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@@ -1,6 +1,6 @@
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======= Pysketcher =======
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-Tool for defining sketches of physics problems in terms of Python code.
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+Tool for creating sketches of physics problems in terms of Python code.
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===== Purpose =====
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@@ -8,11 +8,13 @@ Pysketcher can typically be used to draw figures like
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FIGURE: [doc/src/tut/fig-tut/wheel_on_inclined_plane, width=600 frac=0.6]
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-Such figures can easily be *interactively* made using a lot of drawing programs.
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-A Pysketcher figure, however, is defined in terms of computer code. This gives
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-a great advantage: geometric features can be parameterized in term
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-of variables. Geometric variations are then trivially generated, and
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-complicated figures can be built as a hierarchy of simpler elements.
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+Such figures can easily be *interactively* made using a lot of drawing
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+programs. A Pysketcher figure, however, is defined in terms of
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+computer code. This gives a great advantage: geometric features can be
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+parameterized in term of variables. Geometric variations are then
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+trivially generated, and complicated figures can be built as a
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+hierarchy of simpler elements. The figure can easily be made to move
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+according to, e.g., a solution of a differential equation.
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Here is a very simple figure that illustrates how geometric features are
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parameterized by variables (H, R, L, etc.):
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Hans Petter Langtangen