Drop CR state

Refs #134

2024/cr20240412/README.md

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+# Zero Overhead Code Retreat
+
+## Market Place
+
+Kata: Langston's Ant
+* Requirements Change
+* Multisensorisches Feedback?
+
+Constraint/Method: Interactive Programming
+
+Fun:
+* Welche Sprache ist am spaßigsten?
+* Welches Kata ist am spaßigsten?
+* Welches Constraint ist am spaßigsten?
+
+Neu: Neue Sprache
+* Kann man an einem Tag eine Sprache lernen?
+
+
+## Session 1: Langston's Ant Interactive Programming
+
+XP practices (vs?) TDD
+
+Kontinuierliche Visualisierung, damit man gleich sieht, was das Programm macht
+
+Im Programm State ändern? Hot Reload?
+
+
+## Session 2: Langston's Ant Interactive Programming II
+
+https://squeak.js.org/etoys/
+
+![](./session2/etoys-screenshot.png)
+

2024/cr20240412/session1/langstons-ant.py

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+# ---
+# jupyter:
+#   jupytext:
+#     text_representation:
+#       extension: .py
+#       format_name: percent
+#       format_version: '1.3'
+#       jupytext_version: 1.16.0
+#   kernelspec:
+#     display_name: Python 3 (ipykernel)
+#     language: python
+#     name: python3
+# ---
+
+# %% [markdown]
+# # Langston's Ant
+# ## What do we work on? ⬜🐜⬛
+#
+# ![](https://upload.wikimedia.org/wikipedia/commons/0/09/LangtonsAntAnimated.gif)
+#
+# ## Langston's ant! ⬜🐜⬛
+#
+# Squares on a plane are colored either black or white.
+#
+# An "ant" behaves like this
+#
+# - at white square, turn 90° clockwise, flip the color of the square
+# - at black square, turn 90° counter-clockwise, flip the color of the square,
+#
+# then move forward one unit.
+
+# %%
+grid = "wwbw"
+grid
+
+# %%
+w = "w"
+b = "b"
+grid = [[w,w],[b,w]]
+grid
+
+
+# %%
+ant = [[0,0],["^", 0]]
+
+# %%
+import numpy as np
+import matplotlib.pyplot as plt
+
+
+# %%
+grid = np.array([[0,0],[1,0]])
+grid
+
+# %%
+plt.pcolormesh(np.flipud(grid), cmap="gray_r")
+
+# %%
+DIRECTIONS = ["^", ">", "v", "<"]
+
+class Ant:
+    def __init__(self, coordinates, direction):
+        self.coordinates = coordinates
+        self.direction = direction
+    def __repr__(self): 
+        return f"Ant({self.coordinates},{self.direction})"
+    def move(self):
+        self.coordinates[1] += 1
+        self.direction= DIRECTIONS[(DIRECTIONS.index(self.direction) + 1) % 4]
+
+ant = Ant([0, 0], "^")
+print(ant)
+ant.move()
+print(ant)
+ant.move()
+print(ant)
+ant.move()
+print(ant)
+ant.move()
+ant
+
+
+# %%
+
+# %%
+def drawLangton(grid, ant):
+
+    fig,ax = plt.subplots()
+    ax.pcolormesh(np.flipud(grid), cmap="gray_r")
+    ax.scatter(*(np.array(ant.coordinates)+np.array([0.5,0.5])), marker=ant.direction, color="red", s=1000)
+drawLangton(grid, ant)
+
+# %%
+# if ant.direction("^"):
+
+ant = Ant([0,0], '^')
+# move up
+ant.coordinates[1] += 1
+# move down
+ant.coordinates[1] -= 1
+# move right
+ant.coordinates[0] += 1
+
+ant
+
+# %%
+whos
+
+# %%
+drawLangton(grid, ant)
+
+# %%
+from time import sleep
+
+for tick in range (1,4):
+    ant.move()
+    drawLangton(grid, ant)
+    sleep(1)
+
+# %%
+from matplotlib.animation import FuncAnimation
+ant = Ant([0,0], '^')
+
+fig,ax = plt.subplots()
+quad = ax.pcolormesh(np.flipud(grid), cmap="gray_r")
+scatter = ax.scatter(*(np.array(ant.coordinates)+np.array([0.5,0.5])), marker=ant.direction, color="red", s=1000)
+
+def update(frame):
+    ant.move()
+    scatter.set_offsets(*(np.array(ant.coordinates)+np.array([0.5,0.5])))   
+    return scatter
+
+animation = FuncAnimation(fig, update, frames = 10, interval = 2000)
+animation
+
+# %%