https://ja.wikipedia.org/wiki/ブレゼンハムのアルゴリズム
function breseham_line clear all; close all; figure(); xlim([0,5]); ylim([0,5]); hold on; drawline(1,3,1,3); function drawline(x0, x1, y0, y1) deltax = x1 - x0 deltay = y1 - y0 error = 0; deltaerr = abs (deltay / deltax); y = y0; d=deltax/20; for x=x0:d:x1 plot(x,y,'bo'); error = error + deltaerr; if error > 0.5 y = y + d; error = error - d; end end end end