Assignment 03:
 Smart Connection Device

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This AutoLisp file takes an input of two lines. Type device and select two lines that you would like to build a staircase between. For parallel lines it constructs a single or double run staircase of usable dimensions. For skew lines it should generate a spiral staircase but this has only been partially implemented and does work. Lines that intersect in 3D space cannot have a staircase built between them. coordinates of the test lines shown: 1) ( (0,0,0) (0,1,0) ) & ( (4,0,12) (4,1,12) ) 2) ( (10,0,0) (10,1,0) ) & ( (10,0,27) (10,1,27) ) 3) ( (20,0,0) (20,1,0) ) & ( (30,0,6) (30,1,6) ) 4) ( (4,15,10) (4,16,10) ) & ( (0,15,0) (0,16,0) )