A script that splits an ol3 LineString geometry into n segments of the same length, creates a point geometry at each split point and returns an array of the point geometries.

splitLine.js

/**
 * Accepts an ol.geom.LineString instance and a number (the desired number of segments) as parameters
 */
var splitLineString = function(geometry, n) {
  var splitPoints = new Array(n);
  var coords = geometry.getCoordinates();
  var coordIndex = 0;
  var startPoint = coords[coordIndex];
  var nextPoint = coords[coordIndex + 1];
  var segmentLength = geometry.getLength() / n;
  var currentSegmentLength = 0;
 
  for (var i = 0; i <= n; i++) {
    var distanceBetweenPoints = calculatePointsDistance(startPoint, nextPoint);
    currentSegmentLength += distanceBetweenPoints;
 
    if (currentSegmentLength < segmentLength) {
      coordIndex++;
      startPoint = coords[coordIndex];
      nextPoint = coords[coordIndex + 1];
      continue;
    } else {
      var distanceToSplitPoint = currentSegmentLength - segmentLength;
      var splitPointCoords = calculateSplitPointCoords(startPoint, nextPoint, distanceBetweenPoints, distanceToSplitPoint);
      var splitPoint = new ol.geom.Point(splitPointCoords);
      splitPoints.push(splitPoint);
      startPoint = splitPoint.getCoordinates();
      currentSegmentLength = 0;
    }
  }
 
  return splitPoints;
};
 
 
var calculateSplitPointCoords = function(startNode, nextNode, distanceBetweenNodes, distanceToSplitPoint) {
  var d = distanceToSplitPoint / distanceBetweenNodes;
  var x = nextNode[0] + (startNode[0] - nextNode[0]) * d;
  var y = nextNode[1] + (startNode[1] - nextNode[1]) * d;
 
  return [x, y];
};
 
 
var calculatePointsDistance = function(coord1, coord2) {
  var dx = coord1[0] - coord2[0];
  var dy = coord1[1] - coord2[1];
 
  return Math.sqrt(dx * dx + dy * dy);
};

In the if section, it's better to change to this

if (currentSegmentLength < segmentLength) {
    coordIndex++;
    if(coordIndex< coords.length - 1) {
        startPoint = coords[coordIndex];
        nextPoint = coords[coordIndex + 1];
        i--;
        continue;
    }
    else {
        break;
    }
}

@shenchaoran, @Kenny806: When I am drawing marker icon like pin the line's start and end point doesn't contain any pin. For example my desired number of segment in 2 and if I draw the line the marker pin just drawn middle of the line and last of the line instead I want to have those pins in the first point of the line and last point of the line. Is it possible?