backups/Fantasy-Map-Generator
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slightly optimize onZoom

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Azgaar 2022-05-12 23:54:19 +03:00
parent decfbc1337
commit aab27ca673
4 changed files with 25 additions and 12 deletions
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21
main.js
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@ -131,20 +131,21 @@ let scale = 1;
let viewX = 0;
let viewY = 0;
const zoomThrottled = throttle(doWorkOnZoom, 100);
function zoomed() {
function onZoom() {
const {k, x, y} = d3.event.transform;
const isScaleChanged = Boolean(scale - k);
const isPositionChanged = Boolean(viewX - x || viewY - y);
if (!isScaleChanged && !isPositionChanged) return;
scale = k;
viewX = x;
viewY = y;
zoomThrottled(isScaleChanged, isPositionChanged);
handleZoom(isScaleChanged, isPositionChanged);
}
const zoom = d3.zoom().scaleExtent([1, 20]).on("zoom", zoomed);
const onZoomDebouced = debounce(onZoom, 50);
const zoom = d3.zoom().scaleExtent([1, 20]).on("zoom", onZoomDebouced);
// default options
let options = {
@ -449,7 +450,17 @@ function applyDefaultBiomesSystem() {
return {i: d3.range(0, name.length), name, color, biomesMartix, habitability, iconsDensity, icons, cost};
}
function doWorkOnZoom(isScaleChanged, isPositionChanged) {
let optimizedQuality = false;
function handleZoom(isScaleChanged, isPositionChanged) {
if (!optimizedQuality) {
setRendering("optimizeSpeed");
setTimeout(() => {
optimizedQuality = false;
setRendering(shapeRendering.value);
}, 1000);
}
viewbox.attr("transform", `translate(${viewX} ${viewY}) scale(${scale})`);
if (isPositionChanged) drawCoordinates();