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#!/usr/bin/python
"""
__version__ = "$Revision: 1.28 $"
__date__ = "$Date: 2004/09/28 04:12:11 $"
"""
from PythonCard import model, util
import math
import wx
# from PIDDLE/SPING color spectrum test
def bluefunc(x): return 1.0 / (1.0 + math.exp(-10*(x-0.6)))
def redfunc(x): return 1.0 / (1.0 + math.exp(10*(x-0.5)))
def greenfunc(x): return 1 - pow(redfunc(x+0.2),2) - bluefunc(x-0.3)
def genColors(n=100):
out = [None]*n;
for i in range(n):
x = float(i)/n
out[i] = (int(redfunc(x) * 255), int(greenfunc(x) * 255), int(bluefunc(x) * 255))
return out
class Hopalong(model.Background):
def on_initialize(self, event):
self.drawing = False
self.components.bufOff.backgroundColor = 'black'
self.components.bufOff.clear()
self.initSizers()
def initSizers(self):
sizer1 = wx.BoxSizer(wx.VERTICAL)
sizer2 = wx.BoxSizer(wx.HORIZONTAL)
comp = self.components
stcFlags = wx.LEFT | wx.BOTTOM | wx.ALIGN_CENTER
fldFlags = wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.ALIGN_CENTER
padding = 5
# Mac wxButton needs 7 pixels on bottom and right
macPadding = 7
sizer2.Add(comp.stcA, 0, stcFlags, padding)
sizer2.Add(comp.fldA, 0, fldFlags, padding)
sizer2.Add(comp.stcB, 0, stcFlags, padding)
sizer2.Add(comp.fldB, 0, fldFlags, padding)
sizer2.Add(comp.stcC, 0, stcFlags, padding)
sizer2.Add(comp.fldC, 0, fldFlags, padding)
sizer2.Add(comp.stcIterations, 0, stcFlags, padding)
sizer2.Add(comp.fldIterations, 0, fldFlags, padding)
sizer2.Add(comp.stcXOffset, 0, stcFlags, padding)
sizer2.Add(comp.fldXOffset, 0, fldFlags, padding)
sizer2.Add(comp.stcYOffset, 0, stcFlags, padding)
sizer2.Add(comp.fldYOffset, 0, fldFlags, padding)
sizer2.Add(comp.stcScale, 0, stcFlags, padding)
sizer2.Add(comp.fldScale, 0, fldFlags, padding)
sizer2.Add(comp.stcColors, 0, stcFlags, padding)
sizer2.Add(comp.fldColors, 0, fldFlags, padding)
sizer2.Add((5, 5), 1) # spacer
sizer2.Add(comp.btnDraw, 0, fldFlags, macPadding)
sizer2.Add(comp.btnCancel, 0, fldFlags, macPadding)
sizer1.Add(sizer2, 0, wx.EXPAND)
sizer1.Add(comp.bufOff, 1, wx.EXPAND)
sizer1.Fit(self)
sizer1.SetSizeHints(self)
self.panel.SetSizer(sizer1)
self.panel.SetAutoLayout(1)
self.panel.Layout()
def hopalong(self, a=30.0, b=1.0, c=0.9, iterations=100000,
xOffset=300.0, yOffset=300.0, scale=10.0, numColors=1000):
x = 0.0
y = 0.0
colors = genColors(numColors)
colorIter = iterations / len(colors)
#print iterations, len(colors), colorIter
sqrt = math.sqrt
for i in range(len(colors)):
points = []
for j in range(colorIter):
if x < 0:
temp = y + sqrt(abs(b * x - c))
else:
temp = y - sqrt(abs(b * x - c))
y = a - x
x = temp
points.append((xOffset + (x * scale), yOffset + (y * scale)))
# to speed up drawing, we only update when the color changes
yield (colors[i], points)
def doHopalong(self):
self.statusBar.text = "Drawing, please wait..."
canvas = self.components.bufOff
a = float(self.components.fldA.text)
b = float(self.components.fldB.text)
c = float(self.components.fldC.text)
iterations = int(self.components.fldIterations.text)
xOffset = float(self.components.fldXOffset.text)
yOffset = float(self.components.fldYOffset.text)
scale = float(self.components.fldScale.text)
numColors = int(self.components.fldColors.text)
totalPointsDrawn = 0
starttime = util.time()
canvas.clear()
for color, points in self.hopalong(a, b, c, iterations, xOffset, yOffset, scale, numColors):
canvas.foregroundColor = color
canvas.drawPointList(points)
totalPointsDrawn += len(points)
wx.SafeYield(self)
if not self.drawing:
break
elapsed = util.time() - starttime
self.statusBar.text = "hopalong time: %f seconds (%d points drawn)" % (elapsed, totalPointsDrawn)
self.drawing = False
self.components.btnDraw.enabled = True
self.components.btnCancel.enabled = False
def on_btnDraw_mouseClick(self, event):
self.drawing = True
event.target.enabled = False
self.components.btnCancel.enabled = True
self.doHopalong()
def on_btnCancel_mouseClick(self, event):
self.drawing = False
def on_editClear_command(self, event):
self.components.bufOff.clear()
def on_close(self, event):
self.drawing = False
event.skip()
if __name__ == '__main__':
app = model.Application(Hopalong)
app.MainLoop()
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