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, Nebula2，Genesis3d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

·   对 BSP 的特性支持比较贫乏

对 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

来自:http://www.cnblogs.com/cyberchen-net