I have been attempting to create a circle based on the point/coordinate where a user clicks. While I know how to generate a point and found a function that can create a circle based on said point (similar to a buffer or range ring), it appears to only function with x,y points at (0,0). After trying to convert my longitude and latitude coordinates to X and Y using ol.proj.transform, I was unsuccessful in rendering a circle at all.
Function to create circle
This is the desired outcome:
function createCircle(circleCenterX, circleCenterY, circleRadius, pointsToEnd) {
let angleToAdd = 360 / pointsToEnd;
let coords = [];
let angle = 0;
for (let i = 0; i < pointsToEnd; i++) {
angle += angleToAdd;
let coordX = circleCenterX + circleRadius * Math.cos(angle * Math.PI / 180);
let coordY = circleCenterY + circleRadius * Math.sin(angle * Math.PI / 180);
coords.push([coordX, coordY]);
}
return coords;
}
function addMarker(coordinates) {
console.log(coordinates);
var marker = new ol.Feature(new ol.geom.Point([708683.3598450683, 1850098.1965979263]));
marker.setStyle(new ol.style.Style({
image: new ol.style.Circle({
radius: 5,
fill: new ol.style.Fill({
color: 'red'
})
})
}));
vectorSource.addFeature(marker);
}
function addCircle(coords) {
// var lonlat1 = ol.proj.transform([coords[0], coords[1]], 'EPSG:4326','EPSG:3857');
// console.log('var lonlat1',lonlat1)
var circleCoords = createCircle(708683.3598450683, 1850098.1965979263, 20, 180);
console.log(circleCoords);
var polygon = new ol.geom.Polygon([circleCoords]);
polygon.transform('EPSG:4326', 'EPSG:3857');
polygon = new ol.Feature(polygon);
vectorSource.addFeature(polygon);
}