epsilon | Physically Based Spectral Renderer | Graphics library

 by   TomCrypto C++ Version: Current License: Non-SPDX

kandi X-RAY | epsilon Summary

kandi X-RAY | epsilon Summary

epsilon is a C++ library typically used in User Interface, Graphics applications. epsilon has no bugs, it has no vulnerabilities and it has low support. However epsilon has a Non-SPDX License. You can download it from GitHub.

. This is a small, and self-contained, raytracing renderer I’m working on. It was never designed to rival with existing high-profile renderers, as I developed it mostly for fun and as an exercise in software design, though I am releasing it, in the hope that someone will find it of some value. The εpsilon renderer is coded in C++11, and is powered by OpenCL.
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              epsilon has a low active ecosystem.
              It has 23 star(s) with 7 fork(s). There are 4 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              epsilon has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of epsilon is current.

            kandi-Quality Quality

              epsilon has no bugs reported.

            kandi-Security Security

              epsilon has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              epsilon has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              epsilon 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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            epsilon Key Features

            No Key Features are available at this moment for epsilon.

            epsilon Examples and Code Snippets

            No Code Snippets are available at this moment for epsilon.

            Community Discussions

            QUESTION

            Why comparing a small floating-point number with zero yields random result?
            Asked 2021-Jun-15 at 15:13

            I am aware that floating-point numbers are tricky. But today I encountered a case that I cannot explain (and cannot reproduce using a standalone C++ code).

            The code within a large project looks like this:

            ...

            ANSWER

            Answered 2021-Jun-15 at 09:57

            Barring the undefined behavior which can be easily be fixed, you're seeing the effect of denormal numbers. They're extremely slow (see Why does changing 0.1f to 0 slow down performance by 10x?) so in modern FPUs there are usually denormals-are-zero (DAZ) and flush-to-zero (FTZ) flags to control the denormal behavior. When DAZ is set the denormals will compare equal to zero which is what you observed

            Currently you'll need platform-specific code to disable it. Here's how it's done in x86:

            Source https://stackoverflow.com/questions/67982764

            QUESTION

            Equatiomatic: lmer model "subsript out of bounds"
            Asked 2021-Jun-14 at 20:36

            I am trying the equatiomatic package to plot my lmer model.

            ...

            ANSWER

            Answered 2021-Jun-14 at 20:36

            I'm the developer of that package. It should work with lme4::lmer() equations. The issue here is with dropping the intercept but having it vary randomly at higher levels. See this issue for more details.

            If you have suggestions for how you would expect the equation to render, I'm open to working out a fix. But for now, equatiomatic::extract_eq() assumes that whatever random effects you have also have corresponding fixed effects.

            Source https://stackoverflow.com/questions/67966270

            QUESTION

            Line intersection function
            Asked 2021-Jun-14 at 03:04

            I have a line line intersection function (infinite lines) of which both lines are defined by two points.

            It does not seem to find the correct intersection point but I don't know where I have gone wrong. I created the function following the math explanation on Wikipedia:

            https://en.m.wikipedia.org/wiki/Line%E2%80%93line_intersection#Given_two_points_on_each_line

            This is my attempt at making the function from the math:

            ...

            ANSWER

            Answered 2021-Jun-14 at 02:43

            QUESTION

            Modern practice to compare double/float for equality in modern C++
            Asked 2021-Jun-09 at 18:46
            if (std::abs(double1 - double2) < std::numeric_limits::epsilon())
              std::cout<<"Equal";
            else
              std::cout<<"Not equal";
            
            ...

            ANSWER

            Answered 2021-Jun-09 at 18:46

            Is this code with modern C++11/14/17/21 is still the way we should compare float and doubles, or now it's ok just to write if (double1 == double2) And compiler will handle the epsilon issue for us?

            Both approaches function the same in modern C++ as they did in early C++.

            Both approaches are also flawed.

            • Using == assumes that your code has accounted for any floating point rounding errors, and it's very rare/difficult for code to do that.

            • Comparing against epsilon assumes that a reasonable amount of rounding error will be less than the constant epsilon, and that is very likely a wrong assumption!

              • If your numbers have magnitude greater than 2.0, your epsilon trick will be no different from direct comparison, and have the same flaws. Regardless of whether you use < or <=.
              • If your numbers have the same sign and a magnitude smaller than epsilon, your epsilon trick will say they are always equal, even if one is hundreds of times larger than the other. They would both be equal to zero, too.

            A wise approach may be to avoid writing code that depends on whether floating point numbers are equal. Instead test if they are relatively close, by some factor.

            The code below will test whether two numbers are within about 0.01% of each other. Regardless of their scale.

            Source https://stackoverflow.com/questions/67842444

            QUESTION

            Is Increment Speed Affected By Clock Rate
            Asked 2021-Jun-09 at 11:37

            Consider the loop below. This is a simplified example of a problem I am trying to solve. I want to limit the number of times doSomething function is called in each second. Since the loop works very fast, I thought I could use a rate limiter. Let's assume that I have found an appropriate value by running it with different x numbers.

            ...

            ANSWER

            Answered 2021-Jun-06 at 20:31

            If I understand the issue proberly, you could use a std::chrono::steady_clock that you just add a second to every time a second has passed.

