[Bf-python] vertex animation in blender 2.5 / shapekeys

[Campbell Barton]

# Assuming you added 2 shape keys to the active cube
bpy.context.object.data.shape_keys.key_blocks["Key 1"].value = 0.5
bpy.context.object.data.shape_keys.key_blocks["Key 1"].keyframe_insert("value")

For more info on keyframing see:
http://www.blender.org/documentation/blender_python_api_2_57_release/bpy.types.bpy_struct.html#bpy.types.bpy_struct.keyframe_insert

On Mon, May 23, 2011 at 10:21 AM, sc3sc3 . <sc3sc3 at gmail.com> wrote:
>
> hi
>
> sorry about crossposting
>
> actually it concerns this question
> http://blenderartists.org/forum/showthread.php?219358-vertex-animation-in-blender-2.5
>
> but noone apparently has an answer
> so i hope to find it here
>
>
> does anybody have a simple example concerning animating vertices ( shapekeys
> ) ?
>
> http://wiki.blender.org/index.php/Dev:2.5/Py/Scripts/Cookbook/Code_snippets/Meshes#Vertex_groups_and_shapekeys
> there is for example this script
> but how does one introduce the next step
> and actually animating those shapekeys through python ?
> i tried all kinds of ways of adding keyframes on the timeline but of no
> avail :-(
>
>
> #----------------------------------------------------------
> # File shapekey.py
> #----------------------------------------------------------
> import bpy, random
>
> def run(origin):
>    # Add UV sphere
>    bpy.ops.mesh.primitive_uv_sphere_add(
>        segments=6, ring_count=5, size=1, location=origin)
>    ob = bpy.context.object
>    ob.name = 'ShapeKeyObject'
>    ob.show_name = True
>
>    # Create Left and Right vertex groups
>    left = ob.vertex_groups.new('Left')
>    right = ob.vertex_groups.new('Right')
>    for v in ob.data.vertices:
>        if v.co[0] > 0.001:
>            left.add([v.index], 1.0, 'REPLACE')
>        elif v.co[0] < -0.001:
>            right.add([v.index], 1.0, 'REPLACE')
>        else:
>            left.add([v.index], 0.5, 'REPLACE')
>            right.add([v.index], 0.5, 'REPLACE')
>
>    # Add Basis key
>    bpy.ops.object.shape_key_add(None)
>    basis = ob.active_shape_key
>
>    # Add FrontForward key: front verts move one unit forward
>    # Slider from -1.0 to +2.0
>    bpy.ops.object.shape_key_add(None)
>    frontFwd = ob.active_shape_key
>    frontFwd.name = 'FrontForward'
>    frontFwd.slider_min = -1.0
>    frontFwd.slider_max = 2.0
>    for v in [19, 20, 23, 24]:
>        pt = frontFwd.data[v].co
>        pt[1] = pt[1] - 1
>
>    # Add TopUp keys: top verts move one unit up.  TopUp_L and
>    # TopUp_R only affect left and right halves, respectively
>    keylist = [(None, ''), ('Left', '_L'), ('Right', '_R')]
>    for (vgrp, suffix) in keylist:
>        bpy.ops.object.shape_key_add(None)
>        topUp = ob.active_shape_key
>        topUp.name = 'TopUp' + suffix
>        if vgrp:
>            topUp.vertex_group = vgrp
>        for v in [0, 1, 9, 10, 17, 18, 25]:
>            pt = topUp.data[v].co
>            pt[2] = pt[2] + 1
>
>    # Pose shape keys
>    for shape in ob.data.shape_keys.key_blocks:
>        shape.value = random.random()
>    return
>
> if __name__ == "__main__":
>    # Create five object with random shapekeys
>    for j in range(5):
>        run((3*j,0,0))
>
>
>
> thanks for any help
> kind regards
> sc3*2
>
>
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>



-- 
- Campbell