Liquidfun platformer

MoKaLux · April 2020

I am building a platformer template for all to use (pros and noobs alike).
Tell me what you think

https://mokalux.itch.io/gideros-platformer-lf
An example:

	elseif objectName == "lava" and application:getDeviceInfo() ~= "Web" then
		if object.shape == "polygon" then
			myshape = LF_Particles.new(self.world, self.camera, {
				x = object.x, y = object.y,
				coords = object.polygon, rotation = object.rotation,
				tex = "gfx/ui/btn_02_up.png",
			})
		elseif object.shape == "rectangle" then
			myshape = LF_Particles.new(self.world, self.camera, {
				x = object.x, y = object.y,
				w = object.width, h = object.height, rotation = object.rotation,
				tex = "gfx/ui/btn_02_up.png",
			})
		elseif object.shape == "ellipse" then
			myshape = LF_Particles.new(self.world, self.camera, {
				w = object.width, h = object.height, rotation = object.rotation,
			})
		else
			print("*** CANNOT PROCESS THIS SHAPE! line ~134 ***")
			return
		end

Gravity is set to 48 instead of 9.8, Liquidfun is very tricky!
Will post my progress here if you don't mind.
PS: thanks to antix who told me to use Tiled in my platformers as well as providing some code to start off, thanks to rrraptor for his camera

PS2: thanks to ALL of you as well

PS3: viva GIDEROS!

keszegh · April 2020

jumping feels natural, but the movement/running is too slow (maybe i complained about this earlier in another game of yours).

SinisterSoft · April 2020

I just see a white screen? (brave browser)

I can see it on Chrome. Brave works fine for my games though.

MoKaLux · April 2020

(at)keszegh yes I am not too happy with the speed either, I need to refine it. (at) SinisterSoft maybe due to liquidfun? I had to disable liquidfun particles in web because it was lagging too much.

MoKaLux · April 2020

some progress but damn liquidfun is very tricky

For example I have already reached the maximum maskBits which is 2^16 (65536).
Some feedback please

same link: https://mokalux.itch.io/gideros-platformer-lf
Now it has 2 levels but no enemies yet. If you stand near the particles you will see them moving, I will play with particledef later on.
How am I suppose to explain this in a tutorial, that is the question

at keszegh I have increased the speed (both animation and velocity) hope you will like it better?!

Works great on mobile too!
Viva gideros.

MoKaLux · May 2020

I have a bug in my game (please see link above) and I don't have any clue why.
In the demo, the player can move fine on the ladders but he cannot shoot when he is moving diagonally right/down nor when he is moving diagonally left/up!

All other directions are fine.
Do you know what could be the problem?

~~Here is the code for the player control:~~

I have tried many things with no luck, any help would be much appreciated

PEACE.

MoKaLux · May 2020

I found the reason why: keyboard ghosting!
https://drakeirving.github.io/MultiKeyDisplay/
When I press:
- right arrow + down arrow + space bar = key ghost!
- right arrow + up arrow + space bar = OK
- left arrow + down arrow + space bar = OK
- left arrow + up arrow + space bar = key ghost!

So it's my keyboard

The fix is to use another keymaping, for example IJKL + W or WASD + SPACEBAR or even better have some default key and let the user change it if necessary.

Thoracius · May 2020

Very cool.

I noticed a couple issues. If you jump next to a ledge and hold the up key, you do a double-jump. Likewise if you're jumping up through a one-way platform, if you're holding down up it jumps automatically. Also, if you're walking off of a ledge, you can jump in mid-air before landing.

I think the expected behavior in a platformer is that you have to let go of the jump key and push it again while standing on solid ground in order to jump again. Though, I haven't played computer games in a couple decades, so maybe this has changed.

MoKaLux · May 2020

Thanks for the feedback. I am working on it.

