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# establishing points at intersections

N/A

In order to learn SE, I dragged out my old dusty drafting text book and decided to
go through the exercises. One of these was geometric construction techniques.
Example: Bisect an acute angle. The method is to draw arcs along both sides of
the angle to establish equal length lines, then strike arcs which intersect at a
mid point between the lines. that intersection and the origin establish end points
for the line which bisects the angle. Easy. But,
where my arcs intersect, how do I accurately establish a point at the precise intersection?
Intellisketch picks up mid points, end points, etc. but not intersections. What
am I missing?
I see that SE will calculate this line for me, but I was just wondering how to pick
up those intersection points.
BTW, I have watched this list and I'm impressed with your willingness to assist
with all manner of questions. Outstanding.
5 REPLIES

# Re: establishing points at intersections

N/A

Al,
This is a very good question for a beginner to the software.
I assume you have already found that you can toggle on and off the relationships
between objects by toggling Tools-Maintain Relationships on and off.
There are many keypoints that may be

# Re: establishing points at intersections

N/A

Al,
This is a very good question for a beginner to the software.
I assume you have already found that you can toggle on and off the relationships
between objects by toggling Tools-Maintain Relationships on and off.
There are many keypoints that may be used during object creation. These may be enabled
and disabled by going to Tools-IntelliSketch and clicking on the Relationships tab
in the dialog. You will notice that there is an 'Intersection point' relationship
that is not checked. Just check this option.
To easily test this option, draw two intersecting lines. Start placing a third line
and move the cursor close to the intersection if the first two. You should see the
intersection relationship show. When you clock to place the line endpoint it will
be placed at the intersection of the first two lines.
You can also locate the projected intersection of objects.

# Re: establishing points at intersections

N/A

Cool. My work around was to "trim" one of the arcs, thus creating an end point.
but I knew there had to be a better way. This is really powerful stuff. Thanks for
the assist.
"Ricky Black" wrote:
>
>Al,
>This is a very good question for a beginner to the software.
>
>I assume you have already found that you can toggle on and off the relationships
>between objects by toggling Tools-Maintain Relationships on and off.
>
>There are many keypoints that may be used during object creation. These may
>be enabled
>and disabled by going to Tools-IntelliSketch and clicking on the Relationships
>tab
>in the dialog. You will notice that there is an 'Intersection point' relationship
>that is not checked. Just check this option.
>
>To easily test this option, draw two intersecting lines. Start placing a third
>line
>and move the cursor close to the intersection if the first two. You should
>see the
>intersection relationship show. When you clock to place the line endpoint
>it will
>be placed at the intersection of the first two lines.
>
>You can also locate the projected intersection of objects.

# Re: establishing points at intersections

N/A
This is also a great opportunity to learn how powerful relationships and
"variational geometry" can be. When you are feeling more advanced try this:
Go to Tools and turn on Maintain Relationships
Draw three lines that meet at a common vertex (i.e. the two lines you want
to bisect and a rough bisector)
Choose Smart Dimension and click the outer two lines -- hit the A on the
keyboard to swap to Angle dimension -- place the angular dim between them
Click on one of the lines and the bisector line and hit A and place another
angular dimension
Now choose the select tool (arrow at top of toolbar) and DOUBLE click on the
bisectors angular dimension -- notice that a formula bar comes up at top of
window
Now click on the overall angle dimension (single click) Notice that it goes
in the formula as Vxxx. Click in theformula bar after the Vxxx and add the
text *1/2 in the formular bar(to make the bisector dim half the overall dim)
And Voila the system did it all for you. No more compass!
PS> The color of the bisector dims text means its "driven" by another
dimensional value.
DS

"Al Hollaway" wrote in message
news:452bff66\$1@bbsnotes.ugs.com...
>
> Cool. My work around was to "trim" one of the arcs, thus creating an end
> point.
> but I knew there had to be a better way. This is really powerful stuff.
> Thanks for
> the assist.
>
> "Ricky Black" wrote:
>>
>>Al,
>>This is a very good question for a beginner to the software.
>>
>>I assume you have already found that you can toggle on and off the
>>relationships
>>between objects by toggling Tools-Maintain Relationships on and off.
>>
>>There are many keypoints that may be used during object creation. These
>>may
>>be enabled
>>and disabled by going to Tools-IntelliSketch and clicking on the
>>Relationships
>>tab
>>in the dialog. You will notice that there is an 'Intersection point'
>>relationship
>>that is not checked. Just check this option.
>>
>>To easily test this option, draw two intersecting lines. Start placing a
>>third
>>line
>>and move the cursor close to the intersection if the first two. You should
>>see the
>>intersection relationship show. When you clock to place the line endpoint
>>it will
>>be placed at the intersection of the first two lines.
>>
>>You can also locate the projected intersection of objects.

>

# Re: establishing points at intersections

N/A

hey that's slick! works like a charm. I've been playing with formulas in other
functions. Very handy little item.
"Dan Staples" wrote:
>This is also a great opportunity to learn how powerful relationships and
>"variational geometry" can be. When you are feeling more advanced try this:
>
>Go to Tools and turn on Maintain Relationships
>Draw three lines that meet at a common vertex (i.e. the two lines you want
>
>to bisect and a rough bisector)
>Choose Smart Dimension and click the outer two lines -- hit the A on the
>keyboard to swap to Angle dimension -- place the angular dim between them
>Click on one of the lines and the bisector line and hit A and place another
>
>angular dimension
>Now choose the select tool (arrow at top of toolbar) and DOUBLE click on the
>
>bisectors angular dimension -- notice that a formula bar comes up at top of
>
>window
>Now click on the overall angle dimension (single click) Notice that it goes
>
>in the formula as Vxxx. Click in theformula bar after the Vxxx and add the
>
>text *1/2 in the formular bar(to make the bisector dim half the overall dim)
>And Voila the system did it all for you. No more compass!
>
>PS> The color of the bisector dims text means its "driven" by another
>dimensional value.
>
>DS
>
>
>"Al Hollaway" wrote in message
>news:452bff66\$1@bbsnotes.ugs.com...
>>
>> Cool. My work around was to "trim" one of the arcs, thus creating an end

>
>> point.
>> but I knew there had to be a better way. This is really powerful stuff.

>
>> Thanks for
>> the assist.
>>
>> "Ricky Black" wrote:
>>>
>>>Al,
>>>This is a very good question for a beginner to the software.
>>>
>>>I assume you have already found that you can toggle on and off the
>>>relationships
>>>between objects by toggling Tools-Maintain Relationships on and off.
>>>
>>>There are many keypoints that may be used during object creation. These

>
>>>may
>>>be enabled
>>>and disabled by going to Tools-IntelliSketch and clicking on the
>>>Relationships
>>>tab
>>>in the dialog. You will notice that there is an 'Intersection point'
>>>relationship
>>>that is not checked. Just check this option.
>>>
>>>To easily test this option, draw two intersecting lines. Start placing a

>
>>>third
>>>line
>>>and move the cursor close to the intersection if the first two. You should
>>>see the
>>>intersection relationship show. When you clock to place the line endpoint
>>>it will
>>>be placed at the intersection of the first two lines.
>>>
>>>You can also locate the projected intersection of objects.

>>
>
>
>