I am trying to modify the bounding rectangle of an object in paperjs.
Here is my code:
project.currentStyle = {
fillColor: 'green',
strokeColor: 'black'
};
var circle = new Path.Circle(new Point(150, 150), 50);
var bounds = circle.bounds;
bounds.insert(2, new Point(bounds.center.x, bounds.top));
bounds.insert(2, new Point(bounds.center.x, bounds.top-25));
bounds.insert(2, new Point(bounds.center.x, bounds.top));
I am getting an error that bounds.insert is not a function.
If this is not possible, how can I add segments to the bounding rectangle?
There is a difference between the Path.Rectangle() method which create a rectangular Path, and a Rectangle which corresponds to the abstract geometric shape:
A Rectangle specifies an area that is enclosed by it’s top-left point (x, y), its width, and its height. It should not be confused with a rectangular path, it is not an item.
You can easily create a Path from your circle bounds:
let rectanglePath = new Path.Rectangle(circle.bounds);
rectanglePath.strokeColor = 'red';
Related
Please find the google mapsApi documentation https://developers.google.com/maps/documentation/javascript/shapes#editable
Please zoomout to world view and then expand the region selection towards right in single attempt. At some point you could observe that the selection became unstable and it selects entirely different section of the world.
By default the rectangle selection tool seems to look for shortest possible path to complete the shape. This creates a strange behavior when attempting to draw a very very large region.
I wanted to click and drag a very large region that covered a large geography. I was dragging West to East. Once the size of the object was very large, the selection reserved and was covering a completely different section of the world.
I attempt to expand a boundary to include the entire world. When the boundary goes far enough, again the region appears to be the minimal/smaller area.
Expected behavior was the selector to continue expanding in the direction the user intends. In this case I would expect the selector to continue its west to east expansion.
https://developers.google.com/maps/documentation/javascript/shapes#editable
var bounds = {north: 44.599, south: 44.490, east: -78.443, west: -78.649 }; // Define a rectangle and set its editable property to true. var rectangle = new google.maps.Rectangle({bounds: bounds, editable: true});
Please tries to expands rectangle to further right
Is there a solution to resolve the scenario mentioned?
Please let me know if further details required.
As I said in my comment, when you drag it "too far", the rectangle left and right coordinates (longitude) get inverted.
In other words, if you drag it too far to the right, right will become left and left will be where you dragged the right side to. And the opposite in the other direction. So by comparing where was the left with where is the right or vice-versa, you can detect if your rectangle left and right got inverted and invert it again... This way you can achieve what you want.
And of course if you drag the right side further to the right than where the left was (or the other way around), it will reset, as you can't have a rectangle overlapping itself around the globe.
The UI can be a bit confusing though, as you can see the rectangle lines get inverted but you can't do much about that.
var map;
function initialize() {
var mapOptions = {
center: new google.maps.LatLng(0, 0),
zoom: 2,
zoomControl: false
};
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
// Set origin bounds
var originBounds = new google.maps.LatLngBounds(
new google.maps.LatLng(-20, -100),
new google.maps.LatLng(20, 20)
);
// Get left/right coords
var left = originBounds.getSouthWest().lng();
var right = originBounds.getNorthEast().lng();
// Create editable rectangle
var rectangle = new google.maps.Rectangle({
bounds: originBounds,
fillColor: 'white',
fillOpacity: .5,
editable: true,
map: map
});
// Check for rectangle bounds changed
google.maps.event.addListener(rectangle, 'bounds_changed', function() {
// Get currents bounds and left/right coords
var newBounds = rectangle.getBounds();
var newLeft = newBounds.getSouthWest().lng();
var newRight = newBounds.getNorthEast().lng();
if ((newRight === left) || (newLeft === right)) {
// User dragged "too far" left or right and rectangle got inverted
// Invert left and right coordinates
rectangle.setBounds(invertBounds(newBounds));
}
// Reset current left and right
left = rectangle.getBounds().getSouthWest().lng();
right = rectangle.getBounds().getNorthEast().lng();
});
}
function invertBounds(bounds) {
// Invert the rectangle bounds
var invertedBounds = new google.maps.LatLngBounds(
new google.maps.LatLng(bounds.getNorthEast().lat(), bounds.getNorthEast().lng()),
new google.maps.LatLng(bounds.getSouthWest().lat(), bounds.getSouthWest().lng())
);
return invertedBounds;
}
initialize();
#map-canvas {
height: 150px;
}
<div id="map-canvas"></div>
<script src="https://maps.googleapis.com/maps/api/js"></script>
I want to add some text on the rectangle on here maps. I`ve already tried this:
var obj = new H.map.Rect(boundingBox, {
style: {
fillColor: 'rgba(0,0,0,0.2)',
strokeColor: 'rgba(0,0,0,1)',
lineWidth: 3,
content: 'fsd'
},
});
but 'content' property in this case does nothing. Is it possible to add text or content on rectangle in HERE maps?
For this case we would recommend to use H.map.Overlay (https://developer.here.com/documentation/maps/topics_api/h-map-overlay.html) object that gives you option to put arbitrary bitmap within the given bounding box. So you can use the HTML canvas to draw text and then H.map.Overlay to put it on the map.
I'm using leaflet with custom CRS.Simple projection. If I draw a polyline at the page Load it is more or less drawn ok (Although much more accurate in firefox than in chrome) but if I drag the map the polyline remains in the same place of the browser window, so then appears shifted respect of the background map.
