diff options
author | Karl Berry <karl@freefriends.org> | 2006-01-09 00:49:07 +0000 |
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committer | Karl Berry <karl@freefriends.org> | 2006-01-09 00:49:07 +0000 |
commit | 007f67a693e4d031fd3d792df8e4d5f43e2cb2e7 (patch) | |
tree | 90d17e00e572ecb1e24764b6f29c80e098b08d29 /Master/texmf-dist/doc/latex/metaplot/examples/cap1.cc | |
parent | 950209b26f70aa87ed07c54f82a95b6f03b7c3a0 (diff) |
doc/latex
git-svn-id: svn://tug.org/texlive/trunk@84 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/doc/latex/metaplot/examples/cap1.cc')
-rw-r--r-- | Master/texmf-dist/doc/latex/metaplot/examples/cap1.cc | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/Master/texmf-dist/doc/latex/metaplot/examples/cap1.cc b/Master/texmf-dist/doc/latex/metaplot/examples/cap1.cc new file mode 100644 index 00000000000..256a42c9835 --- /dev/null +++ b/Master/texmf-dist/doc/latex/metaplot/examples/cap1.cc @@ -0,0 +1,46 @@ +/* Simple capillary surface */ + +#include<sstream> +#include<iostream> +#include<cmath> + +using namespace std; + +string mpoint(double x, double y) { + ostringstream pointstring; + pointstring.setf(ios_base::fixed,ios_base::floatfield); + pointstring.precision(5); + pointstring << '(' << x << ',' << y << ')'; + return pointstring.str(); +} + +double arccosh(double x) { + return log(x + sqrt(x*x-1)); +} + +double capillary(double z, double h, double d) { + return arccosh(2.0*d/z) - arccosh(2.0*d/h) + + sqrt(4.0 - h*h/(d*d)) - sqrt(4.0 - z*z/(d*d)); +} + +const double pi = 3.1415926535897932384626433832795; + +int main() { + double theta = pi/4.0; + double d = 1.0; + double h = sqrt(2.0 * d*d * (1.0 - sin(theta))); + double y, z; + + cout << "picture capillary; capillary := nullpicture;\n"; + cout << "addto capillary contour " << mpoint(0.0,h); + + for(int i=99;i>2;i--) { + z = (i/100.0) * h; + y = capillary(z,h,d); + cout << " .. " << mpoint(y,z); + } + + cout << " -- " << mpoint(y,-0.5); + cout << " -- " << mpoint(0.0,-0.5); + cout << " -- cycle;\n"; +} |