# British Symbol Set for Therion. Developed by Footleg, from a set of examples 
# by Bruce Mutton taken from the Therion wiki.

layout GB_Std

    #type of used symbol sets SKBB/UIS/ASF/AUT/CCNP
    #setting this over-rides the metacode symbol swap done above!
    #symbol-set AUT

  scale-bar 100 m  
  grid-size 100 100 100 metres  # coordinate grid

  #Adopt passage slope 'fat triangle arrows' in favour of default skinny arrows
  #symbol-assign line gradient BCRA
  #symbol-assign point gradient BCRA

    #resolution of final map
    scale 1 500
    
    #position of header
    #map-header 20 20 e
    
    #transparency on
    #opacity 70
    
    # names of persons which surveyed the cave will be added how much they surveyed
    #statistics topo-length on
    
    # the language of legends in map
    #language en_UK
    
    #show the legend
    legend on
      
    #don't display survey centreline
    #symbol-hide group cave-centreline
	
    #hide line survey symbol
    symbol-hide line survey

    #hide passage height symbol
    symbol-hide point passage-height

	copy CustomisedSymbols
	
	copy WaterShading #Required for colour and b&w shading and colouuring of water fills and symbols
	
endlayout

layout WaterShading
  #Patterns similar to standard definition of pattern_water_UIS and pattern_sump_UIS
  #Gives b&w shaded symbols with borders, unless custom colours are defined
  #in which case colour backgrounds defined in LayoutColourSymbols are used
  code metapost
  beginpattern(pattern_water);
      draw origin--10up withpen pensquare scaled (0.03u); % line thickness
      patternxstep(.3u);                                 % spacing
      patterntransform(identity rotated 45);
  endpattern;
  
  beginpattern(pattern_sump);
      draw origin--(0,.3u) withpen pensquare scaled (0.03u);
      draw origin--(.3u,0) withpen pensquare scaled (0.03u);
      patterntransform(identity rotated 45);	
  endpattern;
  
  def p_water (expr pos,theta,sc,al)=
  %Bruce Mutton 2010.06.20 for Therion 5.3.8
      U:=(.425u,.3u);
      T:=identity aligned al rotated theta scaled sc shifted pos;
      pickup PenD;
      p:=fullcircle xscaled (1.2u) yscaled (0.8u) randomized (0.1u) rotated uniformdeviate (-45);
      if known colour_water_bg: thfill p withcolor colour_water_bg; else: thfill p withcolor white; fi; 
      thfill p withpattern pattern_water; %%% withcolor black;  %but with failed attempt at black hatch
      thdraw p;   %outline
      enddef; 
  
  def a_water (expr Path) =
  %Bruce Mutton 2010.06.20 for Therion 5.3.8
    T:=identity;
    thclean Path;
    pickup PenD;
    if known colour_water_bg: thfill Path withcolor colour_water_bg; else: thfill Path withcolor white; fi; 
    thfill Path withpattern pattern_water;  
    %%thdraw Path;  %outline, not needed as area drawn is defined by line border anyway
     %and border can be made invisible with subtype invisible where water meets sump in elevation
  enddef;
  
  def a_sump (expr Path) =
  %Bruce Mutton 2010.06.20 for Therion 5.3.8
    T:=identity;
    thclean Path;
    pickup PenD;
    if known colour_sump_bg:  thfill Path withcolor colour_sump_bg; else: thfill Path withcolor 0.7white; fi;
    thfill Path withpattern pattern_sump;  
    %%thdraw Path;  %outline, not needed as area drawn is defined by line border anyway
     %and border can be made invisible with subtype invisible where water meets sump in elevation
  enddef;
  endcode
endlayout WaterShading

layout LayoutColourSymbols
  #Still experimental (Dec 2011) and as per the comments in the code below, many of the default 
  #'symbol-colour' statements do not work as I would like.  The custom metapost 
  #components work fine however.
  
