Working Raycasting example! WolfenLöve 3D if you will...

[jfroco]

Excellent!!!

I found mine, but is far away from yours.



After finishing the sprites, please implement floor casting... as far as I remember I couldn' make it.

Best regards

JF

[Jasoco]

What's floor casting? I assume it means put textures on the floor. I don't know how easy that would be since Löve can't manipulate (warp) an image's corners to an odd non-parallelogram shape. If it could, we'd be able to do so much more 3D stuff. For now the floor will have to be solid colored. (Static that is. In that it never changes)

Also, yours looks pretty good too. What's wrong with it?

Anyway, a few bugs right now. But thankfully nothing seriously extreme like a Cool Ranch Dorito.

[Robin]

The ONLY way to get sprites to show up in the right order is to have them sort themselves by how far they are. And in order to make them also sort behind walls you need to add every strip of the wall to the same table. Then sort the table so the far wall strips, far sprites all draw in order from far to near.

Oh, like that.

How did you end up implementing it?

I would have either made a table of indices and sort that or change the indices to 1 to n.

[Jasoco]

It all fell into place when I figured out certain things. Right now, each sprite and each strip is placed into a table with a Z value of their distance from the player. The wall pieces are added first. This fills up 0 through the number of strips - 1, then the sprites are added at the end. Next they're sorted by Z. Then it draws each "object" in the "drawPool" in the order they are sorted into.

Then I use a simple:

Code: Select all

table.sort(T, function(a, b) return a.z < b.z end)

It works for me. I know you say it's not trustworthy or reliable, but why would it exist if it isn't?

Knock on wood that I don't find a speed bump that totally ruins it.

I want to experiment with lighting. Maybe figure out a way to actually put lighting on the floors and draw the floor as a grid at least so I can make each one a different light level. Maybe get some pseudo lighting effects.

[Robin]

It works for me. I know you say it's not trustworthy or reliable, but why would it exist if it isn't?

Huh? The only problem I have with that is that table.sort only looks from index 1 to #T, so T[0] stays at the zeroth index, no matter its z-index.

[Jasoco]

It works for me. I know you say it's not trustworthy or reliable, but why would it exist if it isn't?

Huh? The only problem I have with that is that table.sort only looks from index 1 to #T, so T[0] stays at the zeroth index, no matter its z-index.

Okay. Good. That's probably why it works. I made sure to throw everything into the pool in order without gaps. Hooray for me!

Here's a new shot.
> In this one you can see a sort of lighting effect. I made it so you can set an ambient "fog" for distant objects where the further away the darker they are. If you set the light high, it's barely noticable. Set it low and things get dark fast.
> I also made it so sprites have an "illumination" flag that causes them to be 100% bright no matter how far they are. I set it to the lamp in this shot.
> I also made it so textures can be much bigger. I resized the walls to 128x128 pixels, but kept them nearest neighbor just so I could put a double-resolution image of Kate there. OBEY HER! (Yes, I am aware I am technically making Kate Hitler here given the context of the graphics used. Pure coincidence, I swear. It was either her or me.)


Still TODO:
> Make it so blocks can have different images on each wall. Wolfenstein didn't even have this. But it would be nice. Note that Kate's block only has her on one side, this is because she only shows up on the Horizontally facing walls, but not the Vertical because each wall texture is split into two parts. One being darker than the other. I simply removed the painting from the darker part.
> Enemies of course. Need to make sure moving objects that aren't on a whole tile still index correctly. They're also going to be harder since currently the game uses a Sprite Grid and only one Sprite can be in a square at once. I'll have to do some fidgeting to figure out how to change it so sprites can overlap.
> More lighting. I want to make it so once I have a hand with a gun or weapon showing, it becomes darker or lighter if I step over a non-solid sprite with the illumination flag set. Also make it so map grid can have lighting flags too that would affect the walls touching it and the objects inside.
> DOORS and SWITCHES and SCRIPTS POSSIBLY!
> Give the player and enemies a radius. Right now the collision detection thinks the player is 1 pixel in size. That make it so you can move right up against a wall or sprite and makes things look weird. Gotta give it a radius of maybe .4 so it takes up 80% of a tile and can still move around. Maybe .3. We'll see.

[bartbes]

As a suggestion for your z-ordering, it's probably easier to keep a sorted list around and insert in the right place than to sort the same list over and over every frame. Or do a full sort, but only in frames in which something changed, should help a lot.

[Nixola]

When will you make LÖVECraft?

[Jasoco]

When will you make LÖVECraft?

There's a big difference between Wolfenstein and MineCraft. In that Wolfenstein is very simple in comparison to the hundreds of thousands of blocks you have to process on every screen every frame in MC. Löve isn't that fast. At least not right now. Plus it doesn't have the right image manipulation functions to do it like Java does. (I wish it did. I want to warp an image to my will!)

As a suggestion for your z-ordering, it's probably easier to keep a sorted list around and insert in the right place than to sort the same list over and over every frame. Or do a full sort, but only in frames in which something changed, should help a lot.

Things change every frame if you move even a pixel. So it's not really as useful as it would be in a game where the map is static.

Right now I get a pretty good framerate even with 640 wall slices.


Semi-related note: Here's a neat video of the original Wolfenstein running on an Apple IIGS: http://www.youtube.com/watch?v=E3uHip1Qr-4

[Nixola]

Can you send me the .love file? I want to see how many FPS can I get, on a netbook...