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#1 Re: Help Me ! » Arc to arc calculation (This time with a picture) » 2006-08-17 12:49:44

Is this arc-to-arc math question calcuable?
Are there other bits of info needed to find the answer?

It looks simple to me, but then I don't presume to have the answer...

Any takers?


#2 Help Me ! » Arc to arc calculation (This time with a picture) » 2006-08-13 10:10:07

Replies: 1

I have an arc starting at 0,0 (x=0 & y=0) call this "P1". (counter-clockwise)
The raidus is 1329.0000000
The start angle is 68.45736452
The end angle is 90.00000000
The arc-length is 499.69060185

Also from "P1" horizontally back to the left (angle=180.000000), to a vertical 90 degree line from the end-angle of the 1st arc is 488.0000000 long.
This is how I found my starting point (P1) on the 1st arc.

At the start-angle (P1) a vertical line is 28.875000 long.  (This length will never change)
Angle = 90.0000000
At the end of this line (call this "P2") is the start of another arc going counter-clockwise.
The radius is 77.15944660  (This radius will never change)

Back to the center-point of the arc is:
The Angle in XY Plane = 277.43909137 (from "P2")
Delta X = 9.99000000
Delta Y = -76.51000000

I need a calculation to find the intersection of these 2 arcs.  (in terms a dummy like me can understand)

I hope someone can help!


#3 Re: Help Me ! » Arc to arc calculation » 2006-08-11 23:14:48

Where is the image upload link?

Well i'll be darned...
After posting this "quick message", I saw an "edit" link, I edited this message an... up poped an image upload slot.
It's amazing how web site builders overlook the simple things!

Here is the Image!

Only the distances marked with the text "known" are known.
The rest is placed there for reference.

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