embree | Embree ray tracing kernels repository

by embree C++ Version: v4.1.0 License: Apache-2.0

X-Ray Key Features Code Snippets Community Discussions(7)Vulnerabilities Install Support

kandi X-RAY | embree Summary

embree is a C++ library typically used in Big Data applications. embree has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Intel Embree is a collection of high-performance ray tracing kernels, developed at Intel. The target users of Intel Embree are graphics application engineers who want to improve the performance of their photo-realistic rendering application by leveraging Embree’s performance-optimized ray tracing kernels. The kernels are optimized for the latest Intel processors with support for SSE, AVX, AVX2, and AVX-512 instructions. Intel Embree supports runtime code selection to choose the traversal and build algorithms that best matches the instruction set of your CPU. We recommend using Intel Embree through its API to get the highest benefit from future improvements. Intel Embree is released as Open Source under the [Apache 2.0 license] Intel Embree supports applications written with the Intel SPMD Program Compiler (ISPC, ) by also providing an ISPC interface to the core ray tracing algorithms. This makes it possible to write a renderer in ISPC that automatically vectorizes and leverages SSE, AVX, AVX2, and AVX-512 instructions. ISPC also supports runtime code selection, thus ISPC will select the best code path for your application. Intel Embree contains algorithms optimized for incoherent workloads (e.g. Monte Carlo ray tracing algorithms) and coherent workloads (e.g. primary visibility and hard shadow rays). The single-ray traversal kernels of Intel Embree provide high performance for incoherent workloads and are very easy to integrate into existing rendering applications. Using the stream kernels, even higher performance for incoherent rays is possible, but integration might require significant code changes to the application to use the stream paradigm. In general for coherent workloads, the stream mode with coherent flag set gives the best performance. Intel Embree also supports dynamic scenes by implementing high-performance two-level spatial index structure construction algorithms. In addition to the ray tracing kernels, Intel Embree provides some [Embree Tutorials] to demonstrate how to use the [Embree API].

Support

Quality

Security

License

Reuse

Support

embree has a medium active ecosystem.

It has 2024 star(s) with 358 fork(s). There are 125 watchers for this library.

There were 1 major release(s) in the last 12 months.

There are 42 open issues and 311 have been closed. On average issues are closed in 19 days. There are 11 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of embree is v4.1.0

Quality

embree has 0 bugs and 0 code smells.

Security

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

embree code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

embree 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.

Reuse

embree releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

It has 5560 lines of code, 63 functions and 55 files.

It has high code complexity. Code complexity directly impacts maintainability of the code.

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embree Key Features

No Key Features are available at this moment for embree.

embree Examples and Code Snippets

No Code Snippets are available at this moment for embree.

Community Discussions

Trending Discussions on embree

Embree: stream mode - how does gather and scatter work and what are pid and tid?

cmake equivalent for MakeFile

Build VTK with Python Bindings and CUDA, TBB, & MPI on Windows

CMake Build Help for `pyembree`

Use "extern __declspec(dllimport)" in Cython

How to convert a matrix saved as a struct to matrix

Unity VM crash (looks like acceleration issue)

QUESTION

Embree: stream mode - how does gather and scatter work and what are pid and tid?

Asked 2021-Dec-14 at 22:22

I'm trying to upgrade my application from single ray intersection to stream intersection.

What I don't quite understand is how it's possible that the gather and scatter functions shown in the tutorials are even working

The example defines a custom extended ray struct Ray2

...

ANSWER

Answered 2021-Dec-14 at 22:22

Having not written this example myself it's hard to guess what the original intention of it was, but I think the clue lies in exactly your observation that for rid and pid calculations, the division/modulo by '1' are meaningless.

So, if rid eventially always ends up as being '0' (because every value mod 1 will be 0 :-/), then uptr[rid] = ... is equivalent to *uptr = ..., which is in fact correct since you yourself pointed out that uptr always points to a valid transparency.

Now as to why the code does this confusing pid/rid thing? If I had to guess from the naming of "Ray2" I would assume that a different version of this sample maybe used two rays and two transparencies in that ray2 struct, and then used the rid/pid thing to always select the right one of the pair.

Still, as to the original question of "why does this work at all" : rid always evaluates to 0, so it does always write right into the transparency value that uptr points to.

Source https://stackoverflow.com/questions/68628885

QUESTION

cmake equivalent for MakeFile

Asked 2021-Oct-22 at 08:08

I followed this answer to create a CMakeLists.txt for a simple Makefile

Makefile

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ANSWER

Answered 2021-Oct-22 at 08:08

Ok, so following your answer to my comments, the problem is that since you starts your include instruction by embree3 (which make sense to avoid names conflict), cmake should have as include directory the directory containing the embree3 installation, not the embree3 folder itself.

This is why include_directories(/usr/local/include) is working instead of include_directories(/usr/local/include/embree3).

Source https://stackoverflow.com/questions/69672020

QUESTION

Build VTK with Python Bindings and CUDA, TBB, & MPI on Windows

Asked 2021-Aug-27 at 23:20

Problem

I cannot load VTK into python on Windows with support for CUDA, MPI, and TBB. Volume rendering is unreasonably slow for production with the default PyPI distribution (hours or more) and I need to leverage my hardware to speed up computations.

