#include "line.h" void DrawLine(Point *a, Point *b, int colour) { register int dx, dy, k1, k2, d, x, y, x1; dx = b->x - a->x; dy = b->y - a->y; d = (dy << 1) - dx; k1 = dy << 1; k2 = (dy - dx) << 1; x = a->x; y = a->y; x1 = b->x; PutPixel(x, y, colour); while (x < x1) { if (d <= 0) { d += k1; x++; } else { d += k2; x++; y++; } PutPixel(x, y, colour); } }