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Harris Geospatial / Docs Center / Using IDL / Translate Method

IDL

Translate Method

Translate Method

The Translate method moves or translates a graphic item in the X, Y, or Z dimensions.

Example


; Create the data.
x = FINDGEN(100)
y = 20 * Sin(x*2*!PI/25.0) * Exp(-0.01*x)
 
; Draw the sky and sea.
p = PLOT(x, y, XRANGE=[0,99], YRANGE=[-40,100], $
   FILL_LEVEL=-40, $
   AXIS_STYLE=0, MARGIN=0, DIMENSIONS=[500,400], $
   BACKGROUND_COLOR="light sky blue", $
   /FILL_BACKGROUND, FILL_COLOR="sea green", TRANSPARENCY=100)
 
; Draw the sun
e = ELLIPSE(0.9, 1, FILL_COLOR="yellow", COLOR="yellow")
 
; Determine the points for the boat to travel.
xx = 0.5*[-22,-19,-12,-7,8,13,18,23,0.5,0.5, $
   13,8,0.5,0.5,8,3,-2,-7,0,0,-7,-12,0,0]
 
yy = 2*[3,-0.7,-1,-1.5,-1.5,-0.7,0.5,3,3,5, $
   5,13,13,15,15,20,20,15,15,13,13,5,5,3]
 
; Draw the boat. Give a Z value to put the boat on top.
p1 = POLYGON(xx,yy,1,/DATA,FILL_COLOR="burlywood", CLIP=0)
 
 
; Translate p1 using data coordinates,
; translate e using device coordinates.
FOR i=1,99 DO BEGIN & $
   p.SAVE, 'translatemethod_ex.gif', RES=96, /APPEND & $
   p1.TRANSLATE, 1, y[i]-y[i-1], /DATA & $
   e.TRANSLATE, 1,-0.5 & $
   ENDFOR
 
p.SAVE, 'translatemethod_ex.gif', RES=96, /APPEND, /CLOSE
 

Syntax


graphic.Translate, X, Y, Z [, /DATA] [, /DEVICE] [, /NORMAL] [, /RESET]

Arguments


X, Y, Z

The translation along the X, Y, and Z dimensions. A value of 0 indicates no translation. If Z is not supplied then the default is 0.

Keywords


DATA

Set this keyword if the input arguments are specified in data coordinates.

DEVICE

Set this keyword if the input arguments are specified in device coordinates (pixels). This is the default behavior.

NORMAL

Set this keyword if the input arguments are specified in normalized [0, 1] coordinates.

RESET

Set this keyword to 1 to reset the translation to 0 before performing any translation. If RESET is specified then X, Y, and Z are optional.

Version History


8.0

Introduced

See Also


Rotate Method, Scale Method



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