contour.tcl

This example shows how to build surface using contours. In this example 3 different contours were used. Two of them were (cntr_big_circle, cntr_center) approximated by resulting surface. Another one (cntr_big_circle) was used to modify completer gridding rule with weight.

See also:

contour, contour_add, completer

Here is the image of the resulting surface:

Pic 1. Surface built from contours

This result was obtained with "examples/surfit/curvs/contour.tcl" script.

#
# This script was generated with funner v2.1beta (www.gridding.info)

# 
# load plugins
# 
load libsurfit[info sharedlibextension]

# remove all previous data and gridding rules
clear_data 

# set name of surface
set map_name "map_cntr" 

# set solver
set_solver "cg" 

# set tolerance for solver
set tol 1e-005 

##
## load initial data 
##
 
# load contour from text file 
cntr_read "cntr_small_circle.xyz" "cntr_small_circle"  
 
# load contour from text file 
cntr_read "cntr1.xyz" "cntr1"  
 
# load contour from text file 
cntr_read "cntr2.xyz" "cntr2"  
 
# load contour from text file 
cntr_read "cntr_big_circle.xyz" "cntr_big_circle"  
 
# load contour from text file 
cntr_read "cntr_center.xyz" "cntr_center"  
 
##
## construct grid 
##
grid_get -1000 1000 20 -1000 1000 20 
 
##
## create gridding rules
##

# resulting surface at contour = contour values 
contour "cntr_small_circle" 

# resulting surface at contour = contour values 
contour "cntr_center" 

# resulting surface should tend to be constant or plane 
completer 

# add "resulting surface at contour = contour values" with weight 
contour_add 0.5 "cntr_big_circle" 

##
## run gridding algorithm
##
surfit 

##
## save results 
##

# unload grid from memory
grid_unload 

# save surface to surfit datafile 
surf_save "contour.dat" "map_cntr" 

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surfit: open source gridding and contouring software.