- insertion sort
- selection sort
- bubble sort
- heap sort
- Quick Sort - in place
- Merge Sort
- Binary Search
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ffmpeg -i video.mp4 -r 10 -s 640x360 -q:v 2 -vframes 25 frame%03d.jpg | |
# -r = frames per second | |
# -vframes = number of total frames to extract | |
# -s = resolution (width x height) | |
# -q:v = quality of extracted frames, 1 (highest) to 31 (lowest quality) | |
# frame%03d.jpg = output path (i.e. frame000.jpg, frame001.jpg, ...) |
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input_file=example.mkv | |
output_file=example-nosound.mkv | |
ffmpeg -i $input_file -c copy -an $output_file |
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def sample_points_on_sphere(radius = 1, vres = 10, hres = 10): | |
""" Sample points on a sphere that has the given radius. | |
Args: | |
- vres: vertical resolution, the amount of heights at which the sphere will | |
be sampled, the vertical distances are sampled at even distances | |
- hres: horizontal resolution, same as vres but horizontally | |
""" | |
def sample(r, theta, phi): | |
x = r * np.sin(theta) * np.cos(phi) | |
y = r * np.sin(theta) * np.sin(phi) |
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// 0.809017 = (1.0f + sqrt(5.0f)) / 2 / 2 (half the length of the golden rectangle) | |
vertices: | |
(-0.809017, 0, 0.5) | |
(-0.809017, 0, -0.5) | |
(0.809017, 0, -0.5) | |
(0.809017, 0, 0.5) | |
(-0.5, 0.809017, 0) | |
(0.5, 0.809017, 0) | |
(0.5, -0.809017, 0) | |
(-0.5, -0.809017, 0) |