The given Fortran subroutine approximates part of a conic by a sequence of straight line segments in order that the approximation can be drawn directly by an automatic graph plotter. The main purpose is to use few line segments subject to an accuracy parameter that is set by the user of the subroutine. All parts of the conic are drawn that are inside a given triangle. The conic is specified by function values at the vertices and at the mid-points of the sides of the triangle.
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