MoKaLux · May 2020

Thoracius said:
I noticed a couple issues. If you jump next to a ledge and hold the up key, you do a double-jump. Likewise if you're jumping up through a one-way platform, if you're holding down up it jumps automatically. Also, if you're walking off of a ledge, you can jump in mid-air before landing.

I think the expected behavior in a platformer is that you have to let go of the jump key and push it again while standing on solid ground in order to jump again. Though, I haven't played computer games in a couple decades, so maybe this has changed.

did some progress:
- fixed the double jump

I am working on the building of levels workflow. Right now the process is:
-~~I draw my levels in Gimp so I have the full picture of the level~~
-~~then in Tiled I import the image and draw over it my levels using shapes~~
- I discovered that TILED handles colors so I can build my levels directly in TILED
- then I draw my graphics (mostly tiles) for the levels in Inkscape
- finally gideros automatically mix the Tiled levels and the graphics from Inkscape (using either the pixel or the shape class)

Level design is so important I am trying to find a quick and easy way to build them.
The code in gideros is mostly done (some magic numbers here and there).

~~The last thing I need to work on is AI.~~
Almost there, tell me what you think

Will try to do some tuts either YT or written.

MoKaLux · May 2020

Some more progress

In this one I tried refining the player control with better climbing, better pass-through platform, ...
Almost there

https://mokalux.itch.io/gideros-platformer-lf

MoKaLux · May 2020

here is the source code for the community.
PS: I changed the main player gfx because I am keeping it for myself

Please do not hesitate to ask if you don't understand any part of it.

oleg · June 2020

Not bad

keszegh · June 2020

it plays quite good. probably when you hit an enemy there should be some (more) visual feedback.

MoKaLux · June 2020

some more progress:
- added one more test level
- added bumps
- hurt animations
- fixed my problem with reaching the 2^15 limit for bits and mask bits

Oh la la, what the heck box2d

Almost there?
https://mokalux.itch.io/gideros-platformer-lf

SinisterSoft · June 2020

It's getting fun to play.

MoKaLux · June 2020

I am nearly done with the gideros liquidfun platformer template, am I?
-added some funny anims (hurt and dead)
-reviewed and refactored the code (for example one class had 705 loc now it has 279 loc)
-reintroduced the coins

For this demo I removed the ability for the player to shoot (he needs to jump on the enemies instead)
https://mokalux.itch.io/gideros-platformer-lf

I should post the new project here soon?

MoKaLux · June 2020

this guy is sharing his asset for free
https://itch.io/s/30973/faith-in-humanity-restored-bundle

MoKaLux · June 2020

latest and final

I am not finished yet, there is always stuff to add

but it's a good start for a gideros liquidfun 2d platformer template.

Basialy you draw your levels in Tiled following certain naming convention, you export them and voilà.

Don't hesitate to ask anything regarding this LF platformer template.

beware lots of magic numbers

keszegh · June 2020

i was not able to shoot.
also probably it will be more fun if enemies die easier, like 3 shots at most and jumping on them could kill them instantly. i don't insist on making it a mario-clone but they did many things right there undoubtedly.

oleg · June 2020

keszegh said:
i was not able to shoot.
also probably it will be more fun if enemies die easier, like 3 shots at most and jumping on them could kill them instantly. i don't insist on making it a mario-clone but they did many things right there undoubtedly.

I like the concept of Disney games about Scrooge or chip and Dale -more than the concept of Mario

MoKaLux · July 2020

ah ah, some more progress thanks to gideros community:
https://mokalux.itch.io/gideros-platformer-lf

+ source code a little bit more readable
+ don't hesitate to ask anything

PS: what you get in the code is what is on itch.io at the time of writing
PS2: I have been doing it for 3 months now, I can say from scratch! Conclusion: gideros is fast

PS3: play it full screen

oleg · July 2020

MoKaLux said:

I like how the camera works in the game.
Bullets are very cheating, it is necessary to limit the frequency of shots and their range

rrraptor · July 2020

MoKaLux said:
+ source code a little bit more readable

Sorry, but from my perspective it is far from being at least readable.

