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Dec 30th, 2023
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 Re: Math Prodigy's
[Re: Flippin-Out]
#13519516
04/15/20 07:51 PM
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Joined: Oct 2006
Posts: 95,891
Bigbob_FTW
OP
Big Sprocket Bob
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OP
Big Sprocket Bob
Joined: Oct 2006
Posts: 95,891 |
Ahhh, you need the center of a circle that includes an arc, NOT the centerpoint along the length of an arc. Those are two different solutions. I'll sharpen my crayon with the illustration in front of me. that's it!
![[Linked Image]](https://texasfishingforum.com/forums/pics/usergals/2017/07/full-20284-169975-biyl8lail.jpg) ![[Linked Image]](https://texasfishingforum.com/forums/pics/usergals/2017/07/full-20284-169974-image_preview.jpg) FJB
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Re: Math Prodigy's
[Re: Bigbob_FTW]
#13519517
04/15/20 07:52 PM
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Joined: Sep 2008
Posts: 121,178
hopalong
Pescador Loco
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Pescador Loco
Joined: Sep 2008
Posts: 121,178 |
" Hop, set the hook"!
hopalong 99,999
TexDawg 99,999
FJB! not my president by a long shot!
lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479
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Re: Math Prodigy's
[Re: Bigbob_FTW]
#13519530
04/15/20 08:00 PM
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Joined: Feb 2015
Posts: 4,724
Flippin-Out
TFF Team Angler
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TFF Team Angler
Joined: Feb 2015
Posts: 4,724 |
BTW, what you have marked as "radius" is the arc. The radius is the dotted line from each end of the chord to the center.
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Re: Math Prodigy's
[Re: Flippin-Out]
#13519543
04/15/20 08:11 PM
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Joined: Oct 2006
Posts: 95,891
Bigbob_FTW
OP
Big Sprocket Bob
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OP
Big Sprocket Bob
Joined: Oct 2006
Posts: 95,891 |
BTW, what you have marked as "radius" is the arc. The radius is the dotted line from each end of the chord to the center. yes, terminology issue with drafters. 
FJB
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Re: Math Prodigy's
[Re: Bigbob_FTW]
#13519549
04/15/20 08:17 PM
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Joined: Feb 2015
Posts: 4,724
Flippin-Out
TFF Team Angler
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TFF Team Angler
Joined: Feb 2015
Posts: 4,724 |
Looking at either illustration, do you know the x/y coordinates of each of the 3 points connected by the dashed lines?
And the goal is to calculate x/y coordinates of the floating point? ![[Linked Image]](https://texasfishingforum.com/forums/pics/userpics/2020/04/full-20284-47305-2020_04_15_14_25_05.jpg) Two known points are insufficient to arrive at a single unique solution. The reason is that we could fit those two known points very close together as a very small portion of a large circle, or far apart on a smaller circle. In both cases, the circle passes through the two points, but the centers of those two circles are entirely different points on the grid. We need more information to calculate a solution. Since you wish to solve for a radius (and therefore a center) a third point would be needed as one way to allow for a unique solution.
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Re: Math Prodigy's
[Re: Flippin-Out]
#13519567
04/15/20 08:41 PM
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Joined: Sep 2008
Posts: 121,178
hopalong
Pescador Loco
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Pescador Loco
Joined: Sep 2008
Posts: 121,178 |
Looking at either illustration, do you know the x/y coordinates of each of the 3 points connected by the dashed lines?
And the goal is to calculate x/y coordinates of the floating point? Two known points are insufficient to arrive at a single unique solution. The reason is that we could fit those two known points very close together as a very small portion of a large circle, or far apart on a smaller circle. In both cases, the circle passes through the two points, but the centers of those two circles are entirely different points on the grid. We need more information to calculate a solution. Since you wish to solve for a radius (and therefore a center) a third point would be needed as one way to allow for a unique solution. can't you find the length of the straight line from x2 - y2 and just center off that? that is how I would lay out your driveway or sidewalk, well, if I was gonna lay out a driveway or a sidewalk for ya. 6/8/10 a 90 from center line of the straight line and poof, you got a driveway!
" Hop, set the hook"!
hopalong 99,999
TexDawg 99,999
FJB! not my president by a long shot!
lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479
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Re: Math Prodigy's
[Re: Bigbob_FTW]
#13519569
04/15/20 08:42 PM
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Joined: Sep 2008
Posts: 121,178
hopalong
Pescador Loco
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Pescador Loco
Joined: Sep 2008
Posts: 121,178 |
dang engineers! 
