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index_update_algorithm.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Openlayer Grid</title>
<!-- Openlayers -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@latest/ol.css" />
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/ol@latest/dist/ol.js"></script>
<script
src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL,Object.assign"></script>
<script src="https://unpkg.com/@turf/turf"></script>
<!-- ol-ext -->
<link rel="stylesheet" href="./dist/ol-ext.css" />
<script type="text/javascript" src="./dist/ol-ext.js"></script>
<!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer -->
<script src="https://unpkg.com/elm-pep"></script>
</head>
<body style="width: 100%;height: 100%;">
<!-- Map div -->
<div id="map" style="width:100%; height:100vh; margin: 0px; padding: 0px;"></div>
<div className="rectangle" style="display: grid; position: absolute; top: 80px; left: 20px;">
<button onClick="handle()" id="handle">Activate Draw</button>
<button onClick="handleButtonValid()" style="margin-top: 5px; "> Valide</button>
<button onClick="handleButtonValidtest()" style="margin-top: 5px; "> GeoJsonTest</button>
</div>
<div className="rectangle" style="display: grid; position: absolute; top: 30px; left: 500px;">
<div>
<span>Grid Size</span>
<input type="number" style="text-align: center; margin-right: 5px;" id="myInput" value="10"
onchange="onInputChange(this)" />
<span>m</span>
</div>
<div style="margin-top: 2px;">
<span style="margin-right: 5px;">Grid mode</span>
<select id="select" value={selectedOption} onchange='handleSelectChange(this)'>
<option value="up_right">Top->Right align</option>
<option value="up_left">Top->Left align</option>
<option selected value="down_left">Bottom->Left align</option>
<option value="down_right">Bottom->Right align</option>
</select>
</div>
</div>
<script type="text/javascript">
var drawActive = false;
var drawFeature = null;
var newDrawFeature = null;
var rectangle = null;
var rectCoordinates = null;
var rectgridLayer = null;
var extent = null;
var interaction = null;
var value = 10;
var draw = null;
var startangle = 0;
var startRadius = 10;
var d = [0, 0];
// var map_grid_anchor = 'down_left';
// var map_grid_anchor = 'down_right';
var map_grid_anchor = 'down_left';
const map = new ol.Map({
target: 'map',
layers: [
new ol.layer.Tile({
source: new ol.source.OSM(),
}),
],
view: new ol.View({
center: [726376.0586457778, 5865060.915527701],
// center: [261720, 5951081],
zoom: 18,
}),
});
const source = new ol.source.Vector({ wrapX: false });
const vector = new ol.layer.Vector({
source,
style: new ol.style.Style({
fill: new ol.style.Fill({
color: 'rgba(255, 255, 255, 0.2)',
}),
stroke: new ol.style.Stroke({
color: '#ffcc33',
width: 2,
}),
}),
name: 'RectLayer'
});
map.addLayer(vector);
function buttonTextChange(flag = false) {
drawActive = !drawActive;
if (drawActive) {
document.getElementById('handle').textContent = "Deactivat Draw";
}
else {
document.getElementById('handle').textContent = "Activat Draw";
map.removeInteraction(draw);
draw = null;
}
}
function handle() {
// let draw;
buttonTextChange(false);
if (!drawActive) return;
if (rectgridLayer) {
map.removeLayer(rectgridLayer);
rectgridLayer = null;
vector.getSource().removeFeature(drawFeature);
drawFeature = null;
}
if (interaction) {
map.removeInteraction(interaction);
interaction = null;
}
draw = new ol.interaction.Draw({
source: source,
