calculating coordinate points with VB.net

I am trying to build a coordinates system but am having trouble with how to..

What I have sofar is a textbox that allows the user to enter a length. This length is user defined but never smaller then 610 in length since this is the minimum unit size we use to build timber frames. The overall length of a timber frame is infinite (well not really, but it is for what I want) the timber frame has beams every 610mm set apart from each other (this is a legal requirement) so I want my vb.net to set coordinates for each beam at intervals of 610 then write that coordinates system to a text based *.SCR file

AutoCAD uses the script file to automate drawing procedures to draw a beam of 180mm x 50mmx 50mm

BOX…. This emplys the AutoCAD tool needed for uses
0,0,0…This emplys a starting or base point
180,50,50…this is the end point that completes the beam

As you can see the script is very basic lets say I want a frame and in my textbox I type 1260 I know that my beams would look like the following in the script

Box
0,0,0
180,50,50
Box
0,660,0
180,660,50
Box
0,710,0
180,760,50
Box
0,810,0
180,860,0
Box
0,910,0
180,960,50
Box
0,1110,0
180,1160,50
Box
0,1210,0
1开发者_如何学Go80,1260,50

I need to build a new reference point each time from building of the previous, all these coordinates need to be worked out in VB.net and then recorded to the text based *scr file

How can I achieve this? I was pointedout towards the direction of arrays but doubt that???

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the algorithm isn't clear. see the increments at each step: Box 0,0,0 180,50,50 Box 0,660,0 + 660 180,660,50 + 610 Box 0,710,0 + 50 180,760,50 + 100