#### Command list

• Input handling
• Solution control and techniques
• Output
• Mesh commands
• Nodes and connectivity
• Material properties
• Initial conditions
• Boundary conditions
• Contact and tied interfaces
• Rigid bodies
• Connectors
• Parameters and functions
• Geometries
• Sets
• Coordinate system
• Particle
• SPH

### COORDINATE_SYSTEM_NODE

###### Coordinate system
*COORDINATE_SYSTEM_NODE
"Optional title"
csysid, N${}_1$, N${}_2$, N${}_3$

#### Parameter definition

VariableDescription
csysid Unique identification number
N${}_1$, N${}_2$, N${}_3$ Nodes defining the location and direction of the local system

#### Description

Defines a local cartesian coordinate system. The system is defined through 3 user defined nodes. This system will automatically be updated if the nodes are moving. The local x-direction, $\hat{\mathrm{x}}$, is defined as the direction of a vector pointing from node N${}_1$ to N${}_2$. The local z-direction, $\hat{\mathrm{z}}$ is defined as the cross product of $\hat{\mathrm{x}}$ and the vector pointing from N${}_1$ to N${}_3$. The local y-direction is $\hat{\mathrm{y}} = \hat{\mathrm{z}} \times \hat{\mathrm{x}}.$