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Yet Another Tilemap and Super Scaler Demo for the Sega 32X

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# Yet Another Tilemap and Super Scaler Demo
Yet Another Tilemap and Super Scaler Demo for the Sega 32X

![image](https://user-images.githubusercontent.com/1173058/148651754-11cb3fbd-5d09-4de7-bf23-469dc957359c.png)

![image](https://user-images.githubusercontent.com/1173058/185707152-72ef304a-cc94-4ff7-a975-050904bfef40.png)

Features
============
- works on real hardware
- draws tilemap of arbitrary size, exported from Tiled
- scrolls in any direction, avoiding redraw as much as possible using the dirty rectangles approach
- uses the hardware screen shift-register for smooth scrolling
- can handle an arbitrary number of clipped sprites
- adjustable clipping region for sprites: see the draw_setScissor call
- uses both CPUs to draw tiles and sprites
- sprites can be flipped on X and Y axis and/or scaled
- "imprecise" rendering: sprites can be scaled using a cheaper and faster algorithm, the X coordinate is also snapped to the nearest even value
- the code also supports flipping of tiles, although the tilemap format would need to be extended for that
- it can handle an arbitrary number of tile layers along with parallax
- the sprites and tiles can be of any size in either dimension, although if you to plan to use scaling, the size should be a power of 2
- sprites can be scaled to an arbitrary size
- support for dedicated sprite tile layers 
- can use the two MD layers as bitmap layers with parallax

Tiled plugins
============

The extensions/ directory contains Javascript plugins for exporting Tilemaps and Tilesets in YATSSD format.

The plugins require Tiled version 1.5 or newer.

[More information on Tiled plugins.](https://doc.mapeditor.org/en/stable/reference/scripting/)

Building
============

**Prerequisites**

A posix system and [Chilly Willy's Sega MD/CD/32X devkit](https://github.com/viciious/32XDK/releases) is requred to build this demo.

**VSCode + Remote Dev Container**

Unless you already have the devkit built, using VSCode with Docker is one of the faster ways to get started. VSCode will offer to set up a Development Container the first time the project folder is opened.

[More information on Developing with VSCode inside a Container](https://code.visualstudio.com/docs/remote/containers)

If you're using Windows 10/11, you must also [install WSL 2](https://docs.docker.com/desktop/windows/wsl/) and Linux distribution before attempting to build from VSCode.

***VSCode settings***

We recommend installing the 'Makefile tools' extension and using the following VSCode settings.json for the project:

```json
{
    "C_Cpp.default.includePath": [
        "/opt/toolchains/sega/sh-elf/include/",
        "/opt/toolchains/sega/m68k-elf/include/"
    ],
    "C_Cpp.default.compilerPath": "/opt/toolchains/sega/sh-elf/bin/sh-elf-gcc",
    "C_Cpp.default.configurationProvider": "ms-vscode.makefile-tools",

"makefile.configurations": [
        {
            "name": "release",
            "makeArgs": ["-j", "release"]
        },
        {
            "name": "debug",
            "makeArgs": ["-j", "debug"]
        },
        {
            "name": "clean",
            "makeArgs": ["clean"]
        }
    ]
}
```

License
============
If a source file does not have a license header stating otherwise, then it is covered by the MIT license.

The demo uses graphical assets from Little Game Engine: https://github.com/mills32/Little-Game-Engine-for-VGA

Credits
============

Original code by Victor Luchitz aka Vic

32X devkit by Joseph Fenton aka Chilly Willy

yatssd

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