line

fnvoid line(int x1, int y1, int x2, int y2) nothrow @nogc

Draws a line between two points.

Parameters

x1Start X coordinate
y1Start Y coordinate
x2End X coordinate
y2End Y coordinate Example: 
color(0, 0, 0);  // Black
line(0, 0, 100, 100);  // Diagonal line