From f687a4bcd51a79775ad1d428a0b94636550a9d15 Mon Sep 17 00:00:00 2001
From: "E. Almqvist" <elalmqvist@gmail.com>
Date: Tue, 10 May 2022 16:44:19 +0200
Subject: [PATCH] Mandel

---
 mas/fractals/mandel.py | 49 ++++++++++++++++++++++++++++++++++++------
 1 file changed, 43 insertions(+), 6 deletions(-)

diff --git a/mas/fractals/mandel.py b/mas/fractals/mandel.py
index 7fa6d0a..6293537 100755
--- a/mas/fractals/mandel.py
+++ b/mas/fractals/mandel.py
@@ -2,8 +2,45 @@
 
 import pygame 
 
+W, H = 500, 500
+ITER = 5
+
+class Point:
+    def __init__(self, x, y):
+        self.x = x
+        self.y = y
+
+    def square(self):
+        self.x = self.x**2 - self.y**2
+        self.y = 2*self.x*self.y
+
+    def add(self, p2):
+        self.x += p2.x
+        self.y += p2.y
+
+
+def mandel(n: int, c: Point):
+    if n == 0:
+        return Point(0, 0)
+    else:
+        newp = mandel(n-1, c)
+        newp.square()
+        newp.add(c)
+        return newp
+
+print("Plotting...")
+plots = {}
+for x in range(0, W):
+    for y in range(0, H):
+        print(f"{x=} {y=}", end="\r")
+        z = mandel(ITER, Point(x - W/2, y - H/2))
+        plots[(x,y)] = (0, 0, 0) if z.x < 2 else (255, 255, 255)
+
+
+print("Init render")
 pygame.init()
-window = pygame.display.set_mode( (1600, 900) )
+window = pygame.display.set_mode( (W, H) )
+
 
 run = True
 while run:
@@ -13,12 +50,12 @@ while run:
 
 
     window.fill(0)
-    space = pygame.Rect(window.get_rect().center, (0, 0)).inflate(*([min(window.get_size())//2]*2))
 
-    for x in range(space.width):
-        y = 2*x 
-        col = (255, 255, 255)
-        window.set_at((space.left + x, space.bottom - y), col)
+    for coord in plots:
+        x, y = coord
+        col = plots[coord]
+        window.set_at(coord, col)
+
 
     pygame.display.flip()