i have an xml file with coordinates in it and i want to draw a line of those points on an Openlayers Map. I already have a Openlayers.Layer.Vector and i am creating a feature as follows:
var points = [];
for (var i = 0; i < coords.length; i++)
{
point = new OpenLayers.Geometry.Point(aPointsArray[i].lon, aPointsArray[i].lat);
points.push(point);
}
var geometry = new OpenLayers.Geometry.LineString(points);
var feature = new OpenLayers.Feature.Vector(geometry, null,
{
strokeColor: aColor,
strokeOpacity: 0.7,
strokeWidth: 3
});
aLayer.addFeatures([feature]);
This works a expected and i am seeing a line on my map. The problem is now, that the points i get from the .xml are changed dynamically by another program and I want to draw those changes live on my map. I already have a method that updates the maps periodically but how do i update the feature/geometry to the new points ?
Try aLayer.drawFeature(yourChangedFeature);
Related
Basically the problem is that after you rotate the camera, the points that are given as arguments in the callback for dragging are not what I expected. I'm guessing I have to Rotate the given points also but I just couldn't.
Can Someone explain what is going on, is this some kind of bug or what should I do in order the sprite to follow the mouse cursor?
Easiest way to explain the problem is to reproduce it:
1) Go to Phaser Example Runner
2) Copy- Paste this code:
var config = {
type: Phaser.WEBGL,
parent: 'phaser-example',
scene: {
preload: preload,
create: create
}
};
var game = new Phaser.Game(config);
function preload ()
{
this.load.image('eye', 'assets/pics/lance-overdose-loader-eye.png');
}
function create ()
{
var image = this.add.sprite(200, 300, 'eye').setInteractive();
this.cameras.main.setRotation(Math.PI);
image.on('pointerover', function () {
this.setTint(0x00ff00);
});
image.on('pointerout', function () {
this.clearTint();
});
this.input.setDraggable(image);
this.input.on('dragstart', function (pointer, gameObject) {
gameObject.setTint(0xff0000);
});
this.input.on('drag', function (pointer, gameObject, dragX, dragY) {
console.log(`x: ${dragX}, y: ${dragY}`);
gameObject.x = dragX;
gameObject.y = dragY;
});
this.input.on('dragend', function (pointer, gameObject) {
gameObject.clearTint();
});
}
3) Open the console, drag around the Eye and look at what coordinates are given.
4) If you remove line 24 (the rotation of the camera) Everything works as expected.
(The example is taken from Phaser 3 Official examples and a bit changed for the bug)
According to Phaser's API Documentation on the setRotation() method, the rotation given in radians applies to everything rendered by the camera. Unfortunately, your pointer isn't rendered by the camera so it doesn't get the same rotated coordinates. Not sure if this is a bug with the library or just a poorly documented exception, but I believe there is a workaround.
Create 2 variables to hold an initial position and a final position:
var image = this.add.sprite(200, 300, 'eye').setInteractive();
var initial = [];
var final = [];
Populate the initial position in your .on('dragstart') method:
this.input.on('dragstart', function (pointer, gameObject) {
initial = [
gameObject.x,
gameObject.y,
pointer.x,
pointer.y
];
gameObject.setTint(0xff0000);
});
Then, populate the final variable in your .on('drag') method:
this.input.on('drag', function (pointer, gameObject, dragX, dragY) {
final = [
gameObject.x, // not necessary but keeping for variable shape consistency
gameObject.y, // not necessary but keeping for variable shape consistency
pointer.x,
pointer.y
];
gameObject.x = initial[0] + (initial[2] - final[2]);
gameObject.y = initial[1] + (initial[3] - final[3]);
});
All we're doing here is keeping track of the change in pointer position and mimicking that change in our gameObject.
I figured an issue, while i have thousands of pins over the map, i am using drawing tool to draw shapes free hand and then executing the Intersection on "drawingEnded" event, While i could see the intersection should return more than it actually returns,
Am i missing something ? For Example, If there are around 500 pins under the new area drawn, Intersection method only returns 100 or few more,
My Spider Cluster Configuration:
` Microsoft.Maps.loadModule(['SpiderClusterManager'], function () {
spiderManager = new SpiderClusterManager(map, pinssame, {
//clusteredPinCallback: function (cluster) {
// //Customize clustered pushpin.
