[Bf-python] shape key animation on a bez curve (blender2.5)

[Alberto Torres]

There is a bug in curve shape keys. Do this:

bpy.ops.object.shape_key_add(from_mix=False)

Or apply this patch:
http://projects.blender.org/tracker/?func=detail&aid=21670&group_id=9&atid=127


2010/7/16 Goat Man <goatman.py at gmail.com>:
> This script creates a bezier curve and tries to add shape animation to it.
>  Operators are command line safe, so it works by ./blender -P script.py
> Problem is the handles of the first few bez points shoot off to infinity
> when the shapekey is viewed.
> Not sure if this is a bug or i am just not using the API correctly.
>
> import bpy, random, sys for o in bpy.data.objects: o.selected=False
> bpy.context.scene.update() scn = bpy.context.scene data =
> bpy.data.curves.new(name='brain', type='CURVE') for i in range(2): spline =
> data.splines.new('BEZIER') bez = spline.bezier_points[-1] bez.co.x = i * 0.4
> for j in range(3): x = i * 0.4; y = j * 0.1 spline.bezier_points.add() bez =
> spline.bezier_points[-1] bez.co.x = x bez.co.y = y bez.handle1.x = i * 0.4 +
> random.uniform(-.1,.1) bez.handle1.y = j * 0.1 + random.uniform(-.1,.1)
> bez.handle2.x = i * 0.4 + random.uniform(-.1,.1) bez.handle2.y = j * 0.1 +
> random.uniform(-.1,.1) bez.selected_control_point = bez.selected_handle1 =
> bez.selected_handle2 = True # and 2 = Vector, what is bez.radius?
> bpy.context.scene.update() obj = bpy.data.objects.new(name='brain',
> object_data=data) bpy.context.scene.objects.link(obj)
> bpy.context.scene.objects.active = obj print( dir(obj.data) ) print(
> obj.data.shape_keys ) bpy.ops.object.shape_key_add() print(
> dir(obj.data.shape_keys) ) sk = obj.data.shape_keys sk.relative = True print
> ( dir(sk.keys) ) print ( sk.keys ) bias = sk.keys[0] print ( dir(bias) )
> print (bias.name, bias.relative_key) print ( bias.data )
> bpy.ops.object.shape_key_add() bpy.context.scene.update() ## modify the
> first shape key data - strange results when then shape is viewed, handles go
> off into infinity shape = sk.keys[-1] for i,bez in enumerate( shape.data ):
> bbez = bias.data[ i ] #bez.co.x = 1.0 #bez.co.y = .0 #bez.co.z = .0 print(
> bbez.co, bez.co ) bez.co.x = -bbez.co.x bez.co.y = -bbez.co.y bez.co.z =
> -bbez.co.z
> _______________________________________________
> Bf-python mailing list
> Bf-python at blender.org
> http://lists.blender.org/mailman/listinfo/bf-python
>
>