/usr/share/gnudatalanguage/lib/map_clip_set.pro is in libgnudatalanguage0 0.9.7-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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; NAME:
; MAP_CLIP_SET
;
;
; PURPOSE:
; Sets up the clipping/splitting pipeline for the projection
;
;
; CATEGORY:
; Map utilities
;
;
; CALLING SEQUENCE:
;
;
; INPUTS:
;
;
; OUTPUTS:
;
;
; MODIFICATION HISTORY:
; 25-Jul-2006 : written by JMG
; 2014: modified by GD
;
; LICENCE:
; Copyright (C) 2006, Joel M. Gales
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
;-
pro map_clip_set,map_structure=map_structure,$
reset=reset,split=split,clip_plane=clip_plane,$
transform=transform,clip_uv=clip_uv, show=show
on_error, 2
giveback=0
if (n_elements(map_structure) eq 0) then begin
map_structure=!map
giveback=1
endif
if (keyword_set(reset)) then begin
map_structure.pipeline=0.0
endif
if (keyword_set(transform)) then begin
i = 0
while (map_structure.pipeline[0,i] ne 0 and map_structure.pipeline[0,i] ne 3) do i = i + 1
if (i eq 11) then begin
message, 'Too many pipeline stages..'
endif else begin
map_structure.pipeline[0,i] = 3
endelse
endif
if (n_elements(split) ne 0) then begin
i = 0
while (map_structure.pipeline[0,i] ne 0 and map_structure.pipeline[0,i] ne 3) do i = i + 1
if (i eq 11) then begin
message, 'Too many pipeline stages..'
endif else begin
; print,"split=",split
map_structure.pipeline[0,i+1] = 3
map_structure.pipeline[0,i] = 1
map_structure.pipeline[1,i] = -1*split[2]
map_structure.pipeline[2,i] = -1*split[3]
map_structure.pipeline[3,i] = -1*split[4]
map_structure.pipeline[4,i] = -1*split[5]
lon=split[0]*!DTOR & lat=split[1]*!DTOR
x = cos(lon) * cos(lat) & y = sin(lon) * cos(lat) &z = sin(lat)
map_structure.pipeline[5,i] = x
map_structure.pipeline[6,i] = y
map_structure.pipeline[7,i] = z
endelse
endif
if (n_elements(clip_plane) ne 0) then begin
i = 0
while (map_structure.pipeline[0,i] ne 0 and map_structure.pipeline[0,i] ne 3) do i = i + 1
if (i eq 11) then begin
message, 'Too many pipeline stages..'
endif else begin
; print,"clip_plane=",clip_plane
map_structure.pipeline[0,i+1] = 3
map_structure.pipeline[0,i] = 2
f = sqrt(clip_plane[0]^2 + clip_plane[1]^2 + clip_plane[2]^2)
if (f eq 0) then f = 1
map_structure.pipeline[1,i] = clip_plane[0] / f
map_structure.pipeline[2,i] = clip_plane[1] / f
map_structure.pipeline[3,i] = clip_plane[2] / f
map_structure.pipeline[4,i] = clip_plane[3] / f
endelse
endif
if (n_elements(clip_uv) ne 0) then begin
i = 0
while (map_structure.pipeline[0,i] ne 3 and i lt 11) do i = i + 1
if (i eq 11) then begin
map_structure.pipeline[0,0] = 3
map_structure.pipeline[0,1] = 4
map_structure.pipeline[1,1] = clip_uv[0]
map_structure.pipeline[2,1] = clip_uv[1]
map_structure.pipeline[3,1] = clip_uv[2]
map_structure.pipeline[4,1] = clip_uv[3]
endif else begin
map_structure.pipeline[0,i+1] = 4
map_structure.pipeline[1,i+1] = clip_uv[0]
map_structure.pipeline[2,i+1] = clip_uv[1]
map_structure.pipeline[3,i+1] = clip_uv[2]
map_structure.pipeline[4,i+1] = clip_uv[3]
endelse
endif
if (keyword_set(show)) then begin
i=0
while(map_structure.pipeline[0,i] ne 0) do begin
a=float(map_structure.pipeline[1,i])
b=float(map_structure.pipeline[2,i])
c=float(map_structure.pipeline[3,i])
d=float(map_structure.pipeline[4,i])
case fix(map_structure.pipeline[0,i]) of
1: print,"PIPELINE_SPLIT",a,b,c,d
2: print,"PIPELINE_PLANE",a,b,c,d
3: print,"PIPELINE_TRANS",a,b,c,d
4: print,"PIPELINE_UVBOX",a,b,c,d
endcase
i++
endwhile
endif
if (giveback eq 1) then !map=map_structure
return
end
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