## radius

Returns the radius value..

**Notes:**

1) This is the radius of the disks displayed to the vertices of volumes for the command
displ vertex vol

2) It is also of the commands sphere vol and
deformation vol
### radius(r)

Changes this value.
### radius(x1,y1,z1, x2,y2,z2, ...)

Returns the radius of the 3D polygonal line **(x1,y1,z1, x2,y2,z2, ...)**.
### radius brush(id)

Returns the dimensions of
brush **id** according to its type:

**disk**: radius x and y of an elliptical brush.

**image**: dimensions x and y of the image.

**smooth**: side of the smoothing window.

**average**: side of the average window.

**rectangle**: dimensions x and y.
### radius brush(id)=rx,ry

Changes these dimensions.

**Note:** If the brush **id** is of type image it is reset if the dimensions change.
## radius dist

### radius dist vol(id)

Returns the automatically computated radius of particles (or vol vol)
of volume **id** when this volume has been built with
generate particle image(id0)vol(id1)vol(id).
### radius dist vol(id)=r

assigns this value.

**Option:**

**c,m**: r=coefficient, m = maximum (1 by default).

**for each point ****p** of volume **id**, if **a** = average distance of p with its
neighbours, the radius of the particle displayed at this point is **c * a**.

Example: `radius dist vol(id)=.4,1.25;`

## radius fac

### radius fac(num)vol(id)

Returns the radius of facet **num** of the volume **id**.
### radius fac(num) vol(id)=r

Force points facet **num** of the volume **id** has to be internal to the sphere center itsof gravity and radius **r**.
## radius image

See image radius.
## radius line

### radius line(p)

Returns the centet and the radius of curvature of the curve p{0,2} (first 3 points of the 3D curve **p**).
Returns NIL in case of zero curvature.

**Options:**

**number(num)**: Returns the centet and the radius of curvature of the curve p{num-2,num-1,num}
(num=1 by default).
## radius vertex

### radius vertex(s) var("x")

Returns the radius of the vertices **s** of the variable **x**.
### radius vertex(s) var("x")=r

Forces vertices **s** of variable **x** to be on the sphere with center the center of gravity and of radius **r**.
### radius vertex(s)vol(id)

Returns the radius of vertices **s** of volume **id**
### radius vertex(s) vol(id)=r

Forces vertices **s** of volume **id** to be on the sphere with center the center of gravity and of radius **r**.
## radius tran

### radius tran vol(id)

Returns the center and radius of curvature of the displacement trajectory of the volume **id**.

**Notes:**

1) yes radius must be active.

2) Used by adjust vol law (power law 1/3).
### radius traj tran number(num)vol(id)

Returns the center and radius of curvature of the curve at point **num** of the displacement trajectory of the volume **id**.
## radius var

### radius var("x")

Returns the radius of the variable name **x**.
### radius var("x")=r

Forces points of variable **x** to be on the sphere with center the center of gravity and of radius **r**.
## radius near

### radius near vertex(s)vol(id)

Returns the average distance from vertex **s** volume **id** to its neighbours.
### radius near vertex(s) vol(id)=r

Changes this distance.

**Note:**

`generate radius near vertex vol(id);`

generates these average distances.
## radius vol

### radius vol(id)

Returns the radius of the ball including the volume **id** and centered
at the center of gravity.
### radius vol(id)=r

Forces points of volume **id** to be on the sphere with center the center of gravity and of radius **r**.
## See also: