BigNate469 wrote:

undeterministic3 wrote:

Ok but then the shader would be kinda complicated as first you would have to scale horizontally to one which means knowing the width. But I don't know if GLSL has AABB detection

That's what vertex shaders are for.

Yes, doing this with a fragment shader would be next to impossible unless you already knew the width and height of the sprite, and there was only one sprite on the stage. Vertex shaders exist solely to move vertices (in this case, the mathematical points describing the triangles that that make up a sprite) so stretching isn't hard for them.

1. Add a new block that allows people to independently change the x and y scaling of a costume.
   
   
2. Add a stretch effect to the effect block (so that would mean not adding any new blocks to the editor palette).
   
   
3. Restore the legacy stretch blocks which worked in Scratch 1.4 — even if it was not in the palette — and which only stretched a costume in the Y direction.
   

• Scratch version (no stretch) https://scratch.mit.edu/projects/621529919/
  
• Snap version (with stretch) https://snap.berkeley.edu/project?username=10goto10&projectname=Adventure%20with%20Stretch%20%2d%20Part%20One
  

• Scratch version (no stretch) https://scratch.mit.edu/projects/622930329/
  
• Snap version (with stretch) https://snap.berkeley.edu/project?username=10goto10&projectname=Adventure%20with%20Stretch%20Part%20two
  

shaymin88 wrote:

Ever since about 6th grade, I've been using Scratch. Now in college, I use Scratch a fair amount less than I used too, but there is one feature that I wish would be implemented, which is sprite stretching. The applications of this are fairly broad, ranging from animation made with greater ease to routine graphical effects that exist in other languages, like Python, where you can import libraries like Pillow that allow you to manipulate images. Examples of the blocks I have in mind are below:

change [horizontal stretch v] effect by (25) ::looks
change [vertical stretch v] effect by (25) ::looks
set [horizontal stretch v] effect to (25)% ::looks
set [vertical stretch v] effect to (25)% ::looks
set stretch to x (240) y (-180) ::looks
(Vertical Stretch ::sensing)
(Horizontal Stretch ::sensing)

These blocks and the concepts behind them seem to be fairly intuitive, easy to understand, and readily accessible for a younger demographic who may not want or desire to put in the time commitment of researching work arounds that tend to be time consuming.
As I understand it, this is not the first time by far stretching has been suggested for Scratch. This current topic is currently a merged topic between u/epicanna27 - created on November 17, 2014 - and mine - created on February 15, 2015. Other topics on this suggestion can be found here, here, and here. There was even at one point a “Change Stretch by ()” block considered for scratch at one time, as seen here (also linked above), and in u/Paddle2See's post in this forum:

Paddle2See wrote:

In the 1.4 version of Scratch, if you search through the source code (which is in a language called Squeek), you will find traces of an experimental “stretch” block! However, it was never in any of the officially released versions that I have used. I can only assume that it was decided that it was too confusing - or not useful enough - to earn a permanent place in the block pallet. Which is too bad as it would be very helpful for certain kinds of visual effects.

Part of what makes Scratch so easy to learn and such a great first language is it's simplicity. Every new block that is added makes it a bit more complex - so new blocks are added only after long consideration.

Alas, that is all that I have for this suggestion. I hope I have swayed some minds, and, above all else, I hope to see amazing feedback from all who come to this topic. The current iteration of this suggestion was made possible by the users u/The_Scratch_Squad, u/Skelepound, and u/ihgfedcba and any future suggestions only serve to make this suggestion stronger. Thanks for your time. Below is a list of all supporters I've tallied as of October 12, 2020:

that whole stretch block is from a mod

epicanna27 wrote:

We already have a block that will change the size of a sprite:

change size by (1)

But is this alone what we need?
I'm proposing we switch “size” to a drop-down box that says “size, width, height” instead.
This way we could choose to change the width and height separately, or just use size to change them both.
These three blocks below are what I'm picturing.

change [size v] by (1) :: looks
change [width v] by (1) :: looks
change [height v] by (1) :: looks

Of course, we'd need to make two new variables:

(size)
(width :: looks)
(height :: looks)

And unlike my previous “Online and Offline Blocks” idea, I put thought into this. I even came up with it while I was watching an animation that clearly needs the “width” block! It showed a sprite becoming wider and wider. The current only way to do this is to make a bunch of costumes, and unless you spend an unnecessary amount of time animating it, it'll be pretty chunky. That's what happened in the animation. But because it's easy to create something that appears smooth with the existing size block, if we made it work for width and height, we could make lots more things smooth.