type: 'Circle',
geometryFunction: ol.interaction.Draw.createBox(),
});
map.addInteraction(draw);
draw.on('drawend', (event) => {
const feature = event.feature;
const geometry = feature.getGeometry();
const extent = geometry.getExtent();
const width = extent[2] - extent[0];
const height = extent[3] - extent[1];
drawFeature = feature;
if (width < 300 && height < 300) {
drawFeature = feature;
buttonTextChange(true);
} else {
alert('Rectangle must be less than 300x300m');
vector.getSource().removeFeature(feature);
return;
}
interaction = new ol.interaction.Transform({
enableRotatedTransform: false,
addCondition: ol.events.condition.shiftKeyOnly,
hitTolerance: 2,
translateFeature: false,
scale: true,
rotate: true,
// keepAspectRatio: undefined,
translate: true,
keepRectangle: true,
stretch: true,
pointRadius: function (f) {
var radius = f.get('radius') || 10;
return [radius, radius];
}
});
map.addInteraction(interaction);
if (!interaction instanceof ol.interaction.Transform) return;
interaction.set('translate', interaction.get('translate'));
interaction.on(['rotatestart', 'translatestart', 'scalestart'], function (e) {
startangle = e.feature.get('angle') || 0;
startRadius = e.feature.get('radius') || 10;
d = [0, 0];
});
interaction.on('rotating', function (e) {
e.feature.set('angle', startangle - e.angle);
});
interaction.on('translating', function (e) {
d[0] += e.delta[0];
d[1] += e.delta[1];
});
interaction.on('scaling', function (e) {
if (e.features.getLength() === 1) {
var feature = e.features.item(0);
feature.set('radius', startRadius * Math.abs(e.scale[0]));
}
});
interaction.on(['rotateend', 'translateend', 'scaleend'], function (e) {
console.log(e.features.getArray()[0]);
drawFeature = e.features.getArray()[0];
});
// Refresh
interaction.set('translate', interaction.get('translate'));
});
};
function getFeaturefromGeoJSON(map_grid_geo_json) {
var format = new ol.format.GeoJSON();
var feature = format.readFeature(map_grid_geo_json, {
dataProjection: 'EPSG:4326',
featureProjection: 'EPSG:3857',
});
const rectangleCoordinates = feature.getGeometry().getCoordinates()[0];
const polygon = new ol.geom.Polygon([[
rectangleCoordinates[1],
rectangleCoordinates[2],
rectangleCoordinates[3],
rectangleCoordinates[0],
rectangleCoordinates[1]
]]);
return new ol.Feature({
geometry: polygon,
});
}
function handleButtonValidtest() {
var map_grid_geo_json = '{"type":"Feature","geometry":{"type":"Polygon","coordinates":[[[6.525147155,46.52609521599999],[6.524717199,46.52589173700002],[6.525159396,46.525446587000005],[6.525589356000001,46.525650067000015],[6.525147155,46.52609521599999]]]},"properties":null}';
drawFeature = getFeaturefromGeoJSON(map_grid_geo_json);
if (drawFeature) {
const layers = map.getLayers();
const gridStyle = new ol.style.Style({
image: new ol.style.Circle({
fill: new ol.style.Fill({
color: 'red',
}),
stroke: new ol.style.Stroke({
color: 'black',
width: 2,
}),
radius: 8,
}),
stroke: new ol.style.Stroke({
color: 'blue',
width: 2,
}),
text: new ol.style.Text({
fill: new ol.style.Fill({
color: 'rgba(255, 0, 0, 1)'
}),
font: '12px sans-serif',
textBaseline: 'bottom',
text: 'label'
})
});
const gridSource = new ol.source.Vector();
const gridLayer = new ol.layer.Vector({
source: gridSource,
style: function (feature) {
const fill = new ol.style.Fill({
color: 'rgba(255, 0, 0, 0.2)'
});
const stroke = new ol.style.Stroke({
color: 'blue',
width: 2
});
const text = new ol.style.Text({
fill: new ol.style.Fill({
