EXA: Scale up sprites

[Keoni29]

Have you ever wanted to scale up a sprite? Use this AXE subroutine:

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Lbl SPR For(A,0,7 {r5+A}->r6 For(B,0,7 If r6^2 Rect(B*r3+r1,A*r4+r2,r3,r4 End r6/2->r6 End End

Now use this code to call the subroutine:

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1	SPR(x,y,w,h,pic

It uses rectangles of size w,h to display the sprite. I guess this code can be optimized, but it does the job.

For example:

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.SPRITESC [3C42A581A599423C]->Pic1 ClrDraw For(A,2,10 SPR(5,5,C,C/2,Pic1 Pause 300 DispGraphClrDraw End Pause 1000 Return Lbl SPR For(A,0,7 {r5+A}->r6 For(B,0,7 If r6^2 Rect(B*r3+r1,A*r4+r2,r3,r4 End r6/2->r6 End End

I hope you find this information helpful. Please leave suggestions and or questions.

[kindermoumoute]

I suppose that's like Pt-Off() command, you can't draw white pixels ?

Why you didn't use BYTEeBIT command ?

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Lbl SPR For(A,0,7 {r5+A}->r6 For(B,0,7 If r6eB Rect(B*r3+r1,A*r4+r2,r3,r4 End End End

e = exp token.

[DJ Omnimaga]

How fast does this runs by the way? I'm curious if it could be used in-game. I made a scaling routine for 8x8 sprites back then, which, however, used 8x8 plain white or black squares and thus, the bottom and right were weird if I remember. It ran at around 10 fps. Not really useable in a real-time animation, but one person could simply pre-render each instance of zoomed up sprite prior the main game loop then temporarily store them into a buffer and displayed when needed.

[Keoni29]

How fast does this runs by the way? I'm curious if it could be used in-game. I made a scaling routine for 8x8 sprites back then, which, however, used 8x8 plain white or black squares and thus, the bottom and right were weird if I remember. It ran at around 10 fps. Not really useable in a real-time animation, but one person could simply pre-render each instance of zoomed up sprite prior the main game loop then temporarily store them into a buffer and displayed when needed.

I will try to render it 1000 times and see how long it takes.

[DJ Omnimaga]

Ok here was my routine. From what I remember now, I think I actually drew an extra row of white squares below. It was definitively not very reliable, due to erasing stuff below.

http://www.omnimaga.org/index.php?topic=3419.msg39533#msg39533

[Keoni29]

My routine is much quicker since it doesn't scale partially.