-
-
Notifications
You must be signed in to change notification settings - Fork 20
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
3 changed files
with
251 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,128 @@ | ||
|
||
def create_points(non_intersecting=True): | ||
background(200) | ||
done = False | ||
while not done: | ||
poly_points = [PVector(random(BORDER, width - BORDER), | ||
random(BORDER, height - BORDER) | ||
) | ||
for _ in range(NUM)] | ||
ed = edges(poly_points) | ||
done = True | ||
if non_intersecting: | ||
for p1, p2 in ed[::-1]: | ||
for p3, p4 in ed[2::]: | ||
# test only non consecutive edges | ||
if (p1 != p3) and (p2 != p3) and (p1 != p4): | ||
if line_instersect(Line(p1, p2), Line(p3, p4)): | ||
done = False | ||
break | ||
return poly_points | ||
|
||
def is_inside(x, y, poly_points): | ||
min_, max_ = min_max(poly_points) | ||
if x < min_.x or y < min_.y or x > max_.x or y > max_.y: | ||
return False | ||
|
||
a = PVector(x, min_.y) | ||
b = PVector(x, max_.y) | ||
v_lines = inter_lines(Line(a, b), poly_points) | ||
if not v_lines: | ||
return False | ||
|
||
a = PVector(min_.x, y) | ||
b = PVector(max_.x, y) | ||
h_lines = inter_lines(Line(a, b), poly_points) | ||
if not h_lines: | ||
return False | ||
|
||
for v in v_lines: | ||
for h in h_lines: | ||
if line_instersect(v, h): | ||
return True | ||
|
||
return False | ||
|
||
|
||
def inter_lines(L, poly_points): | ||
inter_points = [] | ||
for p1, p2 in edges(poly_points): | ||
inter = line_instersect(Line(p1, p2), L) | ||
if inter: | ||
inter_points.append(inter) | ||
if not inter_points: | ||
return [] | ||
inter_lines = [] | ||
if len(inter_points) > 1: | ||
inter_points.sort() | ||
pairs = zip(inter_points[::2], inter_points[1::2]) | ||
for p1, p2 in pairs: | ||
if p2: | ||
inter_lines.append(Line(PVector(p1.x, p1.y), | ||
PVector(p2.x, p2.y))) | ||
return inter_lines | ||
|
||
|
||
class Line(): | ||
""" I should change this to a named tuple... """ | ||
def __init__(self, p1, p2): | ||
self.p1 = p1 | ||
self.p2 = p2 | ||
|
||
def plot(self): | ||
line(self.p1.x, self.p1.y, self.p2.x, self.p2.y) | ||
|
||
def line_instersect(line_a, line_b): | ||
""" | ||
code adapted from Bernardo Fontes | ||
https://github.com/berinhard/sketches/ | ||
""" | ||
|
||
x1, y1 = line_a.p1.x, line_a.p1.y | ||
x2, y2 = line_a.p2.x, line_a.p2.y | ||
x3, y3 = line_b.p1.x, line_b.p1.y | ||
x4, y4 = line_b.p2.x, line_b.p2.y | ||
|
||
try: | ||
uA = ((x4-x3)*(y1-y3) - (y4-y3)*(x1-x3)) / ((y4-y3)*(x2-x1) - (x4-x3)*(y2-y1)); | ||
uB = ((x2-x1)*(y1-y3) - (y2-y1)*(x1-x3)) / ((y4-y3)*(x2-x1) - (x4-x3)*(y2-y1)); | ||
except ZeroDivisionError: | ||
return | ||
|
||
if not(0 <= uA <= 1 and 0 <= uB <= 1): | ||
return | ||
|
||
x = line_a.p1.x + uA * (line_a.p2.x - line_a.p1.x) | ||
y = line_a.p1.y + uA * (line_a.p2.y - line_a.p1.y) | ||
|
||
return PVector(x, y) | ||
|
||
|
||
def edges(poly_points): | ||
return pairwise(poly_points) + [(poly_points[-1], poly_points[0])] | ||
|
||
def pairwise(iterable): | ||
import itertools | ||
"s -> (s0,s1), (s1,s2), (s2, s3), ..." | ||
a, b = itertools.tee(iterable) | ||
next(b, None) | ||
return zip(a, b) | ||
|
||
def min_max(points): | ||
points = iter(points) | ||
try: | ||
p = points.next() | ||
min_x, min_y = max_x, max_y = p.x, p.y | ||
except StopIteration: | ||
raise ValueError, "min_max requires at least one point" | ||
for p in points: | ||
if p.x < min_x: | ||
min_x = p.x | ||
elif p.x > max_x: | ||
max_x = p.x | ||
if p.y < min_y: | ||
min_y = p.y | ||
elif p.y > max_y: | ||