color: 'rgba(255, 0, 0, 1)'
}),
font: '12px sans-serif',
textBaseline: 'center',
text: feature.get('text')
});
return new ol.style.Style({
fill: fill,
stroke: stroke,
text: text,
image: new ol.style.Circle({
radius: 6,
fill: new ol.style.Fill({
color: 'red'
}),
stroke: new ol.style.Stroke({
color: 'black',
width: 2
})
})
});
}
});
map.addLayer(gridLayer);
rectgridLayer = (gridLayer);
getNewRectangleFromPolygon(drawFeature.getGeometry().getCoordinates()[0], gridSource);
}
};
function isValidPoint(pt1, pt2, pt3) {
var minX = pt1[0];
var maxX = pt2[0];
if (pt1[0] >= pt2[0]) {
minX = pt2[0];
maxX = pt1[0];
}
if (pt3[0] > minX && pt3[0] < maxX) return false;
return true;
}
function getBaseLinePointsArray(array, source) {
var newArray = [];
if (array.length == 2) newArray = [array[0], array[0], array[1]];
var Vx = array[1][0] - array[0][0];
var Vy = array[1][1] - array[0][1];
if (array.length == 3) {
var Vx1 = array[2][0] - array[0][0];
var Vy1 = array[2][1] - array[0][1];
if (Vx / Vy == Vx1 / Vy1) {
newArray = [array[0], array[0], array[2]];
} else {
newArray = [array[0], array[2], array[1]];
}
} else if (array.length == 4) {
console.log(array)
var Vx1 = array[2][0] - array[0][0];
var Vy1 = array[2][1] - array[0][1];
var Vx2 = array[3][0] - array[0][0];
var Vy2 = array[3][1] - array[0][1];
if (Vx / Vy == Vx1 / Vy1 && Vx / Vy == Vx2 / Vy2) {
newArray = [array[0], array[2], array[1]];
} else if (Vx / Vy == Vx1 / Vy1) {
newArray = [array[0], array[3], array[2]];
} else if (Vx / Vy == Vx2 / Vy2) {
newArray = [array[0], array[2], array[3]];
} else {
console.log("other case");
newArray = [array[0], array[0], array[1]];
}
}
// newArray = [array[0], array[0], array[1]];
if (newArray[0] != newArray[1]){
var length = getLength(newArray[0], newArray[1]);
length = (parseInt(length / value) + 1 ) * value - length;
const Ax = newArray[1][0] - newArray[2][0];
const Ay = newArray[1][1] - newArray[2][1];
const ta = length * 1.0 / Math.sqrt(Ax * Ax + Ay * Ay);
return newArray;
}
return newArray;
}
function getNewCoords(baseLinePointsArray, pt1, pt2, source) {
var pointToLineDistance1 = getPointToLineDistance(baseLinePointsArray[1], baseLinePointsArray[2], pt1);
var pointToLineDistance2 = getPointToLineDistance(baseLinePointsArray[1], baseLinePointsArray[2], pt2);
var tempPoint = [0, 0];
if (pointToLineDistance1 >= pointToLineDistance2) {
tempPoint = pt1;
} else {
tempPoint = pt2;
}
var points = getAnotherPoints(baseLinePointsArray[1], baseLinePointsArray[2], tempPoint);
return [baseLinePointsArray[1], baseLinePointsArray[2], points[0], points[1], baseLinePointsArray[1]];
}
function getPointToLineDistance(pt1, pt2, pt0) {
var lineCoeff = getLineCoeff(pt1, pt2);
var a = lineCoeff[0];
var b = lineCoeff[1];
var distance = Math.abs(a * pt0[0] - pt0[1] + b) / Math.sqrt(a * a + 1);
return distance;
}
function getAnotherPoints(pt1, pt2, pt0) {
var lineCoeff = getLineCoeff(pt1, pt2);
var a = lineCoeff[0];
var b = lineCoeff[1];
var b1 = pt0[1] - a * pt0[0];
var b2 = pt1[1] + pt1[0] / a;
var x = (b2 - b1) / (a + 1 / a);
var y = - x / a + b2;
var b3 = pt2[1] + pt2[0] / a;
var x1 = (b3 - b1) / (a + 1 / a);
var y1 = - x1 / a + b3;
return [[x1, y1], [x, y]];
}
function getLineCoeff(pt1, pt2) {
let a = 1;
if (Math.abs(pt1[0] - pt2[0]) == 0) a = 1;
else a = (pt1[1] - pt2[1]) / (pt1[0] - pt2[0]);
let b = 0;
b = pt1[1] - a * pt1[0];
return [a, b]
}
function getClosestPointFromLine(pt1, pt2, pt0) {
console.log(pt1, pt2, pt0);
