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Resample transformations (#782)

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* Rescale style option for submaps.

* namespace for submap ui.

* Keep visual change for towns

* rotation and shift for resample

* Shift first - rotate later

* submap mirror transformation, applicative style

Co-authored-by: Mészáros Gergely <monk@geotronic.hu>
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Gergely Mészáros, Ph.D 2022-04-20 21:43:13 +02:00 • committed by GitHub
parent 53dc9a452d
commit e9b4a7b03a
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3 changed files with 87 additions and 18 deletions
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36
modules/ui/submap.js
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@ -25,6 +25,12 @@ window.UISubmap = (function () {
function openRemapOptions() {
resetZoom(0);
document.getElementById("submapRotationAngle").value = 0;
document.getElementById("submapRotationAngleOutput").value = "0°";
document.getElementById("submapShiftX").value = 0;
document.getElementById("submapShiftY").value = 0;
document.getElementById("submapMirrorH").checked = false;
document.getElementById("submapMirrorV").checked = false;
$("#remapOptionsDialog").dialog({
title: "Resampler options",
resizable: false,
@ -47,10 +53,36 @@ window.UISubmap = (function () {
const resampleCurrentMap = debounce(function () {
// Resample the whole map to different cell resolution or shape
const cellNumId = Number(document.getElementById("submapPointsInput").value);
const angle = Number(document.getElementById("submapRotationAngle").value) / 180 * Math.PI;
const shiftX = Number(document.getElementById("submapShiftX").value);
const shiftY = Number(document.getElementById("submapShiftY").value);
const mirrorH = document.getElementById("submapMirrorH").checked;
const mirrorV = document.getElementById("submapMirrorV").checked;
if (!cellsDensityConstants[cellNumId]) {
console.error("Unknown cell number!");
return;
}
const [cx, cy] = [graphWidth / 2, graphHeight / 2];
const rot = alfa => (x, y) => [
(x - cx) * Math.cos(alfa) - (y - cy) * Math.sin(alfa) + cx,
(y - cy) * Math.cos(alfa) + (x - cx) * Math.sin(alfa) + cy
];
const shift = (dx, dy) => (x, y) => [x + dx, y + dy];
const flipH = (x, y) => [-x + 2 * cx, y];
const flipV = (x, y) => [x, -y + 2 * cy];
const app = (f, g) => (x, y) => f(...g(x, y));
const id = (x, y) => [x, y];
let projection = id, inverse = id;
if (angle) [projection, inverse] = [rot(angle), rot(-angle)];
if (shiftX || shiftY) {
projection = app(shift(shiftX, shiftY), projection);
inverse = app(inverse, shift(-shiftX, -shiftY));
}
if (mirrorH) [projection, inverse] = [app(flipH, projection), app(inverse, flipH)];
if (mirrorV) [projection, inverse] = [app(flipV, projection), app(inverse, flipV)];
changeCellsDensity(cellNumId);
WARN && console.warn("Resampling current map");
startResample({
@ -61,8 +93,8 @@ window.UISubmap = (function () {
promoteTowns: false,
smoothHeightMap: false,
rescaleStyles: false,
projection: (x, y) => [x, y],
inverse: (x, y) => [x, y]
projection,
inverse,
});
}, 1000);