Scratch

In Looks category, you have 3 blocks related to the size of the sprite:
- change size by %n
- set size to %n%
- size (reporter)

They are defined in ScratchSpriteMorph's blockSpecs class method. You may want to take a look at the methods associated with those blocks:
- ScratchSpriteMorph>>changeSizeBy:
- ScratchSpriteMorph>>setSizeTo:
- ScratchSpriteMorph>>scale

They all use ScratchSpriteMorph's instance variable "scalePoint". Maybe you can get something out of it.

Okay, I've figured this out:

ChangeSizeBy: calls SetSizeTo:, which in turn calls ScalePoint:.  ScalePoint: sets ScalePoint (no colon) to t1, its argument.  Scale then returns (100 * scalePoint x) rounded.

So that's how size works.  The question is:  how can I reference Sprite1's Scalepoint variable in all sprites, and the background?  And what about the size of the costume?

Baderous wrote:

The default costume is loaded into the form of an ImageMedia in ScratchFrameMorph's defaultSprite class method. The form is initialized in ImageMedia>>initalize with an instance of Form class. The form class has instance variables such as width and height which you should be able to use somehow.

So let me get this straight:  Now I'm at Graphics-Display Objects > Form > accessing.  The variables 'height' and 'width' seem to be located there.  You think they refer to the height/width of the current costume?

Baderous wrote:

Yes.

It works!               

<when green flag clicked>
<forever>
<say[ THANK YOU!!!!
<end>

I think we should put these in the library.  Should we say it's your block?  It kinda is...   

Baderous wrote:

That's ok for me. 

But I made the blockspec...  *starts whining* 

...Just kidding.  I'll say you did most of it. 

Baderous wrote:

Just say it's our block (I read "our" instead of "your", only noticed after posting).

Nah, I barely did anything.  See my post:

http://scratch.mit.edu/forums/viewtopic … 81#p819081

Just to let you know that the blocks you/we created were more simpler than I thought, and as I think you haven't realized what you've done, I feel like I should explain you. The selector you defined for the reporter block "width" has the name "width" and, as you said, there's no new code. That's because the method that you're calling is not the width selector from the Form class, but Morph>>width. This method is inherited by ScratchSpriteMorph because this class is subclass of Morph and, as such, you needn't write new code. What this method does is call "bounds width", which returns the width of the bounds instance variable of the class Morph. This "bounds" is nothing more than a rectangle that encloses the morph (in this case, the sprite).

So, after all, it was simpler than we thought.