Breaking falling motext

[Brian Jones]

you have to break it into the parts you want. If you want fractured type parts Thrausi https://nitro4d.com/blog/freebie/thrausi/ (or something like it) helps a lot

[Gene Weglarz]

Thanks. I have Thrausi amd NirtoBlast, I just thought I could somehow set segments on the letter and have that fracture on collision. Because then, I want to have a robot arm pickup a broom and sweep the shattered particles off the stage.

Don’t know if the link will lead to file successfully.

9623_2015outlawpenguinrobotarmwithfallingo0002.c4d.zip

[Brian Jones]

Fracture of disconnected polys in your letter would give only polys after collision – if that’s what you want then make the ‘O’ editable connect all the parts, then select all the polys and use Disconnect, put that into a Fracture… Otherwise if you want solid chunks from the collision you will have to use Thrausi.NitroBlast to pre-break the O. Here’s a test of that 9626_2015outlawpenguinrobotarmwithfalling2.c4d.zip

the extra xpresso on the Thrausi’d O is to turn off Self Collisions in the Dynamics Body tag until it collides with something, otherwise the way Thrausi works stuff starts to break up as it falls

[Gene Weglarz]

Thanks, that’s the start I needed. Now I just have to use either nitroblast or thrausi to get the effect I want. That’s a great help.

[Gene Weglarz]

I have only run some tutorials on the Nitro 4D stuff. After I break them, will they interact with the robot body as a rigid body? Meaning if the robot hits the chunks on the floor, will they move? If I bring the robot back into scene with a broom will the Nitro chunks honor dynamics tags for rigid/collider so I can sweep them off?

You’ve been a great help. I really thought there would be an easier way besides a plugin.

[Brian Jones]

yes, the chunks will react to the robot if you put a collider body tag on to the part(s) of the robot you want to affect the chunks – it’s just like the floor, without the collider tag the parts would just go right through. Yes, it can be an animated object like the robot (or a broom) because the collider tag, unlike the Dynamic tag, isn’t trying to add motion to a system, it’s just a recognition that an object is there for dynamic calculation.