get location or x ,y coordinates of mid point of width or height

tina123 · 2012-09-19 05:07:31

i have a rectangle with height = 123 and width = 92. also i have central location x ,y = 47 , 62 .

I can find the mid point of width and height of rectangle .
but i want to get location x ,y of mid point of width or height of rectangle .How can i get that .
Can any one please tell me mathematically .
thanks

bobbym · 2012-09-19 05:17:46

Hi tina123;

In order to get the x,y coordinates of your rectangle it would have to located along the xy axis otherwise the center point of it will be different for each rectangle.

See the drawing below.

tina123 · 2012-09-19 06:08:40

Well, we can find central location of a rectangle .
let say we have x,y initiail corner of rectangle is 1,1 . width and height of rectangle is 92 and 23 .

so cX = x + width/2 , cy =y+ height /2
that will give u central location of rectangle .
but how can we get location of mid point of width or height ?

Last edited by tina123 (2012-09-19 11:38:02)

bobbym · 2012-09-19 06:31:45

Hi;

To get the midpoint of a side you just add the coordinates and divide by 2. Same as for a line.

tina123 · 2012-09-19 11:37:04

bobbym wrote:

Hi;
To get the midpoint of a side you just add the coordinates and divide by 2. Same as for a line.

i know the way to get the mid point . mid point will be single value .
i want mid point location in x , y .
How can we get that ?

bobbym · 2012-09-19 19:03:46

Hi;

Do you want the mid point of a side or of the rectangle?

tina123 · 2012-09-20 23:50:51

bobbym wrote:

Hi;
Do you want the mid point of a side or of the rectangle?

yes , i mid point(int form of x ,y ) of a side of rectangle .
thanks

bobbym · 2012-09-21 00:02:09

Since the sides of a rectangle are either horizontal or vertical lines you do this.

For a horizontal side with coordinates (x1,y1) and (x2,y2) the midpoint is

For a vertical side with coordinates (x1,y1) and (x2,y2) the midpoint is

tina123 · 2012-09-21 00:53:02

Hy Dear Bobby,

Is that correct way to get the location in x,y of mid point of width and height ?
please check it : http://i1069.photobucket.com/albums/u472/tina12354/recTest_zps8f233dc8.png
Thanks

bobbym · 2012-09-21 00:57:08

Hi tina123;

Those formulas are the correct way to get the midpoint ( the red marks ) of a side of a rectangle when you have the (x,y) coordinates of the vertices of the side.

Try it on one.

Do you need a little more to understand it?

Math Is Fun Forum

#1 2012-09-19 05:07:31

get location or x ,y coordinates of mid point of width or height

#2 2012-09-19 05:17:46

Re: get location or x ,y coordinates of mid point of width or height

#3 2012-09-19 06:08:40

Re: get location or x ,y coordinates of mid point of width or height

#4 2012-09-19 06:31:45

Re: get location or x ,y coordinates of mid point of width or height

#5 2012-09-19 11:37:04

Re: get location or x ,y coordinates of mid point of width or height

#6 2012-09-19 19:03:46

Re: get location or x ,y coordinates of mid point of width or height

#7 2012-09-20 23:50:51

Re: get location or x ,y coordinates of mid point of width or height

#8 2012-09-21 00:02:09

Re: get location or x ,y coordinates of mid point of width or height

#9 2012-09-21 00:53:02

Re: get location or x ,y coordinates of mid point of width or height

#10 2012-09-21 00:57:08

Re: get location or x ,y coordinates of mid point of width or height

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