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Alexei Bezborodov
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SVG
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‎brython/draw_tree.html

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<!-- Copyright 2024 by Alexei Bezborodov <[email protected]> -->
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<!-- Общественное достояние (public domain) -->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title>Ёлочка</title>
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<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/[email protected]/brython.min.js"></script>
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<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/[email protected]/brython_stdlib.js"></script>
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</head>
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<body onload="brython()">
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<h1 class="text-center">Ёлочка</h1>
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<canvas id="draw-board" width="500" height="500"></canvas>
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<script type="text/python">
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from browser import document, html, window
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canvas = document["draw-board"]
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ctx = canvas.getContext("2d")
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# Чёрный экран
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ctx.fillStyle = "black"
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w = canvas.width # ширина
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h = canvas.height # высота
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ctx.fillRect(0, 0, w, w)
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# Функция рисования линии
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def DrawLine(x1, y1, x2, y2, color, lineWidth):
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ctx.strokeStyle = color
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ctx.lineWidth = lineWidth
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ctx.beginPath()
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ctx.moveTo(x1, y1)
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ctx.lineTo(x2, y2)
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ctx.stroke()
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return
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# Рисование ёлочки
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w2 = w/2
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c = 'green'
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lw = 10
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for j in range(2):
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x = w2
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y = 10
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znak = -1
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if j == 1:
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znak = 1
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for i in range(1,15):
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delta = 4 * i
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next_x = x + delta * znak
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next_y = y + delta
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DrawLine(x, y, next_x, next_y, c, lw)
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x = next_x - delta / 2 * znak
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y = next_y
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DrawLine(next_x, next_y, x, y, c, lw)
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print('🎄')
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</script>
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</body>
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</html>

‎brython/fractal_svg.html

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<!-- Copyright 2024 by Alexei Bezborodov <[email protected]> -->
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<!-- License: Public domain: http://unlicense.org/ -->
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<!-- Общественное достояние -->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title>Фрактал SVG</title>
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<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/[email protected]/brython.min.js"></script>
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<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/[email protected]/brython_stdlib.js"></script>
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</head>
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<body onload="brython()">
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<h1 class="text-center">Фрактал SVG</h1>
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<p id="out_svg"></p>
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<script type="text/python">
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from browser import document, html, window
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def Print2String(*args, **kwargs):
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newstr = ""
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for a in args:
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newstr += str(a) + ''
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return newstr
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color_black = "black"
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color_test_rgb = "rgb(100,255,0)"
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def SvgDrawRect(svg, x, y, width, height, color, line_color, line_width):
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svg += [Print2String("<rect x='",x,"' y='",y,"' width='", width,"' height='", height,"' style=\"fill:",color,";stroke-width:",line_width,";stroke:",line_color,"\" />")]
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def SvgDrawLine(svg, x1, y1, x2, y2, color, width):
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svg += [Print2String("<line x1='",x1,"' y1='", y1,"' x2='",x2,"' y2='",y2,"' style=\"stroke:",color,";stroke-width:",width,"\" />")]
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def SvgMake(svg, width, height):
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result = Print2String("<svg width='",width,"' height='",height,"' xmlns=\"http://www.w3.org/2000/svg\" xmlns:svg=\"http://www.w3.org/2000/svg\">")
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for c in svg:
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result += c
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result += "</svg>"
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return result
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def SvgDrawSquare(svg, x1, y1, x2, y2, x3, y3, x4, y4, color, width):
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SvgDrawLine(svg, x1, y1, x2, y2, color, width)
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SvgDrawLine(svg, x2, y2, x3, y3, color, width)
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SvgDrawLine(svg, x3, y3, x4, y4, color, width)
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SvgDrawLine(svg, x1, y1, x4, y4, color, width)
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def SvgDrawSquareFractal(svg, x1, y1, x2, y2, x3, y3, x4, y4, color, width, dep):
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if dep < 1:
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return
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SvgDrawSquare(svg, x1, y1, x2, y2, x3, y3, x4, y4, color, width)
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koef = 0.15
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SvgDrawSquareFractal(svg, x1 + (x2 - x1) * koef, y1 + (y2 - y1) * koef, x2 + (x3 - x2) * koef, y2 + (y3 - y2) * koef, x3 + (x4 - x3) * koef, y3 + (y4 - y3) * koef, x4 + (x1 - x4) * koef, y4 + (y1 - y4) * koef, color, width, dep - 1)
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svg = []
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w = 500
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h = 500
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SvgDrawRect(svg, 0, 0, w, h, color_black, color_black, 1)
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SvgDrawSquareFractal(svg, 0, 0, w, 0, w , h, 0, h, color_test_rgb, 3, 37)
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document["out_svg"].innerHTML = SvgMake(svg, w, h)
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</script>
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</body>
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</html>