let lineCoeff = getLineCoeff(pt1, pt2);
console.log(lineCoeff);
var b1 = pt0[1] + pt0[0] / lineCoeff[0];
var x = (b1 - lineCoeff[1]) / (lineCoeff[0] + 1 / lineCoeff[0]);
var y = - x / lineCoeff[0] + b1;
return [x, y];
}
function getCoordsByLongerLine(coordinates) {
var pointArray = [];
if (map_grid_anchor == 'down_left') {
pointArray.push(coordinates[0]);
var length1 = getLength(coordinates[0], coordinates[1]);
var length2 = getLength(coordinates[0], coordinates[3]);
if (length1 >= length2) {
pointArray.push(coordinates[1]);
pointArray.push(coordinates[2]);
pointArray.push(coordinates[3]);
} else {
pointArray.push(coordinates[3]);
pointArray.push(coordinates[2]);
pointArray.push(coordinates[1]);
}
} else if (map_grid_anchor == 'down_right') {
pointArray.push(coordinates[1]);
var length1 = getLength(coordinates[1], coordinates[0]);
var length2 = getLength(coordinates[1], coordinates[2]);
if (length1 >= length2) {
pointArray.push(coordinates[0]);
pointArray.push(coordinates[3]);
pointArray.push(coordinates[2]);
} else {
pointArray.push(coordinates[2]);
pointArray.push(coordinates[3]);
pointArray.push(coordinates[0]);
}
} else if (map_grid_anchor == 'up_left') {
pointArray.push(coordinates[3]);
var length1 = getLength(coordinates[3], coordinates[0]);
var length2 = getLength(coordinates[3], coordinates[2]);
if (length1 >= length2) {
console.log("o")
pointArray.push(coordinates[0]);
pointArray.push(coordinates[1]);
pointArray.push(coordinates[2]);
} else {
pointArray.push(coordinates[2]);
pointArray.push(coordinates[1]);
pointArray.push(coordinates[0]);
}
} else if (map_grid_anchor == 'up_right') {
pointArray.push(coordinates[2]);
var length1 = getLength(coordinates[2], coordinates[3]);
var length2 = getLength(coordinates[2], coordinates[1]);
if (length1 >= length2) {
pointArray.push(coordinates[3]);
pointArray.push(coordinates[0]);
pointArray.push(coordinates[1]);
} else {
pointArray.push(coordinates[1]);
pointArray.push(coordinates[0]);
pointArray.push(coordinates[3]);
}
}
return pointArray;
}
function reorderArray(arr, index) {
if (index < 0 || index >= arr.length) {
// Handle invalid index
console.error('Invalid index');
return arr;
}
// Reorder the array
const reorderedArray = arr.slice(index).concat(arr.slice(0, index));
return reorderedArray;
}
function isCounterclockwiseDirection(coordinates) {
if (coordinates.length < 3) {
// Not enough points to determine direction
console.error('Insufficient number of coordinates.');
return false;
}
let sum = 0;
for (let i = 1; i < coordinates.length - 1; i++) {
const x1 = coordinates[i][0] - coordinates[i - 1][0];
const y1 = coordinates[i][1] - coordinates[i - 1][1];
const x2 = coordinates[i + 1][0] - coordinates[i][0];
const y2 = coordinates[i + 1][1] - coordinates[i][1];
// Calculate the cross product
const crossProduct = x1 * y2 - x2 * y1;
// Add the result to the sum
sum += crossProduct;
}
// Determine the overall direction based on the sign of the sum
if (sum > 0) {
return true;
} else if (sum < 0) {
return false;
}
return false;
}
function getNewPolygon(pointArray, source) {
console.log("pointArray", pointArray)
if ( !isCounterclockwiseDirection(pointArray)) {
console.log('counterclock')
pointArray = pointArray.reverse();
}
var startPointIndex = 0;
// var endPointIndex = 1;
var minLength = 9999999999999999.999999;
for (var i = 0; i < pointArray.length; i++) {
if (pointArray[i][0] <= minLength) {
minLength = pointArray[i][0];
startPointIndex = i;
}
