典型开源3D引擎分类比较

    技术2022-05-11  15

    常见的3D引擎有:Unreal,Quake,Lithtech,OGRE,Nebula,Irrlicht,Truevision3D...等,其中开源免费的有:orge,irrlicht,fly3d, NeoEngine, revolution3d, Nebula2Genesis3d等。OGRE 在免费、开源的引擎中评价最高,一个原因是作为一个图形渲染引擎,它支持的图形特性最多,所以渲染质量也不错;另一个原因是设计模式的清晰;另外,速度也不错。OGRE 将专注于向一个纯粹的、然而富于协作和扩展性的图形引擎发展,这得益于它的庞大的社群支持,使得很多事情可以通过外挂一些更专业的引擎来实现,物理引擎使用 ODE  Tokamak  NovodeX ,网络引擎使用 openTNL  RakNet  eNet ,声音引擎使用 FMod  OpenAL ,以及界面引擎使用 CEGUI 

     

     

    Standard

    OGRE

    IrrLicht

    Truevision3D

    General

    Type

    Only rendering engine

     

    Game engine

    Include TV3DEngine,TV3DMedia,TV3DNet……

    Languages

    Written in pure C++, totally object orientated.

    Written in pure C++, totally object orientated.

    Written in C++ and VB6 with DirectX8.1

    License

    LGPL

    zlib/libpng License(totally free)

    ·   Free TV3DSDK

    ·   Registered Developer License

    ·   group or site licenses

    Develop platforms

    ·   C++

    ·   .NET

    ·   C++

    ·   .NET language binding

    VB/VC++/DELPHI/

    C#/vb.net

    Platforms

    Windows

    ü         Support

    ü         Support

    ü         Support

    Linux

     

    ü         Support

    ü         Support

     

    MacOS

    ü         Support

    ü         Support

     

    3D API

    Direct3D

    ü         Support

    ü         Support

    ü         Support

    OpenGL

    ü         Support

    ü         Support

     

    Other

     

    ·   The Irrlicht Engine software renderer.

    ·   The Apfelbaum Software Renderer

     

    Architecture

    Extensibility

    ·   Extensible example framework

    ·   Flexible plugin architecture allows engine to be extended without recompilation

    ·   Use some other professional engines to achieve other features

     

     

    Scripting

     

     

     

    Materials & Textures

    Materials

    ·   Powerful material declaration language

    ·   Multiple material

    ·   Material LOD

    ·   Multi-texture and multi-pass blending

    ·   Projective texturing

    ·   Textures can be provided and updated in real-time by plugins

    ·   Provide common built in materials based on fixed function pipeline or programmable pipeline

    ·   add new materials to Irrlicht at runtime, without the need of modifying/recompiling the engine

     

    Textures and Mapping

    自动产生MipMap

     

    自动调整纹理大小以满足硬件需求。

     

    支持可程序控制的纹理坐标生成和转换。

    ·   Bump mapping

    ·   Parallax mapping

    ·   Light maps

    ·   Sphere mapping

    DOT3 Bump mapping

     

    没有提供多层纹理和混合模式

    Shaders

    ·   Supports vertex and fragment programs, both written in assembler, and in Cg, DirectX9 HLSL, or GLSL

    ·   Support many commonly bound constant parameters like worldview matrices, light state information, object space eye position etc

    ·   Pixel and Vertex Shaders 1.1 to 3.0

    ·   ARB Fragment and Vertex Programs

    ·   HLSL

    ·   GLSL

    ·   Hardware Vertex Shaders

    ·   HLSL

    Scene Management

    General

    ·   Highly customizable, flexible scene management, not tied to any single scene type.

    ·   Hierarchical scene graph; nodes allow objects to be attached to each other and follow each others movements, articulated structures etc

    ·   Scene querying

    ·   Using a hierarchical scene graph, can mix indoor and outdoor scene seamless together

    ·   Extensible hierarchical scene management

     

     

    BSP Support

    BSP 场景的天空穹、粒子特效、高级材质属性,乃至 BSP 的空间分割规则都会被正确识别、自动实现

    ·    BSP 的特性支持比较贫乏

     BSP 的读取存在 BUG

    Other

     

     

     

    Special effects

    Particle System

     

    ·   easily extensible emitters, affectors and renderers

    ·   can be defined in text scripts for adjusting in real-time

    ·   particle pooling

    ·   Customizeable Particle systems for snow, smoke, fire, ...

    Atmospheric effects like fog, cloud, sky (box and sphere), stars.

    Light & Shadow

     

    当前支持三种阴影:调整纹理阴影,调整模版阴影,附加模板阴影。不支持软阴影

    Multiple shadow rendering techniques,

    ·   Dynamic lights

    ·   Dynamic shadows using the stencil buffer

    ·   Optimized dynamic stencil shadows

    ·   DirectX Hardware Lighting

    Other

    ·   Support for skyboxes, skyplanes and skydomes

    ·   Billboarding for sprite graphics

    ·   Transparent objects automatically managed

     

    ·   Realistic water surfaces

    ·   Billboards

    ·   Transparent objects

    ·   Skyboxes

    ·   Fog

    ·   Texture animation

    Billboard

    Character Animation

     

    ·   Skeletal animation

    ·   blending of multiple animations

    ·   variable bone weight skinning

    ·   hardware-accelerated skinning

     

    ·   Morph target animation:

    ·   Skeletal animation

    ·   Skeleton based, Key frame based, morph based animations

    ·   Animations that can be enhanced by bone attaching or custom bone rotations.

    Supported Formats

    textures file formats

    ·   PNG, JPEG, TGA, BMP or DDS

    ·   1D textures, volumetric textures, cubemaps and compressed textures (DXT/S3TC)

    ·   PSD,JPG,PNG,TGA,BMP,PCX 

     

     

    mesh file formats

    Milkshape3D, 3D Studio Max, Maya, Blender and Wings3D

    ·   3DS,OBJ,CSM,DAE,DMF,OCT,X,MS3D,MY3D,LMTS,BSP,MD2

    3DS, X, MDL, MD2, MD3

    Document

     

    Great number of users and well documented.

    well documented API with lots of examples and tutorials.

     

    Other

    GUI

     

     

     

    2D Drawing

     

     

     

    XML

    ü         Support

    XML Converter: convert efficient runtime binary formats to/from XML for interchange or editing

    ü        Support

    快速的XML分析器

     

    Web Site

     

    http://www.ogre3d.org

    http://irrlicht.sourceforge.net

    http://www.truevision3d.com

     

     

     

     

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