The source code below demonstrates how strange things
can get when you use a 'curve' object with a very wide
radius and a lot of changes taking place. As is
common, the exact performance of this program can vary
significantly with your hardware configuration. Have
fun tinkering with parameters.
Joel
............................................
from visual import *
from time import *
# Joel Kahn
# 2004
# jj...@ya...
# This program is free software;
# you can redistribute it and/or
# modify it under the applicable
# terms of the GNU General Public
# License as published by the Free
# Software Foundation; either
# version 2 of the License, or (at
# your option) any later version.
# This program is distributed in
# the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even
# the implied warranty of
# MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
autocenter = 1
scene = display()
scene.width = 1024
scene.height = 738
scene.x = 0
scene.y = 0
fr1 = frame ()
cu1 = curve (frame = fr1, radius = 2000.0)
cu1.append (pos = (0.0, 0.0, 0.0))
cu1.append (pos = (0.0, 0.0, 0.0))
cu1.append (pos = (0.0, 0.0, 0.0))
cu1.append (pos = (0.0, 0.0, 0.0))
cu1.append (pos = (0.0, 0.0, 0.0))
cu1.append (pos = (0.0, 0.0, 0.0))
cu1.append (pos = (0.0, 0.0, 0.0))
mm0 = 0.0
mm1 = 0.0
mm2 = 0.0
mm3 = 0.0
mm4 = 0.0
mm5 = 0.0
mm6 = 0.0
step0 = 0.00031
step1 = 0.00029
step2 = 0.00023
step3 = 0.00019
step4 = 0.00017
step5 = 0.00013
step6 = 0.00011
while 2.0 > 1.0:
mm0 = mm0 + step0 - 1.0 / time ()
cu1.x[0] = cu1.x[0] + cos (mm0) - 1.0 / time ()
cu1.y[0] = cu1.y[0] + sin (mm0) - 1.0 / time ()
cu1.red[0] = abs (cos (mm0)) - 1.0 / time ()
cu1.green[0] = abs (cos (mm1)) - 1.0 / time ()
cu1.blue[0] = abs (cos (mm2)) - 1.0 / time ()
mm1 = mm1 + step1 - 1.0 / time ()
cu1.y[1] = cu1.y[1] + cos (mm1) - 1.0 / time ()
cu1.z[1] = cu1.z[1] + sin (mm1) - 1.0 / time ()
cu1.red[1] = abs (sin (mm1)) - 1.0 / time ()
cu1.green[1] = abs (sin (mm2)) - 1.0 / time ()
cu1.blue[1] = abs (sin (mm3)) - 1.0 / time ()
mm2 = mm2 + step2 - 1.0 / time ()
cu1.x[2] = cu1.x[2] + cos (mm2) - 1.0 / time ()
cu1.z[2] = cu1.z[2] + sin (mm2) - 1.0 / time ()
cu1.red[2] = abs (cos (mm2)) - 1.0 / time ()
cu1.green[2] = abs (cos (mm3)) - 1.0 / time ()
cu1.blue[2] = abs (cos (mm4)) - 1.0 / time ()
mm3 = mm3 + step3 - 1.0 / time ()
cu1.x[3] = cu1.x[3] + cos (mm3) - 1.0 / time ()
cu1.y[3] = cu1.y[3] + sin (mm3) - 1.0 / time ()
cu1.red[3] = abs (sin (mm3)) - 1.0 / time ()
cu1.green[3] = abs (sin (mm4)) - 1.0 / time ()
cu1.blue[3] = abs (sin (mm5)) - 1.0 / time ()
mm4 = mm4 + step4 - 1.0 / time ()
cu1.y[4] = cu1.y[4] + cos (mm4) - 1.0 / time ()
cu1.z[4] = cu1.z[4] + sin (mm4) - 1.0 / time ()
cu1.red[4] = abs (cos (mm4)) - 1.0 / time ()
cu1.green[4] = abs (cos (mm5)) - 1.0 / time ()
cu1.blue[4] = abs (cos (mm6)) - 1.0 / time ()
mm5 = mm5 + step5 - 1.0 / time ()
cu1.x[5] = cu1.x[5] + cos (mm5) - 1.0 / time ()
cu1.z[5] = cu1.z[5] + sin (mm5) - 1.0 / time ()
cu1.red[5] = abs (sin (mm5)) - 1.0 / time ()
cu1.green[5] = abs (sin (mm6)) - 1.0 / time ()
cu1.blue[5] = abs (sin (mm0)) - 1.0 / time ()
mm6 = mm6 + step6 - 1.0 / time ()
cu1.x[6] = cu1.x[6] + cos (mm6) - 1.0 / time ()
cu1.y[6] = cu1.y[6] + sin (mm6) - 1.0 / time ()
cu1.red[6] = abs (cos (mm6)) - 1.0 / time ()
cu1.green[6] = abs (cos (mm0)) - 1.0 / time ()
cu1.blue[6] = abs (cos (mm1)) - 1.0 / time ()
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