Develop Reference

Sprites are distorted when scaled

I have a game I'm working on with Phaser 3, and I have an icon for a sword in the player's inventory:
But when I scale it using sprite.setScale(0.5), I get this monstrosity:
Any idea why this happens? thanks!

Ok, so the problem seems to be fixed by making sure the end value for the height and width values were integers, my actual code for scaling was sprite.setScale(0.45), and changing the value to 0.5 was a quick fix, getting the much improved end result of this:
PS: Thanks to #winner_joiner for the suggestion

Qualtrics: Custom slider range with embedded data using javascript

I want to create one single slider in Qualtrics where the min, the MAX and the intervals are chosen according to 4 different embedded data. I need help with the Javascript.
Why do I need one single slider? I need a single slider because I have 16 questions in total, and it is easier to recall 16 questions ID rather than 64 different questions ID.
How should the slider change? I need the slider MAX to be either 1, 10, 100 or 177. Moreover, I always need to have 100 possible choices. Therefore, I need to introduce 2, 1, 0 and 0 decimals, respectively.
Why Javascript? Qualtrics does not allow dynamic custom slider values.
What I have tried so far:
I tried using the default options, but they are not helpful.
I tied looking for resolved questions on StackOverflow but only found this thread: Qualtrics: Dynamically adjusting max value of slider

What your post asks is not a specific question, but rather an entire project. To aid you in this, I have broken up your question into subproblems, all of which can be resolved with simple googling.
First, set up your slider so that it ranges from 0 to 100 - that will ensure that the user always has 100 options. You can then perform a calculation to adjust that to any range you would like based on your embedded data (information how to get embedded data in JS can be found in this post or on the Qualtrics JS API). For more information on how to scale to any rage, here's a good place to start. This calculation is critical as you will use it later on to set the exact value of the grid lines (i.e. intervals) as well as the displayed value (if you opt to display value).
NB: Unfortunately, you are forced to set up the slider to range from 0-100, as you cannot set up more than 20 grid lines. If you could, you could have just set up 100 grid lines and removed the grid lines values and used labels instead for guidance, but there you go.
Next, start with a slider that has a single grid line in the options. You can now adjust these grid lines to your intervals. Specifically, to get the field where these gridlines are defined, get the ul with class name numbers in your slider question. This could look something like this:
let numbers = document.getElementById('QID1').getElementsByClassName('numbers')[0]
This numbers variable will now contain an HTML element with its children being a list of li elements, with each defining a different interval - calculate those interval however your heart desires and add them to the numbers element on the DOM. Tip: to see how this works, play around by examining the DOM when you vary the number of grid lines. Hint: careful when you set the widths (as this is your property to calculate) - for 2 grid lines or 4, all of the li elements have a width of 50 or 25, respectively, but for 11 grid lines the two li elements with classes first and last have width of 5 and the rest of the in-between li elements have a width of 10.
To customize the number that is shown in those intervals (to however many decimal places you want), adjust the innerHTML of those li elements.
Your next step is to make sure that if you do end up showing the value to the participant, then that value can only be a "legit" value. After all, we set the slider from 0 to 100, but it could be 50 to 250 and it must only show values 50-52-54 etc. To achieve that, find the element that displays the value and overwrite it with your calculation (the current value scaled to your desired range). To find the elements, use something like this:
document.getElementById('QID1~1~toolTipBox')
This will look for question with ID QID1 and then look at the first choice's toolTipBox. Overwrite the contest by change its innerHTML.
Finally, don't forget to adjust your data when you process it later on. After all, you have access to all embedded fields in the data, simply scale those to get the actual values (as the ones you will get will most likely be 0-100, though I am not 100% sure how Qualtrics decides what value to save in the data).

Slider range with custom styles and dynamic values

I'm working on slider for which I want some odd behaviour. I was looking for solutions and librarys but didn't find nothing that fully fits what I need and I have some problem with building it.
I'm trying to create slider for range value. With steps, dynamic min and max value.
Also I found problematic to work with style effect.
Example:
slider with range from 0 - 50
step set to 10
min value is 16 (start value should be same) - to this point slider should be red
start point should be on 16 (which is hard to make when I want steps)
when value is >16 different color and for everything that is not selected like regular grey.
I was trying to use nouislider and overall everywhere I could. If anyone has any idea or solution I will be grateful for any help.

You can set this up in noUiSlider using the "non-linear ranges" and "padding" features.
Basicaly, you'd set up three ranges:
0 to 16, no step
16 to 20, step of 4
20 to 50, step of 10
You'd then disable the first sub range by setting a padding of [16, 0].
The styling you've described can be achieved by styling .noUi-target with your background colors.

move rotated ol.style.text relative to a given point in openlayers 3

I will try to explain what I'm trying to accomplish.
I have a point feature to which I set an array of 2 styles: 1 style represents a rotated image at the given point, the second one should be a rotated text at a fixed distance of the given point.
To clarify things I've created an image. I want to achieve the situation on the right. (the x,y,z lines and labels are for explanation purposes). I want to move the text over a fixed distance z. The rotation angle is also variable.
So what I did was give a rotation to the ol.style.text object and then give the text an offset for Y but then the text gets pulled straight below the point.
What I am looking for is a method to offset the text for a given distance, taking the rotation in account, without having to manually set the ofssetX and offsetY.
One solution here is indeed to use geometry.. calculate x and y offset based on the angles and the given z , using the sin formulas and the Pythagorean theorem, but I would like to avoid those calculations and find a more simple resolution.
I am using the latest version of openlayers3, currently v3.16.0
Thanks in advance.

Coloring a image partialy using javascript based on user selection

i have this "Time line", its horizontal it goes like this
00|01|02|03|etc up to 23
Every span that contains a number is 17 pixels, and the "|" line is 1 pixel, the whole image is 431x20 pixels.
I have 2 tags, the user is supposed to pick a "Start" time and a "End" time, i want to know how i can color the image partially using javascript, i am thinking i could put some CSS over it, such as over the image, but i have no idea how to do this using javascript, any help would be greatly apriciated.

It strikes me as fairly simple to absolutely position a DIV on top of your image, with the same height, whatever color you choose, and some appropriate opacity, setting its left edge to (and this is a quick calculation and might be wrong) image.left + (18 * from), and its width to 18 * (to - from + 1) - 1.
But is there a great reason to make your timeline an image in the first place? It sounds even better to me to have a collection of nodes that either have or don't have a "selected" class, each with a "00" - "23" text marker on them. No images needed.