Eagle snafu,CIRCLE command

Now files are getting corrupted during editing. SCR commands now have no VISIBLE effect, but Eagle thinks there has been a change. I only know after the fact - which is when all is settled. Real crap!

sounds unusual, more people swear by it that at it. perhaps run a generic diagnositc like memtest-86+ overnight?

oops:

more people swear by it THAN at it.

It's doing exactly as it is told. The problem is that the second set of enclosed numbers (1 0) is NOT the radius, it is a POINT on the circumference. Notice that your circle's circumference passes through the point x=1, y=0 in the first case and through x=0, y=0 in the second case. Of course, it defines the same circle because one circle passes through both points.

To follow up with an example, if you want a circle with center at

• Make sure your grid is set for inches

• CIRCLE (0.496 2.842) (1.496 2.842)

Looks like the info command does not calculate the radius correctly. I tried with various placements, only origin placements give the correct radius.

very Interesting....

Cheers

Then explain why the CIRCLE (0.496 2.842) (0 0) gives the *same* results.

Well, the "help" indicates that is a diameter...contrary to what you say. Vary parameters in the second set and see no or little change.

NOT what the "help" sez....Syntax CIRCLE ? ?.. [center, circumference]

So the work-around would be to generate wanted circle at 0,0 and then move it to correct place.

Notice it says circumference. Center is a pair of numbers. Circumference is a pair of numbers. Diameter or radius would be a single number. Circumference is a POINT (x,y) on the circles CIRCUMFERENCE.

As I said above, it defines the same circle because both (0 0) and (0 1) define the (x y) coordinates on the same circle's circumference.

Help says nothing about the diameter. It indicates a coordinate pair on the circumference.

I gave an example to show how it is done.

That is one way to do it. But, I gave an example to show you how to do it.

It says ...[center, CIRCUMFERENCE]. That means two sets of coordinates. Let me try this another way...

What is the radius of a circle whose center is at (0.496 2.842) and whose circumference passes through (1 0)? Does the same circle's circumference just happen to pass through (0 0)?

Now try CIRCLE (0.496 2.842) (1.496 2.842) and use the info button to read the circle's radius. You will see that it is 1 inch. That's because the circumference passes through (1.496 2.842). As you can see, the horizontal value 1.496 is one inch greater than 0.496 and the y coordinate has not changed.

This is the way Eagle has done it for over 10 years. It is not the usual way CAD programs work, but there you have it.

Words from one "radius", words from another "circumference", words from "help" is "circumference" with ZERO examples. Results from experimentation so far totally inconsistent with any interpretation.

Dew tell. Draw a circle with center at x=0.496, y=2.842 and circumference crossing x=0, y=0. What is the radius? Hint: SQRT(0.496^2 + 2.842^2) or about 2.885. Now draw a NEW circle with center at x=0.496, y=2.842 and circumference crossing x=0, y=1. What is the radius? Hint: a circle of about 1.819 radius; leave calculation to the student.

Isn't the radius of a circle one half of the diameter? In any case, it talks about the circumference in one breath and the radius in another breath.