}
console.log(startPointIndex);
var newPointArray = [];
for (var i = 0; i < pointArray.length; i++) {
newPointArray.push(pointArray[(startPointIndex + i)%4])
}
const Ax = newPointArray[0][0] - newPointArray[1][0];
const Ay = newPointArray[0][1] - newPointArray[1][1];
const Bx = newPointArray[0][0] - newPointArray[3][0];
const By = newPointArray[0][1] - newPointArray[3][1];
const ta = value * 1.0 / (Math.sqrt(Ax * Ax + Ay * Ay));
const tb = value * 1.0 / (Math.sqrt(Bx * Bx + By * By));
const newPoint1 = getNewPoint([Ax, Ay], [Bx, By], ta, tb, newPointArray[0]);
const newPoint2 = getNewPoint([-Ax, -Ay], [Bx, By], ta, tb, newPointArray[1]);
const newPoint3 = getNewPoint([-Ax, -Ay], [-Bx, -By], ta, tb, newPointArray[2]);
const newPoint4 = getNewPoint([Ax, Ay], [-Bx, -By], ta, tb, newPointArray[3]);
return [newPoint1, newPoint2, newPoint3, newPoint4, newPoint1];
}
function getNewPoint(VectorA, VectorB, ta, tb, pt) {
const newX1 = ta * VectorA[0] + pt[0];
const newY1 = ta * VectorA[1] + pt[1];
const newX2 = tb * VectorB[0] + pt[0];
const newY2 = tb * VectorB[1] + pt[1];
const X = newX1 + newX2 - pt[0];
const Y = newY1 + newY2 - pt[1];
return [X, Y];
}
function isRectangle(points) {
if (points.length !== 4) {
console.error('Invalid number of points. A rectangle needs exactly 4 points.');
return false;
}
// Calculate vectors
const vector1 = [points[1][0] - points[0][0], points[1][1] - points[0][1]];
const vector2 = [points[2][0] - points[1][0], points[2][1] - points[1][1]];
const vector3 = [points[3][0] - points[2][0], points[3][1] - points[2][1]];
const vector4 = [points[0][0] - points[3][0], points[0][1] - points[3][1]];
// Calculate dot products
const dotProduct1 = vector1[0] * vector2[0] + vector1[1] * vector2[1];
const dotProduct2 = vector2[0] * vector3[0] + vector2[1] * vector3[1];
const dotProduct3 = vector3[0] * vector4[0] + vector3[1] * vector4[1];
const dotProduct4 = vector4[0] * vector1[0] + vector4[1] * vector1[1];
// Check if dot products are zero (indicating perpendicular vectors)
if (dotProduct1 === 0 && dotProduct2 === 0 && dotProduct3 === 0 && dotProduct4 === 0) {
// Check if opposite sides are equal in length
const length1 = Math.sqrt(vector1[0] * vector1[0] + vector1[1] * vector1[1]);
const length2 = Math.sqrt(vector2[0] * vector2[0] + vector2[1] * vector2[1]);
const length3 = Math.sqrt(vector3[0] * vector3[0] + vector3[1] * vector3[1]);
const length4 = Math.sqrt(vector4[0] * vector4[0] + vector4[1] * vector4[1]);
if (length1 === length3 && length2 === length4) {
return true;
}
}
return false;
}
function getNewRectangleFromPolygon(coordinates, source) {
source.addFeature(drawFeature);
var newCoords = [];
newCoords = coordinates;
if (!isRectangle(coordinates.slice(0,4))) {
console.log('no rectange')
var alignCoords = getCoordsByLongerLine(coordinates);
var pointArray = [alignCoords[0], alignCoords[1]];
var nearestPoint = getClosestPointFromLine(alignCoords[0], alignCoords[1], alignCoords[2]);
if (isValidPoint(alignCoords[0], alignCoords[1], nearestPoint))
pointArray.push(nearestPoint);
nearestPoint = getClosestPointFromLine(alignCoords[0], alignCoords[1], alignCoords[3]);
if (isValidPoint(alignCoords[0], alignCoords[1], nearestPoint))
pointArray.push(nearestPoint);
console.log(pointArray);
var baseLinePointsArray = getBaseLinePointsArray(pointArray, source);
console.log("baseLinePointsArray", baseLinePointsArray);
newCoords = getNewCoords(baseLinePointsArray, alignCoords[2], alignCoords[3], source);
