Failure to perform boolean difference operation

Altair Forum User

I am trying to perform a simple boolean operation, subtracting a small sphere (radius 0.1131) from a large sphere (radius 0.5). I am using a script to create the two spheres:

 

*settopologydisplaytype(1)

*createmark(materials,1)

*clearmark(materials,1)

*collectorcreateonly(components,'point','',3)

*createmark(components,1)

*clearmark(components,1)

*createmark(components,1) 'point'

*materialupdate(components,1,'')

*createmark(components,1)

*clearmark(components,1)

*createmark(components,1) 'point'

*clearmark(components,1)

*createmark(properties,1)

*clearmark(properties,1)

*createmark(materials,1)

*clearmark(materials,1)

*createmark(elements,1)

*clearmark(elements,1)

*createnode(0.0,0.0,0.0,0,0,0)

*collectorcreateonly(components,'ball','',3)

*createmark(components,1)

*clearmark(components,1)

*createmark(components,1) 'ball'

*materialupdate(components,1,'')

*createmark(components,1)

*clearmark(components,1)

*createmark(components,1) 'ball'

*clearmark(components,1)

*createmark(properties,1)

*clearmark(properties,1)

*createmark(materials,1)

*clearmark(materials,1)

*createmark(elements,1)

*clearmark(elements,1)

*solidspherefull(0.0,0.0,0.0,0.5)

*collectorcreateonly(components,'sphere_140','',3)

*createmark(components,1)

*clearmark(components,1)

*createmark(components,1) 'sphere_140'

*materialupdate(components,1,'')

*createmark(components,1)

*clearmark(components,1)

*createmark(components,1) 'sphere_140'

*clearmark(components,1)

*createmark(properties,1)

*clearmark(properties,1)

*createmark(materials,1)

*clearmark(materials,1)

*createmark(elements,1)

*clearmark(elements,1)

*solidspherefull(0,0,0,0.1131)

*createmark(components,1) 'sphere_140'

*createvector(1,1.0000,0.0000,0.0000)

*translatemark(components,1,1,-0.566639982)

*createmark(components,1) 'sphere_140'

*createvector(1,0.0000,1.0000,0.0000)

*translatemark(components,1,1,-0.179599557)

*createmark(components,1) 'sphere_140'

*createvector(1,0.0000,0.0000,1.0000)

*translatemark(components,1,1,0.109171287)

*retainmarkselections(1)

*currentcollector(components,'ball')

*retainmarkselections(0)

 

The two spheres as shown in the image attached intersect each other. However when I try to perform a boolean difference (removing the small sphere from the large one) the operation ends up just deleting the small sphere without subtracting it from the large sphere. Any idea what is wrong? 

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Hi,

 

Remove operation involves removing coincident pieces of solids from other solids.  For example, a cylinder partially buried in another solid can be removed in such a way that it leaves a cylindrical recess in the other solid.

 

if you need the effect as shown in the picture below, use Union.

 

 

<?xml version="1.0" encoding="UTF-8"?>