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Temporal-Jittering-Layout/index.js
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| module.exports = { | |
| arrange: function ( data, parameters ) { | |
| var defaultParam = { | |
| maxExec: 2000, | |
| stackHeight: 240, | |
| symmetrical: false | |
| }; | |
| var param = Object.assign({}, defaultParam, parameters); | |
| function cellsEmpty( x, y, r ) { | |
| var empty = true; | |
| if ( param.symmetrical ) { | |
| y = centroidY( y, r ); | |
| } | |
| for ( var col = x; col < x + r; col++ ) { | |
| for (var row = y; row < y + r; row++ ) { | |
| if ( ! grid[ col ] ) { | |
| grid[ col ] = []; | |
| } | |
| if ( grid[ col ][ row ] ) { | |
| empty = false; | |
| break; | |
| } | |
| } | |
| if ( ! empty ) { | |
| break; | |
| } | |
| } | |
| return empty; | |
| } | |
| function centroidY( y, r ) { | |
| var shift = Math.ceil( y / 2 ); | |
| if ( y % 2 ) { | |
| return param.stackHeight / 2 + shift; | |
| } else { | |
| return param.stackHeight / 2 - shift + r; | |
| } | |
| } | |
| function occupyCells( x, y, r ) { | |
| for ( var i = x; i <= x + r; i++ ) { | |
| if ( ! minY[ i ] || minY[ i ] < y ) { | |
| minY[ i ] = y; | |
| } | |
| } | |
| if ( param.symmetrical ) { | |
| y = centroidY( y, r ); | |
| } | |
| for ( var col = x; col < x + r; col++ ) { | |
| for ( var row = y; row < y + r; row++ ) { | |
| if ( ! grid[ col ] ) { | |
| grid[ col ] = []; | |
| } | |
| grid[ col ][ row ] = true; | |
| } | |
| } | |
| } | |
| function findMinimalY( xMin, xMax, r ) { | |
| var y = param.stackHeight; | |
| var x = xMin; | |
| var count = 0; | |
| for( var i = xMin; i <= xMax; i++) { | |
| if ( ! minY[ i ] ) { | |
| if ( count >= r ) { | |
| y = 0; | |
| break; | |
| } else { | |
| count++; | |
| } | |
| } else if ( minY[ i ] < y ) { | |
| y = minY[ i ]; | |
| x = i; | |
| } | |
| } | |
| if ( y == param.stackHeight ) { | |
| y = 0; | |
| } | |
| return {x: x, y: y}; | |
| } | |
| function findOptimalPos( x, y, r, xMin, xMax, stack, item ) { | |
| if ( ! stack ) { | |
| stack = 0; | |
| } | |
| stack++; | |
| if ( cellsEmpty( x, y, r ) || stack >= param.maxExec) { | |
| occupyCells( x, y, r); | |
| if ( param.symmetrical ) { | |
| y = centroidY( y, r ); | |
| } | |
| return [ x, y ]; | |
| } | |
| if ( x < xMax ) { | |
| return findOptimalPos( x + 1, y, r, xMin, xMax, stack, item ); | |
| } else { | |
| return findOptimalPos( xMin, y + 1, r, xMin, xMax, stack, item ); | |
| } | |
| } | |
| var grid = []; | |
| var minY = []; | |
| for ( var i = 0; i < data.length; i++ ) { | |
| var x = Math.floor( data[ i ].xMin ); | |
| var xMax = Math.ceil( data[ i ].xMax ); | |
| var r = Math.ceil( data[ i ].r ); | |
| var minYpos = findMinimalY( x, xMax, r ); | |
| x = minYpos.x; | |
| var y = minYpos.y; | |
| if ( x ) { | |
| var position = findOptimalPos( x, y, r * 2, x, xMax, 0, data[i] ); | |
| data[ i ].x = position[ 0 ]; | |
| data[ i ].y = position[ 1 ]; | |
| } | |
| } | |
| return data; | |
| } | |
| } |