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Mindustry Compiler

Mindustry Compiler is an open-source C-style compiler for the game Mindustry. You can write basic C-style programs in your favorite code editor, and the program will compile it into assembly-like language that is compatible for the logic processors in game.

To use it, create a .cpp, .c, or .txt file in your text editor of choice. Then, click the Open button at the top of the Mindustry compiler.

As you change the source file, and when you switch focus into Mindustry, the Mindustry compiler will automatically compile the contents of your source file into your clipboard.

When you switch into the game, a compilation overlay will breifly appear. Select a logic processor and select 'Import From Clipboard'.

... and then you're all set!

Features

• C-style programming
• Automatic compilation to clipboard
• Program structure flexibility
• Arithmetic parsing
• Memory cell access (cell2[i])
• Branching (if, else if, else)
• Loops (for, while, etc.)
• Custom function definitions
• Built-in sleep() and wait() functions
• Direct assembly injection (asm())
• Preprocessor #defines

Overview and Syntax

Program Structure

---

Compiled programs can use either a basic one-shot script structure, or an advanced main loop, which separates initialization from the body of the program.

Basic Script: The program is run from beginning to end, then restarts (all variable values are lost).

Advanced Script: Code outside main is run once. Then, the main loop repeats indefinitely (variable values are kept).

Basic Structure Example

// This is a simple program
conveyor1.enabled = false;
sleep(2);
conveyor1.enabled = true;
sleep(1);

Advanced Structure Example

// Initialization (outside main runs on start)
i = 0;

// Main function (loops forever)
void main()
{
	i++;
	println(i);
	sleep(1);
}

Typenames

---

Typenames are ignored.

// Type names do not matter (left in for C-style compatibility)
static const volatile int number = "hello world";
println(number);
// prints 'hello world'

// Python style-compatible (assign, no declare/typename)
myStr = "hello";

Return

---

Return either exits a custom function, or ends program execution (if elsewhere, eg. inside main() )

void myFunction()
{
	return i + 55;
}

// Initialize code
int i = 5;

// Main loop
void main()
{
	print(myFunction());
	
	// Restart program (equivalent to 'end')
	return;
}

Basic Functions

print(value, value2, value3, ...)

println(print(value, value2, value3, ...)

printflush( target (optional) )

Note: If a print command is compiled, the compiler will automatically append a printflush to the end of the program/end of main() to message1. You can still call the function directly though.

// Appends a value to the print output (optionally with a line end)

print("Right now, ");
println("'x' is currently equal to ", x);
printflush(message2);
sleep(2);
print("all done");

// Output: "Right now, 'x' is currently equal to 5" to messageblock 2
// Then, 2 seconds later, "all done". The compiler will automatically flush the message to message block 1.

Wait

wait(condition)

// Stop program execution until a condition is met.
  
println("Container is full!");
  
// Pause until container is empty ...
wait(container1.totalItems < 25);
println("... but now its empty.");

// Pause until container is full ...  
wait(container1.totalItems > 275);
println("... aaaand its full again.");

Sleep

sleep(seconds)

// Stop program execution for a number of seconds.

// Sleep for 3 seconds
sleep(3);

// Sleep for 1.25 seconds
x = 1.25;
sleep(x);

asm

// Add assembly instructions directly using 'asm()'

// Print 'hello world' to 'message3'
asm(print "hello world");
asm(printflush message3);

// Turns conveyor1 off
asm(control enabled conveyor1 0);

Math Functions

// Add, subtract, parenthesis, exponent
result = a + (b - d) * 2^3;
result += 1;
result *= 2;
result /= 7.5;

// Modulo-division
result = (x + 4) % 25;

// Trig functions
result = (sin(x) * cos(y)) / tan(z);

// Floor/Ceil (outputs '2' and '4')
result = ceil(2.1)
result = floor(4.9);

// Min/max functions
x = min(1, 2);
z = max(3, 100000);

Enum Definitions

Note: Enum types are interpreted as int constants. They follow C-style behavior, where each successive element is the increment of the last

// Enum definition
enum StateEnum
{
	Starting,	// equals 0
	Going,		// equals 1
	Ending,		// equals 2
	Invalid = -4,	// Explicit value equals -4
	Error,		// equals -3
	Explode,	// equals -2
}


// Initialize state (to 0)...
myState = StateEnum::Starting;
	
// Main loop
void main()
{
	// Do enum-based behavior
	switch(myState)
	{
	case StateEnum::Starting:
		println("State is starting");
		printflush();
		myState = StateEnum::Going;
		break;

	case StateEnum::Going:
		println("Going...");
		printflush();
		myState = StateEnum::Explode;
		break;

	default:
		println("EXPLODE");
		printflush();
		myState = StateEnum::Starting;
		break;
	}
	
	sleep(1);
}

Logic (Branch, Loop)

