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package.lib.segment-selector.js Maven / Gradle / Ivy
// (c) Copyright 2016, Sean Connelly (@voidqk), http://syntheti.cc
// MIT License
// Project Home: https://github.com/voidqk/polybooljs
//
// filter a list of segments based on boolean operations
//
function select(segments, selection, buildLog){
var result = [];
segments.forEach(function(seg){
var index =
(seg.myFill.above ? 8 : 0) +
(seg.myFill.below ? 4 : 0) +
((seg.otherFill && seg.otherFill.above) ? 2 : 0) +
((seg.otherFill && seg.otherFill.below) ? 1 : 0);
if (selection[index] !== 0){
// copy the segment to the results, while also calculating the fill status
result.push({
id: buildLog ? buildLog.segmentId() : -1,
start: seg.start,
end: seg.end,
myFill: {
above: selection[index] === 1, // 1 if filled above
below: selection[index] === 2 // 2 if filled below
},
otherFill: null
});
}
});
if (buildLog)
buildLog.selected(result);
return result;
}
var SegmentSelector = {
union: function(segments, buildLog){ // primary | secondary
// above1 below1 above2 below2 Keep? Value
// 0 0 0 0 => no 0
// 0 0 0 1 => yes filled below 2
// 0 0 1 0 => yes filled above 1
// 0 0 1 1 => no 0
// 0 1 0 0 => yes filled below 2
// 0 1 0 1 => yes filled below 2
// 0 1 1 0 => no 0
// 0 1 1 1 => no 0
// 1 0 0 0 => yes filled above 1
// 1 0 0 1 => no 0
// 1 0 1 0 => yes filled above 1
// 1 0 1 1 => no 0
// 1 1 0 0 => no 0
// 1 1 0 1 => no 0
// 1 1 1 0 => no 0
// 1 1 1 1 => no 0
return select(segments, [
0, 2, 1, 0,
2, 2, 0, 0,
1, 0, 1, 0,
0, 0, 0, 0
], buildLog);
},
intersect: function(segments, buildLog){ // primary & secondary
// above1 below1 above2 below2 Keep? Value
// 0 0 0 0 => no 0
// 0 0 0 1 => no 0
// 0 0 1 0 => no 0
// 0 0 1 1 => no 0
// 0 1 0 0 => no 0
// 0 1 0 1 => yes filled below 2
// 0 1 1 0 => no 0
// 0 1 1 1 => yes filled below 2
// 1 0 0 0 => no 0
// 1 0 0 1 => no 0
// 1 0 1 0 => yes filled above 1
// 1 0 1 1 => yes filled above 1
// 1 1 0 0 => no 0
// 1 1 0 1 => yes filled below 2
// 1 1 1 0 => yes filled above 1
// 1 1 1 1 => no 0
return select(segments, [
0, 0, 0, 0,
0, 2, 0, 2,
0, 0, 1, 1,
0, 2, 1, 0
], buildLog);
},
difference: function(segments, buildLog){ // primary - secondary
// above1 below1 above2 below2 Keep? Value
// 0 0 0 0 => no 0
// 0 0 0 1 => no 0
// 0 0 1 0 => no 0
// 0 0 1 1 => no 0
// 0 1 0 0 => yes filled below 2
// 0 1 0 1 => no 0
// 0 1 1 0 => yes filled below 2
// 0 1 1 1 => no 0
// 1 0 0 0 => yes filled above 1
// 1 0 0 1 => yes filled above 1
// 1 0 1 0 => no 0
// 1 0 1 1 => no 0
// 1 1 0 0 => no 0
// 1 1 0 1 => yes filled above 1
// 1 1 1 0 => yes filled below 2
// 1 1 1 1 => no 0
return select(segments, [
0, 0, 0, 0,
2, 0, 2, 0,
1, 1, 0, 0,
0, 1, 2, 0
], buildLog);
},
differenceRev: function(segments, buildLog){ // secondary - primary
// above1 below1 above2 below2 Keep? Value
// 0 0 0 0 => no 0
// 0 0 0 1 => yes filled below 2
// 0 0 1 0 => yes filled above 1
// 0 0 1 1 => no 0
// 0 1 0 0 => no 0
// 0 1 0 1 => no 0
// 0 1 1 0 => yes filled above 1
// 0 1 1 1 => yes filled above 1
// 1 0 0 0 => no 0
// 1 0 0 1 => yes filled below 2
// 1 0 1 0 => no 0
// 1 0 1 1 => yes filled below 2
// 1 1 0 0 => no 0
// 1 1 0 1 => no 0
// 1 1 1 0 => no 0
// 1 1 1 1 => no 0
return select(segments, [
0, 2, 1, 0,
0, 0, 1, 1,
0, 2, 0, 2,
0, 0, 0, 0
], buildLog);
},
xor: function(segments, buildLog){ // primary ^ secondary
// above1 below1 above2 below2 Keep? Value
// 0 0 0 0 => no 0
// 0 0 0 1 => yes filled below 2
// 0 0 1 0 => yes filled above 1
// 0 0 1 1 => no 0
// 0 1 0 0 => yes filled below 2
// 0 1 0 1 => no 0
// 0 1 1 0 => no 0
// 0 1 1 1 => yes filled above 1
// 1 0 0 0 => yes filled above 1
// 1 0 0 1 => no 0
// 1 0 1 0 => no 0
// 1 0 1 1 => yes filled below 2
// 1 1 0 0 => no 0
// 1 1 0 1 => yes filled above 1
// 1 1 1 0 => yes filled below 2
// 1 1 1 1 => no 0
return select(segments, [
0, 2, 1, 0,
2, 0, 0, 1,
1, 0, 0, 2,
0, 1, 2, 0
], buildLog);
}
};
module.exports = SegmentSelector;
