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Convert GeoGebra constructions into high-quality SVG images and MP4 animations using manim

Project description

AnimaGeo

Installation

pip install --upgrade animageo

Using in terminal

animageo test.ggb -s default.json -px 240 auto

Description:

usage: animageo [-h] [-o OUTPUT] [-px PX PX] [-s STYLE] [-d] ggbfile

Converting GeoGebra construction file into SVG image.

positional arguments:
  ggbfile              GeoGebra file to convert

options:
  -h, --help           show this help message and exit
  -o, --output OUTPUT  SVG file to export into
  -px PX PX            image width and height in px (values: num or auto)
  -s, --style STYLE    JSON file with style definitions
  -d, --debug          print options

Using in code

  1. Prepare code scene.py:
from animageo import *

class TestScene(AnimaGeoScene):
    def construct(self):
        # ............................................................
        # Load geometric construction directly from GeoGebra-file     
        self.loadGGB('scene.ggb', style_file = 'default.json', px_size = [400, 'auto'])
        
        # ............................................................
        # Load your own simplified python-style Code-file for manipulations with geometric construction
        # - add new vars and elements
        # - change previous definitions
        self.loadCode('scene_code.py')

        # ............................................................
        # Stylize elements using their names from GeoGebra-file or from your Code-file
        # - use any predefined attributes from style_file or from Manim
        self.element('a').style['stroke'] = self.style.col 
        self.element('A_1').style['fill'] = self.style.col_accent

        # ............................................................
        # Export current scene to image with px_size width/height
        self.exportSVG('scene.svg')

        # ............................................................
        # Do whatever you do with Manim, but also specific things:

        # - add special ValueTracker and link it to Var in geometric construction
        x = self.addVar('x', 5)

        # - use predefined methods to Show, Hide and Update geometric elements without animation
        self.HideAll()
        self.Show(['A', 'B'])

        # - use predefined methods to Show, Hide and Update geometric elements with animation
        self.playShow(['a'])
        self.element('b').style['stroke_opacity'] = 0.5
        self.playUpdate(['b'])

        # - use tracker values for animation
        self.addUpdater(x)
        self.play(x.animate.set_value(10))
        self.clearUpdater(x)

        # - you may also want to change geometric elements as Manim objects (but without affecting geometric construction)
        a = self.mobject('a')
        b = self.mobject('b')
        self.play(VGroup(a, b).animate.arrange(buff=1).shift(DOWN))
        self.play(FadeOut(a, b))        

and code scene_code.py:

from animageo.dsl import *   # IDE-only; dropped by DSL transform at runtime

A = Point(x, 0)
B = Intersect(b, c)
a = Segment(A, B)
  1. Run compilation:
manim 'scene.py' TestScene

Style definitions in JSON

JSON-стиль делится на пять верхнеуровневых секций:

  • presets — semantic constants: цвета, размеры, толщины и структуры;
  • defaults — per-type baseline, обычно ссылками на presets;
  • overlay — post-import стилизация и автоматика;
  • rendering — настройки рендера и пайплайна;
  • import — правила импорта GGB-значений + встроенная ImportPolicy.

Полный пример:

{
    "name": "default",
    "version": 0.1,

    "presets": {
        "color": {
            "main": "#2581b5",
            "bold": "#000000",
            "aux": "#808080",
            "accent": "#ef60ab",
            "background": "#ffffff",
            "strong": "#000000"
        },
        "point_size":  { "main": 7, "bold": 9,   "aux": 5 },
        "line_width":  { "main": 2, "bold": 2.5, "aux": 1.5 },
        "angle_radius": { "main": 20, "shift": 3, "right": 14 },
        "tick":  { "main": { "tick_width_px": 1, "tick_length_px": 12, "tick_shift_px": 4 } },
        "arrow": { "main": { "arrow_width_px": 7.5, "arrow_length_px": 10.5 } },
        "font_size": { "main": 17 }
    },

    "defaults": {
        "point": {
            "size_px": "presets.point_size.main",
            "fill": "presets.color.strong"
        },
        "segment": {
            "$include": "presets.tick.main",
            "stroke_width_px": "presets.line_width.main"
        },
        "vector": {
            "$include": ["presets.tick.main", "presets.arrow.main"]
        },
        "angle": {
            "arc_size_px": "presets.angle_radius.main",
            "arc_shift_px": "presets.angle_radius.shift",
            "stroke_width_px": "presets.line_width.aux"
        }
    },

    "rendering": {
        "background":             "presets.color.background",
        "line_cap":               "round",
        "right_angle_joint":      "miter",
        "polygon_boundary_layer": "top",
        "points_display":         "only_labels",
        "scale_export":           0.75
    },

    "import": {
        "colors": {
            "#1565c0":     "main",
            "#1565c0 0.1": "main 0",
            "#d32f2f":     "accent",
            "#d32f2f 0.1": "accent_light 1",
            "#616161":     "aux",
            "#000000 0.6": "main",
            "#000000 0.1": "light 1",
            "#1565c0 0":   "white 1",
            "#d32f2f 0":   "white 1"
        },
        "point_size": { "5": "main" },
        "line_width": { "5": "main", "3": "aux" }
    }
}

rendering — настройки рендера

Ключ Значения Эффект
background hex или presets.color.* фон canvas / camera background
line_cap "butt" | "round" | "square" окончания линий
right_angle_joint "auto" | "bevel" | "miter" | "round" соединение сторон прямого угла
polygon_boundary_layer "top" | null "top" — контур полигона поверх заливки (z-index=10). Касается сегментов-сторон, создаваемых автоматически GeoGebra
points_display "auto" | "only_labels" | "only_points" скрыть точки / надписи глобально
label_anchor одна из 9 позиций ("TL""BR", "MC" и т. д.) default-якорь подписей
scale_export число множитель px_size и общего масштаба экспорта
angle_radius объект опциональное авто-скалирование радиуса дуги по мере угла
label_placement объект параметры автораскладки подписей

import — правила импорта из GeoGebra

Ключ Тип Назначение
colors dict "#hex [opacity]" → "color_name [opacity]" ремап цветов из GGB на presets.color
point_size dict "N" → "preset_name" маппинг GGB-размера точек на пресет из presets.point_size
line_width dict "N" → "preset_name" маппинг GGB-толщины линий на пресет из presets.line_width
policy объект ImportPolicy гибкие правила конверсии (scalar/DSL/callable), per_type/per_name. См. docs/import_policies.md

Миграция со старой схемы

Если у вас стили в старом формате (style.dot.*, technic, ggb_export на верхнем уровне), прогоните скрипт:

python scripts/migrate_style_json.py --in-place path/to/style.json

Полная таблица «было → стало» — в docs/style_guide/migration.md. Полный справочник всех имён через 5 слоёв (GGB / animageo / JSON / manim / SVG) — в docs/field_names.md.

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