‎rand_learn.txt

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s = "1 + 1 = 2"
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s = s.replace("1", "один")
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s = s.replace("2", "два")
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s = s.replace("3", "три")
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s = s.replace("4", "четыре")
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print(s)
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exit()
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import random
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a = 1323
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def rand():
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global a
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a = (a * 234 + 234235) % 1000
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return a
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for i in range(20):
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#print(random.randint(1, 10))
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print(rand())
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exit()
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s = "@rand_int + @rand_int"
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print(s.replace("@rand_int", str(random.randint(-15, 15)), 1))
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exit()
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def full_replace(s):
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c = None
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while c != s:
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c = s
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s = s.replace("@rand_int", str(random.randint(-15, 15)), 1)
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return s
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print(full_replace(s))

‎simple_pygame.py

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# https://proglib.io/p/samouchitel-po-python-dlya-nachinayushchih-chast-21-osnovy-razrabotki-igr-na-pygame-2023-05-29
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import pygame
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import random
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pygame.init()
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screen_width = 640
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screen_height = 480
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screen = pygame.display.set_mode((screen_width, screen_height))
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# цвета окружностей
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white = (255, 255, 255)
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red = (255, 0, 0)
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green = (0, 255, 0)
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blue = (0, 0, 255)
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black = (0, 0, 0)
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yellow = (255, 255, 0)
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# цвет, скорость, начальная позиция окружности
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circle_radius = 30
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circle_speed = 3
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circle_color = random.choice([red, green, blue, yellow, white])
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circle_pos = [screen_width//2, -circle_radius]
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circle_landed = False
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# список приземлившихся окружностей и их позиций
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landed_circles = []
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while True:
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for event in pygame.event.get():
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if event.type == pygame.QUIT:
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pygame.quit()
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quit()
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# если окружность не приземлилась
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if not circle_landed:
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# меняем направление по нажатию клавиши
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keys = pygame.key.get_pressed()
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if keys[pygame.K_LEFT]:
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circle_pos[0] -= circle_speed
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if keys[pygame.K_RIGHT]:
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circle_pos[0] += circle_speed
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# проверяем, столкнулась ли окружность с другой приземлившейся окружностью
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for landed_circle in landed_circles:
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landed_rect = pygame.Rect(landed_circle[0]-circle_radius, landed_circle[1]-circle_radius, circle_radius*2, circle_radius*2)
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falling_rect = pygame.Rect(circle_pos[0]-circle_radius, circle_pos[1]-circle_radius, circle_radius*2, circle_radius*2)
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if landed_rect.colliderect(falling_rect):
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circle_landed = True
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collision_x = circle_pos[0]
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collision_y = landed_circle[1] - circle_radius*2
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landed_circles.append((collision_x, collision_y, circle_color))
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break
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# если окружность не столкнулась с другой приземлившейся окружностью
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if not circle_landed:
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# окружность движется вниз
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circle_pos[1] += circle_speed
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# проверяем, достигла ли окружность дна
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if circle_pos[1] + circle_radius > screen_height:
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circle_pos[1] = screen_height - circle_radius
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circle_landed = True
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# добавляем окружность и ее позицию в список приземлившихся окружностей
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landed_circles.append((circle_pos[0], circle_pos[1], circle_color))
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if circle_landed:
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# если окружность приземлилась, задаем параметры новой
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circle_pos = [screen_width//2, -circle_radius]
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circle_color = random.choice([red, green, blue, yellow, white])
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circle_landed = False
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# рисуем окружности
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screen.fill(black)
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for landed_circle in landed_circles:
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pygame.draw.circle(screen, landed_circle[2], (landed_circle[0], landed_circle[1]), circle_radius)
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pygame.draw.circle(screen, circle_color, circle_pos, circle_radius)
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pygame.display.update()
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# частота обновления экрана
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pygame.time.Clock().tick(60)
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‎svg_example.txt

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<svg width="1000" height="1000">
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<title>Attribute Animation with SMIL</title>
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<rect x="0" y="0" width="100" height="100" stroke="black" stroke-width="1" >
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<set
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attributeName="y"
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to="500"
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begin="1s"
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/>
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<set
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attributeName="y"
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to="300"
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begin="5s"
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/>
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</rect>
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</svg>
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<svg width="1000" height="1000">
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<title>Attribute Animation with SMIL</title>
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<rect x="0" y="0" width="100" height="100" stroke="black" stroke-width="1" >
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<animate
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attributeName="y"
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from="0"
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to="500"
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begin="0s"
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dur="5s"
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repeatCount="indefinite" />
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</rect>
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</svg>
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