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15 lines
441 B
Plaintext
15 lines
441 B
Plaintext
bsplinecurve b1 3 5 0 4 1 1 2 1 3 1 4 4 0 0 0 1 1 0.5 0 1 2 1 0 1 2 2 0 1 3 1.5 0 1 4 1.5 0 1 5 2 0 1
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cvalue b1 2.0 x y z dx dy dz
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set delta 0.01
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point p1 x y z
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set dyvalue [dval dy]
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set dzvalue [dval dz]
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repeat 100 {
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cmovetangent b1 2.0 x y z dx $dyvalue $dzvalue 1
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set dyvalue [expr $dyvalue + $delta ]
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set dzvalue [expr $dzvalue + $delta ]
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repaint }
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renamevar b1 result
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set length 7.238501337474319
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