Saturn91 [Lexaloffle Blog Feed]

circle_collision_example

Sat, 30 Mar 2024 10:25:54 UTC

circle_collision_example

by Saturn91

[Click to Play]

This is a simple example on how circle collision works.

All you need from this cartridge is the function:

function circ_col(c1, c2)
  local dx = c1.pos.x - c2.pos.x
  local dy = c1.pos.y - c2.pos.y
  local distance = sqrt(dx*dx + dy*dy)
  return distance <= (c1.r + c2.r)
end

If you want to check if two circles are colliding, you simply pass them as parameters c1 and c2 see an example bellow:

c1 = {
    pos={x=64,y=64},
    r = 4 --size the radius would have to be for a 8x8 sprite
}

c2 = {
    pos={x=70,y=70},
    r = 8 --size the radius would have to be for a 8x8 sprite
}

collides = false

function _update()
   collides = circ_col(c1, c2)
end

function _draw()
   cls()

   if collides then 
      print("colliding",4,4,11)
   end

   --draw the circles here - mind you in most projects you woudn't, usually you would have them invisible and have them
   --at the same position (or slightly offsetted) as your player
   --i would recommend drawing them anyway at the start to see that the are always where they are supposed to be
   circ(c1.pos.x,c2.pos.y,c1.r,11)
   circ(c2.pos.x,c2.pos.y,c2.r,8)
end

function circ_col(c1, c2)
  local dx = c1.pos.x - c2.pos.x
  local dy = c1.pos.y - c2.pos.y
  local distance = sqrt(dx*dx + dy*dy)
  return distance <= (c1.r + c2.r)
end

Untitled

Fri, 22 Mar 2024 15:44:00 UTC

handy_timer

by Saturn91

[Click to Play]

A handy timer for a class I will hold on pico8. Screensaver in the Background is not by me but by: @Fortyseven

handy_timer

by Saturn91

[Click to Play]

Rabbits first game

Tue, 06 Feb 2024 21:23:12 UTC

rabbits_first_game

by Saturn91

[Click to Play]

This is the first game made by rabbit, my german friend.

A dicy boss fight

Mon, 25 Jul 2022 10:24:59 UTC

a_dicy_boss_fight

by Saturn91

[Click to Play]

# A dicy boss fight
Oh no! All the bosses of our past video games have decided to fight us :S Please help us defeating them!

how to play:

Roll the dice to fight each boss. The damage dealt depends on the dice results. You can re-roll a few dice per round. But beware, the opponent does the same! After defeating the boss, you can swap one die with the opponent. There are different dice, try to collect the best ones! Roll combos to get bonuses.

controls:

x: X on keyboard
o: C on keyboard
use arrow keys to select dice and options

about:

made in about 24h for the GMTK Jam 2022
made with pico-8
made by saturn91 and EinsteinsErbe

apocalypse_dog

Fri, 11 Mar 2022 16:51:53 UTC

apocalypse_dog

by Saturn91

[Click to Play]

MAde within less than 10h coding and development time :D for a mini jam, not best, not my worst.

Untitled

Wed, 20 Oct 2021 10:11:45 UTC

saturn91sparticles

by Saturn91

[Click to Play]

This is an example for an easy to use particle system.

to use it in your own cartridge do the following: copy the code in tab1 into one of your code tabs

Use it in the project as follows:

function _init()
    init_particles()
end

function _update()
    update_particles()  
    if btnp(🅾️) then
        particle_burst(
            {x=63, y=63},   //pos on screen
            10, //num of particels
            2,  //life time (in sec)
            0,  //form 0=rnd 1=pixel,2=circles,3=rect
            2,  //size
            3,  //color
            2   //speed of particles
        ) 
    end
end

function _draw()
    cls()
    draw_particles()    
    print("press 🅾️ for burst", 32, 40, 7)
end

traffic_jam

Thu, 08 Jul 2021 22:13:04 UTC

traffic_jam

by Saturn91

[Click to Play]

Yes it is your typical Snake. With some dramatic music and prorgammed in Pico8.

Controls as usual:

Arrows: movement
x and c anything else

Satelite-Catcher

Thu, 01 Jul 2021 15:27:47 UTC

satelite_catcher

by Saturn91

[Click to Play]

Satelite Catcher

You are a space mechanics whos job it is to bring back damaged satalites. But beware of the explosions arround you.

Don't ask the pilot where the explosions come from... He has no clue

Version 6: improved Game ending and colisions

saturn91devilskitchen_1

Mon, 31 May 2021 08:03:37 UTC

saturn91devilskitchen_1

by Saturn91

[Click to Play]

The Game

You are one of the devils many servant and have to feed him in time. And your workshedule is litarly hell!! Can you make it trough your shift?

How to Play

It is a combination of cocking and Platforming. You can beat the 20 Levels one after an other or in a pretty challenging Speedrun mode.

You start with 3 Health, if you get damaged you can refill your health by eating some of the food, but the Master does not like this :D.

Details

This is the Release version of my Game Devil's Kitchen :D I programmed it on and off between february 2021 and Mai 2021. The deepest barebone mechanics are loosly based on this Video by the youtuber Nerdy Teacher

All in all he has some great videos for beginners to offer but especially the platformer series is genius!

Have fun :D

Get more like this on Saturn91.dev

devil_s_kitchen

Sun, 14 Mar 2021 21:29:34 UTC

devil_s_kitchen

by Saturn91

[Click to Play]

You are the devil'c cook and you are busy. This job is litarly hell. Have I already mentioned that the devil gets angry if you are not fast enough?

Be quick, be fast - HE is hungry!!

(first 15 Levels implemented)

Energy not included

Tue, 08 Dec 2020 21:50:51 UTC

saturns91_energy_not_included

by Saturn91

[Click to Play]

A small game made within a week for the "Major Jam 3 - Retro" limitations: 96x96

thevoid_saturn91_v1_1

Tue, 24 Nov 2020 20:30:29 UTC

thevoid_saturn91_v1_1

by Saturn91

[Click to Play]

thevoid_saturn91_v1

Sun, 22 Nov 2020 08:36:32 UTC

thevoid_saturn91_v1

by Saturn91

[Click to Play]