OpenGL 與 Direct3D，那個較好？

「Direct3D 」is part of Microsoft's DirectX API. Direct3D is only available for Microsoft's various Windows operating systems (Windows 95 and above) and is the base for the graphics API on the Xbox and Xbox 360 console systems. Direct3D is used to render three dimensional graphics in applications where performance is important, such as games. Direct3D also allows applications to run fullscreen instead of embedded in a window, though they can still run in a window if programmed for that feature. Direct3D uses hardware acceleration if it is available on the graphic board. The entire or part of the 3D rendering pipeline can be accelerated in hardware. Direct3D exposes the advanced graphics capabilities of 3D graphics hardware, including z-buffering, anti-aliasing, alpha blending, mipmapping, atmospheric effects, and perspective-correct texture mapping. Integration with other DirectX technologies enables Direct3D to deliver such features as video mapping, hardware 3D rendering in 2D overlay planes, and even sprites, providing the use of 2D and 3D graphics in interactive media titles.

Direct3D is a 3D API. That is, it contains many commands for 3D rendering, however since version 8 Direct3D has superseded the old DirectDraw framework and also taken reponsibility for the rendering of 2D graphics.[1] Microsoft strives to continually update Direct3D to support the latest technology available on 3D graphics cards. Direct3D offers full vertex software emulation but no pixel software emulation for features not available in hardware. For example, if software programmed using Direct3D requires pixel shaders and the video card on the user's computer does not support that feature, Direct3D will not emulate it. The API does define a Reference Rasterizer (or REF device), which emulates a generic graphics card, although it's too slow to be used in any application to emulate pixel shaders and is usually ignored.

Direct3D's main competitor is OpenGL. There are numerous features and issues that proponents for either API disagree over, see comparison of Direct3D and OpenGL for a summary.

「OpenGL 」(Open Graphics Library) is a standard specification defining a cross-language cross-platform API for writing applications that produce 2D and 3D computer graphics. The interface consists of over 250 different function calls which can be used to draw complex three-dimensional scenes from simple primitives. OpenGL was developed by Silicon Graphics Inc. (SGI) in 1992[1] and is popular in the video game industry where it competes with Direct3D on Microsoft Windows platforms (see Direct3D vs. OpenGL). OpenGL is widely used in CAD, virtual reality, scientific visualization, information visualization, flight simulation and video game development.


i fell Direct3D is good di

唔知你問咩比較好，so答你可能唔match

如果你講用，而家多數人會用Direct3D，因為version新，support多game同software