Dops

FETCH DATA FROM DOP TO SOP using expression:

• `dopfield(dop, objectSpec, subDataName, recordType,recordNum, fieldName)`

http://127.0.0.1:48626/expressions/dopfield

example to fetch imuplse strength

dopfield("../..", stamp("../OUT", "OBJID", 0), "Impacts", "Impacts", stamp("../copy_forcelines", "copy1_pt", 2), "impulse")

example to fetch impact position.X from dop:

`dopfield("../..", stamp("../OUT", "OBJID", 0), "Impacts", "Impacts", $PT, "positionx")`

For ignoring collisions in particular RBDpacked object:

 There are two important attributes to do this in a simple way

 @collisiongroup

 @collisionignore

Quick Rigid body constraint networks important attribs:

    On constraint network

 - primitive attrib - @constraint_name

 - point attrib       - @name

    On RBD objects

 - point attrib      - @name

 it will constraint the points matching @name attribute

TIP:

• GLUE Constraints cant be broken by applying forces, It can only break by the impact!

• Hard constraints with break threshold based on force can be a workaround for the above issue

• Cone-twist constraints along with break threshold based on angle can create intresting bend effect before the objects break

• spring constraints needs rest-length attribute  in the constraints primitive, this can be modified in sop solver to get interesting effects.

Important two attribs for cloth and wire sim

    Dont ever forgot normal drag and tangent drag which will affect the sim drastically