// cluster.setOptions({
// color: 'red',
// icon:'https://www.bingmapsportal.com/Content/images/poi_custom.png'
// });
//},
pinSelected: function (pin, cluster) {
if (cluster) {
showInfobox(cluster.getLocation(), pin);
} else {
showInfobox(pin.getLocation(), pin);
}
},
pinUnselected: function () {
hideInfobox();
},
gridSize: 80
});
});
`
Intersection Function Code which gets triggered after "drawingEnded" event:
` function findIntersectingData(searchArea) {
//Ensure that the search area is a valid polygon, should have 4 Locations in it's ring as it automatically closes.
if (searchArea && searchArea.getLocations().length >= 4) {
//Get all the pushpins from the pinLayer.
//var pins = spiderManager._data;
//Using spatial math find all pushpins that intersect with the drawn search area.
//The returned data is a copy of the intersecting data and not a reference to the original shapes,
//so making edits to them will not cause any updates on the map.
var intersectingPins = Microsoft.Maps.SpatialMath.Geometry.intersection(pins, searchArea);
//The data returned by the intersection function can be null, a single shape, or an array of shapes.
if (intersectingPins) {
//For ease of usem wrap individudal shapes in an array.
if (intersectingPins && !(intersectingPins instanceof Array)) {
intersectingPins = [intersectingPins];
}
var selectedPins = [];
//Loop through and map the intersecting pushpins back to their original pushpins by comparing their coordinates.
for (var j = 0; j < intersectingPins.length; j++) {
for (var i = 0; i < pins.length; i++) {
if (Microsoft.Maps.Location.areEqual(pins[i].getLocation(), intersectingPins[j].getLocation())) {
selectedPins.push(pins[i]);
break;
}
}
}
//Return the pushpins that were selected.
console.log(selectedPins);
return selectedPins;
}
}
return null;
}
`
The function is not returning accurate pin data,
Am i missing something here ?
Any Help Appreciated,
Thanks & Regards,
Shohil Sethia
UPDATE :
Just figured, It is an assumption ,I have multiple pins with same coordinates over the layer, Is this the reason that it returns only pins which intersects with different coordinates over the map ?,
Thanks & Regards,
Shohil Sethia
The method returns objects that represent the intersection, not the exact copies of input shapes. So yes, if multiple pushpins with the same coordinates are within the area, only one pushpin of that coordinates will be in the result, since that alone is good enough as a representation.
You can try the sample below, only one pushpin is returned:
// Creates a polygon of current map bounds
var polygon = new Microsoft.Maps.SpatialMath.locationRectToPolygon(map.getBounds());
// Creates a bunch of the pushpins of the same coordinates(map center)
var pushpin1 = new Microsoft.Maps.Pushpin(map.getCenter());
var pushpin2 = new Microsoft.Maps.Pushpin(map.getCenter());
var pushpin3 = new Microsoft.Maps.Pushpin(map.getCenter());
var pushpin4 = new Microsoft.Maps.Pushpin(map.getCenter());
var pushpin5 = new Microsoft.Maps.Pushpin(map.getCenter());
// Adds the shapes to map for some visualization
map.entities.push([polygon, pushpin1, pushpin2, pushpin3, pushpin4, pushpin5]);
// Only one pushpin is returned as result
var intersectingPin = Microsoft.Maps.SpatialMath.Geometry.intersection([pushpin1, pushpin2, pushpin3, pushpin4, pushpin5], polygon);
Have you checked if the number of results adds up when taking duplicate pins into account?
I got a solution, Since Intersection API ignore multiple pushPins with same coordinates, Therefore there is another API named as contains which takes two parameters which are the shape and the pushpin, and it returns whether it is contained in that shape or not in a boolean form. So true if pushpin is in that shape, and false in the other way.
function findIntersectingData(searchArea) {
//Ensure that the search area is a valid polygon, should have 4 Locations in it's ring as it automatically closes.
if (searchArea && searchArea.getLocations().length >= 4) {
var selectedPins = [];
for (var i = 0; i < pins.length; i++) {
if (Microsoft.Maps.SpatialMath.Geometry.contains(searchArea, pins[i])) {
selectedPins.push(pins[i]);
}
}
//Return the pushpins that were selected.
console.log(selectedPins);
//return updatePrescriberTerr(selectedPins);
return selectedPins;
}
return null;
}
Therefore in the above function the we can loop it from the pushPins array and form the intersection set accordingly based on the boolean values.
Hope it helps to those with similar scenario !
