Mass and MaterialProperties

[dannyvdh]

Can you tell me a little bit more how these parameters work, cos it's very difficult to make a workpart
behave normaly, for example.
If you push a workpart it moves very unnatural, it jumps,bumps up and down.
If I make the mass very low 0,0000000000000002 it is the most stable.
Also the Material Properties, if I change them, always the mass changes to.
How can I calculate it exactly?

[EasyPLC_Master]

I know the physics simulation are not easy to manage, but testing a little bit the parameters can be enough to to get the wanted behavior.
I will try to explain a little the main parameters:
The material properties are importants parameters about the kind of material the element is made, they are composed by:

• Elasticity: values 0 to 1, 0 means material no elastic, 1 material very elastic
• StaticRoughness: values 0 to 1, 0 means material without rough when is not moving, 1 means material very rough when is not moving
• DynamicRoughness: values 0 to 1, 0 means material without rough when is moving, 1 means material very rough when is moving

The mass parameter is the 'weight' that the object will have in the physic world. Take note that when you change the element's material properties or the size (scale) the mass parameter will change.

Keep in mind that also is very important the configuration of the two materials that are in contact, I recommend you to create a workpart and a static element or dynamic element or static model and try to put in contact and changing all this related parameters to see as they behave.

Other important point is that the very small ojects (usually the workparts) have strange behaviors and dificult to manage when are small, this is due to like the physical engine works. Then if you need small workparts, you must change the scale of all the elements to increase the world size and to get that the workpart will be bigger for the physical engine, or you can do tricks in order to create a shape bigger for the workpart and the model assigned to it will be smaller.

Good luck in your tests!