A 4d esoteric programming language
| Colour (RGBA) | Action |
|---|---|
| Anything with alpha != 255 | End the program |
| Directional | |
| (255,127,0,255) | Changes the code execution direction to +X |
| (255,127,127,255) | Changes the code execution direction to -X |
| (255,191,0,255) | Changes the code execution direction to +Y |
| (255,191,127,255) | Changes the code execution direction to -Y |
| (255,63,0,255) | Changes the code execution direction to +Z |
| (255,63,127,255) | Changes the code execution direction to -Z |
| (255,255,0,255) | Changes the code execution direction to +W |
| (255,255,127,255) | Changes the code execution direction to -W |
| Maths | Resultant value stored in A |
| (127,127,0,255) | Add the current cell value to A |
| (127,127,31,255) | Subtract current cell value from A |
| (127,127,63,255) | Multiple A by current cell value |
| (127,127,127,255) | Divide A by current cell value |
| (127,127,158,255) | Increment A |
| (127,127,191,255) | Decrement A |
| Storage | See storage notes |
| (63,127,0,255) | Increment the cell pointer |
| (63,127,127,255) | Decrement the cell pointer |
| (63,255,0,255) | Store A to current cell |
| (63,255,127,255) | Load A from current cell |
| (63,255,255,255) | Store a random value into A - From MT19937 |
| (63,255,63,255) | Reset A |
| Equality | When true direction is set to +X, otherwise direction is set to -X |
| (191,63,127,255) | Current cell value == A |
| (191,127,127,255) | Current cell value > A |
| (191,191,127,255) | Current cell value < A |
| (191,127,0,255) | Current cell value >= A |
| (191,191,0,255) | Current cell value =< A |
| (191,255,0,255) | Current cell value != A |
| Functions | See function notes |
| (255,255,255,255) | Run function A |
| (0,0,0,255) | Define function A |
| (255,0,0,255) | End function definition |
| I/O | |
| (255,127,255,255) | Take one character as input and store in A |
| (255,0,255,255) | Print ASCII Character for A |
RGB4D uses a cell based storage system (with a cell pointer and 256 uint16_t cells). It also has an Accumulator (A) which is uint16_t and is used by most instructions which operate on a value
Functions are specified by a number, which is usually passed as A. The parameters for a function should be in the cells including and after the cell denoted by the cell pointer. Functions may also be loaded from an ELF or DLL library (NOTE: This feature isn't required and thus won't be in all interpreters that are made). If a function is loaded from a library then it is numbered as the function's number in that library but with 10000 (This number isn't meaningful in any way, it's just arbritary) added to it.
For storage see storage notes
X, Y and Z are all limited to having a max value of 16. W is limited by the maximum unsigned byte that the target can support (so for a 64bit CPU it'd be 2^64 whilst for an 8bit CPU it'd be limited to 256)
This interpreter is written in C++ and is the 'official' interpreter (as in the language creator made it)