prism | Ray-traced cover of Pink Floyd 's Dark Side of the Moon

 by   lkesteloot C Version: Current License: Apache-2.0

kandi X-RAY | prism Summary

kandi X-RAY | prism Summary

prism is a C library. prism has no bugs, it has a Permissive License and it has low support. However prism has 1 vulnerabilities. You can download it from GitHub.

This is a forward ray-tracer to make an image like the cover of the Pink Floyd album Dark Side of the Moon:. Light comes from a point source far off to the left of the image. It goes through a tiny vertical slit just to the left of the image. ("Vertical" means "toward the viewer", as if you're looking down on a table.) Each ray has a random wavelength in the visible spectrum. If the ray hits the table, it leaves a spot of color according to the wavelength-to-RGB code from John D. Cook. If it hits the prism, it chooses whether to reflect or refract, according to Schlick's approximation. The refraction angle is calculated from Cauchy's equation. The material is Borosilicate glass BK7, except that the C term is multiplied by 10 to get a nice-sized rainbow. The above alone would leave the prism itself invisible, so 10% of the time the ray is sent straight down from the viewer, to illuminate the inside of the prism. The original album cover didn't include reflections, but I liked them and left them in. There's no camera model here, the color on the paper is used directly.
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            kandi-support Support

              prism has a low active ecosystem.
              It has 28 star(s) with 0 fork(s). There are 2 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              prism has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of prism is current.

            kandi-Quality Quality

              prism has 0 bugs and 0 code smells.

            kandi-Security Security

              prism has 1 vulnerability issues reported (0 critical, 1 high, 0 medium, 0 low).
              prism code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              prism is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              prism releases are not available. You will need to build from source code and install.
              Installation instructions, examples and code snippets are available.

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            prism Key Features

            No Key Features are available at this moment for prism.

            prism Examples and Code Snippets

            No Code Snippets are available at this moment for prism.

            Community Discussions

            QUESTION

            Is there an `id` of `prism' id Just`?
            Asked 2022-Mar-19 at 18:11

            I have a function called:

            ...

            ANSWER

            Answered 2022-Mar-19 at 18:11

            I'm not familiar with the idioms for that package, but I'd be tempted to use castOptic equality to turn the identity Iso into a Prism. That seems to get the idea across pretty well. However, I would expect that in most contexts you wouldn't actually need to convert it to a Prism; you can presumably use polymorphic functions (like preview and review) that will accept an Iso as well as a Prism.

            In your case, I suspect the right approach would be to write something like

            Source https://stackoverflow.com/questions/71540457

            QUESTION

            Unable to coerce during `DerivingVia` when using optics types like `Prism'`
            Asked 2022-Mar-16 at 02:03

            I'm unable to automatically derive instances using DerivingVia on any type that uses types from optics-core like Prism'; the error I get from compiler is:

            ...

            ANSWER

            Answered 2022-Mar-15 at 23:46

            Generally speaking, profunctor optics (such as those used in the lens and optics packages) aren't directly coercible. Roughly speaking, the internal representation of a prism is something like:

            Source https://stackoverflow.com/questions/71489589

            QUESTION

            What is a `Prism' s a` but with a context `ctx`?
            Asked 2022-Mar-15 at 21:44

            A type Prism' s a = Prism s s a a (hackage) can be thought of as a relation between some structure s and its member a, such that you can always produce the structure from the member (a -> s), but can only optionally retrieve the member from the structure (s -> Maybe a).

            This model is helpful in relating a sum type to one of its constructors ... as well as (more relevant here) in route encoding and decoding. If s is the encoded route URL, and a is the route type, then we have a -> s representing the encoding function (always succeeds), and s -> Maybe a representing the decoding function (can fail).

            Now, on to these pairs of functions, I want to add a "context" argument that is to be used in the encoding and decoding process (imagine that the decoding process needs to "look up" some database before successfully producing a relevant route). Basically:

            ...

            ANSWER

            Answered 2022-Mar-15 at 15:18

            I'm with @HTNW. You should just be able to define:

            Source https://stackoverflow.com/questions/71475510

            QUESTION

            How to force gpu usage with JavaFX?
            Asked 2022-Mar-09 at 05:23

            I use JavaFX with Java 8 and i set this properties before launching my app
            System.setProperty("prism.forceGPU","true");
            System.setProperty("prism.order","d3d,sw");
            The verbose mode for prism gives me this :

            ...

