cda (version 1.5.1)

helix: helix

Description

helix curve

Usage

helix(R0 = 500, pitch = 600, N = 5, delta = pi/8, delta0 = pi/2, n.smooth = 100 * N, right = TRUE)

Arguments

R0

radius in nm

pitch

pitch in nm

N

number of particles

delta

twist angle between two particles

delta0

angle shift at origin

n.smooth

number of interpolation points (for plotting purposes)

right

logical, handedness

Value

list with r, sizes, invalpha, angles, R0 and smooth interp. points

Details

add particles on an helix

See Also

Other user_level cluster: cluster_chain, cluster_dimer, cluster_dimer_end, cluster_helix, equal_angles, equal_sizes

Examples

cl <- helix(500, 1000, 36, delta=pi/6, n.smooth=1e3) ; str(cl)
## Not run: 
# require(rgl)
# open3d()
# spheres3d(cl$smooth, radius=1,col=2)
# ## ellipsoids are oriented following the helix
# sizes <- equal_sizes(40, 20, 20,NROW(cl$positions))
# rgl.ellipsoids(cl$positions, sizes, cl$angles, col="gold")
# ## End(Not run)