console.log("newCoords", newCoords);
}
var newPolygon = getNewPolygon(newCoords.slice(0, 4), source);
newFeature = new ol.Feature({
geometry: new ol.geom.Polygon(
[newPolygon]
),
});
// source.addFeature(newFeature);
const rectangleCoordinates = newFeature.getGeometry().getCoordinates()[0];
// const rectwidth = Math.abs(rectangleCoordinates[1][0] - rectangleCoordinates[0][0]);
// const rectheight = Math.abs(rectangleCoordinates[3][1] - rectangleCoordinates[0][1]);
const rectwidth = getLength(rectangleCoordinates[0], rectangleCoordinates[1]);
const rectheight = getLength(rectangleCoordinates[0], rectangleCoordinates[3]);
const numCols1 = (rectwidth / value);
const numRows1 = (rectheight / value);
const Ax = rectangleCoordinates[0][0] - rectangleCoordinates[1][0];
const Ay = rectangleCoordinates[0][1] - rectangleCoordinates[1][1];
const Bx = rectangleCoordinates[0][0] - rectangleCoordinates[3][0];
const By = rectangleCoordinates[0][1] - rectangleCoordinates[3][1];
const ta = value * 1.0 / (Math.sqrt(Ax * Ax + Ay * Ay));
const tb = value * 1.0 / (Math.sqrt(Bx * Bx + By * By));
for (let i = 1; i <= parseInt(numCols1); i++) {
if (map_grid_anchor == 'down_left') {
const lineFeature = new ol.Feature({
geometry: new ol.geom.LineString([
[rectangleCoordinates[0][0] - ta * Ax * i, rectangleCoordinates[0][1] - ta * Ay * i],
[rectangleCoordinates[3][0] - ta * Ax * i, rectangleCoordinates[3][1] - ta * Ay * i],
]),
});
const poly1 = turf.polygon(drawFeature.getGeometry().getCoordinates());
const line1 = turf.lineString(lineFeature.getGeometry().getCoordinates());
const intersection1 = turf.lineIntersect(poly1, line1);
let pointsTurf = [];
if (intersection1) {
turf.coordEach(intersection1, function (currentCoord, coordIndex, featureIndex, multiFeatureIndex, geometryIndex) {
pointsTurf.push(currentCoord);
});
if (pointsTurf.length < 2) continue;
source.addFeature(new ol.Feature({
geometry: new ol.geom.LineString([
pointsTurf[0],
pointsTurf[1],
]),
}));
}
}
else if (map_grid_anchor == 'down_right') {
const lineFeature = new ol.Feature({
geometry: new ol.geom.LineString([
[rectangleCoordinates[1][0] + ta * Ax * i, rectangleCoordinates[1][1] + ta * Ay * i],
[rectangleCoordinates[2][0] + ta * Ax * i, rectangleCoordinates[2][1] + ta * Ay * i],
]),
});
const poly1 = turf.polygon(drawFeature.getGeometry().getCoordinates());
const line1 = turf.lineString(lineFeature.getGeometry().getCoordinates());
const intersection1 = turf.lineIntersect(poly1, line1);
let pointsTurf = [];
if (intersection1) {
turf.coordEach(intersection1, function (currentCoord, coordIndex, featureIndex, multiFeatureIndex, geometryIndex) {
pointsTurf.push(currentCoord);
});
if (pointsTurf.length < 2) continue;
source.addFeature(new ol.Feature({
geometry: new ol.geom.LineString([
pointsTurf[0],
pointsTurf[1],
]),
}));
}
}
else if (map_grid_anchor == 'up_left') {
const lineFeature = new ol.Feature({
geometry: new ol.geom.LineString([
[rectangleCoordinates[0][0] - ta * Ax * i, rectangleCoordinates[0][1] - ta * Ay * i],
[rectangleCoordinates[3][0] - ta * Ax * i, rectangleCoordinates[3][1] - ta * Ay * i],
]),
});
const poly1 = turf.polygon(drawFeature.getGeometry().getCoordinates());
const line1 = turf.lineString(lineFeature.getGeometry().getCoordinates());
const intersection1 = turf.lineIntersect(poly1, line1);
let pointsTurf = [];
if (intersection1) {
turf.coordEach(intersection1, function (currentCoord, coordIndex, featureIndex, multiFeatureIndex, geometryIndex) {
pointsTurf.push(currentCoord);
});
if (pointsTurf.length < 2) continue;
source.addFeature(new ol.Feature({
geometry: new ol.geom.LineString([
pointsTurf[0],
pointsTurf[1],
]),
}));
}
}
else if (map_grid_anchor === 'up_right') {
const lineFeature = new ol.Feature({
geometry: new ol.geom.LineString([
[rectangleCoordinates[2][0] + ta * Ax * i, rectangleCoordinates[2][1] + ta * Ay * i],
[rectangleCoordinates[1][0] + ta * Ax * i, rectangleCoordinates[1][1] + ta * Ay * i],
]),
});
const poly1 = turf.polygon(drawFeature.getGeometry().getCoordinates());
const line1 = turf.lineString(lineFeature.getGeometry().getCoordinates());
const intersection1 = turf.lineIntersect(poly1, line1);
let pointsTurf = [];
if (intersection1) {
turf.coordEach(intersection1, function (currentCoord, coordIndex, featureIndex, multiFeatureIndex, geometryIndex) {
pointsTurf.push(currentCoord);
});
if (pointsTurf.length < 2) continue;
source.addFeature(new ol.Feature({
geometry: new ol.geom.LineString([
pointsTurf[0],
pointsTurf[1],
]),
}));
}
}
}
for (let j = 1; j <= parseInt(numRows1); j++) {
if (map_grid_anchor === 'down_left' || map_grid_anchor === 'down_right') {
const line = new ol.geom.LineString([
[rectangleCoordinates[0][0] - tb * Bx * j, rectangleCoordinates[0][1] - tb * By * j],
[rectangleCoordinates[1][0] - tb * Bx * j, rectangleCoordinates[1][1] - tb * By * j],
// Add as many points as necessary
]);
const lineFeature = new ol.Feature({
geometry: line,
});
// gridSource.addFeature(lineFeature);
const poly1 = turf.polygon(drawFeature.getGeometry().getCoordinates());
const line1 = turf.lineString(lineFeature.getGeometry().getCoordinates());
const intersection1 = turf.lineIntersect(poly1, line1);
let pointsTurf = [];
if (intersection1) {
turf.coordEach(intersection1, function (currentCoord, coordIndex, featureIndex, multiFeatureIndex, geometryIndex) {
pointsTurf.push(currentCoord);
});
if (pointsTurf.length < 2) continue;
source.addFeature(new ol.Feature({
geometry: new ol.geom.LineString([
pointsTurf[0],
pointsTurf[1],
]),
}));
} else {
console.log("No intersection found.");
}
}
else if (map_grid_anchor === 'up_left' || map_grid_anchor === 'up_right') {
const line = new ol.geom.LineString([
[rectangleCoordinates[2][0] + tb * Bx * j, rectangleCoordinates[2][1] + tb * By * j],
[rectangleCoordinates[3][0] + tb * Bx * j, rectangleCoordinates[3][1] + tb * By * j],
// Add as many points as necessary
]);
const lineFeature = new ol.Feature({
geometry: line,
});
// gridSource.addFeature(lineFeature);
const poly1 = turf.polygon(drawFeature.getGeometry().getCoordinates());
const line1 = turf.lineString(lineFeature.getGeometry().getCoordinates());
const intersection1 = turf.lineIntersect(poly1, line1);
let pointsTurf = [];
if (intersection1) {
turf.coordEach(intersection1, function (currentCoord, coordIndex, featureIndex, multiFeatureIndex, geometryIndex) {
pointsTurf.push(currentCoord);
});
if (pointsTurf.length < 2) continue;
source.addFeature(new ol.Feature({
geometry: new ol.geom.LineString([
pointsTurf[0],
pointsTurf[1],
]),
}));
} else {
console.log("No intersection found.");
}
}
}
newDrawFeature = newFeature;
map.on('click', function (event) {
const clickedCoordinates = event.coordinate;
console.log(clickedCoordinates);
if (!newDrawFeature) return;
const rectangleCoordinates = newDrawFeature.getGeometry().getCoordinates()[0];
const rectwidth = getLength(rectangleCoordinates[0], rectangleCoordinates[1]);