  #affects colour symbol linework but not labels and not fills
  	
  	symbol-colour point station [54 7 60]	#purple[54 7 60] #seems to affect +s, flag symbols and station text
  	
  	#survey cave
  	symbol-colour group cave-centreline [35 16 16] # brown [35 16 16] # red brown [50 0 0]
  	symbol-colour point cave-station [35 16 16]  #ineffective?
  	#symbol-colour point station-name [0 100 0]	
  	
  	#survey surface
  	symbol-colour group surface-centreline [54 74 29] # green [54 74 29]
  	symbol-colour point surface-station [54 74 29]  #ineffective?
  	symbol-colour point flag:entrance [54 74 29]  #ineffective?
  	
  	#magenta
  	symbol-colour group equipment  [80 0 40] # magenta [80 0 40]
  	
  	#dark blue
  	# symbol-colour group water  [22 22 95] # this breaks custom water definitions
  	symbol-colour point water-flow  [22 22 95]
  	symbol-colour line water-flow  [22 22 95]	
  	symbol-colour point water [22 22 95]	    # inconsistent?
  	# symbol-colour area sump [22 22 95]	# this breaks custom water definitions
  
  	#light blue	
  	# symbol-colour area water [86 100 100]	# this breaks custom water definitions
  	
  	#define colours for redefined water point & area
  	code metapost  
  	  %these colours affect fills, not the linework
  		!color colour_water_bg; %! forces interpretation as metapost
  		colour_water_bg := (0.86,1,1);      %light blue
  		!color colour_sump_bg;  %! forces interpretation as metapost
  		colour_sump_bg := (.22,.22,.95);    %dark blue
  	
      %these colours affect the linework	
  		!color colour_rope;  %! forces interpretation as metapost
  		colour_rope :=  (0.35,0.75,1.0);    %blue	
  		
  	  %this colour for entrance symbol (not point station flag entrance)
  		!color colour_entrance;  %! forces interpretation as metapost
  		colour_entrance :=  (0.54,0.74,0.29);  		
    endcode
	  
    colour map-fg [97 86 38] # yellow brown
    colour-legend on
endlayout LayoutColourSymbols
  
layout CustomisedSymbols
  code metapost
	%Bruce Mutton 2010.06.20, after original author Georg Pacher
	%for Therion 5.3.8
	beginpattern(pattern_sand);
		pickup PenC;
		p:= origin -- (0.01u,0.01u);
		for i=0.0u step 0.5u until 2.5u:  %AUT is step 0.2u 
		  for j=0.0u step 0.5u until 2.5u:  %AUT is step 0.2u 
			draw p rotated uniformdeviate(360) 
			 shifted ((i,j) randomized 0.4u);  %%AUT is 0.09u
		  endfor;
		endfor;
		if BaseScale<=2.5:
			my_step:=2.6u;  %mystep controls tessilation pattern, must synchronise with i, j above, was 2.4u
		else:
			my_step:=2.8u;  %was 2.6u
		fi;
		patternstep(my_step,my_step);       
	endpattern;

	def a_sand (expr Path) =
		T:=identity;
		%thclean Path; %makes passage colour more intense under area, not good for sand
		thfill Path withpattern pattern_sand ;
	enddef;

	beginpattern(pattern_pebbles);
		pickup PenC;
		path qq;
		for i=0.0u step 0.6u until 5.1u:
			for j=0.0u step 0.6u until 5.1u:
			  qq := (superellipse((.05u,0),(0,.05u),(-.05u,0),(0,.-.05u),.75))
				 randomized (u/45)
				 scaled (uniformdeviate(1.2)+.55)
				 rotated uniformdeviate(360) 
				 shifted ((i,j) randomized 0.55u);
			   draw qq;
			endfor;
		endfor;
		patternstep(5.1u,5.1u);
	endpattern;

	def a_pebbles (expr p) =
		T:=identity;
		thfill p withpattern pattern_pebbles;
	enddef;

