The application we had have been using SceneKit for a while and never had any issues with it until recently. Compared to earlier, now the render doesnt show the node in there actual color. Please see the images attached for more detail. If anyone has a solution to it then I would highly appreciate it.
iOS 12
https://image.ibb.co/i9sVGp/PNG_image.png
iOS 11
https://image.ibb.co/bBRCU9/IMG_0145.png
I had a similar problem in an app that downloads OBJ and MTL files with their texture images and renders them. All image texture materials were just blank white.
In my case, the problem was solved by manually disabling the emission property on the model's materials:
for (id object in self.modelNode.geometry.materials) {
((SCNMaterial*)object).emission.contents = [UIColor blackColor];
}
I have no clue why the emission component was set at all and why this changed with iOS 12/13.
I fixed this by changing the 'Emission' property from white to black under the material settings in xcode. Save the file as a scene-kit file to avoid having to deal with it
Select the model
Go to the panel on the right
I was able to solve my issues for the moment by choosing OpenGL ES as render mode:
I was able to solve this issue by setting the following properties:
self.scnView.pointOfView.camera.wantsHDR = true
self.scnView.pointOfView.camera.minimumExposure = -1
self.scnView.pointOfView.camera.maximumExposure = -1
Apart from these properties, you can also set
emission and lightingmodel geometry properties of your node.
Related
I am trying to do something I feel is very simple, yet seems that I am clearly misunderstanding a crucial piece of the mapbox addlayer feature.
The Goal
Create dynamically identified icons, based on a features data value (e.g. geojson feature data vale title: "walmart"). Essentially just adding dynamic store icons from the sprite image when those locations are queried via tilequery. picture representation here
The problem
I keep getting an error when trying to use the sprite values from the style. Error: util.js:349 Image "airport-11" could not be loaded. Please make sure you have added the image with map.addImage() or a "sprite" property in your style. You can provide missing images by listening for the "styleimagemissing" map event.
I see tons of resources talking about sprites, but none discuss how to exactly implement them in this fashion. I have even tried querying the sprite and then adding the values using dot notation to access sprite values. This gives an error of "undefined" and invalid value.
Example code:
map.addLayer({
id: "tilequery-points",
type: "symbol",
source: "tilequery", // Set the layer source
layout: {
"icon-image": [
"match",
["get", "title"],
["HEB"],
"H-E-B_logo",
["Pilot Flying j"],
sprite.Pilot_Travel_Centers_logo,
// "Pilot_Travel_Centers_logo",
["Dollar General"],
"Dollar_General_logo",
["Cumberland Farms Corp"],
"Cumberland_Farms_logo (1)",
["CEFCO"],
"CEFCO-convenience-stores-Logo_510px",
["BJs Wholesale Inc"],
The Question
How do I access the sprite values and not get an error?!!!
Thanks for the help! I Wouldn't ask if I didn't need it!
UPDATE
I have figured out that to use sprite images inside of any layer, the images will automatically be available if you have them in your Mapbox studio sprite image collection. The confusion was that previously, I was not able to use them from link. However, it should work automatically.
Hope it helps!
It's true the documentation about sprites is not super clear. I'll try to summarise (simplifying a bit).
A Mapbox GL style has one sprite. That's a PNG containing all the icons, plus a JSON file specifying what each icon is called (its icon ID), and where it located within the PNG. The sprite is specified by giving a URL as the sprite property: https://docs.mapbox.com/mapbox-gl-js/style-spec/sprite/
You can also add images to the sprite dynamically after the map loads, with map.loadImage and map.addImage, specifying the icon ID.
To display an icon, you use that same ID in a symbol layer: "icon-image": "myicon".
You can run into trouble when you try to combine your own icons with those in a Mapbox basemap (which are Maki icons with names like `airport-11').
To combine them, you can do one of these three things:
upload your icons to a style in Mapbox Studio
load your icons dynamically
generate a new sprite sheet offline, using something like mbsprite
I don't know what you meant about "dot notation", but no, that's not the right path.
So I read on the docs that responsiveness for amchart 4 is still currently under development, and so perhaps that explains my difficulties here.
I'm trying to create a barchart that will shrink properly without distorting how the data is displayed. I've tried shrinking the parent container with an #media rule, but that distorted the data.
What's happening: When I shrink the view (i.e. open up inspector or run the web app on a smaller machine) half the category labels on the X-axis are disappearing for some strange reason. It seems to be every other label exactly is gone.
I've tried setting:
categoryAxis.minWidth = 0;
As an approximation of v3's minHorizontalGap property but of course they aren't the same.
I've tried setting the column width in hoped that that would influence the labels.
series.columns.template.width = am4core.percent(50);
And finally I've tried setting both the whole chart to responsive, and the categoryAxis:
categoryAxis.responsive.enabled = true;
But doing this gives me the following error which I can't find support for online:
bootstrap:114 Uncaught (in promise) Error: Loading chunk vendors~responsivedefaults failed.