Regards,
Shohil Sethia
I have some model and want cover it with text.
I've rendered and bended TextGeometry but it is difficult to combine these two meshes.
(Аnd yes, I've tried the dynamic textures, this way prohibits the use of own fonts)
scrinshot of existing model
Perhaps there is another way to draw the text along the path?
As you want to cover it with text, why not to use textures.
You can set it from a picture with THREE.TextureLoader() or you can draw your own on a canvas and apply it to a texture with var texture = new THREE.Texture(canvas);
For exmaple:
var texture = new THREE.Texture(canvas);
texture.repeat.set(5, 1);
texture.needsUpdate = true;
See the jsfiddle example.
There you can uncomment those lines
//texture.wrapS = THREE.RepeatWrapping;
//texture.wrapT = THREE.RepeatWrapping;
and see, how the result will change.
UPD. I've updated the fiddle. Used the trick with WebFontLoader (from this SO)
WebFontConfig = {
google: {families: ['Monoton']},
active: function() {
init();
animate();
},
};
(function(){
var wf = document.createElement("script");
wf.src = 'https://cdnjs.cloudflare.com/ajax/libs/webfont/1.6.26/webfontloader.js';
wf.async = 'true';
document.head.appendChild(wf);
})();
I am trying to create groupe using fabricjs
var group = new fabric.Group(
[ circle, this.callerObject ],
{globalCompositeOperation:'xor'}
);
console.log(group);
this.mainCanvas.add(group);
But which globalCompositeOperation I have not set it is not working it always give the same result. I can make it using clear canvas, but I want to know, can I do it using native fabricjs methods?
I find solution myself)) to make it work need add globalCompositeOperation to the second object.
this.callerObject.set('globalCompositeOperation','xor');
var group = new fabric.Group(
[ circle, this.callerObject ]
);
But it have new problem)) this is work across all images)
To solve problem with cross showing
I have convert group to dataUrl, and to save state of object create new group, with object and image from previous group.
createXorGroup: function(object){
var self = this;
var baseStateTop = this.callerObject.top;
var baseStateLeft = this.callerObject.left;
this.callerObject.set('globalCompositeOperation','xor');
this.callerObject.set('active', false);
var group = new fabric.Group([ object, this.callerObject ]);
fabric.Image.fromURL(
group.toDataURL(),
function(image){
image.setOriginToCenter && image.setOriginToCenter();
self.callerObject.set('globalCompositeOperation','source-over');
self.callerObject.set('opacity', 0);
group = new fabric.Group([ self.callerObject, image ]);
self.mainCanvas.add(group);
group.setOriginToCenter && group.setOriginToCenter();
group.set('top', baseStateTop).set('left', baseStateLeft).setCoords();
group.setCenterToOrigin && group.setCenterToOrigin();
self.mainCanvas.remove(self.callerObject);
group.inCircle = true;
group.set('active', true);
},
{
originX: 'center',
originY: 'center',
top: this.callerObject.top,
left: this.callerObject.left
}
);
}
It is not native fabricjs object, I have override some properties for my work, but I hope you understand the main aim and it will be helpful
Continue to work with this library
To make xor to svg I have write this:
setGlobalCompositeOperation: function(object, type){
if(object.imageType == 'svg'){
for (var i = 0; i < object.paths.length; i++) {
this.setGlobalCompositeOperation(object.paths[i], type);
}
}else{
object.set('globalCompositeOperation', type);
}
}
But this do not work for text in mozila 31.6.0(( I'm looking solution for text
Can someone help me on this? I tried to shrink the size of the svg to half of its original size.
Here is the JSfiddle link
http://jsfiddle.net/wildleaf/ntzf3/
It runs fine with the original but if I uncomment the last line, the size is reduced to half but shape is changed.
You need to add transformation, not overwrite it.
See updated fiddle http://jsfiddle.net/ntzf3/1/
Code
...
var rsr = Raphael("canvas", 800, 400);
var elements = rsr.set();
for (var room in floorData) {
var r = floorData[room];
var ele = rsr.add([r]);
elements.push(ele);
if (r.data) {
ele.data('room', r.data['room']);
}
}
elements.forEach(function (el) {
var e = el[0];
e.transform(e.transform() + "s0.5,0.5,0,0");
});
Figured it out. It is overwriting the transform information in the original graph. I changed the last line to elements.transform("...s0.5,0.5,0,0") then everything works.