" Hop, set the hook"!
hopalong 99,999
TexDawg 99,999
FJB! not my president by a long shot!
lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479
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Re: Math Prodigy's
[Re: TexDawg]
#13519585
04/15/20 08:57 PM
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Joined: Oct 2005
Posts: 85,966
John175☮
MACHO MAN
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MACHO MAN
Joined: Oct 2005
Posts: 85,966 |
“Do not pray for easier lives. Pray to be stronger men.” -JFK
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Re: Math Prodigy's
[Re: Bigbob_FTW]
#13519628
04/15/20 09:35 PM
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Joined: Oct 2006
Posts: 95,891
Bigbob_FTW
OP
Big Sprocket Bob
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OP
Big Sprocket Bob
Joined: Oct 2006
Posts: 95,891 |
FJB
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Re: Math Prodigy's
[Re: hopalong]
#13519632
04/15/20 09:37 PM
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Joined: Mar 2015
Posts: 12,174
UGLYSHCTICK
TFF Guru
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TFF Guru
Joined: Mar 2015
Posts: 12,174 |
dang engineers! ![[Linked Image]](https://texasfishingforum.com/forums/pics/userpics/2020/04/full-95375-47316-tree.png)
Just want to make folks smile, and spit coffee on their keyboard.
If you put beans in your chili, you don't know beans about chili.
God doesn't create temporary people, you will spend eternity somewhere. Choose wisely.
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Re: Math Prodigy's
[Re: UGLYSHCTICK]
#13519639
04/15/20 09:40 PM
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Joined: Oct 2006
Posts: 95,891
Bigbob_FTW
OP
Big Sprocket Bob
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OP
Big Sprocket Bob
Joined: Oct 2006
Posts: 95,891 |
dang engineers! Used to have of on my wall!
FJB
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Re: Math Prodigy's
[Re: Bigbob_FTW]
#13519652
04/15/20 09:54 PM
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Joined: Apr 2006
Posts: 24,930
outfishdya
TFF Guru
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TFF Guru
Joined: Apr 2006
Posts: 24,930 |
You cannot just draw features on a navionics map and expect to catch fish there.
Woke up this morning
Got yourself a gun....
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Re: Math Prodigy's
[Re: hopalong]
#13519666
04/15/20 10:12 PM
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Joined: Feb 2015
Posts: 4,724
Flippin-Out
TFF Team Angler
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TFF Team Angler
Joined: Feb 2015
Posts: 4,724 |
Looking at either illustration, do you know the x/y coordinates of each of the 3 points connected by the dashed lines?
And the goal is to calculate x/y coordinates of the floating point? Two known points are insufficient to arrive at a single unique solution. The reason is that we could fit those two known points very close together as a very small portion of a large circle, or far apart on a smaller circle. In both cases, the circle passes through the two points, but the centers of those two circles are entirely different points on the grid. We need more information to calculate a solution. Since you wish to solve for a radius (and therefore a center) a third point would be needed as one way to allow for a unique solution. can't you find the length of the straight line from x2 - y2 and just center off that? that is how I would lay out your driveway or sidewalk, well, if I was gonna lay out a driveway or a sidewalk for ya. 6/8/10 a 90 from center line of the straight line and poof, you got a driveway! Yes, the midpoint of the chord can be located. (The chord is the straight line between two points on a circle. Then we could mark a radius, but we don't know how FAR it is to the center of the circle. When you layout some concrete forms, you are also "mentally" doing some curve fitting. You choose a radius that smooths the lines together, and that's by sight for aesthetics. He's working with a grid in a program, so that human choice can't be injected.
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Re: Math Prodigy's
[Re: outfishdya]
#13519667
04/15/20 10:12 PM
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Joined: Sep 2008
Posts: 121,178
hopalong
Pescador Loco
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Pescador Loco
Joined: Sep 2008
Posts: 121,178 |
You cannot just draw features on a navionics map and expect to catch fish there. I don't have to draw on my navionics map to not catch fish, look at all the time I saved.
" Hop, set the hook"!
hopalong 99,999
TexDawg 99,999
FJB! not my president by a long shot!
lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479
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