If /Else-if/Else

// Standard if/else-if/else logic.
if (a == 25)
{
	i++;
	println("a equals", 25);
}
else if(b < c - d && e == 2.71)
	println("something else is happening here");

else
{
	i = 0;
	println("else block. i now = ", 0);
}

Switch

// Create enum (some compile-time constants)
enum MyEnum
{
	NormalCase = 3,
	SpecialCase = 25,
}


// 'x' is a variable value ...
// All 'cases' must be compile-time constants
// Use 'if' for variable-cases instead
switch(x)
{

// If x==1 ...
case 1:
	conveyor1.enabled = false;
	break;

// If x==2 ...
case 2:
	conveyor1.enabled = true;
	break;

// Fall through supported (no break between cases)
case MyEnum::NormalCase:
case MyEnum::SpecialCase:
	println("x is either Normal or Special");
	break;
	
// Default case (if all others aren't true)
default:
	println("yeah, x is something else");
	break;
}

While/Do-While Loop

// While loop
while (conveyor1.totalItems == 0)
{
	i++;
}


// Do-while loop
do
{
	x += 3;
	println("x ain't 75");
	printflush();
} while (x != 75);

For Loop

Note: typenames (eg. int i) are ignored by compiler (left in for C-style compatibility)

// Counts from 0 -> max - 1
for (int i = 0; i < max; i++)
{
	println("Current value: ", i);
}

Memory Cells

// Read/write to memory using standard array notation.
// If a cell # is not specified, default is 'cell 1'

// Write '10' to cell at index '0'...
cell[3] = 10;

// Add into cell 4 (index 'x + 2') whatever cell 6 has at index '31'
cell4[x + 2] += cell6[31];

// Fill cell-5 up with numbers 0 -> 9 ...
for (int i = 0; i < 10; i++)
{
	cell[5] = i;
}

Object Control (Conveyors, Unloaders, etc.)

// Get or set properties objects using dot-properties.
// (equivalent to 'control/sensor' commands)

// Turn conveyors/buildings on or off
conveyor1.enabled = false;
driver3.enabled = x > 3 && y - 2 == 1;
	
// Wait for 'vault1' to get some copper ...
wait (vault1.copper >= 25);

// Set the 'type' of an unloader ('type' auto-remaps to 'config')
unloader1.type = @copper;
unloader2.config = @titanium

// print the amount of silicon in 'vault1' ...
println(vault1.silicon);
	
if (vault1.totalItems < 5)
	println("your vault is empty bruh");

Preprocessor

// C-style preprocessor defines (primative implementation)

// Tell compiler to replace 'Q' with 'cell[35 + x]'
#define Q cell[35 + x]

x = 2;
Q = 3 * x;
println(cell[35 + x]);
// prints '6';
	
// Redefine 'Q' ...
#define Q println("hello world")
Q;

// Undefine 'Q' ...
#undef Q

// Define a preprocessor function 'SHOW()'
#define SHOW(OBJ, RES) println("Amount of ", RES, " = ", OBJ.RES)
SHOW(conveyor1, silicon);

Custom Function

Main function

The main loop of the funciton. Loops forever. Calling return in main will 'end' the program, starting it over (re-initialize).

Custom function definitions

// Custom function declaration
void doCustomThing(number, string)
{
	// Print the string and double the number
	number *= multiplier;
	println(string, ": ", number);

	// Return the multiplied number
	return number;
}

// Main loop
void main()
{
	// Set multiplier (vars inside custom function*)
	multiplier = 50;
	result = doCustomThing(4, "A string");
	println(result);
	// prints '200'
}

Note on functions:

• Functions can call return to exit the function, or return x to return a value out of the funciton. Note: the returned value is undefined in functions that do not return.

void returnNoting()
{
	return;
}

int returnANumber()
{
	return 100;
}

• Pre-defined variables with the same name as parameters are saved. Defining a variable num in the main loop, then calling a function with a parameter named num will not overwrite the main function's version. However, any variables that do not share names with a parameter are modifiable.

// Funciton with parameter named 'num'
void doThing(num)
{
	num = 42;
	
	// Print 'doThing's version of 'num'
	println(num);  // prints '42'
}

// Main loop
void main()
{
	// Set 'main's variable 'num' to 5 ...
	num = 5;
	doThing(num);
	
	// Print 'main's version of num
	println(num); // prints '5'
}

• Functions calls are not recursive compatible. That is to say, calling a custom function from inside another function is not supported (yet). This is planned to be added.

void first()
{
	println("first");
}

void second()
{
	// Calling first will get stuck
	first();
	println("second");
}

second();
println("done");