Mass of multiple Objects

[info@dk-vision.com]

Is it possible to change the physikal densety,like make the objects 2x heavier, of multiple different objects at once?

[tsn]

When you import the objects as a MultiBody than it's possible to factorize mass via the "Density" parameter. If the objects are part of a standard SD file than you need a Python batch script:

Code: Select all

factor = 2.0
selObjs = scene.getSelectedNodes()
for node in selObjs:
	newMass = node.getParameter("@ mass") * factor
	node.setParameter("@ mass", newMass)

Of course, the objects' rigid body property must be active, otherwise the script throws an error.

-Thomas

[info@dk-vision.com]

Thanks! I thing I have to dig a little bit into RF scripting!

[tsn]

Thanks! I thing I have to dig a little bit into RF scripting!

It's always a good idea to have a look at Python and RF's scripting capabilities

[info@dk-vision.com]

But it would be nice to have something like a general mass parameter, something like kg/dm³.

[tsn]

But it would be nice to have something like a general mass parameter, something like kg/dm³.

For MultiBodies there is exactly the requested parameter (not exactly, but kg/m^3): that's density and you can change it globally in the Node Params. From this value RF calculates the mass for each node inside the MultiBody. When you go to "File > Summary Info..." you can see the individual mass for the nodes.

For single nodes from an SD you could turn the script I provided into a system or user script and hook it to the icon bar. When you call it, a GUI appears where you can enter the desired value and change the value for the selected nodes. Just have a look at the manual's scripting reference. There you'll find all you need. If you need assistance, just get back to the forum and we'll get you started.