Method GetEntitiesFromPolygon

Namespace

vdWebLibrary

Assembly

JsPropertiesExtractor.dll

GetEntitiesFromPolygon(object, object)

A crossing polygon selection Returns an array of vdraw entities that cross the specified closed polygon. Even if a small part of an entity lies inside the polygon, it is added in the array.

public object GetEntitiesFromPolygon(object pts, object coordSystem)

Parameters

pts object

An array of points

coordSystem object

The coordinate system of the passed pts

0 -or- false -or- undefined for pts are in pixels.

1 -or- true for pts are in WorldCS.

2 for pts are in current View.

Returns

object

An array of selected entity objects

Examples

Prompt the user to select a polyline and make a crossing polygon selection from selected polyline boundary

vdcanvas.GetUserPoint(_onActiongetPointEntitySelection);
function _onActiongetPointEntitySelection(action, status) {
var vdcanvas = action.vdrawOwner();
if (status == 'start') {
vdcanvas.Prompt('pick an polyline that defines a close polygon for selection');
} else if (status == 'end') {
vdcanvas.Prompt('');
if (!action.IsCanceled()) {
var pt = vdcanvas.WorldToPixel([action.ResValue[X],action.ResValue[Y],0]);
var entity = vdcanvas.GetEntityFromPoint(pt[X], pt[Y]); //scan for an entity under the pick point
if (!entity || entity._t !== vdConst.vdPolyline_code) return; //check if entity exist and is a polyline type
var ents = vdcanvas.GetEntitiesFromPolygon(pts, true);
var ents = vdcanvas.GetEntitiesInWindowPolygon(pts,true);
for (var i = 0; i  < ents.length; i++)  ents[i].HighLight = true;//highlight the selected figures
setTimeout(vdcanvas.redraw);//post a redraw
}
}
}