10a

2021/sketch_2021_01_10a/sketch_2021_01_10a.pyde

@@ -0,0 +1,67 @@
+"""
+Based PythagorasTree
+https://rosettacode.org/wiki/Pythagoras_tree#Processing
+Processing 3.5.4
+2016-06-08 Trizen
+2020-03-02 da8
+2020-03-17 Alexandre Villares (Python Mode)
+
+Task: Construct a Pythagoras tree of order 7 using only vectors (no rotation or trigonometric functions).
+
+Related tasks
+ 
+Fractal tree (https://rosettacode.org/wiki/Fractal_tree)
+"""
+
+def setup():
+    size(800, 400)
+    background(0)
+    tree(width / 2.3, height, width / 1.8, height, 10)
+    save_image()
+
+def tree(x1, y1, x2, y2, depth):
+    r = lambda: random(-3, 3)
+    
+    if depth <= 0:
+        return
+    
+    dx = (x2 - x1) + r()
+    dy = (y1 - y2) + r()
+
+    x3 = (x2 - dy) + r()
+    y3 = (y2 - dx) + r()
+    x4 = (x1 - dy) + r()
+    y4 = (y1 - dx) + r()
+    x5 = (x4 + 0.5 * (dx - dy)) + r()
+    y5 = (y4 - 0.5 * (dx + dy)) + r()
+
+    fill(100, 255.0 / depth, 100, 128 + 128.0 / depth)
+    noStroke()
+
+    # square
+    beginShape()
+    vertex(x1, y1)
+    vertex(x2, y2)
+    vertex(x3, y3)
+    vertex(x4, y4)
+    vertex(x1, y1)
+    endShape()
+
+    # triangle
+    beginShape()
+    vertex(x3, y3)
+    vertex(x4, y4)
+    vertex(x5, y5)
+    vertex(x3, y3)
+    endShape()
+
+    tree(x4, y4, x5, y5, depth - 1)
+    tree(x5, y5, x3, y3, depth - 1)
+
+
+def save_image():
+    from os import path
+    sketch = sketchPath()
+    name = path.basename(sketch)
+    print(name)
+    saveFrame('{}.png'.format(name))

README.md

@@ -26,6 +26,12 @@ Here are listed some of the tools I have been using:
 
 ---
 
+![sketch_2021_01_10a](2021/sketch_2021_01_10a/sketch_2021_01_10a.png)
+
+[sketch_2021_01_10a](https://github.com/villares/sketch-a-day/tree/master/2021/sketch_2021_01_10a) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
+---
+
 ![sketch_2021_01_09a](2021/sketch_2021_01_09a/sketch_2021_01_09a.gif)
 
 [sketch_2021_01_09a](https://github.com/villares/sketch-a-day/tree/master/2021/sketch_2021_01_09a) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]