Rpdb (version 2.3.4)

mirror: Reflexion of Atomic Coordinates

Description

Perform a reflexion (or mirror) operation on atomic coordinates with respect to a given reflexion plane.

Usage

mirror(...)
# S3 method for coords
mirror(x, p1, p2 = NULL, p3 = NULL, mask = TRUE, cryst1 = NULL, ...)
# S3 method for pdb
mirror(x, p1, p2 = NULL, p3 = NULL, mask = TRUE, cryst1 = x$cryst1, ...)

Value

An object of the same class as x with reflected coordinates.

Arguments

...

further arguments passed to or from other methods.

x

an R object containing atomic coordinates.

p1

a numeric vector of length 3 containing the coordinates of the first point defining the reflexion plan. Can also be a 3x3 matrix or data.frame containing by row p1, p2 and p3.

p2

a numeric vector of length 3 containing the coordinates of the second point defining the reflexion plane.

p3

a numeric vector of length 3 containing the coordinates of the third point defining the reflexion plane.

mask

a logical vector indicating the set of coordinates to which to apply the reflexion.

cryst1

an object of class ‘cryst1’ use to convert fractional into Cartesian coordinates when need.

Details

mirror is a generic function. Method for objects of class ‘coords’ first convert the coordinates into Cartesian coordinates using cryst1 if needed. Once reflected, the coordinates are reconverted back to the orginal basis set using again cryst1. Method for objects of class ‘pdb’ first extract coordinates from the object using the function coords, perform the reflection, and update the coordinates of the ‘pdb’ object using the function coords<-.

See Also

Helper functions for reflection with respect to a given Cartesian plane or a plane defined by two lattice vectors:
Mxy, Myz, Mzx, Mab, Mbc, Mca
Passing from Cartesian to fractional coordinates (or Vis Versa):
xyz2abc, abc2xyz

Examples

# First lets read a pdb file
x <- read.pdb(system.file("examples/PCBM_ODCB.pdb", package="Rpdb"))
cell <- cell.coords(x)
visualize(x, mode = NULL)

# Mirror operation with respect to the ab-plane
visualize(mirror(x, rep(0,3), p1=cell[, "a"], p2=cell[, "b"]), mode = NULL)
# Mirror operation with respect to the ab-plane for residue 1
visualize(mirror(x, rep(0,3), p1=cell[, "a"], p2=cell[, "b"],
   mask = x$atoms$resid == 1), mode = NULL)