I have already done a hand rail in plan, due to being involved in surveying a show cave, been meaning to put it on the kiwi for a while now. This is one of my first attempts at symbol definition, (cannot remember what I adapted it from), probably very poor, but in case it can help. Steps would be wonderful, I have spent far too long trying to use a border to draw steps. The other one that vaguely crossed my mind was a point symbol for light, but I put it to the back of the list after very little time thanks Andrew def l_u_rail (expr P) = T:=identity; cas := 0; dlzka := arclength P; mojkrok:=adjust_step(dlzka, 0.8u); pickup PenC; forever: t0 := arctime (cas) of P; t1 := arctime (cas + mojkrok*2/5) of P; t := arctime (cas + mojkrok/2) of P; t4 := arctime (cas + mojkrok*3/5) of P; t5 := arctime (cas + mojkrok) of P; thdraw (subpath (t0,t1) of P); thdraw (subpath (t4,t5) of P); drawdot (point t of P); #mark_ (P,t,0.02u); #mark_ (P,t,-0.02u); #f := (P,t,0.2u); #draw f; cas := cas + mojkrok; exitif cas > dlzka - (2*mojkrok/3); % for rounding errors endfor; enddef; initsymbol("l_u_rail") #text en line u:rail "Railing" On 11/11/11 19:48, Stacho Mudrak wrote:
Hello everybody,
after drawing a complex map of one show cave, I would like to add new standard symbols to therion. These should include:
line edge - should be used to draw other then rock edges, e.g. wall structures in elevation. There is already rock-border -- rock-edge pair, there is general border symbol but no general edge symbol.
line rope - already discussed here, just line point option anchor on|off should work also
line handrail - this symbol already exists in some cave symbol sets. A line with dots in plan, in elevation some standard 1m tall handrail would be drawn.
point handrail - used to draw handrail in cross-sections
line steps - should be used in both, plan / elevation projections. In plan, this line would surround steps area and steps would be drawn parallel to the first line segment. In elevation, 20cm steps would be drawn.
line path - used to draw concrete or other path in caves, where it was built. If it will be closed curve, it will be filled with "area path". See below.
area path - fill for path areas. It would be automatically applied for closed line steps/path in plan projection.
Also should be added: line rope-ladder line fixed-ladder line via-ferrata point via-ferrata
Do these symbols make sense? Any comments? Any other symbols, that should exist in the standard therion library?
Thanks a lot for the feedback, S.
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