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tdsetp

Sets TDPACK parameter values.

Available in version 4.3.1 and later.

Prototype

	procedure tdsetp (
		pnam [1] : string,  
		pval                
	)

Arguments

pnam

Name of the parameter you want to set.

pval

Value of the parameter you want to set; this value must be of the type appropriate to the parameter being set.

Description

The tdsetp procedure sets internal parameters for selected TDPACK routines.

This routine is part of the low-level TDPACK package, which is a group of Fortran and C callable routines for projecting objects from a 3-dimensional coordinate system having U, V, and W axes to a 2-dimensional projection plane having X and Y axes and/or for drawing the projections of those objects. This can be referred to somewhat loosely as "drawing objects in three dimensions".

Please see the documentation on parameter access routines for a full description of the parameters you can set and retrieve.

Examples

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"

; 
; Function for generating random data.
;
function dsrnd1(ifrst,nextn)
begin
  MPLIER = 16807
  MODLUS = 2147483647
  MOBYMP = 127773
  MOMDMP = 2836
  JSEED  = 123456789

  if (ifrst .eq. 0) then
    nextn = JSEED
    ifrst = 1
  end if

  hvlue = nextn / MOBYMP
  lvlue = nextn % MOBYMP
  testv = MPLIER*lvlue - MOMDMP*hvlue

  if (testv .gt. 0) then
    nextn = testv
  else
    nextn = testv + MODLUS
 end if

  return((1.*nextn)/(1.*MODLUS))
end


begin
 N        = 1331
 NEAREST  =  500
 MTRI     = 150000
 NFARTHER = N - NEAREST

;
; Create our input and work arrays.
;
  x = new(N,float)
  y = new(N,float)
  z = new(N,float)
  rtri = new((/MTRI,10/),float)
  rtwk = new((/MTRI,2/),float)

;
; Fill up the dummy input arrays.
;
  ifrst = 0
  nextn = 0
  do i = 0,N-1
    x(i) = dsrnd1(ifrst,nextn)    
    y(i) = dsrnd1(ifrst,nextn)
    z(i) = dsrnd1(ifrst,nextn)    
  end do

;
;  Specify the reference point from which we want to find the NEAREST
;  nearest points.
;
  px = 0.5
  py = 0.5
  pz = 0.5

  wks = gsn_open_wks("ps","scatter")  

;
; Set some TDPACK parameters and initialize. These four are viewport
; specifiers.
;
  tdsetp("VPB", 0.09)
  tdsetp("VPT", 0.99)
  tdsetp("VPL", 0.11)
  tdsetp("VPR", 1.00)

  tdinit((/4.6, 3.0, 3.3/), (/0.5, 0.5, 0.5/), (/0.5, 0.5, 2.7/), 0.)

;
;  Set up some colors using the standard TDPACK entry for that.
;
  tdclrs(wks, 1, 0., 0.8, 8, 37, 8)

;
;  Define style indices for shades of gray, green, and red.
;
  tdstrs(1,  8, 37,   8,  37, 1, 1, 0, 0.05, 0.05, 0.)
  tdstrs(3,  8, 37,  68,  97, 1, 1, 0, 0.05, 0.05, 0.)
  tdstrs(4,  8, 37,  98, 127, 1, 1, 0, 0.05, 0.05, 0.)

;
;  Store the indices of the nearest points in npts and the complement
;  of that set (with respect to the entire input dataset) in mpts.
;
  npts = new(NEAREST,integer)
  mpts = new(NFARTHER,integer)

  npts(0) = shgetnp(px,py,pz,x,y,z,0)
  do i=2,N
    if (i .le. NEAREST) then
      npts(i-1) = shgetnp(px,py,pz,x,y,z,1)
    else
      mpts(i-1-NEAREST) = shgetnp(px,py,pz,x,y,z,1)
    end if
  end do

;
;  Plot the near points in green.
;
  ntri = 0
  dotsize = 0.02
  do i = 0, NEAREST-1
    tdmtri(-5, (/x(npts(i)-1), y(npts(i)-1), z(npts(i)-1)/), dotsize, \
           rtri, ntri, 4, (/0.,0.,0./),(/1.,1.,1./))
  end do

;
;  Plot the farther points in gray.
;
  do i = 0, NFARTHER-1
    tdmtri(-5, (/x(mpts(i)), y(mpts(i)), z(mpts(i))/), dotsize, \
           rtri, ntri, 1, (/0.,0.,0./),(/1.,1.,1./));
  end do

;
;  Mark the reference point in red.
;
  tdmtri(-5,(/px,py,pz/),1.2*dotsize,rtri,ntri,3,(/0.,0.,0./),(/1.,1.,1./))

;
;  Order and draw triangles.
;
  itwk = tdotri(rtri, ntri, rtwk, 0)
  tddtri(wks,rtri, ntri, itwk)

;
;  Draw a box around the perimeter.
;
  tdgrds(wks,(/0., 1., 0./), (/1., 0., 1./), (/-1., -1., -1./),11,0)
  tdgrds(wks,(/0., 1., 0./), (/1., 0., 1./), (/-1., -1., -1./),11,1)

  frame(wks)

end

Also, see the examples on the three-dimensional graphics applications page.

tdsetp

Prototype

Arguments

Description

See Also

Examples