Rigging Motion platforms in Maya
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Hello community.
My first post so apologies if anything is not the norm! I am using Maya to rig & animate motion platforms. The movement data is exported as CSV points and inputted into a motion controller which drives the rigs. Here is a link to a screencast of the project in question. https://www.dropbox.com/s/vg3o91p9rp...st....mov?dl=0 The pistons and ram bodies are connected with Aim constraints and the ram is parented to the top plate. So as the top plate moves all 6 rams react, however I am having a couple of issues with rigging the model. 1. Limiting the stroke length of the rams. I have limited (attribute editor, limit information) the Y translate on the controller so the rams are limited at 0 and 300 (stroke length). However I can't find a solution for limiting the rotation. If the rig is lowered at a 0 position and only 2 rams are raised the other 4 should not lower past 0. see attached photo 1 Likewise at the top position no ram should go above 300. see attached photo 2 I need a way to either add limiting positions to each object or perhaps add a box around the model which could dynamically stop the rams going past a specific point. Or any other suggested ideas! 2. Exporting distance (measure tool) as CVS points. At the moment I have parented a small cylinder to each ram and exported the movement data of the cylinder to CSV points. I would like to connect locators to the ram and ram body to monitor the distance of travel throughout a move but I can't find a way to export the distance data from the measure tool (0-300) as CSV points. :help: see attached photo 3 Is there a way you can view the measure tool distance in the channel box? I have struggled to find any info online so any feedback would be greatly appreciated! :beer: |
Hello alcalc,
I have, word for word, the exact same problem. For the past 5+ years I have, on and off, been troubled with this problem. I am not convinced there is a simple method to achieve this, the motion platform is constructed from 6 'actuators' that push the top platform around, that in turn, is restricted by universal joints. This is easily achievable when controlling the individual actuators but becomes a crazy 'cyclic' relationship when attempting to control it via a central IK. I wish I could offer some actual, practical, advice but I am actually writing to find out if you managed to find a solution. Please let me know, maybe between us we can get a semblance of something workable. Cheers |
Hi alcalc,
I have created tools for the data export to motion controllers with either .txt or .csv files, I am happy to discuss with you. Where are you based and what kind of productions are you working on? |
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