            ANSWER

            Answered 2022-Mar-09 at 05:23

            For those who are trying to solve a similar issue, it might be coming from the java.exe executable not using the gpu you want as a default device, you can change that in Windows' settings.

            Source https://stackoverflow.com/questions/71365052

            QUESTION

            How to use lens to access a record field behind a sum type
            Asked 2022-Mar-01 at 21:47

            I am trying to access a nested record using lenses and prisms in Haskell:

            ...

            ANSWER

            Answered 2022-Mar-01 at 21:09

            Updated: As per comments, I've fixed some errors and added a few asides in [[double square brackets]].

            Here's how/why your first mMistake works...

            A prism is an optic that focus on a "part" that may or may not be present in the "whole". [[Technically, it focuses on the sort of part that can be used to reconstruct an entire whole, so it really pertains to a whole that can come in several alternative forms (as in the case of a sum type), with the "part" being one of those alternative forms. However, if you're only using a prism for viewing and not setting, this added functionality isn't too important.]]

            In your example, both _StateRun and _Just are prisms. The _Just prism focuses on the a part of a Maybe a whole. Such an a may or may not be present. If the Maybe a value is Just x for some x :: a, the part a is present and has value x, and that's what _Just focuses on. If the Maybe a value is Nothing, then the part a is not present, and _Just doesn't focus on anything.

            It's somewhat similar for your prism _StateRun. If the whole StateStep is a StateRun x y value, then _StateRun focuses on that "part", represented as a tuple of the fields of the StateRun constructor, namely (x, y) :: (Int, Maybe Text). On the other hand, if the whole StateStep is a StatePause, that part isn't present, and the prism doesn't focus on anything.

            When you compose prisms, like _StateRun and _Just, and lenses, like stStep and _2, you create a new optic that combines the composed series of focusing operations.

            [[As was pointed out in the comments, this new optic isn't a prism; it's "only" traversal. In fact, it's a specific kind of traversal, called an "affine traversal". A run-of-the-mill traversal can focus on zero or more parts, while an affine traversal focuses on exactly zero (part not present) or one (unique part present). The lens library doesn't make the distinction between affine traversals and other sorts of traversals, though. The reason the new optic is "only" an affine traversal instead of a prism relates to that earlier technical point. Once you add lenses, you remove your ability to reconstruct the entire "whole" from a single "part". Again, if you're only using the optics for viewing, not setting, it won't really matter.]]

            Anyway, consider the optic (affine traversal):

            Source https://stackoverflow.com/questions/71301462

            QUESTION

            Lenses, the State monad, and Maps with known keys
            Asked 2022-Feb-11 at 18:14

            here is a puzzle that I keep on bumping into and that, I believe, no previous SO question has been addressing: How can I best use the lens library to set or get values within a State monad managing a nested data structure that involves Maps when I know for a fact that certain keys are present in the maps involved?

            Here is the puzzle ...

            ANSWER

            Answered 2022-Feb-09 at 11:43

            If you are sure that the key is present then you can use fromJust to turn the Maybe User into a User:

            Source https://stackoverflow.com/questions/71046129

            QUESTION

            Connect stack bar charts with multiple groups with lines or segments using ggplot 2
            Asked 2022-Jan-25 at 12:12

            I am conducting a study of a number of patients with a disease, and using an ordinal scale assessment of functional status at 3 different time points. I want to connect multiple groups in stacked bar charts across these time points.

            I looked at these topics and havent gotten it to work using these suggestions:

            How to position lines at the edges of stacked bar charts

            Is there an efficient way to draw lines between different elements in a stacked bar plot using ggplot2?

            Draw lines between different elements in a stacked bar plot

            Please see the graphical representation of how I ultimately want this figure to look from R (generated in PRISM) of the frequencies of each of these 6 ordinal values across the three time points (top group has no patients with ordinal score 3,5,6):

            Intended FIGURE using PRISM

            Data:

            ...

