rotate 2d vector by angle
rotate vector (x1, y1) counterclockwise by the given angle
(angle in radians)
newX = oldX * cos(angle) - oldY * sin(angle)
newY = oldX * sin(angle) + oldY * cos(angle)rotate 2d vector by angle
rotate vector (x1, y1) counterclockwise by the given angle
(angle in radians)
newX = oldX * cos(angle) - oldY * sin(angle)
newY = oldX * sin(angle) + oldY * cos(angle)rotate matrix 90 degrees clockwise python
#rotate 90 deg clockwise
box=[["a","b"],["c","d"],["e","f"]]
rows = len(box)
cols = len(box[0])
box2 = [[""] * rows for _ in range(cols)]
for x in range(rows):
for y in range(cols):
box2[y][rows - x - 1] = box[x][y]rotate 2d array
#clockwise:
rotated = list(zip(*original[::-1]))
#counterclockwise:
rotated_ccw = list(zip(*original))[::-1]Copyright © 2021 Codeinu
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