Cinema 4D Tutorials: How To Fracture An Object Ready For Dynamics

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How To Fracture An Object Ready For Dynamics Rate Topic: -----

#1 User is offline   SFX 

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Posted 02 April 2008 - 08:19 AM

One way is to use TP and create a particle from the object you wish to fracture, set pfracture speed to zero, you can then do a current state to object on the fracture geometry, you will then have a set of indiviual meshes for the fractures. You may have to do a axis center of the pieces

You can also do it with explosion fx, set the efx time to say 10 % but set all the explosion amounts to zero, you then have an exploded object but the pieces remain intact

Doing a current state to obect gives you a single mesh so you have to do a functions - explode segments to get the individual fragments. You will also have to do an axis center on the fragments
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Posted 02 April 2008 - 01:56 PM

Here is a quick test using my amazing modelling skills for the bottle and silverbullet for the dynamics

http://www.black-and...bottlesmash.mov
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#3 User is offline   triplej96 

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Posted 19 October 2008 - 05:17 PM

View PostSFX, on Apr 2 2008, 02:56 PM, said:

Here is a quick test using my amazing modelling skills for the bottle and silverbullet for the dynamics

http://www.black-and...bottlesmash.mov



Hi Paul its joshfilms from the cafe. First off this animation is great :). I had a question I just got silverbullet today. Been playing with it. Pretty easy to get the hang of but exactly did you achieve that? Whenever I have a kinematic object collide with a dynamic object by its self it just moves it or knocks it over. How can you make "one" object explode like you animation?

If I build a wall with multiple cubes then it works but not with a single object like a bottle. I"m sure thier is a easy setting I'm missing but can't seem to get it working yet.

thanks
Josh
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Posted 19 October 2008 - 05:59 PM

Well you have to fracture the object either using explosion fx or TP frag, you then have to have these frags as editable objects and center their axis

The you can use silverbullet on them, have them set to start sleeping and most probably you would want a full unfractured object showing untill the point of collision and then swap visibility for the frags
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#5 User is offline   triplej96 

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Posted 19 October 2008 - 07:24 PM

Thanks Paul. I will play around with it.

Josh
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Posted 20 October 2008 - 12:28 AM

Thank you for the help Paul I got it working. I have one more quesiton about silverbullet. Maybe its better to ask Remo but it seems you have great knowledge of it as well.

Using the technique you described ala your video with the glass bottle shattering. Is their away to make some of the bottle (your example) not shatter using silverbullet. I.E. the bullet just breaks the glass it hits and the rest stays in tact?

thanks

Josh
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Posted 20 October 2008 - 12:59 AM

just set their tags as static non movable
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#8 User is offline   triplej96 

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Posted 20 October 2008 - 02:17 AM

Thanks for the reply Paul so I guess it will require some manual work selecting the polys I don't want effected.

thanks again.

Josh
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Posted 20 October 2008 - 03:53 AM

if you have many frags that are static and a few that are dynamic put them all under a null, add an sb tag to the null and set to static non movable, from the tag menu choose copy tag to children, then individualy select the tags on the frags that are to be dynamic and change their sb properties
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Posted 20 October 2008 - 08:08 PM

Thanks I will try your suggestions.
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Posted 22 October 2008 - 01:23 AM

Hey Paul. Here was my first render with the explosion fx method.

Their is certainly some problems with how the glass interacts after the break but I'm still learning silverbullet and cinema smile.gif.

HD
http://www.vimeo.com/2033398
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Posted 22 October 2008 - 03:46 AM

try upping the substeps and also use a non fraged sphere made visible and the frags invisible then switch visibility at impact
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