gp.pos

Syntax

Vector Access

v := gp.pos(gp<,i>)
gp.pos(gp<,i>) := v

Get/set the position of the gridpoint. Returns a vector, unless an optional component argument i is supplied, in which case it returns the component value.

Note that changing position vectors during cycling will not update geometry-derived values calculated during an update. See the intrinsic zone.do.update.

Returns:

v - position vector or component

Accepts:

v - position vector or component

Arguments:

z - zone pointer

i - optional vector component, from 1 to 3

Component Access

f := gp.pos.x(gp)
gp.pos.x(gp) := f

Get/set the \(x\)-component position vector.

Returns:f - \(x\)-component position vector
Accepts:f - \(x\)-component position vector
Arguments:z - zone pointer
f := gp.pos.y(gp)
gp.pos.y(gp) := f

Get/set the \(y\)-component position vector.

Returns:f - \(y\)-component position vector
Accepts:f - \(y\)-component position vector
Arguments:z - zone pointer
f := gp.pos.z(gp)
gp.pos.z(gp) := f

Get/set the \(z\)-component position vector.

Returns:f - \(z\)-component position vector
Accepts:f - \(z\)-component position vector
Arguments:z - zone pointer