I have successfully built VTK 9.3.0 for Python 3.8.10-x64 with CMake and Visual Studio and have bin, lib, include, and share folders and have added these to PATH, but Python does not see vtk:

...

ANSWER

Answered 2021-Aug-26 at 23:20

Update: 26-AUG-2021 (Continued...)

NOTE: This is NOT an answer.

Pretty much doing the exact same thing, but in vtk.py instead, plus including all other system dependencies, using os.add_dll_directory() does not work:

Source https://stackoverflow.com/questions/68929181

QUESTION

CMake Build Help for `pyembree`

Asked 2021-Aug-01 at 17:24

I am looking for help building pyembree from source with CMake for Windows. Further details for the history of this question are listed here on GitHub. Windows support for pyembree on conda-forge was just removed, so any help that can be provided would be much appreciated!

Installation Instructions System

Tested on:

OS: Windows 10 x64 Professional, Build 1909 Python: 3.8.10

Steps

Install Microsoft Visual C++ 14.X and Windows 10 SDK. These are required for building cython code.

(NOTE: The version of Microsoft Visual Studio is not the same as the version of Microsoft Visual C++. Visual Studio 2015, 2017, and 2019 all have MSVCv14X build tools. At the time of this writing, installing the Visual Studio 2019 Build Tools with

MSVCv142 - VS 2019 C++ x64/x86 build tools and Windows 10 SDK (10.0.18362.0)

components will suffice (select the Desktop development with C++ Workload if installing Visual Studio 2019).

Install vcpkg in C:\\vcpkg and add the path to your System Environment Variables:

...

ANSWER

Answered 2021-Aug-01 at 17:24

CMake is actually not required. For complete instructions, please see my solution on Install pyembree on Windows without Conda #468.

Source https://stackoverflow.com/questions/68578252

QUESTION

Use "extern __declspec(dllimport)" in Cython

Asked 2021-Aug-01 at 17:20

Can I use extern __declspec(dllimport) in Cython? I am trying to wrap embree in Windows, but am not sure I can dynamically link in Cython.

I read this SO post which is great for changing C/C++ and header files directly, but I'm not sure how to implement this in a .pxd file.

For example, the Embree 2.17.7 x64 header rtcore.h defines RTCORE_API as

...

ANSWER

Answered 2021-Aug-01 at 17:20

The code functions properly once I literally hand-copy and paste over the DLLs into the generated .egg folder in my .venv\Lib\site-packages folder:

Source https://stackoverflow.com/questions/68594876

QUESTION

How to convert a matrix saved as a struct to matrix

Asked 2021-Apr-28 at 14:43

I downloaded a Matrix from https://sparse.tamu.edu/Embree/ifiss_mat, after loading this file i noticed that the matrix is stored as a struct containing 3 arrays of row indices, column indices and data. In this particular case represented as a struct containing Problem.A.ir, Problem.A.jc, Problem.A.data.

I am only used to having the matrix readily available as Problem.A, is there a way to convert from this struct to a 'normal' matrix?

...

ANSWER

Answered 2021-Apr-28 at 14:43

Having looked at the data and the description in the link you gave, it appears to me that this particular dataset follows the following pattern:

data are the values at the nonzero locations
ir are row indices IN ZERO-BASED FORM, corresponding to nonzero locations (same size as data)
jc is a helper vector telling you IN ZERO-BASED FORM when one column of row-indices stops and the next one starts in the ir vector

So, e.g. the first 20 entries in ir are:

Source https://stackoverflow.com/questions/67297942

QUESTION

Unity VM crash (looks like acceleration issue)

Asked 2021-Jan-20 at 11:17

There is a problem with run Unity project on Hyper-V virtual machine. To make a long story short, my Unity project is working on my PC, but doesn't work on a VM. I described this in detail here:

https://stackoverflow.com/q/65550732/5709159.

I found a crash log where Unity wrote everything. Because there is a restriction on number of chars that I can post on stack overflow I uploaded the full file here: https://drive.google.com/file/d/1xAtTUytNGH7WFSSIr8WGotCDrvQKW9f-/view, and here I just posted the last part of this file:

...

ANSWER

Answered 2021-Jan-13 at 06:17

The execution fails when it tries to enable or access a dedicated graphics card/driver:

Source https://stackoverflow.com/questions/65560295

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

Vulnerabilities

No vulnerabilities reported

Install embree

You can download it from GitHub.

Support

Embree supports Windows (32-bit and 64-bit), Linux (64-bit), and macOS (64-bit) both x86 and Apple M1 based. The code compiles with the Intel® Compiler, GCC, Clang, and the Microsoft Compiler. Using the Intel® Compiler improves performance by approximately 10%. Performance also varies across different operating systems, with Linux typically performing best as it supports transparently transitioning to 2MB pages. Embree is optimized for Intel CPUs supporting SSE, AVX, AVX2, and AVX-512 instructions. Embree requires at least an x86 CPU with support for SSE2 or an Apple M1 CPU. Embree Support and Contact.

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