6. December 2011

Fine tune three.js export from Blender

Three.js exporter for new version of Blender 2.60 supports many features. The problem is that default exporter settings generates quite big JSON file even for small models.

Here is list of defaut options for save model function from export_threejs.js:

         filepath = "",
         option_flip_yz = True,
         option_vertices = True,
         option_vertices_truncate = False,
         option_faces = True,
         option_normals = True,
         option_uv_coords = True,
         option_materials = True,
         option_colors = True,
         align_model = 0,
         option_export_scene = False,
         option_lights = False,
         option_cameras = False,
         option_scale = 1.0,
         option_embed_meshes = True,
         option_url_base_html = False,
         option_copy_textures = False,
         option_animation = False,
         option_frame_step = 1,
         option_all_meshes = True

These are good settings when you want to save all objects from scene. It is quite overkill when you need to save just one dynamically generated object. I recommend to turn off following options:

option_all_meshes, option_materials

Here is sample code in Python which will select object by name and save it to file with defined options:

import bpy

bpy.ops.object.select_name(name="ObjectName")
bpy.ops.export.threejs(filepath="ObjectName.js", option_all_meshes=False, option_materials=False)

Further articles about Blender and Python are located under the tag Blender on my blog.

Enjoy 🙂

30. June 2011

HTML5 WebGL/Canvas – Standard Slide – sneak peek

Year ago we developed application for navigating in Standard Slide catalog. It was written in Flex and still it’s serving very well.

This year we decided to make further step and we’re preparing version in HTML5. Not only that. We would like to show 3D models right in the browser.

Many thanks to Three.js for great Canvas/WebGL library.

I’ll share small sneak peek with you. I recommend to view it in Google Chrome or Firefox 4+ which has support for WebGL. Other modern browsers supports Canvas and 3D model will be displayed there as well.

Application is not finished yet. Models are in prototype version. We have to fix some issues, but it nicely demonstrates power of HTML5.

Update: You can test newer version 0.6

Test Standard Slide 3D version 0.6.

27. June 2011

Quick start: Blender and Python

If you know right tricks then writing scripts for Blender is quite easy.

Here is video tutorial that explains some of those tricks. Enjoy.

22. June 2011

Create mesh with correct faces in Blender by Python script

This video tutorial explains how to create mesh using Python script.

Vertices must be defined in right order when we want to define correct face.

Let’s imagine that we would like to create following object:

Numbers are marking vertices beginning from 0.

Let’s define them:

faces = ((0,1,2,3), (1,2,6,5), (1,0,4,5), (2,3,7,6), (0,3,7,4), (4,5,6,7)

Just display normals to see whether everything is ok.

As you can see, only few faces have correct normal.

In order to define face correctly use following rule:

Imagine that you’re sitting inside object and you’re looking outside.

You have to define face by naming vertices in clockwise fashion.

Solution is:

faces = ((0,1,2,3), (5,6,2,1), (4,5,1,0), (2,6,7,3), (0,3,7,4),(7,6,5,4))

For more details about Python and Blender pay a visit to blendercookie.com.

21. June 2011

Writing Python scripts for Blender with Intellij IDEA

Blender is powerful 3D modelling tool. What makes it really powerful is support for Python.

I was playing little bit with configuration of Intellij IDEA and I found out that it is possible to use Intellij IDEA for developing Python scripts for Blender.

Here is video tutorial:

Update 23.06.2011: Video tutorial was recorded for Blender 2.57. There is small change in Blende 2.58 – scripts are located in Program Files directory, like: C:\Program Files\Blender Foundation\Blender\2.58\scripts\modules

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