            ANSWER

            Answered 2022-Jan-24 at 17:15

            I don't think there is an easy way of doing this, you'd have to (semi)-manually add these lines yourself. What I'm proposing below comes from this answer, but applied to your case. In essence, it exploits the fact that geom_area() is also stackable like the bar chart is. The downside is that you'll manually have to punch in coordinates for the positions where bars start and end, and you have to do it for each pair of stacked bars.

            Source https://stackoverflow.com/questions/70837348

            QUESTION

            Can I use Prism for WinUI 3 apps?
            Asked 2022-Jan-15 at 16:46

            I'd like to use Prism in a WinUI 3 app, and I saw the Prism v8.1 release.

            Additionally Prism 8.1 offers a new Prism.Uno.WInUI platform target for those wishing to build either native WinUI3, or Cross Platform WinUI 3 apps with Uno Platform.

            I'm confused about Uno. I'm not using Uno, can I still use Prism in a WinUI 3 app without using Uno?

            If yes, which packages do I need to install and in which projects? (I'd like to use DryIoc)

            I guess Prism.DryIoc.Uno.WinUI must be added to the WinUI 3 app project.

            But what about the other packages for using Prism?

            ...

            ANSWER

            Answered 2022-Jan-10 at 12:59

            If you specifically want to use 'Dryloc', you could try to use one of these Nuget packages:

            • Prism.Container.Extensions
            • Prism.DryIoc.Extensions

            They should both be of general use and not target a specific UI technology.

            If you install 'Prism.DryIoc.Extensions' using the Nuget-Package manager, dependent packages should be installed automatically.

            See Github - Prism.Container.Extensions


            Note there is also a package 'Prism.Core' that does not target a specific UI framework either. If contains features like an event aggregator.

            Source https://stackoverflow.com/questions/70223599

            QUESTION

            JavaFX 11 Error intializing QuantumRenderer when running custom JRE image on Windows
            Asked 2021-Dec-03 at 12:53

            I have built my app with JavaFX 11 and now I need to distribute it. I have chosen to distribute it in two ways: cross-platform fat-jar (I know, I know, it is discouraged, but that is not the point) and platform specific image created with jlink.

            I am building on Linux Mint 20.1. I am using Maven and creating runtime image with javafx-maven-plugin. I have JDKs for both platforms on my Linux machine and pointed to the corresponding jmods folder in pom.xml.

            The built fat-jar works on both Linux and Windows where both have installed the latest Java SDK (11.0.12).

            The image for Linux also works without problems.

            However, the image for Windows does not run and the output of -Dprism.verbose=true is this:

            ...

            ANSWER

            Answered 2021-Oct-17 at 17:16

            java.lang.UnsatisfiedLinkError: no prism_sw in java.library.path

            Means you're definitely missing some dlls from your library path, although this could only be a part of the problem.

            When you download javafx sdk for windows from this link, you get a zip with the following structure:

            The bin folder contains all the natives you need to run JavaFx (on windows, or the platform you downloaded the sdk for)

            Note that you don't always need all the natives, jfxwebkit.dll for example is only needed when you work with javafx-web.

            You need to extract them somewhere and add the folder you extracted them in to the library path when you run the java program

            Source https://stackoverflow.com/questions/69597596

            QUESTION

            stuck on javafx.graphics does not export com.sun.javafx.sg.prism to unnamed module
            Asked 2021-Oct-31 at 01:43

            I've been stuck on this error now for a few days. I've googled the heck out it and tried at least a dozen different proposed solutions in various forms...

            My project runs fine, UNTIL I attempt to use a specific library called MonacoFX, which, according to the GitHub page, was developed in Java 13 (I'm using Java 16.0.1 for this project). The documentation for the library is straight forward, you instantiate the library like you do with most libraries, then you simply use it. However, as soon as I attempt to instantiate it, I get this error at runtime:

            ...

            ANSWER

            Answered 2021-Oct-31 at 01:43

            How to debug dependencies

            Include the maven dependency plugin in your project.

            Source https://stackoverflow.com/questions/69779045

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install prism

            Build the renderer using CMake:. It compiles on MacOS and Linux.

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            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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            gh repo clone lkesteloot/prism

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            git@github.com:lkesteloot/prism.git

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