SOLVED by matchy Is there any "sharp" Polyvector equivalent?

[Cliff3D]

I would like to use something like PolyVector to resize/reshape sprites without getting the blur effect that otherwise smoothes the sprite/bitmap out on my machine. As a crude example, take this code to resize a sprite "Checker.Png":

Code: (glbasic) [Select]

main:
LOADSPRITE "Checker.png", 1
ResizeSprite(1, 2, 512, 512)
SAVESPRITE "Blurry.png",2
END

// ------------------------------------------------------------- //
// ---  RESIZESPRITE  ---
// ------------------------------------------------------------- //
FUNCTION ResizeSprite: SourceSprite%, TargetSprite%, destWidth%, destHeight%
// Uses "virtual screen" 0
// These values are defined LOCAL:
// SourceSprite%,  TargetSprite%,  Width%,  Height%

LOCAL spritewidth%, spriteheight%
GETSPRITESIZE SourceSprite%, spritewidth%, spriteheight%

CREATESCREEN 0, TargetSprite%, destWidth%, destHeight% // create temporary workscreen of desired resolution

USESCREEN 0

//Copy sprite #0 to target sprite and stretch to fit
STARTPOLY SourceSprite% // Bitmap = No.SourceSprite%
  POLYVECTOR  0,   0,  0,  0, RGB(255, 255, 255) // top left
  POLYVECTOR   0, destHeight%-1,  0, spriteheight%-1, RGB (255, 255, 255) // bottom left
  POLYVECTOR destWidth%-1, destHeight%-1, spritewidth%-1, spriteheight%-1, RGB(255, 255, 255) // bottom right
  POLYVECTOR destWidth%-1,  0, spritewidth%-1,  0, RGB(  255, 255,   255) // top right
ENDPOLY

USESCREEN -1 // switch back to main screen
LOADSPRITE "", SourceSprite% // empty source sprite/release memory/resources
ENDFUNCTION // RESIZESPRITE
As you can see from the attached images, the result is slightly blurry - scaling up by more increases the blur factor quite a lot. I beleive this is the cause of some tiling issues in other posts lately.

I'm pretty confident that for just resizing a rectangular area there must be a simple solution, but I'd really like to use PolyVector simply because I relaly REALLY want to be able to resize/reshape random triangles. Any bright ideas? Is there a "set sharpness" function I can use somewhere to effectively turn blurring off?

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[Ian Price]

Have you tried using SMOOTHSHADING FALSE?

[Cliff3D]

Yup! That's the fix that matchy pointed out to me (beating MrTAToad and also you).

I love a helpful community as not being able to find that switch was making me unhappy in a fairly big way this morning

[matchy]

SMOOTHSHADING FALSE is worthy of be subject of.  I had the same issue with my Minecraft clone using small textures and Kitty suggested it in IRC just before the issue was posted.

[Cliff3D]

I've updated the Wikki to put SMOOTHSHADING as a reference in both PolyVector and ZOOMSPRITE commands (I wish I rememberd to do this more often, but I do TRY to do it so that it's easiler to dins related stuff in future).

[Bursar]

Is it a simple on/off toggle for everything, or can you set it to false, draw some stuff, set it true draw some more stuff, and have some sprites smooth, and some not?

[Cliff3D]

You can set it to false, draw some crisp/sharp stuff, then smooth and draw some smoothed stuff

You could resize a whole sprite up using smoothing off for sharp edges, then turn smoothing back on and resize up 1 pixel smaller all around to get a smooth interior.

[matchy]

I had the same issue with my Minecraft clone using small textures...

And here it is: Minecraft clone 

[Kitty Hello]

looking good so far. The collision is a bit jerky. For the vertical stuff I'd put the player always on the rounded value of the block height (if not jumping/falling). You have the advantage of knowing the block positions. Also, don't use X_COLLISION, but do it manually on the lpayer coordinates and the grid array.

[Cliff3D]

It certainly looks interesting (and nice and crisp!) but I feel rather a dunce, not knowing what Minecraft is or what I should be doing

[matchy]

Thanks for checking it out! I figured half way through that I can just use grid calcs for many of the layout and movement and keep the X_3D stuff minimal. Note that is was for fun so I'm not too concerned about finish it but at least fix the bugs and present a iPhone version. Hopefully someone may design glb mc clone terrain builder as discussed on the main Minecraft thread.