2D/3D Distance

[AuRules]

Do anyone have a good explanation of the difference between 2D & 3D distance. I hit the F1 key and read the definition. But maybe it's me or I just not seeing it the way it explains...


Here's my explanation from a line to a circle

2D- goes from circle (centroid) to line (centroid) reference in the workplane.
3D- goes from circle (centroid) straight to line (perpendicular to line) reference into no workplane.

[Matthew D. Hoedeman]

Do anyone have a good explanation of the difference between 2D & 3D distance. I hit the F1 key and read the definition. But maybe it's me or I just not seeing it the way it explains...


Here's my explanation from a line to a circle

2D- goes from circle (centroid) to line (centroid) reference in the workplane.
3D- goes from circle (centroid) straight to line (perpendicular to line) reference into no workplane.

2-D distance is the shortest distance between 2 points, ONLY using 2 axis, the workplane axis difference is NOT included, basically, projecting the 2 points into the workplane, then getting the distance between them, the old right triangle calculation~ sqrt (x-diff^ + y-diff^2) when in the z workplane.

3-D distance is the shortest distance between 2 points using all 3 axis, or the definition of the radius of a sphere~ sqrt (x-diff^2 + y-diff^2 + z-diff^2)

[craiger_ny]

The shortest distance between two points is a straight line, in the opposite direction Danny.

[Matthew D. Hoedeman]

The shortest distance between two points is a straight line, in the opposite direction Danny.

Only in ONE model of the universe though.

[craiger_ny]

It's from a movie..........

[Matthew D. Hoedeman]

It's from a movie..........

Really?!

Gee, I WONDER what movie it could be from. I guess I'll have to think about it while I play golf this afternoon.
(Cinderella kid)

[John Kingston]

Caddyshack

Missed Matt's post before sending mine.

[Don Henger]

[QUOTE=AuRules;60840]QUOTE]

Is it smokey in Colombus Ga. from the fires down there????

[cmmguy]

[QUOTE=Don Henger;60905]

QUOTE]

Is it smokey in Colombus Ga. from the fires down there????

It was smokey here in NC yesterday, but it blew out last night.

[#2#]

Do anyone have a good explanation of the difference between 2D & 3D distance. I hit the F1 key and read the definition. But maybe it's me or I just not seeing it the way it explains...


Here's my explanation from a line to a circle

2D- goes from circle (centroid) to line (centroid) reference in the workplane.
3D- goes from circle (centroid) straight to line (perpendicular to line) reference into no workplane.

I believe either 2D or 3D will go centroid to centroid.

So, for 2D if you have a circle at 0,0, and a line that runs from 0,4,0 to 2,4,2 and you do a 2d distance in the z-plus workplane between the two you are going to get the distance from 0,0 to 1,4.

For 3D, if you have a circle at 0,0,0 and a line that runs from 0,4,0 to 2,4,2 and you do a 3d distance in any workplane between the two you are going to get the distance from 0,0,0 to 1,4,1.

Does that make sense?

[#2#]

[QUOTE=Don Henger;60905]

QUOTE]

Is it smokey in Colombus Ga. from the fires down there????

It was smokey in the Twin Cities on Monday from the fire up on the Canadian border - 250 miles away!

[AuRules]

Thanks