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Originally introduced as an extension to OpenGL 1.4, GLSL was formally included into the OpenGL 2.0 core in 2004 by the OpenGL ARB. It was the first major revision to OpenGL since the creation of OpenGL 1.0 in 1992. Some benefits of using GLSL are: Cross-platform compatibility on multiple operating systems, including Linux, macOS and Windows.
The Blinn–Phong reflection model, also called the modified Phong reflection model, is a modification developed by Jim Blinn to the Phong reflection model. [1]Blinn–Phong is a shading model used in OpenGL and Direct3D's fixed-function pipeline (before Direct3D 10 and OpenGL 3.1), and is carried out on each vertex as it passes down the graphics pipeline; pixel values between vertices are ...
A vertex buffer object (VBO) is an OpenGL feature that provides methods for uploading vertex data (position, normal vector, color, etc.) to the video device for non-immediate-mode rendering. VBOs offer substantial performance gains over immediate mode rendering primarily because the data reside in video device memory rather than system memory ...
All major graphics card manufacturers have supported ARB assembly language for years, since the NVIDIA Geforce FX series, the AMD R300-based cards (Radeon 9500 series and higher), and the Intel GMA 900. [4] However, standard ARB assembly language is only at the level of Pixel Shader 2.0 and predates GLSL, so it has very few
It is a direct representation of the intermediate shader bytecode which is passed to the graphics driver for execution. The shader assembly language cannot be directly used to program unified Shader Model 4.0, 4.1, 5.0, and 5.1, although it retains its function as a representation of the intermediate bytecode for debug purposes. [6]
The unified shader model uses the same hardware resources for both vertex and fragment processing. In the field of 3D computer graphics, the unified shader model (known in Direct3D 10 as "Shader Model 4.0") refers to a form of shader hardware in a graphical processing unit (GPU) where all of the shader stages in the rendering pipeline (geometry, vertex, pixel, etc.) have the same capabilities.
For example: Create an FBO and bind it. Attach the color buffer (either as a RenderBuffer or a texture) to the FBO. Attach the depth buffer (either as a RenderBuffer or a texture) to the FBO. Bind the native window FrameBuffer (id=0) Render the texture to screen with a pixel shader, dependent on both the Color information and depth information.
A simple tessellation pipeline rendering a smooth sphere from a crude cubic vertex set using a subdivision method. In computer graphics, tessellation is the dividing of datasets of polygons (sometimes called vertex sets) presenting objects in a scene into suitable structures for rendering.