import sys
import os
sys.path.append(os.getcwd())
import supershape
from math import sqrt
from math import sin, cos, radians
from pypaint.context import Context
from pypaint.types.color import Color
from pypaint.utils.p_random import random
ctx = Context(width=600, height=600)
def radial_gradient(colors, x, y, radius, steps=200):
""" Radial gradient using the given list of colors. """
def _step(colors, i, n):
l = len(colors)-1
a = int(1.0*i/n*l)
a = min(a+0, l)
b = min(a+1, l)
base = 1.0 * n/l * a
d = (i-base) / (n/l)
r = colors[a].r*(1-d) + colors[b].r*d
g = colors[a].g*(1-d) + colors[b].g*d
b = colors[a].b*(1-d) + colors[b].b*d
return Color(r, g, b)
for i in range(steps):
ctx.fill(_step(colors, i, steps))
for i in _range(points):
pt = path.point(float(i)/points)
phi = i * range / points
dx, dy = supercalc(m, n1, n2, n3, phi)
if first:
ctx.beginpath(pt.x+dx, pt.y+dy)
first = False
else:
ctx.lineto(pt.x+dx, pt.y+dy)
return ctx.endpath(draw=False)
if __name__ == "__main__":
from pypaint.context import Context
ctx = Context(width=400, height=400)
def setup():
global x, y, w, h, m, n1, n2, n3, i
x, y = 200, 200
w, h = 100, 100
m = 6.0
n1 = 1.0
n2 = 1.0
n3 = 1.0
i = 0.0
def draw():
global x, y, w, h, m, n1, n2, n3, i
from pypaint.context import Context
from pypaint.types.canvas import BezierPath
from pypaint.utils.p_random import random
from math import pi, sin, cos, radians
ctx = Context(width=600, height=600)
class Tendril:
def __init__(self, x, y, width=15):
"""
A new sinewy tendril at location x and y.
Its segment width will gradually become smaller as it grows.
"""
self.x = x
self.y = y
self.width = width
self.angle = random(2*pi) - pi ## random angle in radians.
self.segments = []
self.v = 0
def grow(self, distance=3.0, curl=1.0, step=0.02):
""" Tendril segment growth using fluid, spiral sine functions,
taken from the ART+COM Tendrils class for Processing.
"""
## Think of a tendril having a steering compass.
## For each new segment, the compass shifts a bit left or right.
self.x += cos(self.angle) * distance
self.y += sin(self.angle) * distance
self.v += random(-step, step)