Tirsvad
a34bf6bbc2
Challenge 1 draws four sides and turns right 90 degrees after each. Challenge 2 puts the pen down for a dash and up for a gap and leaves it down at the end. Lengths and counts come from constants.py; invalid values raise ValueError. Task: MIL-002#3 Task: MIL-002#4 Task: MIL-002#5
27 lines
745 B
Python
27 lines
745 B
Python
"""!
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@file square.py
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@brief Turtle Challenge 1: draw a square.
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"""
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from turtle_challenges.constants import (
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RIGHT_ANGLE_DEGREES,
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SQUARE_SIDE_LENGTH,
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SQUARE_SIDES,
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)
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from turtle_challenges.pen import Pen
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def draw_square(pen: Pen, side_length: float = SQUARE_SIDE_LENGTH) -> None:
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"""!
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@brief Draw a square: move forward, turn right, four times.
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@param pen The turtle that draws.
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@param side_length Length of each side, in turtle units.
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@exception ValueError If @p side_length is not positive.
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"""
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if side_length <= 0:
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raise ValueError(f"side_length must be positive, got {side_length}")
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for _ in range(SQUARE_SIDES):
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pen.forward(side_length)
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pen.right(RIGHT_ANGLE_DEGREES)
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