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xianggui7895

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£¨1£©VMDÄÚÖõÄpbctool¹¤¾ßÏ䣬¿ÉÖ±½ÓÔÚvmd¿ØÖÆÌ¨»òÕßTk¿ØÖÆÌ¨£¨Main menu->Extensions->Tk Console£©ÖÐÊäÈëÒÔÏÂÃüÁ

pbc set [list a b c alpha beta gamma]
pbc box -on

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pbc box -style lines|dashed|

pbc box -width 2

pbc box -color red



¸ü¶àÑ¡Ïî¿É²éÔÄ£ºhttp://www.ks.uiuc.edu/Research/vmd/plugins/pbctools/



£¨2£©tcl½Å±¾£ºvmd_draw_unitcell¡£½«ÏÂÃæÄÚÈݱ£´æÔÚÃûΪvmd_draw_unitcell.tclµÄÎļþ£¬·ÅÔÚvmd°²×°Ä¿Â¼Ï£¨È磺C:\Program Files\University of Illinois\VMD£©



# vmd extension procedure:
# provide a 'draw unitcell' command
#
# $Id: vmd_draw_unitcell.tcl,v 1.2 2005/01/11 13:05:12 akohlmey Exp $
# Time-stamp:
#
# Copyright (c) 2003-2005 by

# add a unitcell graphic to a molecule via a draw subcommand.
#
# options:
# cell (vmd|auto|[list ]), default: "vmd"
#          "vmd" will use the internal values,
#          "auto" will build an orthogonal unitcell from the result of
#           'measure minmax' plus 1 angstrom added in each direction.
#         else a list of a,b,c,alpha,beta,gamma will be assumed.
# origin ([list ]|auto), default: {0.0 0.0 0.0}, "auto" with 'cell auto'
# style: (lines|dashed|rod) default: line
# width: default: 1.0
# resolution:        default: 8
#

proc vmd_draw_unitcell {molid args} {

    # parse arguments
    foreach {flag arg} $args {
        switch $flag {
            cell       { set cell       "$arg" }
            origin     { set origin     "$arg" }
            style      { set style      "$arg" }
            width      { set width      "$arg" }
            resolution { set resolution "$arg" }
            default   { puts "unknown option: $flag"; return }
        }
    }

    if [info exists cell] {
        if {![info exists origin] && $cell == "auto"} { set origin auto }
    } else {
        set cell vmd
    }

    if ![info exists origin]      { set origin     {0.0 0.0 0.0} }
    if ![info exists style]       { set style       lines        }
    if ![info exists width]       { set width       1            }
    if ![info exists resolution] { set resolution 8            }
    # FIXME: add some checks on the arguments here.

    # handle auto keywords
    if {$cell == "auto" || $origin == "auto" } {
        set sel [atomselect $molid {all}]
        set minmax [measure minmax $sel]
        $sel delete
        unset sel

        if {$origin == "auto" } {set origin [vecsub [lindex $minmax 0] {1 1 1}]}
        if {$cell == "auto"} {
            set cell [vecadd [vecsub [lindex $minmax 1] [lindex $minmax 0]] {2 2 2}]
            lappend cell 90.0 90.0 90.0
        }
    }

    if {$cell == "vmd" } {set cell [molinfo $molid get {a b c alpha beta gamma}]}
    global M_PI
    set sa [expr sin([lindex $cell 3]/180.0*$M_PI)]
    set ca [expr cos([lindex $cell 3]/180.0*$M_PI)]
    set cb [expr cos([lindex $cell 4]/180.0*$M_PI)]
    set cg [expr cos([lindex $cell 5]/180.0*$M_PI)]
    set sg [expr sin([lindex $cell 5]/180.0*$M_PI)]

    # set up cell vectors according to the VMD unitcell conventions.
    # the a-vector is collinear with the x-axis and
    # the b-vector is in the xy-plane.
    set a [vecscale [lindex $cell 0] {1 0 0}]
    set b [vecscale [lindex $cell 1] "$ca $sa 0"]
    set c [vecscale [lindex $cell 2] "$cb [expr ($ca - $cb*$cg)/$sg] [expr sqrt((1.0 + 2.0*$ca*$cb*$cg - $ca*$ca - $cb*$cb - $cg*$cg)/(1.0 - $cg*$cg))]"]

    # set up cell vertices
    set vert(0) $origin
    set vert(1) [vecadd $origin $a]
    set vert(2) [vecadd $origin $b]
    set vert(3) [vecadd $origin $a $b]
    set vert(4) [vecadd $origin $c]
    set vert(5) [vecadd $origin $a $c]
    set vert(6) [vecadd $origin $b $c]
    set vert(7) [vecadd $origin $a $b $c]
    unset sa ca cb cg sg

    set gid ""
    switch $style {
        rod {
            # set size and radius of spheres and cylinders
            set srad [expr $width * 0.003 * [veclength [vecadd $a $b $c]]]
            set crad [expr 0.99 * $srad]

            # draw spheres into the vertices ...
            for {set i 0} {$i < 8} {incr i} {
                lappend gid [graphics $molid sphere $vert($i) radius $srad resolution $resolution]
            }
            # ... and connect them with cylinders
            foreach {i j} {0 1 0 2 0 4 1 5 2 3 4 6 1 3 2 6 4 5 7 3 7 5 7 6} {
                lappend gid [graphics $molid cylinder $vert($i) $vert($j) radius $crad resolution $resolution]
            }
        }

        lines {
            set width [expr int($width + 0.5)]
            foreach {i j} {0 1 0 2 0 4 1 5 2 3 4 6 1 3 2 6 4 5 7 3 7 5 7 6} {
                lappend gid [graphics $molid line $vert($i) $vert($j) width $width style solid]
            }
        }

        dashed {
            set width [expr int($width + 0.5)]
            foreach {i j} {0 1 0 2 0 4 1 5 2 3 4 6 1 3 2 6 4 5 7 3 7 5 7 6} {
                lappend gid [graphics $molid line $vert($i) $vert($j) width $width style dashed]
            }
        }
        default { puts "unknown unitcell style: $style" ; return }
    }
    # return list of graphics indices so that they can be saved and deleted later.
    return $gid
}

############################################################
# Local Variables:
# mode: tcl
# time-stamp-format: "%u %02d.%02m.%y %02H:%02M:%02S %s"
# End:
############################################################



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source C:\\Program\ Files\ (x86)\\University\ of\ Illinois\\VMD\\vmd_draw_unitcell.tcl



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draw unitcell cell [list a b c alpha beta gamma]



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# cell (vmd|auto|[list ]), default: "vmd"
#          "vmd" will use the internal values,
#          "auto" will build an orthogonal unitcell from the result of
#           'measure minmax' plus 1 angstrom added in each direction.
#         else a list of a,b,c,alpha,beta,gamma will be assumed.
# origin ([list ]|auto), default: {0.0 0.0 0.0}, "auto" with 'cell auto'
# style: (lines|dashed|rod) default: line
# width: default: 1.0
# resolution:        default: 8

[ Last edited by xianggui7895 on 2010-12-13 at 21:57 ]
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