28th 'shape' file for CPO3D, all types of triangles

Leading lines, with 'comments':

triangle ***flat

str -triangle on sphere ***sphere

ctr -triangle on a cone ***cyl

ctr -triangle on a cone ***con

est -end spherical triangle ***end sph

ect -end con or cyl triangle ***end cyl

ect -end con or cyl triangle ***end con

edt -end disc triangle ***end disc

triangle ***flat, thin

est -end spherical triangle ***end sph, thin

ect -end con or cyl triangle ***end cyl, thin

ect -end con or cyl triangle ***end con, thin

ect -end con or cyl triangle ***end con, thin

edt -end disc triangle ***end disc, thin

'end con, thin' occurs twice, for 2 neighbouring electrodes, in order to simulate a more visible part of a cone. It becomes even more visible if

the x=0 and y=0 reflection planes are used. Note also that for these electrodes the geodesic nearly moves outside the defined boundary planes

(and in fact it does move outside if the 2 triangles are made thinner).

Note the method of subdivision of the thin triangles: it tends to be different from the more regular method for triangles that are not thin, where successive bisection of the longest side is used.