BBS: Inland Empire Archive Date: 06-22-92 (06:22) Number: 1212 From: RICHARD VANNOY Refer#: NONE To: ROBERT CHURCH Recvd: NO Subj: Distance Formula Conf: (2) Quik_Bas

RC>In short, How can I find all of the points between two points on RC>a grid? So the two points are 20, 30, 70, 130 x1 y1 x2 y2 What you're trying to lay out is called the ratio between the change in x (delta x) and the change in y (delta y). The ratio is (x2 - x1) / (y2 - y1) = (70 - 20) / (130 - 30) = 50 / 100 = 1/2 or .5 in other words for every unit x changes, y changes 2. (You can do (x1-x2)/(y1-y2) and the minuses and plusses will work right as long as you are consistant. So to compute the x,y points between, you do... ratio = (x2-x1)/(y2-y1) startx=x1 starty=y1FORi = 1 to x2 -x1 x = startx + i y = INT((starty+i)*ratio+.5)'.5 rounds y to the nearest whole numberNEXTi That will (if I got my math right), will give you the closest approximate (because you round off y) location of all the x,y intersections. Your "i" increment can also be set to just about any value you want. ___ > MegaMail 2.1b #0:Real programmers use: COPY CON PROGRAM.EXE --- Maximus 2.00 * Origin: D.J.M.BBS (1:202/307)

Echo Basic Postings

**Books at Amazon:**

Back to BASIC: The History, Corruption, and Future of the Language

Hackers: Heroes of the Computer Revolution (including Tiny BASIC)

Go to: The Story of the Math Majors, Bridge Players, Engineers, Chess Wizards, Scientists and Iconoclasts who were the Hero Programmers of the Software Revolution

The Advent of the Algorithm: The Idea that Rules the World

Moths in the Machine: The Power and Perils of Programming

Mastering Visual Basic .NET