const rectheight = getLength(rectangleCoordinates[0], rectangleCoordinates[3]);
const numCols1 = (rectwidth / value);
const numRows1 = (rectheight / value);
const Ax = rectangleCoordinates[0][0] - rectangleCoordinates[1][0];
const Ay = rectangleCoordinates[0][1] - rectangleCoordinates[1][1];
const Bx = rectangleCoordinates[0][0] - rectangleCoordinates[3][0];
const By = rectangleCoordinates[0][1] - rectangleCoordinates[3][1];
const ta = value * 1.0 / (Math.sqrt(Ax * Ax + Ay * Ay));
const tb = value * 1.0 / (Math.sqrt(Bx * Bx + By * By));
for (let i = 0; i <= Math.ceil(numCols1)+1; i++) {
for (let j = 0; j <= Math.ceil(numRows1)+1; j++) {
if (map_grid_anchor == 'down_left') {
// Calculate the coordinates of the current grid cell
let cellTopLeft = [
rectangleCoordinates[0][0] - tb * Bx * (j-1) - ta * Ax * (i),
rectangleCoordinates[0][1] - tb * By * (j-1) - ta * Ay * (i)
];
let cellBottomRight = [
rectangleCoordinates[0][0] - tb * Bx * (j) - ta * Ax * (i-1),
rectangleCoordinates[0][1] - tb * By * (j) - ta * Ay * (i-1)
];
let cellTopRight = [
rectangleCoordinates[0][0] - tb * Bx * (j) - ta * Ax * i,
rectangleCoordinates[0][1] - tb * By * (j) - ta * Ay * i
];
// // Draw a new rectangle with the top-left corner of the grid cell as the starting point
let cellBottomLeft = [
rectangleCoordinates[0][0] - tb * Bx * (j-1) - ta * Ax * (i-1),
rectangleCoordinates[0][1] - tb * By * (j-1) - ta * Ay * (i-1)
];
let tempolygon = new ol.geom.Polygon(
[
[
cellBottomLeft,
cellBottomRight,
cellTopRight,
cellTopLeft,
cellBottomLeft
]
]
);
let isInside = tempolygon.intersectsCoordinate(clickedCoordinates);
if (isInside) {
const newFeature = new ol.Feature({
geometry: new ol.geom.Polygon(
[[
cellBottomLeft,
cellBottomRight,
cellTopRight,
cellTopLeft,
cellBottomLeft
]]
),
});
const poly1 = turf.polygon(drawFeature.getGeometry().getCoordinates());
const cellPolygon = turf.polygon(newFeature.getGeometry().getCoordinates());
const intersection1 = turf.intersect(cellPolygon, poly1);
if (intersection1) {
var coords = turf.getCoords(intersection1);
tempolygon = new ol.geom.Polygon(coords);
if (tempolygon.intersectsCoordinate(clickedCoordinates)) {
source.addFeature(new ol.Feature({
geometry: tempolygon,
}));
}
}
break;
}
}
if (map_grid_anchor == 'down_right') {
// Calculate the coordinates of the current grid cell
let cellTopLeft = [
rectangleCoordinates[1][0] - tb * Bx * j + ta * Ax * (i - 1),
rectangleCoordinates[1][1] - tb * By * j + ta * Ay * (i - 1)
];
let cellBottomRight = [
rectangleCoordinates[1][0] - tb * Bx * (j - 1) + ta * Ax * i,
rectangleCoordinates[1][1] - tb * By * (j - 1) + ta * Ay * i
];
let cellTopRight = [
rectangleCoordinates[1][0] - tb * Bx * j + ta * Ax * (i),
rectangleCoordinates[1][1] - tb * By * j + ta * Ay * (i) ];
// // Draw a new rectangle with the top-left corner of the grid cell as the starting point
let cellBottomLeft = [
rectangleCoordinates[1][0] - tb * Bx * (j - 1) + ta * Ax * (i - 1),
rectangleCoordinates[1][1] - tb * By * (j - 1) + ta * Ay * (i - 1)
];
let tempolygon = new ol.geom.Polygon(
[
[
cellBottomLeft,
cellBottomRight,
cellTopRight,
cellTopLeft,
cellBottomLeft
]
]
);
let isInside = tempolygon.intersectsCoordinate(clickedCoordinates);
if (isInside) {
const newFeature = new ol.Feature({
geometry: new ol.geom.Polygon(
[[
cellBottomLeft,
cellBottomRight,
cellTopRight,
cellTopLeft,
cellBottomLeft
]]
),
});
const poly1 = turf.polygon(drawFeature.getGeometry().getCoordinates());