skip purge block when no prior points output
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@ -625,7 +625,7 @@ FDM.prepare = function(widgets, settings, update) {
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// if a declared extruder isn't used in a layer, use selected
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// if a declared extruder isn't used in a layer, use selected
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// extruder to fill the relevant purge blocks for later support
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// extruder to fill the relevant purge blocks for later support
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track.slice().forEach(ext => {
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if (lastOut) track.slice().forEach(ext => {
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printPoint = purge(ext.extruder, track, layerout, printPoint, lastOut.z, lastExt, lastOffset);
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printPoint = purge(ext.extruder, track, layerout, printPoint, lastOut.z, lastExt, lastOffset);
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});
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});
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