ~0.40, ~0.53 (or ~0.80, ~1.067 due to numerical issues)
forceVec([-3.0, -4.0, 1000.0], [-6.0, -8.0, 1000.0]) -> ~ -1.601, ~ -2.135 (or ~0.32, ~0.42 due to numerical issues)