Scratch

Mik_Ael · 2012-11-17 15:59:59

Hi everyone !

I started using Scratch recently and have a problem understanding how coordinates works for an object placed on the scene.

I have this bird I want to move from left to right, then right to left and so on.
The coordinates of my bird on the screen don't fit those displayed in the mouse's coordinates zone... how does it works ?

Thanks in advance !

ErnieParke · 2012-11-17 16:16:17

The way it works is that each sprite has a set center and you're seeing its coordinates. Your mouse also has a center and it has to be directly over the sprite's center or else the coordinates will differ.

Anyway, I hope that this answers your question!

GenChico · 2012-11-17 16:21:58

I don't understand your problem completely but then again I'm tired. Sorry if this just confuses you more then anything.

Ok the scratch programing thing is made out of a x and y grid. X is the horizontal lines of the grid, going from left to right. A positive x value in a movement block makes the sprite go right, while a negative one makes it go left. The y is the vertical line, up or down. A positive y makes the sprite go up, while a negative goes down. To find the cooords if a object you double click on it then look up in the upper-left hand corner of the screen.

Mik_Ael · 2012-11-17 16:40:05

Thanks a lot Ernie and GenChico ! big_smile This indeed answers my question( which I confess was a bit hard to to understand ^^')

So, if I want my bird to start in the left end on the screen and travel to the right end, i'll use something like below but value is to be put instead of 10000 in my example ?

when gf clicked
forever
  repeat until <(x position) = [10000]>
    move [1] step
  end
end

Mik_Ael · 2012-11-17 16:43:10

"what value is to be put instead of 10000 ?" sorry for the double post, I forgot a word there.

ErnieParke · 2012-11-17 16:48:27

Mik_Ael wrote:
Thanks a lot Ernie and GenChico ! This indeed answers my question( which I confess was a bit hard to to understand ^^')

So, if I want my bird to start in the left end on the screen and travel to the right end, i'll use something like below but value is to be put instead of 10000 in my example ?
when gf clicked
forever
  repeat until <(x position) = [10000]>
    move [1] steps
  end

Fixed. Anway, what you might want to do is first, create a script like this:

when gf clicked
forever
 change x by (1)

And once you've run that (which you can do by clicking it), use the sprite's x position instead of 100,000.

Anyway, I hope that this helps!

Last edited by ErnieParke (2012-11-17 16:48:36)

Bailz_Gamer · 2012-11-17 16:51:29

Step 1: Drag your bird to wherever you want it to be on the left

Step 2: Check your bird's co-ordinates as shown below

This is where you find the co-ordinates

Remember these co-ordinates or write them down
I will be referring to them as the left co-ordinates

Step 3: Drag your bird to wherever you want it to be on the right

Step 4: Check your bird's co-ordinates as shown below

This is where you find the co-ordinates

Remember these co-ordinates or write them down
I will be referring to them as the right co-ordinates

Step 5: Drag your bird to wherever you want it's starting point to be

Step 6: Check your bird's co-ordinates as shown below

This is where you find the co-ordinates

Remember these co-ordinates or write them down
I will be referring to them as the start co-ordinates

Step 7: Add this script

when gf clicked
go to x: (start co-ordinate x) y: (start co-ordinate y)
forever
point in direction (-90 v)
glide (1) secs to x: (left co-ordinate x) y: (left co-ordinate y)
point in direction (90 v)
glide (1) secs to x: (right co-ordinate x) y: (right co-ordinate y)
end

Just replace the variable blocks with you start co-ordinates, left co-ordinates and right co-ordinates

I hope I helped big_smile

Last edited by Bailz_Gamer (2012-11-17 16:53:17)

Mik_Ael · 2012-11-17 17:12:40

Thanks again Ernie, I think I understand the coordinates stuff better now !

Wow, thanks for making me a tutorial so quickly Bailz_Gamer big_smile I'm trying it right now to see what method suits the bird best. You sure helped me here!!
I wanna help like that when I grow a little more used to Scratch smile

Bailz_Gamer · 2012-11-17 17:20:43

Mik_Ael wrote:
Thanks again Ernie, I think I understand the coordinates stuff better now !

Wow, thanks for making me a tutorial so quickly Bailz_Gamer I'm trying it right now to see what method suits the bird best. You sure helped me here!!
I wanna help like that when I grow a little more used to Scratch

No problem, happy to help smile

ErnieParke · 2012-11-17 17:54:53

Mik_Ael wrote:
Thanks again Ernie, I think I understand the coordinates stuff better now !

Wow, thanks for making me a tutorial so quickly Bailz_Gamer I'm trying it right now to see what method suits the bird best. You sure helped me here!!
I wanna help like that when I grow a little more used to Scratch

Your welcome! And certainly, in the near future, you could be helping lots of scratchers.

Bailz_Gamer · 2012-11-17 22:27:24

OH YEAH I FORGOT
For smooth turning around costumes, click on the left/right arrow in this picture

Mik_Ael · 2012-11-18 09:04:23

Thank you Bailz_gamer ! Thanks to all this help I can share my first project today big_smile

Scratch

archived forums

#1 2012-11-17 15:59:59

Coordinates of an object

#2 2012-11-17 16:16:17

Re: Coordinates of an object

#3 2012-11-17 16:21:58

Re: Coordinates of an object

#4 2012-11-17 16:40:05

Re: Coordinates of an object

#5 2012-11-17 16:43:10

Re: Coordinates of an object

#6 2012-11-17 16:48:27

Re: Coordinates of an object

Mik_Ael wrote:

#7 2012-11-17 16:51:29

Re: Coordinates of an object

#8 2012-11-17 17:12:40

Re: Coordinates of an object

#9 2012-11-17 17:20:43

Re: Coordinates of an object

Mik_Ael wrote:

#10 2012-11-17 17:54:53

Re: Coordinates of an object

Mik_Ael wrote:

#11 2012-11-17 22:27:24

Re: Coordinates of an object

#12 2012-11-18 09:04:23

Re: Coordinates of an object

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