Das deutsche Python-Forum

Code: Alles auswählen

#!/usr/bin/env python3
from PyQt5.QtCore import QLineF


def main():
    line = QLineF(1920, 504, 371, 1080)
    line.setLength(100)
    print(line.p2())


if __name__ == '__main__':
    main()

Code: Alles auswählen

In [508]: a = turtle.Vec2D(1920, 504); b = turtle.Vec2D(371, 1080)

In [509]: a + (b-a) * (100/abs(b-a))
Out[509]: (1826.27,538.85)

Code: Alles auswählen

In [518]: a = QVector2D(1920, 504); b = QVector2D(371, 1080)

In [519]: a + (b-a).normalized() * 100
Out[519]: PyQt5.QtGui.QVector2D(1826.2705078125, 538.8535766601562)

Code: Alles auswählen

#!/usr/bin/python3

from random import randint, choice
from time import monotonic, sleep
from PyQt5.QtGui import QVector2D

WIDTH = 1920
HEIGHT = 1080
SIDES = ["left", "right", "top", "bottom"]
start = monotonic()
line_length = randint(100, 500)


def calculate_random_point(exclude=None):

    remaining = [x for x in SIDES if x is not exclude]

    side = choice(remaining)

    if side == "left":
        x = 0
        y = randint(0, HEIGHT)
    elif side == "right":
        x = WIDTH
        y = randint(0, HEIGHT)
    elif side == "bottom":
        x = randint(0, WIDTH)
        y = HEIGHT
    elif side == "top":
        x = randint(0, WIDTH)
        y = 0
    return x, y, side


def main():

    start_point_x, start_point_y, position = calculate_random_point()
    end_point_x, end_point_y, _ = calculate_random_point(position)

    start_point = QVector2D(start_point_x, start_point_y)
    end_point = QVector2D(end_point_x, end_point_y)

    while True:

        elapsed = monotonic() - start

        line_start_point = start_point + (end_point - start_point).normalized() * elapsed
        line_end_point = start_point + (end_point - start_point).normalized() * line_length * elapsed


        print(f"Startpunkt ({start_point_x} / {start_point_y}), Endpunkt ({end_point_x} / {end_point_y}), Linienlänge: {line_length}"
              f"\nAnfang Linie ({line_start_point.x()} / {line_start_point.y()}),"
              f"\nEnde Linie ({line_end_point.x()} / {line_end_point.y()})"
              "\n================================================================")
        sleep(0.5)


if __name__ == '__main__':
    main()