Blender Three.js Object Export

A Three.js Object Format 4.3 Exporter for Blender

This add-on will export one or more blender meshes as a single three.js object that can be imported with the existing THREE.ObjectLoader. The exported object will either be a THREE.Mesh, or a THREE.Object3D, with two or more THREE.Mesh children, depending on export options.

• Live Example

• Example JSON

Features

• Exports indexed THREE.BufferGeometry (position, normal, uv, uv2, color)

• Exports core Three.js Material types (Basic, Lambert, or Phong)

• Exports both flat and smooth shaded faces.

• Doesn't modify blender scene at all.

• Can split source mesh faces by material to support multi-material objects + BufferGeometry

• small, simple code (< 400 lines)

Flaws

• Blender 2.71 only (probably)

• Export only

• no texture support (not part of spec yet, but UV's are exported, so you can add textures yourself in JS code. )

• Blender scene hierarchy is not preserved. Export is always a single logical mesh.

• no multiple draw calls or offsets are calculated. (If your geometries are large you may have to deal with this in code too)

Use

• Add file (io_mesh_threejs_object.py) to blender add-ons folder

• Export using File > Export > Three.js Object (.js)

Options

• Selected Objects Only

  When checked, only currently selected mesh objects are exported, otherwise all visible mesh objects will be exported.

• Split by Material

  When checked, a separate THREE.Mesh and THREE.BufferGeometry will be created for each unique material assigned to any of the input mesh objects

Materials

Exported material values are determined by existing blender (Blender Render) material settings.

• Diffuse > Color

  Determines exported material diffuse color.

• Diffuse > Intensity

  Determines exported material diffuse color.

• Transparency

  Sets exported material transparent flag.

• Transparency > Alpha

  Sets exported material opacity value.

• Shading > Shadeless

  When checked, exported material is THREE.MeshBasicMaterial, and following are ignored.

• Shading > Emit

  Determines exported material emissive color.

• Shading > Ambient

  Determines exported material ambient color.

• Specular > Intensity

  Determines specular color. When set to zero, exported material is THREE.LambertMaterial and following attributes are ignored.

• Specular > Color

  Determines specular color.

• Specular > Hardness

  Determines exported material shininess.

TODO

• Implement split by object and preserve scene transformations

• Export linked-objects by re-using buffer geometries