24 e 25

2021/sketch_2021_11_24b/sketch_2021_11_24b.pyde

@@ -0,0 +1,80 @@
+# Alexandre B A Villares - https://abav.lugaralgum.com/
+# To run this you will need Processing 3.5.4 + Python mode, instructions at: 
+# https://abav.lugaralgum.com/como-instalar-o-processing-modo-python/index-EN.html
+
+"""
+segs on a 3 x 3, grid
+"""
+
+add_library('pdf')
+from itertools import product, combinations, permutations
+from villares.line_geometry import edges_as_sets, simple_intersect
+import pickle
+
+space, border = 15, 15
+name = "segs"
+
+def setup():
+    size(1830, 930)
+    grid = product((-1, 0, 1), (-1, 0, 1))  # 3X3
+    points = list(grid)
+    segs = create_lines(points)
+    print(len(segs))
+    W = (width - border * 2) // space
+    H = (height - border * 2) // space
+    println("Cols: {} Rows: {} Visible grid: {}".format(W, H, W * H))
+    # High res PDF export
+    f = createGraphics(width * 10, height * 10,
+                       PDF, name + '.pdf')
+    beginRecord(f) # begin PDF export
+    f.scale(10)
+    strokeJoin(ROUND)
+    strokeWeight(1.5)
+    # start drawing
+    background(240)
+    i = 0
+    for y in range(H):
+        for x in range(W):
+            if i < len(segs):
+                pushMatrix()
+                translate(border / 2 + space + space * x,
+                          border / 2 + space + space * y)
+                fill(0)
+                draw_segs(scale_segs(segs[i], space * 0.38))
+                popMatrix()
+                i += 1
+    # end PDF export
+    endRecord()
+    saveFrame(name + '.png')
+
+def draw_segs(seg_list):
+    for seg in seg_list:
+        beginShape()
+        for p in seg:
+                vertex(p[0], p[1])
+            endShape()
+    
+
+def scale_segs(p_list, s):
+    return [[(p[0] * s, p[1] * s) for p in l_list] for l_list in p_list]
+
+
+def create_lines(points):
+    all_lines = list(combinations(points, 2))
+    return list(combinations(all_lines, 3))
+    
+
+def collapsed(seg):
+    for i, c in enumerate(seg):
+        a = seg[i - 2]
+        b = seg[i - 1]
+        if triangle_area(a, b, c) == 0:
+            return True
+    return False
+
+def triangle_area(a, b, c):
+    return (a[0] * (b[1] - c[1]) +
+            b[0] * (c[1] - a[1]) +
+            c[0] * (a[1] - b[1]))
+    
+    

2021/sketch_2021_11_25b/sketch_2021_11_25b.pyde

@@ -0,0 +1,85 @@
+# Alexandre B A Villares - https://abav.lugaralgum.com/
+# To run this you will need Processing 3.5.4 + Python mode, instructions at: 
+# https://abav.lugaralgum.com/como-instalar-o-processing-modo-python/index-EN.html
+
+"""
+segs on a 3 x 3, grid
+"""
+
+add_library('pdf')
+from itertools import product, combinations, permutations
+
+space, border = 20, 20
+name = "segs"
+
+def setup():
+    size(1830, 930)
+    grid = product((-1, 0, 1), (-1, 0, 1))  # 3X3
+    points = list(grid)
+    segs = create_lines(points)
+    print(len(segs))
+    W = (width - border * 2) // space
+    H = (height - border * 2) // space
+    println("Cols: {} Rows: {} Visible grid: {}".format(W, H, W * H))
+    # High res PDF export
+    f = createGraphics(width * 10, height * 10,
+                       PDF, name + '.pdf')
+    beginRecord(f) # begin PDF export
+    f.scale(10)
+    strokeJoin(ROUND)
+    strokeWeight(1.5)
+    # start drawing
+    background(240)
+    i = 0
+    for y in range(H):
+        for x in range(W):
+            if i < len(segs):
+                pushMatrix()
+                translate(border / 2 + space + space * x,
+                          border / 2 + space + space * y)
+                fill(0)
+                draw_segs(scale_segs(segs[i], space * 0.38))
+                popMatrix()
+                i += 1
+    # end PDF export
+    endRecord()
+    saveFrame(name + '.png')
+
+def draw_segs(seg_list):
+    for seg in seg_list:
+        beginShape()
+        for p in seg:
+                vertex(p[0], p[1])
+        endShape()
+    
+
+def scale_segs(p_list, s):
+    return [[(p[0] * s, p[1] * s) for p in l_list] for l_list in p_list]
+
+def create_lines(points):
+    all_lines = list(combinations(points, 2))
+    return [
+        combo for combo in combinations(all_lines, 3)
+        if not collapsed(combo)
+        ]
+    
+def collapsed(segs):
+    s0, s1, s2 = segs
+    for seg_a, seg_b in [(s0, s1), (s0, s2), (s1, s2)]:
+        pts = set(seg_a) | set(seg_b)
+        if len(pts) == 3:
+            a, b, c = pts
+        else:
+            continue 
+        if triangle_area(a, b, c) > 0:
+            continue
+        else:
+            return True
+    
+def triangle_area(a, b, c):
+    return (a[0] * (b[1] - c[1]) +
+            b[0] * (c[1] - a[1]) +
+            c[0] * (a[1] - b[1]))
+    
+
+    

README.md

@@ -26,6 +26,18 @@ Here are listed some of the tools I have been using:
 ## [2018](2018.md) | [2019](2019.md) | [2020](2020.md) | 2021
 
 
+---
+
+![sketch_2021_11_25b](2021/sketch_2021_11_25b/sketch_2021_11_25b.png)
+
+[sketch_2021_11_25b](https://github.com/villares/sketch-a-day/tree/master/2021/sketch_2021_11_25b) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
+---
+
+![sketch_2021_11_24b](2021/sketch_2021_11_24b/sketch_2021_11_24b.png)
+
+[sketch_2021_11_24b](https://github.com/villares/sketch-a-day/tree/master/2021/sketch_2021_11_24b) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
+
 ---
 
 ![sketch_2021_11_23b](2021/sketch_2021_11_23b/sketch_2021_11_23b.png)