Diameter instead of radius

ipsketchpi

Hi

There are no silly questions:)

These tease me all the time. When I draw circle with standard SU circle tool I must write radius, but I would like to write in diameter. Is it possible?

Diameter instead of radius.PNG

TIG

No, but the radius is always half the diameter
However there are 'alternative' ways to draw circles [and arcs etc] - see 2dTools - here you get the circle-through-3-points, circle-by-center-radius and circle-by-start-diameter etc

pilou

Take a look to this post

Gaieus

@tig said:

No, but the radius is always half the diameter

So you can always enter diameter/2 into the Measurement box...

@unknownuser said:

Take a look to this post

Therefore no need for any plugin at all...

ArCAD-UK

@gaieus said:

So you can always enter diameter/2 into the Measurement box...
Therefore no need for any plugin at all...

Thought I was having a Doh moment but this only seems to work with the division operator. I was beginning to think we had a discrete calculator available

Gaieus

Yes, Pilou, but that was not the question on one hand and again, we are in the Newbie forum on the other so let's keep it simple at the beginning...

pilou

@unknownuser said:

Therefore no need for any plugin at all

Yes but how you draw a circle between 2 objects ? (in the easy case horizontal or vertical)
You must first draw a line for have the middle of them and then the center!

And the best will be a plug for that!
Because even the Circle by Diameter don't work in this case!
Just 2 points to click

else you must without plug make some tricky align views/ axes etc...
The more easy seams to draw a line between the corners, then a rectangle
then the circle
Then kill line, rectangle

pilou

What's no more simple to draw a circle ?
It's like that i have understood the question of the first post!

Jean Lemire

Hi Pilou, hi folks.

There is an infinite number of circles between two points since there is an infinite number of planes around a line (the diameter).

Just ideas.

pilou

In the case of the inclined circle above

@unknownuser said:

an infinite number of planes around a line

But only one with a diameter // to the ground ! (i believe that will be a tricky plug
(in fact 2 if your circle has a color different recto verso

ipsketchpi

Cool, I like that 100/2 option. Exactly what I am looking for when I am too lazy to divide D to get R

Thanks!

namuh1

Silly question: Why does Layout let you set a circle by diameter... namely typing for exampe: 5" d in the toolbar to get a 5" diameter circle and Sketchup itself does not?

Dave R

@namuh1 said:

Silly question: Why does Layout let you set a circle by diameter... namely typing for exampe: 5" d in the toolbar to get a 5" diameter circle and Sketchup itself does not?

Two different programs.

Gaieus

It does allow - with a bit of basic calculation input - except when you also want to use the unit (it seems). I use a (centi)metric template and I can enter (say) 100/2 and it will draw a circle with an 50cm radius (i.e. 100cm dia).

I guess this does not help much with architectural imperial template for instance...

chmedly

I too would like this. It takes too much time to switch to a separate calculator to figure out a complex circle's radius. I thought the /2 idea would work but it doesn't I have a Sketchup model that is set to decimal inches. I keep trying to draw a circle with a 1.25" diameter. If I type 1.25/2 in the box I get a circle with a radius of 1.25. I've tried a number of different ways of typing this to no avail.

Futurepast

I use the scale tool. I draw the circle, use the scale tool by clicking on corner holding cntl key. Start the move and type in 2 or .5 to double or halve the circle

Dave R

I've just practiced doing the math in my head. I must say I've gotten faster at it with practice. It really isn't a big problem for me.

I would find scaling a circle after I've drawn it kind of a pain especially if it is drawn on something else in a location where the larger circle would have to cross other geometry.

mm0063

@chmedly said:

If I type 1.25/2 in the box I get a circle with a radius of 1.25. I've tried a number of different ways of typing this to no avail.

So try 125/200 instead of 1.25/2 .
See https://www.youtube.com/watch?v=crY8SVypzMQ

slbaumgartner

The technique of entering n/m works only because SketchUp's measurements box accepts fractions, not because it implements a divide operator as such. In a fraction both n and m must be integers. Any other type does not get treated as a numerator or denominator of a fraction.