Find nearby surfaces

Hi Vipin,

try using hm_collisioncheck (refer to hm help)

set output for mark_id_pene_surfs

you may need to set an appropriate thickness for surface component

Hi tinh,

How do i assign thickness to surface? right now the hm_collisioncheck is returning all surface ids i selected initially.

Hi VIpin

try assigning thickness to component storing the surface

Could you show your codes?

Hi tinh

*createmark surfs 1 'displayed'
hm_collisioninit
hm_collisionentitycreate surfs 1 0 1 0 0 0 0 0 0
hm_collisioncheck 0 0 0 1 0 0
hm_collisionend
hm_highlightmark surfs 1 'low'

right now my code looks like this. I cant find any option to assign surface thickness! how to do that?

Hi Vipin,

maybe the example given in hm help is wrong!

Below code is working in my hm2017, please try it (T1 is thickness of surfs in comp1, T2... comp2):

proc p_GetContactSurfs {CompId1 T1 CompId2 T2} {

   hm_collisioninit

   *createmark surfs 1 'by comp id' $CompId1

   hm_collisionentitycreate surfs 1 0 10 $T1 0 0 0 0 1

   *createmark surfs 1 'by comp id' $CompId2

   hm_collisionentitycreate surfs 1 0 10 $T2 0 0 0 0 1

   hm_collisioncheck 0 0 0 1 0 0 0

   hm_collisionend

   hm_highlightmark surfs 1 low

   hm_getmark surfs 1

}

Hi @tinh

I am not getting any output, i think there is no thickness for surfaces in my model.

Please tell me how to update thickness for surface components.

Really? 

T1 and T2 are thickness values to apply to surfs

in my test:

comp1 (ID 1001) has surfs 1 2 3 4 5 6 7 8 9 10

comp2 (ID 1002) has surfs 11 12 13 14 15 16 17 18 19 20

I invoked:

p_GetContactSurfs 1001 1.0 1002 1.0

it worked!

Hi @tinh

The problem is assigning thickness to surfaces. 

I am not able to find that option.

This command will assign thickness to the surfs

hm_collisionentitycreate surfs 1 0 10 $T1 0 0 0 0 1

in hm help, it says add 10 will add thickness to outside of surfs

maybe your surface normal is inward

could you try with number '30' - will add thickness to both inside and outside of surfs

proc p_GetContactSurfs {CompId1 T1 CompId2 T2} {

   hm_collisioninit

   *createmark surfs 1 'by comp id' $CompId1

   hm_collisionentitycreate surfs 1 0 30 $T1 0 0 0 0 1

   *createmark surfs 1 'by comp id' $CompId2

   hm_collisionentitycreate surfs 1 0 30 $T2 0 0 0 0 1

   hm_collisioncheck 0 0 0 1 0 0 0

   hm_collisionend

   hm_highlightmark surfs 1 low

   hm_getmark surfs 1

}

p_GetContactSurfs 1 1.0 2 1.0

Can you please try on this model, I dont know what is going wrong.     

Unable to find an attachment - read this blog

proc p_GetContactSurfs {CompId1 T1 CompId2 T2} {

   hm_collisioninit

   *createmark surfs 1 'by comp id' $CompId1

   hm_collisionentitycreate surfs 1 0 30 $T1 0 0 0 0 1

   *createmark surfs 1 'by comp id' $CompId2

   hm_collisionentitycreate surfs 1 0 30 $T2 0 0 0 0 1

   hm_collisioncheck 0 0 0 1 0 0 0

   hm_collisionend

   hm_highlightmark surfs 1 low

   hm_getmark surfs 1

}

p_GetContactSurfs 1 1.0 2 1.0

 

Can you please try on this model, I dont know what is going wrong.     

No no Vipin, a critical bug at the second 'hm_collisionentitycreate', the last argument must be '2' instead of '1'

it is group id of surfs that will be pushed into hm_collisioncheck

I test your model, it return surfs 4 9 3 2,  (thickness option 10 or 30 are all OK)

please try again and announce me

Unable to find an attachment - read this blog

Hey @tinh  Thank you so much!!/emoticons/default_biggrin.png' srcset='/emoticons/biggrin@2x.png 2x' title=':D' width='20' />/emoticons/default_biggrin.png' srcset='/emoticons/biggrin@2x.png 2x' title=':D' width='20' />

problem solved.