Plan 9 from Bell Labs’s /usr/web/sources/plan9/sys/src/cmd/plot/libplot/dpoint.c
#include "mplot.h" void dpoint(double x, double y){ draw(screen, Rect(SCX(x), SCY(y), SCX(x)+1, SCY(y)+1), getcolor(e1->foregr), nil, ZP); move(x, y); }