max_y = p.y | ||
return (PVector(min_x, min_y), | ||
PVector(max_x, max_y)) |
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,123 @@ | ||
# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day | ||
SKETCH_NAME = "s300" # 20181025 | ||
OUTPUT = ".png" | ||
GRID_SIZE = 16 | ||
|
||
from line_geometry import edges | ||
from line_geometry import Line | ||
from line_geometry import inter_lines | ||
|
||
def setup(): | ||
global xo, yo | ||
size(500, 500) | ||
init_grid(GRID_SIZE) | ||
|
||
def draw(): | ||
background(200) | ||
for c in Cell.cells: | ||
c.plot() | ||
|
||
def init_grid(grid_size): | ||
Cell.border = 50 | ||
Cell.spacing = (width - Cell.border * 2) / grid_size | ||
Cell.cells = [] | ||
|
||
for x in range(0, grid_size, 2): | ||
for y in range(0, grid_size, 2): | ||
new_cell = Cell(x, y) | ||
Cell.cells.append(new_cell) | ||
Cell.grid[x, y] = new_cell | ||
|
||
Node.nodes = [] | ||
for x in range(-1, grid_size+1, 2): | ||
for y in range(-1, grid_size+1, 2): | ||
new_node = Node(x, y) | ||
#Cell.cells.append(new_node) # mudar! | ||
Cell.grid[x, y] = new_node # extrarir do dict | ||
|
||
for c in Cell.cells: | ||
c.update_vers() | ||
|
||
class Node(): | ||
nodes = [] | ||
grid = dict() | ||
|
||
def __init__(self, x, y): | ||
self.ix = x | ||
self.iy = y | ||
self.px = Cell.border + Cell.spacing + x * Cell.spacing | ||
self.py = Cell.border + Cell.spacing + y * Cell.spacing | ||
if x/2 % 3: self.px += random(-10, 10) | ||
if y/2 % 3: self.py += random(-10, 10) | ||
self.x = self.px | ||
self.y = self.py | ||
self.v = PVector(self.x, self.y) | ||
|
||
class Cell(): | ||
cells = [] | ||
grid = dict() | ||
vers = [] | ||
|
||
def __init__(self, x, y): | ||
self.ix = x | ||
self.iy = y | ||
self.px = Cell.border + Cell.spacing / 2 + x * Cell.spacing | ||
self.py = Cell.border + Cell.spacing / 2 + y * Cell.spacing | ||
self.vers = [] | ||
|
||
def plot(self): | ||
stroke(0) | ||
strokeWeight(1) | ||
for l in self.lines: | ||
l.plot() | ||
beginShape() | ||
noFill() | ||
stroke(0) | ||
strokeWeight(2) | ||
for p in self.vers: | ||
vertex(p.x, p.y) | ||
endShape(CLOSE) | ||
|
||
def update_vers(self): | ||
self.v0 = Cell.grid.get((self.ix-1, self.iy-1)) | ||
self.v1 = Cell.grid.get((self.ix-1, self.iy+1)) | ||
self.v3 = Cell.grid.get((self.ix+1, self.iy-1)) | ||
self.v2 = Cell.grid.get((self.ix+1, self.iy+1)) | ||
self.vers = [v for v in [self.v0, self.v1, self.v2, self.v3] if v] | ||
self.hatch() | ||
|
||
def hatch(self): | ||
poly_points = self.vers | ||
# min_, max_ = min_max(poly_points) | ||
self.lines = [] | ||
s = int(random(3, 7)) | ||
r = random(10) | ||
if r > 5: | ||
for y in range(-height, height*2, s): | ||
a = PVector(-width, y - self.v0.y/2.) | ||
b = PVector(width*2, y + self.v0.y/3.) | ||
lines = inter_lines(Line(a, b), poly_points) | ||
for l in lines: | ||
self.lines.append(l) | ||
if r < 6: | ||
for x in range(-width, width*2, s): | ||
a = PVector(x + self.v2.x/2., -height) | ||
b = PVector(x - self.v2.x/3., height*2,) | ||
lines = inter_lines(Line(a, b), poly_points) | ||
for l in lines: | ||
self.lines.append(l) | ||
|
||
def keyPressed(): | ||
if key == "n": | ||
init_grid(GRID_SIZE) | ||
if key == "s": saveFrame("###.png") | ||
|
||
# print text to add to the project's README.md | ||
def settings(): | ||
println( | ||
""" | ||
![{0}]({0}/{0}{2}) | ||
{1}: [code](https://github.com/villares/sketch-a-day/tree/master/{0}) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)] | ||
""".format(SKETCH_NAME, SKETCH_NAME[1:], OUTPUT) | ||
) |