I'm not sure what the problem is or how to resolve it, I can't believe they'd release a version of amcharts that didn't have responsivity in this age, and so I think it has to be something I'm doing wrong.
So I found the v4 equivalent to minHorizontalGap and that has solved the problem for me.
categoryAxis.renderer.minGridDistance = 60;
It's as simple as that. I still don't know why responsive.enabled doesn't work, but this is a satisfactory solution.
I am loading image from a URL and it's works as expected.
Scenario when the URL no longer valid, i.e if the image was deleted and I do see the default image displays since I created EncodedImage from the Label icon.
I would like to know if there is anyway I can check if the image has actually loaded from the URL?
What I want to achieve is set a different image to a background if the URL image is not found.
Please advise.
Thank you.
The closest thing is to check if the URLImage's isAnimation() method returns true. If it returns true, then the actual image hasn't been loaded yet. If it returns false, it means that the image is already loaded.
Which system do you use to download the image ? Is the image stocked in the Storage, in the FileSystem ?
If you have dowloaded the image using the ConnectionRequest, you may override it's handleErrorResponseCode method and do something when you have the network error code corresponding to no image ( i.e. 204 : no content).
There are many workarounds for this problem. I use this jQuery one
I have a web application that uses Dygraphs to create charts.
The application allows a user to create multiple Dygraph charts (each with their own Y-Axis) that will be stacked on top of each other.
Here's an example of what the multiple Dygraphs look like on a PC browser: Notice that the example displays three different Dygraphs each having their own Y-axis, but the X-axis is hidden for the top 2 charts and visible on the bottom chart.
I will allow the user to save the chart to disk as a PNG. - The way I currently save the multiple Dygraphs as one PNG is:
Create a target canvas that will be used to contain all the visible Dygraphs
Extract each canvas out of each Dygraph, then add each canvas to the target canvas **
Create a PNG via the .toDataURL() function on the target canvas
Here's an example of what the above screenshot looks like when saved as one PNG: (This is exactly what I want from the PNG)
The procedure works fine on browsers on a PC. But when I attempt to save the multiple Dygraphs into one PNG on a phone/tablet browser, the resultant PNG doesn't match the graph that is visible on the screen.
Example:
Here's what the multiple Dygraphs look like on an iPad (screenshot)
And here's what the resultant PNG looks like (Notice how the width and height of each chart does not match the actual iPad display).
I don't understand why the PNG is rendered correctly when I use a PC browser, but is not rendered correctly when I use a browser on a mobile device.
I'm not sure if this problem is due to limitations of the Canvas.toDataURL() function or if this is a Dygraphs problem or something else. I'm fishing for advice that may point me in the right direction and/or shed light on this particular problem.
**I should mention that I use Juan Manuel Caicedo Carvajal's Dygraph-Export extension
I'm guessing the Problem occurs, because the generated canvas isn't rendered fully to the responsive screen of an iPad.
You can try to export the original canvas (instead of generating a new one with the said library) yourself with toDataUrl https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toDataURL
Dygraphs generates 2 canvas, one for the legend and one for the actual graph and lays them ontop of each other. So make sure you choose the right one (not the _hidden_canvas). If the examples works you can draw the legend onto the graph canvas with canvas.drawImage(otherCanvas)
How to Copy Contents of One Canvas to Another Canvas Locally
Hope this helps. Keep me updated!
My workaround/hack for the problem stated in my OP was to make a change to the Dygraph source in the Dygraph.getContextPixelRatio function.
Notice in the code below that I set devicePixelRatio = 1
dygraph-combined.js
Dygraph.getContextPixelRatio = function (context) {
try {
//var devicePixelRatio = window.devicePixelRatio;
var devicePixelRatio = 1; // Hack!!!
var backingStoreRatio = context.webkitBackingStorePixelRatio ||
context.mozBackingStorePixelRatio ||
context.msBackingStorePixelRatio ||
context.oBackingStorePixelRatio ||
context.backingStorePixelRatio || 1;
if (devicePixelRatio !== undefined) {
return devicePixelRatio / backingStoreRatio;
} else {
// At least devicePixelRatio must be defined for this ratio to make sense.
// We default backingStoreRatio to 1: this does not exist on some browsers
// (i.e. desktop Chrome).
return 1;
}
} catch (e) {
return 1;
}
};
In my case, this hack fixed my problem (stated in the OP) and didn't negatively affect any other parts of my application that uses Dygraphs. That said, if you find a better/correct way to fix the problem stated in the OP, please share.
I have a custom list renderer that has a logo for a business in it. It has a label Logo_URLImage that has the placeholder image. In my code I get the data and assign HashMaps to the list model, h.put("Logo_URLImage",imageURL); where imageURL is a string that has the absolute URL to the image.
On Android it seems to always work, but most of the testing has been on iOS devices. What happens is that images are updated as you'd expect the first time or two that you run it. A run later on will show blank images (flash the place holder image and then blank) and once that happens images will never come back.
Any thoughts on what might be causing this?
Check that you defined the LogoName map entry. Check that it is unique per image?
Check that it doesn't include special characters that might cause an issue.