DrPete [Lexaloffle Blog Feed]

Fizzlefade transition effect

Tue, 29 Aug 2017 16:38:05 UTC

Fizzlefade transition effect

by DrPete

[Click to Play]

I saw a couple of articles earlier about the Fizzlefade effect from Wolfenstein 3D. It's a transition effect that draws over random pixels, but never draws over the same pixel twice.

I thought this was a cool trick, and I wanted to try it out and see it in action, so I implemented the Feistel network technique from antirez's article. Posting here in case anyone likes the effect and wants to recycle the code.

Randomizer Showcase

Sun, 09 Oct 2016 11:17:50 UTC

Randomizer Showcase

by DrPete

[Click to Play]

Sometimes, your game makes use of a randomly generated sequence, but it would be nice to smooth out some of the short-term variance in it (e.g. long stretches of not getting a long piece in Tetris). This cart showcases some algorithms you can use to generate smoother-feeling random sequences, and lets you visualize them for tetrominoes, digits, or dice rolls.

Thanks to TetrisConcept without whom I would never have learned about these techniques, and to the developers who invented them.

See the code comments for more on the implementation of each randomizer.

NumPop

Mon, 22 Aug 2016 03:40:50 UTC

NumPop 1.0

by DrPete

[Click to Play]

A little math puzzle for my first Pico-8 game.

Instructions (see also the in-game demo):
Pop pairs of numbers to gain points. When you pop numbers, you'll gain their units-digit of their sum, e.g:
3 + 5 = +8 points
7 + 7 = +4 points (because 7 + 7 is 14)
9 + 3 = +2 points (because 9 + 3 is 12)
after which, the popped pair is replaced with the result, and a new number is added onto the end. (It'll make sense after you've played.)

As a special bonus, if you would gain 0 points from a move (e.g. 0 + 0 or 8 + 2), you'll instead gain an extra turn.

CHANGELOG:
1.0 [2016-10-13]

state of the art GRAPHICS and ANIMATIONS (well, scrolly bubbles and stuff)
rudimentary sfx
UI improvements
in-game instructions/demo
switch randomizer again, old one was a bit too cyclic
0.0.2 [2016-10-09]
tweak how random numbers are generated to be more even-looking
fix a bug where only the last byte of your high score is saved (use dset/dget instead of poke/peek)
0.0.1 [2016-08-22]
initial version