{"id":236,"date":"2011-02-20T03:25:37","date_gmt":"2011-02-20T03:25:37","guid":{"rendered":"http:\/\/www.funkboxing.com\/wordpress\/?p=236"},"modified":"2021-01-03T18:17:40","modified_gmt":"2021-01-03T18:17:40","slug":"blender-python-driven-animation-v1","status":"publish","type":"post","link":"http:\/\/funkboxing.com\/wordpress\/?p=236","title":{"rendered":"Blender – Python Driven Animation"},"content":{"rendered":"

[EDIT] – Just wanted to post this here in case I forget:<\/p>\n

A driver can use the current frame in the expression with –\u00a0bpy.context.scene.frame_current<\/p>\n

So you could do something like: sin((bpy.context.scene.frame_current-10)\/5)<\/p>\n

BUT!!! After 2.68 expressions in drivers only work if you have Auto Run Python Scripts turned on in UserPrefs>File<\/p>\n

————————————<\/p>\n

B2.56 doesn’t have proper events yet – so this is a hacky way to drive scene animation. I forgot where I found this info – but it worked so I wanted to make it available.
\n1) create Empty
\n2) add single keyframe to Zrot (frame 1)
\n– should have default expanded poly generator on it
\n3) add single driver to Yloc (frame1)
\n– in Drivers> choose – Scripted sxpression
\n– enter this expression<\/p>\n

float(exec(\"\\n\".join([l.body for l in bpy.data.texts[\"RUN\"].lines]))==None)<\/code><\/pre>\n
4) then a script called ‘RUN’ should execute every time the frame changes
\n– Zrot of Empty drives expression which (i think) grabs the text datablock of the script and runs it<\/p>\n
here’s a quick thing I did. set up the empty as above…
\nthen make a cube (named ‘Cube’) subdivide it a lot, then run this-<\/p>\n
 import bpy import random ob = bpy.data.objects['Cube'] verts = ob.data.vertices for v in verts: rxnum = round(random.uniform(-0.01 ,0.01), 4) rynum = round(random.uniform(-0.01 ,0.01), 4) rznum = round(random.uniform(-0.01 ,0.01), 4) v.co[0] = v.co[0] + rxnum v.co[1] = v.co[1] + rynum v.co[2] = v.co[2] + rznum scene = bpy.context.scene <\/code><\/pre>\n
BLENDER ARTIST THREAD<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
[EDIT] – Just wanted to post this here in case I forget: A driver can use the current frame in the expression with –\u00a0bpy.context.scene.frame_current So you could do something like: sin((bpy.context.scene.frame_current-10)\/5) BUT!!! After 2.68 expressions in drivers only work if you have Auto Run Python Scripts turned on in UserPrefs>File ———————————— B2.56 doesn’t have proper […]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,5,47],"tags":[],"_links":{"self":[{"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/236"}],"collection":[{"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=236"}],"version-history":[{"count":6,"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/236\/revisions"}],"predecessor-version":[{"id":2641,"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/236\/revisions\/2641"}],"wp:attachment":[{"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=236"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/funkboxing.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}