[r163] Expression distance wrong

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Post » Thu Feb 27, 2014 6:10 pm

Problem Description
Unless the distance expression shouldn't give back the distance between two points, I think this expressions result ist wrong.

Code: Select all
round(distance(Pos1.X, Pos2.X, Pos1.Y,Pos2.Y))


compared to

Code: Select all
round(sqrt(abs(Pos1.X - Pos2.X)^2 + abs(Pos1.Y - Pos2.Y)^2))


This - IMHO correct way to calculate the distance - gives a very different result using the distance expression.

Operating System and Service Pack
Win7 SVP3

Construct 2 Version ID
163
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Post » Thu Feb 27, 2014 6:24 pm

Not a bug.
The correct way to use the distance function is:
Code: Select all
distance(Pos1.X, Pos1.Y, Pos2.X, Pos2.Y)

Notice the x,y pairs are next to each other.

It's exactly the same as:
Code: Select all
sqrt((Pos2.X - Pos1.X)^2 + (Pos2.Y - Pos1.Y)^2)

or
Code: Select all
sqrt((Pos1.X - Pos2.X)^2 + (Pos1.Y - Pos2.Y)^2)


The abs() isn't needed since any number squared is always positive.
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Post » Thu Feb 27, 2014 6:52 pm

Ahh, my bad, sorry, sorry, sorry -> ashamed in the leftmost corner.... (the eyes, old eyes, small screen, high resolution ;))

Thanks R0J0hound. I'll try to delete or let this thread delete.
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