Sprite Sprite sheet Texture Size guidelines

[Maxxx]

Greetings.

If I create a sprite from a .png file and then get its texture, the texture is the size of the png - which is what one would expect.

If I create a sprite from a sprite sheet, and then get its texture, the texture is the size of the sprite sheet - which is not what I expected.

Now I am using that texture to apply some effects to - but of course my effects are applied to the whole sheet! Not what I expected.

I’m basing my code on

[Cocos3.8 Tutorial] RenderTexture + Blur

This tutorial will help you to understand how you can use shaders and render textures in cocos2d-x 3.0 and will give you some insights in the underlying math. In one of my projects I faced a necessity to make a blurred version of some background landscape, which composition depends on the screen size, that is clouds are sticked to the top of the screen and ground is sticked to the bottom, so it’s not an option to just put a blurred image in the resource folder. The landscape must be composed, dr…

but here it is applying the blur to the whole layer - I just want to:

Take a sprite.
Apply the blur
change the sprite to use the new blurred texture.

I’ve been searching for a while for a solution - any advice will be appreciated.

One thing I noticed while searching for this information is the lack of guidance on this site: I guess because of the rapid changes, there’s no “you should do it like this” more of a “you can do it like this, or this, or this”

e.g. should I use a sprite sheet at all any more - I really don’t know. Obviously I can get around my immediate issue by just loading sprites from file - but is that the best way to do it?

Sorry to go off topic - but with the “should we have paid support” issue I though it a good idea to bring up.

[Victor_K]

You can take a sprite, render it to texture, apply the blur to that texture, save the blurred version and use it later. But in my opinion it’s better to simply make a blurred version in any redactor and add it to spritesheet.

[Maxxx]

You can take a sprite, render it to texture, apply the blur to that texture, save the blurred version and use it later.

Well, that’s what I am doing (except for the ‘saving’ part - I want to use it immediately)
But the problem I am having is that when I get the texture from, the sprite, the texture is the whole sprite sheet, and not just the portion of the sprite sheet for the sprite i want to blur.

But in my opinion it’s better to simply make a blurred version in any redactor and add it to spritesheet.

And if I want to blur the same sprite differently (e.g. blurring more or less depending on some factor) then I should pre-render blurred versions of every frame at every blurred-level? My sprite-sheet would be huge!!