1 Introduction
i3D is an open XML 3D file format.The purpose of i3D is to interchange scene graph based 3D data between applications and platforms.
A vaild i3D file can have five fundamental parts: Textures, Shaders, Shapesn, Scene graph and Animation.
Dependent on application each part can be omitted.
1.1 Features
- Scenegraph hierarchy with
- TransformGroups: translation, rotation, scale and visibility
- Lights: type, color and intensity
- Cameras: field of view, near and far clipping plane
- Shapes: meshes and nurbs curves (supports geometry instancing)
- Animation
- Character sets
- Clips
- Keyframes: translation, rotation, scale and visibility
- Morph Targets
- Meshes
- Vertices
- Normals
- Vertex colors
- Skin weights
- Texture coordinates (including multiple uv sets)
- Faces
- Shader
- Multitexture (layered textures)
- Bumpmap/Normalmap
- Solid color
2 Example .i3d file
|
<?xml version="1.0" encoding="iso-8859-1"?>
<i3D name="myScene" version="1.2" xsi:noNamespaceSchemaLocation="http://i3d.giants.ch/schema/i3d-1.2.xsd"> <Textures> <Texture name="myTexture1" filename="myTexture1.png"/> </Textures> <Shaders> <Shader name="myShader_001" type="Blinn"> <Texture name="myTexture1" blend="None"/> </Shader> </Shaders> <Shapes> <IndexedFaceSet name="myPolyObject"> <Vertices> <v c="0.0 3.75 4.28"/> <v c="2.0 10.25 9.28"/> <v c="-4.382 2.75 9.99"/> </Vertices> <Faces shaderlist="myShader_001"> <f vi="0 1 2" ct="0"/> <f vi="1 2 0" ct="0"/> </Faces> </IndexedFaceSet> </Shapes> <Scene> <TransformGroup name="myGroup1" translation="1.25 0 -9"> <Shape name="myPolyObject"/> <TransformGroup name="myGroup2" 1.0" translation="2.0 1.0 1.5" rotation="90 0 270"> <Shape name="myPolyObject"/> </TransformGroup> </TransformGroup> </Scene> </i3D> |
3 Overview
