Welcome to TalkGraphics.com
Results 1 to 8 of 8
  1. #1
    Join Date
    Aug 2000
    Location
    Las Vegas, NV, USA
    Posts
    1,191

    Default Center of an Equilateral Triangle - please lower it.

    Try this: 1. Create a circle with a diameter of 6 inches. 2. Create an equilateral triangle that is 5.175 inches wide. Center the two objects to the middle of a page.

    Shouldn't the triangle be in the center of circle?

    Edit: The workaround I have found is to use a hexagon and then when you have it in the right position, convert it to a triangle.

    This is inconvenient and unintuitive.
    Sheff
    My Site

  2. #2
    Join Date
    Aug 2000
    Location
    Placitas, New Mexico, USA
    Posts
    41,650

    Default Re: Center of an Equilateral Triangle - please lower it.

    That's a hard one and I have noticed this before.

    Xara is centering on the physical center of the triangle (see attached).
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	physical center.png 
Views:	149 
Size:	7.9 KB 
ID:	102129  

  3. #3
    Join Date
    Feb 2007
    Location
    UK
    Posts
    21,567

    Default Re: Center of an Equilateral Triangle - please lower it.

    if you are using the object alignment tool then that works on the boundary box,the centre of which is not the centre of a triangle on account of it [the boundary box] being rectangular and bigger, so there is displacement - likely this will happen with any odd sided polygon on account of it not being symmetric, whereas the boundary box is

    not sure if there is anyway round that other than the way you already do it...

  4. #4
    Join Date
    Jun 2004
    Location
    North Tawton, UK
    Posts
    1,158

    Default Re: Center of an Equilateral Triangle - please lower it.

    The alignment dialog uses bounding boxes to align objects. It knows nothing about the detailed geometry of the objects.

    However, the snapping system does understand the geometry of objects and so if you create the triangle using the Quickshape tool, make sure snapping is turned on and the drag the triangle into position it will snap its geometrical centre to the centre of the circle.

    Phil

  5. #5
    Join Date
    Feb 2007
    Location
    UK
    Posts
    21,567

    Default Re: Center of an Equilateral Triangle - please lower it.

    thanks Phil - that does indeed align them by the centres

  6. #6
    Join Date
    Jun 2006
    Location
    London, UK
    Posts
    151

    Default Re: Center of an Equilateral Triangle - please lower it.

    Which centre?
    Click image for larger version. 

Name:	triangle-centers.gif 
Views:	189 
Size:	10.1 KB 
ID:	102350

  7. #7
    Join Date
    Aug 2000
    Location
    Placitas, New Mexico, USA
    Posts
    41,650

    Default Re: Center of an Equilateral Triangle - please lower it.


  8. #8
    Join Date
    Feb 2007
    Location
    UK
    Posts
    21,567

    Default Re: Center of an Equilateral Triangle - please lower it.

    ah, nothing's ever simple is it

 

 

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •