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author | Nicolas Bornand <nicolas74@gmail.com> | 2014-05-10 18:32:25 +0200 |
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committer | Nicolas Bornand <nicolas74@gmail.com> | 2014-05-10 18:32:25 +0200 |
commit | 8ccdc51b4cd62f2930e3495fc6c0065245cc7646 (patch) | |
tree | d6a74f2c2df352c7f73e57c597e27bef1e6d9375 /app/js/services.js | |
parent | 87042230b282b5123a1b7489f244952992a4109d (diff) | |
download | playGraph-8ccdc51b4cd62f2930e3495fc6c0065245cc7646.tar.gz playGraph-8ccdc51b4cd62f2930e3495fc6c0065245cc7646.tar.bz2 playGraph-8ccdc51b4cd62f2930e3495fc6c0065245cc7646.zip |
add path service
Diffstat (limited to 'app/js/services.js')
-rw-r--r-- | app/js/services.js | 40 |
1 files changed, 35 insertions, 5 deletions
diff --git a/app/js/services.js b/app/js/services.js index 1b203f5..1788915 100644 --- a/app/js/services.js +++ b/app/js/services.js @@ -9,13 +9,43 @@ app.service('pathService', function() { var dy = point1.y - point2.y; return Math.sqrt(dx * dx + dy * dy); }, - computePlaylist: function(songList, constrainList) { + computePlaylist: function(songList, constrainList, duration) { + //compute distances from the constrain path + var maxDistOverall = Number.MIN_VALUE; angular.forEach(songList, function(song){ - var min = Number.MAX_VALUE; - angular.forEach(constrainList, function(point){ - var d = dist(song, point); - }); + song.minDist = Number.MAX_VALUE; + for(var i=0; i<constrainList.length;i++){ + var point = constrainList[i]; + var d = self.dist(song, point); + if(d < song.minDist){ + song.minDist = d; + song.closest = point; + song.closestIndex = i; + } + } + if(song.minDist > maxDistOverall){ + maxDistOverall = song.minDist; + } }); + //select the songs + var selection = []; + while(duration > 0 && songList.length > 0){ + //randomly select one song + var index = Math.floor(Math.random()*songList.length); + var song = songList[index]; + var ratio = song.minDist/maxDistOverall; + console.log(ratio); + //favor the ones closer to the path + var weight = 1 - ratio*ratio; + if(Math.random() < weight){ + songList.splice(index, 1); + selection.push(song); + } + duration = 0; + } + selection.sort(function(item){ return item.closestIndex;}); + console.log(selection); + return selection; } }; return self; |