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--- graphicsimagejkeyevortex [2016/01/01 22:37]
+++ graphicsimagejkeyevortex [2020/02/28 10:46] (current)
@@ Line 1: / Line 1: @@
+{{:en:kahn_joel_eye_in_vortex.png?200}}
+Eye in Vortex by Joel Kahn (June 2010)\\
+Modified 2013-02 for version 0.9.9.45 and later
+<code>
+# Contributed by Joel Kahn
+cls
+clg
+l=700
+w=500
+graphsize l,w
+dim f(8)
+f[0]=0
+f[1]=0
+f[2]=17
+f[3]=0
+f[4]=17
+f[5]=1
+f[6]=0
+f[7]=1
+m1=1
+m2=2
+x1=l/2
+y1=w/2
+x2=x1+1
+y2=y1+1
+qq1=0.99999
+q1=1.34
+qq2=0.99998
+q2=1.33
+vv1=0.011
+v1=0.0
+vv2=0.012
+v2=-0.1
+s1=1.411
+s2=1.412
+c1=0.0
+c2=2.0^24.0
+for d=1 to 25000
+   m1=m1+1/m1
+   x1=x1+s1*cos(m1)
+   y1=y1+sin(m1)
+   c1=c1+6.01
+   q1=q1*qq1
+   v1=v1+vv1
+   color rgb(c1\256\256%256, c1\256%256, c1%256)
+   stamp x1,y1,q1,v1,f
+   m2=m2+1/m2
+   x2=x2+s2*cos(m2)
+   y2=y2+sin(m2)
+   c2=c2-6.02
+   q2=q2*qq2
+   v2=v2+vv2
+   color rgb(c2\256\256%256, c2\256%256, c2%256)
+   stamp x2,y2,q2,v2,f
+next d
+</code>

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