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Java, or other ), only code for programming GPU is in Cg.The Cg compiler outputs DirectX or OpenGL shader programs.The standard Cg library
2.GPU was needed, so Cg was created to overcome these problems and make shader development easier.Cg code is portable to a wide range of hardware and platforms, unlike assembly code, which usually depends on hardware and the platforms it's written for.The Cg compiler can optimize code and do lower level tasks automatically, which are hard to do and error prone in assembly.Cg also features vector and matrix data types that are based on the basic data types, such as float3 and float4x4.Such data types are quite common when dealing with 3D graphics programming.Cg also has struct and array data types, which work in a similar way to their C equivalents.It also has a similar way of defining functions.The standard Cg library
As in C, Cg features a set of functions for common tasks in GPU programming.The Cg runtime library
Cg programs are merely vertex and pixel shaders, and they need supporting programs that handle the rest of the rendering process.Cg can be used with two APIs: OpenGL or DirectX.Each has its own set of Cg functions to communicate with the Cg program, like setting the current Cg shader, passing parameters, and such tasks.Shaders can be compiled to suit different graphics hardware platforms (according to profiles).By creating a pixel shader for each of these profiles a supporting program enlarges the number of supported hardware platforms without sacrificing picture quality on powerful systems.This page was last modified 16:48, 15 January 2008.Java, or other ), only code for programming GPU is in Cg.The Cg compiler outputs DirectX or OpenGL shader programs.Background
As a result of technical advancements in graphics cards, some areas of 3D graphics programming have become quite complex.To simplify the process, new features were added to graphics cards, including the ability to modify their rendering pipelines using vertex and pixel shaders.In the beginning, vertex and pixel shaders were programmed at a very low level with only the assembly language of the graphics processing unit.GPU was needed, so Cg was created to overcome these problems and make shader development easier.Some of the benefits of using Cg over assembly are:
High level code is easier to learn, program, read, and understand than assembly code.Cg code is portable to a wide range of hardware and platforms, unlike assembly code, which usually depends on hardware and the platforms it's written for.Such data types are quite common when dealing with 3D graphics programming.Operators
Cg supports a wide range of operators, including the common arithmetic operators from C, the equivalent arithmetic operators for vector and matrix data types, and the common logical operators.It also has a similar way of defining functions.The standard Cg library
As in C, Cg features a set of functions for common tasks in GPU programming.Each has its own set of Cg functions to communicate with the Cg program, like setting the current Cg shader, passing parameters, and such tasks.To avoid exposing the source code of the shader, and still maintain some of the hardware specific optimizations, the concept of profiles was developed.Shaders can be compiled to suit different graphics hardware platforms (according to profiles).For instance there might be a profile for a graphics card that supports complex pixel shaders, and another profile for one that supports only minimal pixel shaders.Steven Glanville, Kurt Akeley, Mark J.Language, Proceedings of SIGGRAPH 2003.Kilgard, Cg in Two Pages, 2003.GPUs from NVIDIA and other vendors.XSI), runtime libraries, comprehensive documentation, and hundreds of shader examples.The Cg Toolkit provides a compiler for the Cg 2.Supporting over 25 different OpenGL and DirectX profile targets, Cg 2.Language Specification, runtime APIs, Cg standard library, CgFX states, and the Cg profiles.We hope that you will enjoy the exciting world of Cg programming.Support for Apple's new "Leopard" release of Mac OS X 10.Improved compiler code generation
Runtime performance improvements
Compatibility with Cg 1.GZ)Previous Versions Cg Toolkit 2.Are you sure you want to log out?Time QuotesGet QuotesFinance SearchCarolina Group (CG)At 4:01PM ET: 82.LOEWS CAROLINA GRP (NYSE:CG) After Hours: 82.Tobacco Stocks Have the Right Formulaat RealMoney by TheStreet.Toast the New Year With These 'Boozy' Fundsat TheStreet.More Financial Blogs for CG...Carolina Group, through its subsidiary, Lorillard, Inc.Quotes delayed, except where indicated otherwise.Historical chart data and daily updates provided by Commodity Systems, Inc.Analyst estimates data provided by Thomson Financial Network.ThomsonFN shall not be liable for any actions taken in reliance thereon.CENTERRA GOLD INC COM NPV (Toronto:CG.Data
Quotes delayed, except where indicated otherwise.CIBC World MarketsCenterra Gold Inc.No business summary available for CG.See also delay times for other exchanges.Fundamental company data provided by Capital IQ.Financials data provided by Edgar Online.Historical chart data and daily updates provided by Commodity Systems, Inc.International historical chart data and daily updates provided by Hemscott Americas.Fund summary, fund performance and Morningstar Index data provided by Morningstar.Analyst estimates data provided by Thomson Financial Network.The Cg Language Specification is published and open in the sense that other vendors may implement products based on it.Vendor implementations of Cg Compilers are typically proprietary and owned by their creators.NVIDIA has developed and owns the NVIDIA Cg Compiler, and other vendors are expected and encouraged to develop their own Cg Compiler products.No, Cg operates as a layer above OpenGL.No, Cg is a shading language.GPU how to shade pixels.What is NVIDIA's involvement in the future of OpenGL?NVIDIA proposed and led the development of OpenGL 1.Platforms
What platforms does the NVIDIA Cg Compiler support?How will Cg support future GPUs?NVIDIA Cg Toolkit
What is NVIDIA providing to developers?Will there be other versions of the tookit?Will the NVIDIA Cg Compiler perform any platform specific optimizations?Start by learning about the technology.XSI and Right Hemisphere's Deep Exploration are embedding Cg into the digital artist's workflow.
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