The biggest problem at the moment is the naming. Its is not consistent. You are using multiple different styles at the same time. For example:

First, "myappleft" is not readable. It must be changed to my_app_left because you are using underscores later in global constants/variables names. Or to "myAppLeft". And since then you have to name things in same way. Read some articles about "naming in programming" or something like that.

Second, "g_font1" seems to be a global constant. But then I see "G_GROUND", "G_WALL", ... in upper case. It is inconsistent. (small suggestion. If this is indeed constant then it would be better to convert it to a macro in "init.lua" since it is never changing)

One more:

Here it would be better to add newlines because of if statement:

Isn't it looks better?

Project structure also have this poblem.

Folder name is "levels", bet it contains a "BG" class (why it is here? Why its called "BG"?). Same for "tiled_levels" (notices the underscore? Why "tiledmap" or "textfield" in "classes" folder does not have it?

). "menu.lua" does not tell me that its a main menu scene.
Suggestion. If file contains a class with name "MySuperClass", the file name must be the same.

You really need to refactor entire project. I know its hard when its big (I did same thing for my GUI lib. It contains ~30 lua files and I checked every single line), but it is a very important thing. Especially when its public.

MoKaLux · October 2020

some progress on the first level

tell me what you think, still WIP and I promise you rrraptor I won't show my code this time

same link: https://mokalux.itch.io/gideros-platformer-lf

I am planning to do a yt tutorial in french? God's willing.

~~Viva Gideros~~ Gideros rocks

MoKaLux · October 2020

same as above

plus some captures

Effects are from hgy29 https://wiki.gideros.rocks/index.php/Examples#PARTICLES_EFFECT_1_.40hgy29

I am looking forward to building the next levels

LiquidFun

oleg · October 2020

MoKaLux said:
some progress on the first level
tell me what you think, still WIP and I promise you rrraptor I won't show my code this time
same link: https://mokalux.itch.io/gideros-platformer-lf

I am planning to do a yt tutorial in french? God's willing.

~~Viva Gideros~~ Gideros rocks

You have all the graphics in different styles. The game will be much better if the graphics are in the same style.

I sometimes play the game

The game has very simple graphics, but it is made in the same style and therefore the game looks professional.

MoKaLux · October 2020

Thank you oleg for the feedback much appreciated

I will see what I can do for the graphics (I was quite happy with those

)

PS: I prefer agar.io

(level 100)

oleg · October 2020

MoKaLux said:

PS: I prefer agar.io (level 100)

I'm just experimenting with cheats for this game.

Https://github.com/IceHacks/SurvivCheatInjector

Once upon a time I did extensions for browsers on JS, but n after updating browsers a lot has changed. And I try to improve other people's scripts for the sake of my training ..

ps//
To make graphics in one style - download from the Internet a color palette with selected colors that match each other.
https://color.adobe.com/trends/Game-design
Then repaint your sprites using only the colors from the palette
You can use multiple palettes if you don't have enough colors.

MoKaLux · November 2020

sorry guys to bother you, hope you are all doing well

I have got this issue with liquidfun:
- collisions between a static body + a dynamic body = OK
- collisions between 2 dynamic bodies = NOT REALLY OK

It seems 2 dynamic bodies don't collide properly when they are both moving, they overlap

Do you know if that's a limitation of box2d? I have been googling it and didn't find anything regarding this issue.

Any feedback would be much appreciated

thank you.

rrraptor · November 2020

MoKaLux said:
sorry guys to bother you, hope you are all doing well
I have got this issue with liquidfun:
- collisions between a static body + a dynamic body = OK
- collisions between 2 dynamic bodies = NOT REALLY OK

It seems 2 dynamic bodies don't collide properly when they are both moving, they overlap

Do you know if that's a limitation of box2d? I have been googling it and didn't find anything regarding this issue.

Any feedback would be much appreciated thank you.

How do you move dynamic bodies?

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