Example:
Initial load
After drag the map, the map moves but the polyline remains in the same place
To add the polyline I'm converting the coordinates to the CRS.Simple projection. I don't think there is a problem here as every other map marker or text appears correctly
.....
//initialize leaflet map
map = L.map('map', {
maxZoom: mapMaxZoom,
minZoom: mapMinZoom,
zoomControl: false,
crs: L.CRS.Simple //simple coordinates system
}).setView([0, 0], mapMaxZoom);
//set the bounds of the map to the current dimension
var mapBounds = new L.LatLngBounds(
map.unproject([0, mapHeight], mapMaxZoom),
map.unproject([mapWidth, 0], mapMaxZoom)
);
//load the tiles
map.fitBounds(mapBounds);
L.tileLayer(mapData.info.tiles+'/{z}/{x}/{y}.png', {
minZoom: mapMinZoom,
maxZoom: mapMaxZoom,
bounds: mapBounds,
attribution: '',
noWrap: true,
continuousWorld: true
}).addTo(map);
.....
var pointList = [getMapCoordinates(1750,1750),
getMapCoordinates(1520,1764),
getMapCoordinates(1300,1560),
getMapCoordinates(1132,1258),
getMapCoordinates(1132,1060),
getMapCoordinates(926,960)];
polyline = new L.Polyline(pointList, {
color: 'red',
weight: 3,
opacity: 0.5,
smoothFactor: 1
});
polyline.addTo(map);
....
function getMapCoordinates(px,py)
{
//as we use simple system, transform the point (based on pixel) on map coordinates that leaflet understand
return map.unproject([px, py], map.getMaxZoom());
}
Any idea what I'm doing wrong, or is it a bug? Any workaround would be appreciated
Ok, it seems the problem was in stable version (0.7.3) Using dev version (1.0-dev) works ok and even solves the problem with the different browser drawing
When drawing large circle onto a Google map, when the circles get really large (thousands of miles translated to meters) the circles start to sine wave over the map.
Example
Here's the code to set up and draw the circles:
//larger, outer circle
var options = {
strokeWeight: 0,
fillColor: '#AA0000',
fillOpacity: 0.5,
map: map,
radius: distance
};
//smaller inner circle
var options2 = {
strokeWeight: 0,
fillColor: '#AA0000',
fillOpacity: 0.5,
map: map,
radius: distance/2
};
circles[circles.length]=new google.maps.Circle(options);
circles[circles.length]=new google.maps.Circle(options2);
for(var i=0; i<=circles.length-1; i++)
{
circles[i].bindTo('center', marker, 'position');
}
Is there a way to avoid that?
This is an exciting question!
If you're upset about the repeating sin pattern, but actually want your circle to cover a geographic area on the earth defined by radius in meters then you're best bet is to increase the zoom level (or shrink the width of the map) to reduce the overall size of the are being presented. Alternatively, you could reduce the distance to a value that doesn't encompass the north pole (which is what I believe would trigger the awkward sin pattern)
If you're trying to draw a circle in the geometric, not geographic, sense then the Google Maps circle overlay isn't for you. Instead, you should use a GroundOverlay (rendering a transparent PNG server-side somewhere) or CustomOverlay (the technically more advanced solution). A CustomOverlay could include a DIV with a circle you've drawn using any HTML technique like CSS or an SVG.
I'm using Google maps api v3. In the middle of the map there is a (custom) flag marker with large transparent areas around the flag body. Under the flag icon there are another markers that are inaccessible because of dead transparent areas. Is there any way to set flag marker to be click-through? I cant find solution.
Yes, it is possible the Marker class has a shape property that takes a MarkerShape object. This describes the clickable region for the Marker.
Here is Google's Example. They have a custom flag image and adjusted the shape so that only the rectangular flag section is clickable. With the MarkerShape object you can draw a Circle, Retangle, or Polygon shape area.
Google example code segment:
function setMarkers(map, locations) {
// Add markers to the map
// Marker sizes are expressed as a Size of X,Y
// where the origin of the image (0,0) is located
// in the top left of the image.
// Origins, anchor positions and coordinates of the marker
// increase in the X direction to the right and in
// the Y direction down.
var image = new google.maps.MarkerImage('images/beachflag.png',
// This marker is 20 pixels wide by 32 pixels tall.
new google.maps.Size(20, 32),
// The origin for this image is 0,0.
new google.maps.Point(0,0),
// The anchor for this image is the base of the flagpole at 0,32.
new google.maps.Point(0, 32));
var shadow = new google.maps.MarkerImage('images/beachflag_shadow.png',
// The shadow image is larger in the horizontal dimension
// while the position and offset are the same as for the main image.
new google.maps.Size(37, 32),
new google.maps.Point(0,0),
new google.maps.Point(0, 32));
// Shapes define the clickable region of the icon.
// The type defines an HTML <area> element 'poly' which
// traces out a polygon as a series of X,Y points. The final
// coordinate closes the poly by connecting to the first
// coordinate.
var shape = {
coord: [1, 1, 1, 20, 18, 20, 18 , 1],
type: 'poly'
};
for (var i = 0; i < locations.length; i++) {
var beach = locations[i];
var myLatLng = new google.maps.LatLng(beach[1], beach[2]);
var marker = new google.maps.Marker({
position: myLatLng,
map: map,
shadow: shadow,
icon: image,
shape: shape,
title: beach[0],
zIndex: beach[3]
});
}
}
Yes, set the clickable property to false. for example:
const newMarker = new google.maps.Marker(
position: {
lat: 10,
lng: -66
},
clickable: false // <------
)