afunai [Lexaloffle Blog Feed]

WIP: Bouncing balls

Sat, 30 Dec 2023 05:08:02 UTC

I'm making a little physics engine nowadays. This test stage (unlike pinball games, the balls usually jam in the end, between randomly generated walls) is pretty hard one to handle. There still are a lot of unpredictable behaviors...

print() + rotate + zoom

Wed, 08 Nov 2023 11:37:47 UTC

simiyuhomu

by afunai

[Click to Play]

My first computer (Fujitsu FM-7, in the early 80s) had a BASIC command called 'symbol()', which allowed drawing text as graphics instead of print() to character RAM. It was incredibly slow (I could watch it draw from the top to the bottom) and could only do integer ratio zoom, but we absolutely loved the command...
This small snippet is my attempt to revive it in PICO-8.

EDIT: I've added 'scale_x' and 'scale_y' parameters. When given negative values, the text is flipped.

WIP: 15 Picture Puzzle

Wed, 01 Nov 2023 23:26:51 UTC

niporubuko

by afunai

[Click to Play]

My two-week trip is coming to an end. While I was in my hotel room, I worked on this small puzzle game. There are still many things to do (including adding more girls, of course. It will allow for about 4 - 5 additional images).

Progress: 128x128 images in 60fps (repository opened)

Sat, 21 Oct 2023 05:47:48 UTC

pen_slideshow231021

by afunai

[Click to Play]

Hi,
Further enhancements to the compression format (10-20% smaller, especially in photos), and about 2x faster image rendering.
I made the repositories public, pls give them a try :)

The encoder: https://github.com/afunai/pen_encoder
The decoder: https://github.com/afunai/pen_decoder
The slideshow: https://github.com/afunai/pen_decoder/tree/slideshow

Color profile

Tue, 17 Oct 2023 18:18:55 UTC

I've decided to use chroma.js (https://gka.github.io/chroma.js/) to obtain palette colors that are closer to what the human eye perceives. This greatly improves the accuracy of the original colors. Now my photo of supper looks delicious...

My little encoder: some images from full color

Sun, 15 Oct 2023 12:43:23 UTC

yazuyerizo

by afunai

[Click to Play]

Tiny slideshow of some hard-to-encode full-color images. Composite colors work well, but they still generate very large data.

Progress: Two 128x500px images at once

Sat, 14 Oct 2023 08:49:57 UTC

ayano231014

by afunai

[Click to Play]

So far so good. Better virtual colors, fetching transparency info (alpha) from original images, clipping, and locating.
Performance is still poor (drawing two 128x500px images at once cause some frame drops, and (sometimes) outOfMemory).

Day 2 with PICO-8

Wed, 11 Oct 2023 17:23:57 UTC

Wrote logic for encoding custom draw palettes, and additional 48 color virtual palette (by tiling) for my little encoder.
The tiling needs a lot of fine-tuning per an image, but I begin to know how...

Hello World

Tue, 10 Oct 2023 15:45:17 UTC

Before I make anything fun, I need an image format (and encoder/decoder) which works on PICO-8.
And yeah, I LOVE reinventing THE WHEEL...
It's the result of my first day with PICO-8. I wrote the encoder in Javascript, which I wlll release somewhere.

pen_test

by afunai

[Click to Play]