            Example:

            Source https://stackoverflow.com/questions/67863254

            QUESTION

            How do I properly sort the data for my d3 bubble map so that smaller bubbles show up on top of larger bubbles?
            Asked 2021-Jun-08 at 00:26

            I'm making a bubble map similar to this one: https://observablehq.com/@d3/bubble-map

            Everything is working except that my smaller bubbles are not always showing on top of the larger ones. I can't see why, as I've sorted the data before drawing the circles. Can anyone see what I'm doing wrong?

            Here is a plunker: https://plnkr.co/edit/JKWeQKkhN2TQwvNZ?open=lib%2Fscript.js

            Code is below. The other files are too large for stack overflow but can be accessed via the Plunker.

            ...

            ANSWER

            Answered 2021-Jun-08 at 00:26

            I would suggest you to split your data to a couple separate datasets grouped by size and create distinct group (g element) for each one. This will also fix issues with circles highlighting.

            I slightly updated your plunker to make it work as described (check the lines 91-167) https://plnkr.co/edit/rayo5IZQrBqfqBWR?open=lib%2Fscript.js&preview

            Also check the raise and lower methods. They might be a good replacement for your moveToFront and moveToBack methods. https://riptutorial.com/d3-js/example/18029/svg--the-drawing-order

            Source https://stackoverflow.com/questions/67879036

            QUESTION

            Drawing lines on top of bar chart using ggplot (Box and Whisker kind)
            Asked 2021-Jun-06 at 10:02

            I am trying to draw the following: Given a bar chart in ggplot similar to this one: a grouped bar chart, flipped over x axis.

            I would like to draw a line on top of each of the bars. The longitude of the line is defined in the dataframe df2. (think about it as some sort of standard deviation)

            The longitude of the line is defined, and it will be centered at the highest point of each bar. As you can see this is not similar to a boxplot, it is a line that will always remain constant and centered on top of each bar.

            So I was wondering if it was possible to do this with the code I am showing in the next Section. In excel it is quite fast to do this using what is called a Box and wisker plot. The final result should look like the following:

            This is the code I am currently using, hope someone can please help me out.

            ...

            ANSWER

            Answered 2021-May-19 at 17:03

            You probably want to use 'geom_errorbar' which will flip when 'coord_flip' is called as well.

            An example from my own data is here:

            Source https://stackoverflow.com/questions/67607530

            QUESTION

            How can I see the model as visualized?
            Asked 2021-Jun-04 at 12:46

            I am trying to do some sample code of GAN, here comes the generator.

            I want to see the visualized model but, this is not the model.

            Model.summary() is not the function of tensorflow but it is keras?? if so how can I see visualized model??

            ...

            ANSWER

            Answered 2021-Jun-03 at 10:47

            One possible solution (or an idea) is to wrap your tensorflow operation into the Lambda layer and use it to build the keras model. Something like

            Source https://stackoverflow.com/questions/67816912

            QUESTION

            Custom environment using TFagents
            Asked 2021-Jun-02 at 22:36

            I am trying to learn a custom environment using the TFAgents package. I am following the Hands-on-ML book (Code in colab see cell 129). My aim is to use DQN agent on a custom-written grid world environment.

            Grid-World environment:

            ...

            ANSWER

            Answered 2021-Jun-02 at 22:36

            You cannot use TensorSpec with PyEnvironment class objects, this is why your attempted solution does not work. A simple fix should be to use the original code

            Source https://stackoverflow.com/questions/65743558

            QUESTION

            extract one element/data frame from a list of lists
            Asked 2021-Jun-02 at 21:23

            I have a list of lists called cj1. Each list contains multiple data frames/elements. I want to extract the first element/data frame from each list in a separate list of data frames. The first rows in the first element of each list look like this

            ...

            ANSWER

            Answered 2021-Jun-02 at 21:23

            So after messing around, the answer seems to be very simple: `results1<-cj1["coefficients",]. This creates the list that I want. Akrun, if you read this, thank you for your support.

            Source https://stackoverflow.com/questions/67809811

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

            Vulnerabilities

            No vulnerabilities reported

            Install epsilon

            The following special build flags can be passed to alter some sections of code, either for testing or compatibility - simply override the makefile, as follows:.
            LOW_RES_TIMER: disables all high-resolution timers and replaces them with a low-resolution (seconds only), but portable timer. For Linux as Windows has guaranteed high-resolution timer support, but this flag should still take effect under Windows.

            Support

            LINUX: The code is essentially native to Linux, and will run with little to no changes. Verified under Linux Mint 14 x64 and Debian Testing x64. WINDOWS: The renderer is compatible with the latest MinGW distribution, and possibly MSVC. Verified under MinGW32 (GCC 4.7.2) / Windows 7 x86. It may be necessary to tweak the code a little bit if features are missing, but nothing too hard, at least for MinGW. We’re making it better, one #ifdef at a time. The code does compile under Visual Studio C 2010 with a fair bit of effort (C11 isn’t apparently fully supported) but nothing too hard. MAC: Status unknown - the renderer has never been tested under Mac OS X. If you want to help out with Mac support, drop me a line (contact details are on my Github page), all help is greatly welcome.
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            https://github.com/TomCrypto/epsilon.git

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            gh repo clone TomCrypto/epsilon

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            git@github.com:TomCrypto/epsilon.git

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