	beginpattern(pattern_mud);
		pickup PenC;
		p:=(.0u,.0u) -- (0.25u,.0u);
		for i=0.0u step 0.6u until 5.4u:
			for j=0.0u step 0.6u until 5.4u:
				draw p shifted ((i,j) randomized 0.2u);
				draw p shifted ((i+.3u,j+.3u) randomized 0.2u);
			endfor;
		endfor;
		patternstep(5.4u,5.4u);
	endpattern;

	def a_clay (expr p) =
		T:=identity;
		thfill p withpattern pattern_mud;
	enddef;

	def p_slopearrow(expr pos,theta,sc,al)=
		U:=(.15u,.75u);
		T:=identity aligned al rotated theta scaled sc shifted pos;
		thfill (-.15u,0)--(0,.75u)--(.15u,0)--cycle;
	enddef;

	def p_flowstone_GB (expr pos,theta,sc,al)=
		U:=(.13u,.1u);
		T:=identity aligned al rotated theta scaled sc shifted pos;
		pickup PenC;
		p := ((-.13u,.1u){dir 60}..{dir -60}(.13u,.1u));
		thdraw p shifted (.25u,-.12u);
		thdraw p shifted (-.25u,-.12u);
		thdraw p shifted (0,.12u);
	enddef;
	

  def s_scalebar (expr l, units, txt) =
    begingroup
      interim warningcheck:=0;
      tmpl:=l / Scale * cm * units / 2;
      tmpx:=l / Scale * cm * units / 5;
      tmph:=5bp; % bar height
    endgroup;
    pickup PenC;
    #Adjusted to make lines not stick out: 0.25*u/10,0 is half thickness of PenC (Andrew Atkinson)
    draw (-tmpl+0.25*u/10,0)--(tmpl-0.25*u/10,0);
    draw (tmpl-0.25*u/10,-tmph)--(-tmpl+0.25*u/10,-tmph);    p:=(0,0)--(tmpx,0)--(tmpx,-tmph)--(0,-tmph)--cycle;
    for i:=-2.5 step 2 until 2:
      fill p shifted (i * tmpx,0);
    endfor;
    begingroup
      interim labeloffset:=3.5bp;
      for i:=0 step (l/5) until (l-1):
        tmpx:=tmpl * (i * 2 / l - 1);
        label.bot(thTEX(decimal (i)),(tmpx,-tmph));
      endfor;
      label.bot(thTEX(decimal (l) & "\thinspace" & txt),(tmpl,-tmph));
      label.top(thTEX("Scale 1 : " & decimal round(Scale*100)),(0,0));
    endgroup;
  enddef;
  
  def l_rockborder (expr p) =
    if abs(llcorner p - urcorner p) > u:
      l_rockborder_UIS(p);
    fi;
  enddef;
  
  def l_rockedge (expr p) =
    if abs(llcorner p - urcorner p) > u:
      l_rockedge_UIS(p);
    fi;
  enddef;
  
	let a_debris = a_debris_AUT;
	let p_debris = p_debris_AUT;
	let l_wall_debris = l_wall_debris_AUT;
	let a_blocks = a_blocks_AUT;
	let p_blocks = p_blocks_AUT;
	let l_wall_blocks = l_wall_blocks_AUT;
	let p_gradient = p_slopearrow;
	let p_flowstone = p_flowstone_GB;
	
  endcode
endlayout CustomisedSymbols

layout Mat_4Vall

    #resolution of final map
    scale 1 500
    
    #position of header
    map-header 20 20 e
    
    #color of final map.
    color map-bg 85 # dle barvy [100 100 100]
    
    #color by altitude
    color map-fg altitude
    code metapost
      let p_gradient = p_entrance;
    endcode
    
    #type of used symbol sets SKBB/UIS/ASF/CCNP
    #symbol-set UIS
    
    #to show the names of surveying points 
    #debug station-names
    
    #setup of grid
    grid bottom
    grid-size 50 50 50 m

endlayout