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Use a pathData cache to improve rendering performance

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Ophir LOJKINE 2018-11-29 15:52:52 +01:00
parent 13f2ebba63
commit d75371c958
1 changed files with 11 additions and 1 deletions
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12
client-data/tools/pencil/pencil.js
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@ -102,9 +102,19 @@
return Math.hypot(x2 - x1, y2 - y1);
}
var pathDataCache = {};
function getPathData(line) {
var pathData = pathDataCache[line.id];
if (!pathData) {
pathData = line.getPathData();
pathDataCache[line.id] = pathData;
}
return pathData;
}
var svg = Tools.svg;
function addPoint(line, x, y) {
var pts = line.getPathData(), //The points that are already in the line as a PathData
var pts = getPathData(line), //The points that are already in the line as a PathData
nbr = pts.length; //The number of points already in the line
switch (nbr) {
case 0: //The first point in the line