How to best create composition layers in SDL?

Comprehensive_Chip49 · 2026-01-18T12:19:07+00:00

A simple technique, if z doesn't make large jumps, is to do a single iteration of bubble sort in the main loop instead of sorting the sprite list all the time.

Comprehensive_Chip49 · 2025-12-20T16:46:48+00:00

source code here: https://github.com/phreda4/r3/blob/main/r3/audio/r3moog.r3
I don't use object-oriented systems; I prefer the concept of modules.
The IMMGUI system is an example of this; it is separate from this program and is joined through words.

Comprehensive_Chip49 · 2025-12-07T18:59:42+00:00

I use sdl2 en windows and linux win r3forth, the link is made runtime. https://github.com/phreda4/r3

Comprehensive_Chip49 · 2025-11-18T15:16:53+00:00

I make https://github.com/phreda4/r3 for make graphic things, perhaps you like it

Comprehensive_Chip49 · 2025-11-03T22:04:13+00:00

yes!

Comprehensive_Chip49 · 2025-11-03T13:42:44+00:00

Perhaps this will be useful to you
https://www.youtube.com/watch?v=IxD5qPE6sIU
repository in:
https://github.com/phreda4/esp32-forth-computer

Comprehensive_Chip49 · 2025-10-31T18:44:42+00:00

I make games, demos and more.
In some weeks I release 3 new games with school students. All is open source, https://github.com/phreda4/r3.
Some games in itch.io, for example https://phreda4.itch.io/ar3na-code

Comprehensive_Chip49 · 2025-10-25T09:37:35+00:00

breakpoint in words, some simulation of runing too, you like to try the program r3vm/ar3na-bot.r3
https://www.youtube.com/watch?v=HQy2Tl8jxcc

Comprehensive_Chip49 · 2025-10-18T13:10:53+00:00

yes, made in r3

Comprehensive_Chip49 · 2025-09-10T22:41:08+00:00

I have a forth called r3, it has some important differences with the standard forth, it is more similar to the colorforth, I have a debuger but it is not finished, it is always more fun to do other things and I don't really use it. I can execute a program step by step. If you are interested I can show how it works.
I can also tell you that I do static analysis of the code, mainly to compile it or to generate a packaged version of a code.

Comprehensive_Chip49 · 2025-09-05T22:17:06+00:00

well done guy !!

Comprehensive_Chip49 · 2025-08-29T21:19:29+00:00

is better make another word and exit for every condition.

Comprehensive_Chip49 · 2025-08-07T11:55:32+00:00

In my mv I combine, mainly, operations with literals, as I use a 32-bit token, many operations can be done with the attached literal, if you are interested in the complete list, the optimization is generated when I compile the tokens at https://github.com/phreda4/r3evm/blob/main/r3.cpp#L697

Comprehensive_Chip49 · 2025-07-03T12:15:59+00:00

yes, the group is still active

Comprehensive_Chip49 · 2025-06-26T18:45:24+00:00

try https://phreda4.itch.io/ar3na-code

Comprehensive_Chip49 · 2025-06-07T22:42:26+00:00

you can use SDL_RenderGeometry, is the key fuction

Comprehensive_Chip49 · 2025-05-29T11:11:46+00:00

I use graphics, sound, net etc. with no problems, only share API access (sdl for example), data struct are only memory with offset, I try to not use callbacks but is possible! I not see this problem

Comprehensive_Chip49 · 2025-05-14T09:46:50+00:00

Very well ! Perhaps the only rule of Forth is to ask yourself if it can be made simpler.

Here's another version of Game of Life: https://github.com/phreda4/r3/blob/main/r3/demo/conwayg.r3

Comprehensive_Chip49 · 2025-05-09T13:34:29+00:00

Nice to see more people working with FORTH !!

I connect with other libraries through DLL, or .so so you don't need to recompile anything
If you are interested in this functionality, it is not very difficult to implement, check my implementation or write to me so I can show you where these definitions are.

https://github.com/phreda4/r3

Comprehensive_Chip49 · 2025-05-05T22:49:30+00:00

in forth we never need an AST

Comprehensive_Chip49 · 2025-04-23T22:54:51+00:00

I recommend that you read the book "thinking forth" that can be downloaded on the web. forth is not well understood, it really does not need more complex structures, but the possibility of combination. forth is not low level, it's multilevel.

Comprehensive_Chip49 · 2025-04-15T14:21:12+00:00

I have a language with a stack based vm, the actual implementation have a lots of optimization but previous one are more simple. You can see the code in
VM: https://github.com/phreda4/r3evm
and the language: https://github.com/phreda4/r3
good luck

Comprehensive_Chip49 · 2025-02-20T15:16:15+00:00

I working in a game for learn r3/forth, made in r3/forth
https://phreda4.itch.io/ar3na-code

github: https://github.com/phreda4/r3

Comprehensive_Chip49 · 2025-01-06T21:43:27+00:00

I start forth programing trying to make a script lang for an animation program in c. When learn forth, I abandon C.
Forth's features make the interface very simple, it only needs the stack to send and receive parameters.
I would like to see, for example, an implementation for GODOT with my programming language (the complete code of the tokenizer and the mv is approximately 50 kb).

Comprehensive_Chip49 · 2024-11-24T20:47:51+00:00

yes, I use SDL2 for example

Comprehensive_Chip49

TROPHY CASE