I am starting a new Tutorial on DMM plugin for maya !
Few Basic
A few Basics first , about the DMM plugin, as it exists, on sep 2012 running on Linux 64 Maya 2012..
There was a talk about , DMM plugin using Bullet solver, early on, but on digging into it , found that it does not use bullet solver or use physX solver.
on the web page it says linux 64 is not multithreaded, and linited to 1000 tets(tetrahedron) , but then if you have installed hotfix 2 , on linux it is multithreaded and the tet limit is 2500.
DMM plugin is based on Continum Mechanics , so with DMM all objects are filled solid for the plugin to start simulating.
continuum, meaning the matter in the body is continuously distributed and fills the entire region of space it occupies.
The Material (not to be confused with maya Material) in DMM is the property of an object based of the material
i.e wood material break in a certain way , as compared to ceramic !
Material Properties (info gathered from DMM Plugin )
Now lets get started with the Basic Material property with teh default material applied to it..
1 -> Young's modulus is named after Thomas Young, the 19th century British scientist, is a mesaure of stiffness, higer the Value more stiffer the material would be.
2 -> Youngs Dampening, is the energy lost by the material wneh subjected to force .
3-> Poisssons Ration , is the volume presrvation attribute of the material, if you need the volume to stretch , postive values
if you need the volume to shrink , negative values, to preserve the volume as original Zero.
4 -> Density , is kilograms per unit volume of the material , more the value more denser the part of material becomes, and hence becomes heavier !
5 -> Tougness , is the breakability attribute of the material, lower values would mean that it can be easily fractured.
6 -> Yield , is material property , stress at which a material begin to deform plastically.
7 -> Max Yield , is the attribute beyound which it will spring back.
8 -> Creep , is how fast a material can plastically deform.
9 -> Friction , is the attribute to make the material to slide or to stick
10 -> WakeUpRadius, is the attributewhere you can control the radius of nodes around an impact point in which Tets will be woken up if the
object is frozen. Reducing Wakeup Radius can create materials that act very rigid except in areas where forces are applied.
These are the key material features to Fracture, Deform , Bounce your objects .
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