Discuss Scratch

doonkoo
Scratcher
100+ posts

How Do I Make a Rectangle Rotate From It's Center?

So I am making a project where I need a rectangle to spin from it's center. But it rotates from the top left corner. Is there a way to fix this?

“I am pleased a book on science competes with the memoirs of pop stars. Maybe there is some hope for the human race.”
-Stephen Hawking

“Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.”
-Albert Einstein

“I have noticed people who claim everything is predestined, and that there is nothing we can do to change it, look before they cross the road.”
-Stephen Hawking
Maltese_Falcon
Scratcher
100+ posts

How Do I Make a Rectangle Rotate From It's Center?

Check your costume center (In the paint editor, near the top, there should be a little + button. Click that, and click the center of the rectangle.
doonkoo
Scratcher
100+ posts

How Do I Make a Rectangle Rotate From It's Center?

I also need two girl sprites to rotate with the rectangle like this:

__________________________
G G l
G G l
G G l
__________________________l

and then be

_______________
GGG l
l
GGG l
_______________ The G's are the girl sprites but the girls heads should always be facing the top of the rectangle

“I am pleased a book on science competes with the memoirs of pop stars. Maybe there is some hope for the human race.”
-Stephen Hawking

“Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.”
-Albert Einstein

“I have noticed people who claim everything is predestined, and that there is nothing we can do to change it, look before they cross the road.”
-Stephen Hawking
ErnieParke
Scratcher
1000+ posts

How Do I Make a Rectangle Rotate From It's Center?

doonkoo wrote:

I also need two girl sprites to rotate with the rectangle like this:

__________________________
G G l
G G l
G G l
__________________________l

and then be

_______________
GGG l
l
GGG l
_______________ The G's are the girl sprites but the girls heads should always be facing the top of the rectangle
I'm not really getting the rotation part of this all… Do you mean that you need the girls' heads to rotate with them, but stay pointing the top of the rectangle? Is that all?

Obviously, I'm not reading your post well, so if you feel that I'm not understanding you, then feel free to try again. ;)

With regards,

ErnieParke

Last edited by ErnieParke (July 18, 2013 21:38:34)


doonkoo
Scratcher
100+ posts

How Do I Make a Rectangle Rotate From It's Center?

Okay, I'm not describing it well. So the rectangle rotates like a wheel. if there were a person shaped sticker on the wheel, the sticker would stay pointing at the same spot on the wheel. I need to know how to do the sticker thing i just described.

“I am pleased a book on science competes with the memoirs of pop stars. Maybe there is some hope for the human race.”
-Stephen Hawking

“Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.”
-Albert Einstein

“I have noticed people who claim everything is predestined, and that there is nothing we can do to change it, look before they cross the road.”
-Stephen Hawking
drmcw
Scratcher
1000+ posts

How Do I Make a Rectangle Rotate From It's Center?

Does this help?

10 !
ScratchVaders or Galaga?
Maybe Eliza can help you decide?
0bitasy0
Scratcher
76 posts

How Do I Make a Rectangle Rotate From It's Center?

I think i get it- if you want the girls to “rotate” but stay upright, you won't be using rotate at all. Instead, their x and y coordinates need to be changed so they look like they go in a circular path that follows the edge of the rectangle. Thus, I present you with this: http://scratch.mit.edu/projects/11489553/
doonkoo
Scratcher
100+ posts

How Do I Make a Rectangle Rotate From It's Center?

Uhh i dont know what the I select v I of o block does. I don't know what the selections mean

“I am pleased a book on science competes with the memoirs of pop stars. Maybe there is some hope for the human race.”
-Stephen Hawking

“Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.”
-Albert Einstein

“I have noticed people who claim everything is predestined, and that there is nothing we can do to change it, look before they cross the road.”
-Stephen Hawking
ErnieParke
Scratcher
1000+ posts

How Do I Make a Rectangle Rotate From It's Center?

doonkoo wrote:

Uhh i dont know what the I select v I of o block does. I don't know what the selections mean
That's just math; you might learn it soon (in 7th - 10th grade). If you'd like to know more, just ask, but for now, just know that it's figuring out where Anna should go.

By the way, nice quotes in your signature!

With regards,

ErnieParke

doonkoo
Scratcher
100+ posts

How Do I Make a Rectangle Rotate From It's Center?

Dangit! One grade behind… But I did some experiments, and I think I found a selection that will accomplish what I want to accomplish. I can't tell you. It's for a contest.

And thanks for the quote-compliment!

Last edited by doonkoo (July 19, 2013 00:56:34)


“I am pleased a book on science competes with the memoirs of pop stars. Maybe there is some hope for the human race.”
-Stephen Hawking

“Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.”
-Albert Einstein

“I have noticed people who claim everything is predestined, and that there is nothing we can do to change it, look before they cross the road.”
-Stephen Hawking

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