Mercurial Mercurial > periplus / annotate
summary | shortlog | changelog | graph | tags | bookmarks | branches | files | changeset | file | latest | revisions | annotate | diff | comparison | raw | help
Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
toolkit/javascript/d3/src/core/random.js
author Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
Fri, 18 Apr 2014 14:31:58 +0200
changeset 51 79833eaa394a
parent 47 c0b4a8b5a012
permissions -rw-r--r--
set up second level for navigation
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
47
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
     1
 
d3.random = {
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
     2
 
  normal: function(mean, deviation) {
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
     3
 
    if (arguments.length < 2) deviation = 1;
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
     4
 
    if (arguments.length < 1) mean = 0;
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
     5
 
    return function() {
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
     6
 
      var x, y, r;
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
     7
 
      do {
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
     8
 
        x = Math.random() * 2 - 1;
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
     9
 
        y = Math.random() * 2 - 1;
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
    10
 
        r = x * x + y * y;
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
    11
 
      } while (!r || r > 1);
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
    12
 
      return mean + deviation * x * Math.sqrt(-2 * Math.log(r) / r);
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
    13
 
    };
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
    14
 
  }
c0b4a8b5a012 add toolkit.html + démonstrateurs
Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
parents:
diff changeset 
    15
 
};
periplus