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[code] The Mandelbrot script now uses complex numbers.

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Change-Id: I47f14d414c86c09f85093c201d16ef71ce028510
This commit is contained in:
Léa Saviot
2017-11-21 10:13:35 +01:00
parent a9f4da92c0
commit 95bf921138
1 changed files with 5 additions and 10 deletions
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15
apps/code/script_template.cpp
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@@ -30,22 +30,17 @@ def fibo2(n):
constexpr ScriptTemplate mandelbrotScriptTemplate("mandelbrot.py", R"(# This script draws a Mandelbrot fractal set
# N_iteration: degree of precision
import kandinsky
N_iteration = 10
def drawMandlebrot():
def mandelbrot(N_iteration):
for x in range(320):
for y in range(222):
# Compute the mandelbrot sequence for the point c = (c_r, c_i) with start value z = (z_r, z_i)
z_r = 0
z_i = 0
z = complex(0,0)
# Rescale to fit the drawing screen 320x222
c_r = 2.7*x/319-2.1
c_i = -1.87*y/221+0.935
c = complex(3.5*x/319-2.5, -2.5*y/221+1.25)
i = 0
while (i < N_iteration) and ((z_r * z_r) + (z_i * z_i) < 4):
while (i < N_iteration) and abs(z) < 2:
i = i + 1
stock = z_r
z_r = z_r * z_r - z_i * z_i + c_r
z_i = 2 * stock * z_i + c_i
z = z*z+c
# Choose the color of the dot from the Mandelbrot sequence
rgb = int(255*i/N_iteration)
col = kandinsky.color(int(rgb),int(rgb*0.75),int(rgb*0.25))