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add hw pdfs, fix error in hw2

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Renge 2022-09-20 13:54:10 -04:00
parent 4b3fafc1d9
commit 1dd392370a
8 changed files with 376 additions and 48 deletions
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HW1/hw1.pdf Normal file
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HW2/HW2.html
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@ -1000,13 +1000,14 @@ hue-6-2: #e6c07b
</li> </li>
<li> <li>
<ol start="2"> <ol start="2">
<li>Wrong, counter example, c is the smallese angle but c is not a part of convex hull. <li>Wrong, counter example, c is the smallest angle but c is not a part of convex hull.
<img src="file:////home/renge/Documents/CSE 355/HW2/2_2_2.png" alt="2_2_2"></li> <img src="file:////home/renge/Documents/CSE 355/HW2/2_2_2.png" alt="2_2_2"></li>
</ol> </ol>
</li> </li>
<li> <li>
<ol start="3"> <ol start="3">
<li>Correct, base on Akl–Toussaint heuristic, for a set of points, the one with the highest y coordinate must be a part of the convex hull.</li> <li>Wrong, counter example, c is the highest point but if we include c this is not a conven hull.<br>
<img src="file:////home/renge/Documents/CSE 355/HW2/2_2_3.png" alt="2_2_3"></li>
</ol> </ol>
</li> </li>
<li> <li>

7
HW2/HW2.md
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@ -65,8 +65,9 @@
- QuickHull(p7 , p3 , {p1}) - QuickHull(p7 , p3 , {p1})
- 2. - 2.
- 1. Correct, this is basically the same as Graham scan. - 1. Correct, this is basically the same as Graham scan.
- 2. Wrong, counter example, c is the smallese angle but c is not a part of convex hull. - 2. Wrong, counter example, c is the smallest angle but c is not a part of convex hull.
![2_2_2](2_2_2.png) ![2_2_2](2_2_2.png)
- 3. Correct, base on Akl–Toussaint heuristic, for a set of points, the one with the highest y coordinate must be a part of the convex hull. - 3. Wrong, counter example, c is the highest point but if we include c this is not a conven hull.
![2_2_3](2_2_3.png)
- 4. Correct, this is a Ellipse with same focuses but different axis. The one with longer axis must contain the one with shorter axis but not vise versa. Thus, the point with highest sum must be a part of convex hull. - 4. Correct, this is a Ellipse with same focuses but different axis. The one with longer axis must contain the one with shorter axis but not vise versa. Thus, the point with highest sum must be a part of convex hull.
- 5. Wrong, same graph as question 2, C is the one with minimal distance sum however it is not a part of convex hull. - 5. Wrong, same graph as question 2, C is the one with minimal distance sum however it is not a part of convex hull.

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HW2/hw2-quickhull.ipe
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@ -1,7 +1,7 @@
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<text transformations="translations" pos="64 752" stroke="black" type="label" width="7.472" height="6.808" depth="0" valign="baseline">A</text>
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144 720 m
128 640
128 640 c
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128 640 m
64 752 l
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64 752 m
96 736 l
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96 736 m
144 720 l
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