[Therion] Really bad idea?

[Martin Sluka]

I just found a Metapost example generating color transition, so it should work:

http://www.ursoswald.ch/metapost/tutorial/Colors.html <http://www.ursoswald.ch/metapost/tutorial/Colors.html>

If you add this code to Metapost viewer ( http://www.tlhiv.org/mppreview/ <http://www.tlhiv.org/mppreview/> ), you may see it:

u:=25;                    % 25 = 25bp = 25 PostScript points = 30/72 in
wi:=10;                   % width  in units u   
he:=10;                   % height in units u
hoehe:=he*u;              % height
breite:=wi*u;             % width
pair P[], xy[];
path p[];
transform t;
color c[];
n:=20; rd:=0.2; b:=(wi-2rd)/4;

P0:=(0, 0);
t:=identity scaled u shifted P0;

  fill (0, 0)--(breite, 0)--(breite, hoehe)--(0, hoehe)--cycle withcolor .9white;
  draw (0, 0)--(breite, 0)--(breite, hoehe)--(0, hoehe)--cycle;
  
  for k=0 upto 3:
    blau:=.3333k;
    P1:=(rd, he-rd-b)+k*b*(1, -1);
    for i=0 upto n-1:
      for j=0 upto n-1:
	xy0:=P1+(i*b/n, j*b/n);
	p0:=xy0--(xy0+(b/n, 0))--(xy0+(b/n, b/n))--(xy0+(0, b/n))--cycle;
	c0:=((i+1)/n, (j+1)/n, blau);
	fill p0 transformed t withcolor c0;
      endfor
    endfor
    draw (P1--(P1+(b, 0))--(P1+(b, b))--(P1+(0,b))--cycle) transformed t;
    P2:=(P1+(0, b))transformed t;
    label.lrt("bluepart c", P2);
    label.lrt("="&decimal blau, P2+(0, -3mm));
    label.urt("latex2html version 2002 - 1", (0,0));   
  endfor 
  
endfig;

end




> 28. 6. 2016 v 21:57, Bruce Mutton <bruce at tomo.co.nz>:
> 
> I also am mildly frustrated that colours in plan do not match elevation. Your solution sounds like night mare to edit subsequently however.
> 
> Maybe better approach would be to work on a graded map-fg colour that changes appropriately based on altitude of nearby stations and maybe point altitude or dimensions for plan.
> And a simple gradation for elevations. 
> 
> To date i have been using similar approach to Footleg.
> 
> Bruce
> 
> Sent from my Samsung device, hence the typo's
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