brighten | Clear terminal screen but keep output history | Command Line Interface library

I'm trying to implement line-of-sight visibility / fog-of-war for my 2D top-down game, and found this article which has a simple and efficient algorithm which involves shooting rays at the edges of rectangles to calculate a list of triangles to brighten.

However, my game uses tiles, so it would be very inefficient to run this against the 150x150 (22,500) tiles surrounding the players every frame. Rather, it would be better to instead convert the tile-map to a list of rectangles and then run the line-of-sight algorithm against that. For example, if this were my tile-map (where 1 is a solid tile and 0 is a free tile):

I have a cartoon of an antique "detour" sign that has cataphote reflectors embedded in the letters. I want the reflectors to brighten as the image is hovered. That's easily done, I know, simply by swapping out a version of the image with the reflectors darkened with an image of them brightened on hover (per the markup below). However, doing it this way makes the reflectors appear to blink on or off. I want them to get increasingly bright as the cursor nears the center of the image and, of course, dim as the cursor moves away from it, as would occur in real life. (If your headlights beamed at the reflectors at an oblique angle, the light they reflect back would be dimmer than if your headlights hit them straight on.)

My thought is just to increase the opacity of the brightened version of the image in response to the position of the hovering cursor. So, what I need (I think) is a script that detects the cursor position and increases or decreases the opacity accordingly: opacity: 0; at the edge and opacity: 1; at the center. Probably not too challenging for someone adept in javascript/jquery. I've hunted around for a script that does that or something very close to it but haven't been able to locate one that is close enough for me to modify.

I have an additional issue in that in Firefox, at least, the hover image "flicks" the first time it is invoked. I've tried all of the preloading suggestions I could find here on stackoerflow but none of them work. I found that a sprite solved the flicking problem, but wasn't sure how that would work with the way I want the image to animate. Presuming non-sprite images are the way to go maybe if the script invokes the "bright" version of the image at an initial opacity of 0 as the cursor crosses the threshhold, it will also hide the loading "flick...?" Just a guess. Alternatively, I could redesign the hovered version so that it is just the reflectors if that would solve everything else.

Finally, as you can see, the sign is a button that returns a random page. Assuming what I need to solve this problem is a script, can I run both scripts off of the same id (#detour) or should this script use a class name instead? (I am clearly an example of a little knowledge being a dangerous thing.)

Anyway, here's what I've got.

Is there a proper and smooth CSS solution for a CSS image hover effect that deals with 2 transitions:

• brighten the image itself on hover using background-color and opacity
• set the playbutton opacity to 100% on hover

my solution's not perfect, the play button's still flickering and not animated smooth. i'm looking for a cross browser solution as well...

feel free to see my example and what i tried at https://codepen.io/marcusegger/pen/WNReBpa because it's not so easy to explain.

HTML:

Some text is overflowing the div and won't wrap onto the next line. I don't want to use word-break because I want the whole words to be displayed. In this example "medieval, renaissance and" are not wrapping, this line is overflowing the div at md width. I'm using Bootstrap columns.

So, I have a textwidget in my main class and I made another class that contains a TextFormField. Depending if the textfield is empty, I would like to change the color of the text from my main class.

If I put the textfield in the same class as my text widget, I'm ale to access the controller to read out if the textfield is empty or not.

Now the problem is, when I put the textfield in a seperate class I don't manage to find a way to access that controller from my main class.

I struggle a lot with passing data to and from within Dart, so hopefully this will brighten my mind.

Works when in same class

I'm using the image::imageops::colorops package to processs some images. I'd like to perform a sequence of colorops on a single image, what's the most efficient way to do this? Wouldn't I have to convert the ImageBuffer that the colors return into a GenericImageView if I wanted to use that processes image in the next colorop? That seems inefficient, wouldn't it be better to just pass the ImageBuffer that the colorop returns into the next colorop?

I am trying to add custom html on each state of america as shown in map example out put would be something like this site "https://covidactnow.org/?s=1311324" and i am trying this as follow

I'm trying to do some labs we were given to complete in Matlab for a video analysis module in python since I have already completed them in Matlab and I'm having an issue with brightening an image. I have got the image to read into a Numpy array with no problem but when I use the following code to try to brighten it then show it:

I have a image that is taken with uneven lighting.. there is a Light obove and one below the camera, so as a result, the image is properly lit in the center (top to bottom) but quite dark left and right.

Is there a way to apply a brightening filter with a gradient? so the more it nears the outer edge, the brighter it gets?

Solved with the answer from Mannari this way: