ABOUT
ME:
hi i'm a 3d artist/animator from India.
i'm 18 yrs old. i've been into 3d for 2
yrs. and i work on 3dsmax.
NAME: Akash karmakar
AGE: 18
OCCUPATION: 3d artist (games development)
SOFTWARES KNOWN: 3dsmax, photoshop, painter,
premier, after effects
ABOUT
THIS TUTORIAL:
this tutorial demonstrates simulating cutting
and cracking effects in 3d environment.
this tutorial is in text format and i've
included images in numbers correspondingly
where they apply.
i've also included animation video files
(.avi format) correspondingly , which r
coded in DIVX.
TUTORIAL:
cracking and breaking effects in 3d:
INTRO:
have u even thought of having a sword in
your hand. where u can zig-zag the sword
and cut and chop off things around u. but
if u r an animator u might be more interested
in cutting and chopping objects in your
3d software.
well this is a tricky thing, which envolves
realtime change in mesh count. also mapping
them can be tricky.
suppose i cut off some thing i can even
see the inside part.
so here r some trick i've developed working
on my own...and i've suceeded a bit...
here i've used 3dsmax..but same effect can
be achieved on other packages too.
as per material nature objects can be brittle,
hard and soft...which show different cutting
behaviour.
so here i've five main sections:
1) cutting a hard object( like wood)
2) cutting a semi-hard object ( like wax)
3) cutting a soft object(like bread or cake)
4) cracking of brittle objects( like earth
or ice crust)
5) textuing of cutting objects.
so here we start:-
PART 1
cutting a hard object... lets cut a
cylinder..
1)
create a cylinder in front or left viewport
so its created horizontally. u may increase
the sides segment for some smooth results
though its necessary.name it as "wood"
2)
now create some axeblade like object,
using spline and extruding it. name
it as "axe" here make copy
of it and name it "axecut"
for this time u can hide the 'axe'.
see the image for arrangement.
3)
now we'll cut the cylinder using the
axe...for this we'll use BOOLEAN. select
the cylinder and go to compound objects>boolean.
pick the "axe" as OPERAND
and go to modify panel. there go to
boolean sub-object and select 'axe'.
4)
then turn on ANIMATE(hotkey..n) move
to frame 30 and drag it down so it slices
down the cylinder into 2 parts. be sure
it completly passes via the cylinder.
now u'll see the cylinder is interactively
cut into 2 parts(2 elements)
here after ...now move the '0' key frame
to 1 or 2..why?..see it the later part.
at this part unhide the 'axecut' object
and animate it following the cut( same
way as u animated the 'axe' in the boolean
sub-object) turn off animate.
5)
but still u can see they r not apart..ie
the cut part should fall down. so for that
apply an edit mesh modifier on top( dont
collapse the cylinder or the animation will
vanish) now go to element mode and scroll
the time slider to 30 or above. then u'll
be able to select the cut separated element
alone.
