UnionΒΆ

Learning targets

  • Use Boolean operation to form union of two objects

This example unites two circles by means of the Boolean union operator.

_images/ex2d_union_mesh.png

Surely, we could also create this geometry by a simple overlay. However, a Boolean operation allows to apply shape manipulating operations such as corner rounding to the resulting shape.

.jcm Input File

  • layout.jcm [ASCII]

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    Layout2D {  
      UnitOfLength = 1  
      Objects {
        Parallelogram {
          Priority = ComputationalDomain
          DomainId = 1
          BoundingBox {
            Offset = [1 1 1 1]
          }
        }
        
        BooleanOperation {
          DomainId = 2 
          Operator = Union
          A { 
            Circle {
              Radius = 6
              GlobalPosition = [-4.0 0.0]
              RefineAll = 2
            }
          }
          
          B {
            Circle {
              Radius = 4
              GlobalPosition = [1.75 0.0]
              RefineAll = 2
            }
          }
        }
      }  
    }
    

To apply a corner rounding we add the following definitions

BooleanOperation {
  A {
    ...
  }
  B {
    ...
  }
  CornerRounding {
    Radius = 0.5
    MaxAngle = 140
    NPoints = 5
  }
}

which yields the following geometry

_images/ex2d_union_mesh_rounded.png