Displadium

The mod introduces 2 blocks and 1 item that allow you to build and control your own digital screens. Using a computer, you can program the display and draw anything you want — from simple text to complex graphics.

Features:

Display Block – a screen where your graphics are rendered

Controller Block – connect it to a computer to send code and control the display

Wire Item – connect components using positive (+) and negative (–) wires

With Displadium, you can:

Create custom interfaces and HUDs

Display images, text, or animations

Build your own in-game control panels

Experiment with programming inside Minecraft

The wiring system allows you to connect blocks realistically, requiring proper positive and negative connections to function.

TUTORIAL
Below is the full list of available Lua commands, how they are implemented in the code, and an exact usage example.

All available commands
tick(t, dt) — a function called by the engine every tick. t is time in seconds, dt is the time step adjusted by speed().

point(x, y) — sets the position of a point (x, y) within the 0..1 range.

emit(x, y [, color [, glow [, size]]]) — adds a point to the trail with optional parameters. Supports color as #RRGGBB, a number, or r,g,b.

line(x1, y1, x2, y2 [, steps [, color [, glow [, size]]]]) — draws a line using points. steps is limited to 2..200.

rotline(cx, cy, length, angle [, steps [, color [, glow [, size]]]]) — draws a line using center, length, and angle (in radians).

color(#RRGGBB) or color(r, g, b) — sets the color. r,g,b can be in range 0..1 or 0..255.

glow(value) — brightness, minimum 0.

size(value) — point size, minimum 0.05.

alpha(value) — transparency (0..1).

speed(value) — time speed, minimum 0.05.

trail(count) — trail length (10..400).

subtick(value) — trail interpolation (1..20).

show(true/false) — enables or disables rendering.

time() — returns current time t (with speed applied).

Exact rules and limits
Coordinates x and y are always clamped to 0..1.

Color can be a #RRGGBB string, a number, or three components r,g,b (0..1 or 0..255).

glow ≥ 0, size ≥ 0.05, alpha 0..1, speed ≥ 0.05, trail 10..400, subtick 1..20.

line / rotline: steps is limited to 2..200.

How to use
Connect the computer and display using wires (both + and - must go to the same computer).

Open the computer interface, paste your Lua code into the field, and press "Save".

The script is loaded, and the tick(t, dt) function is called every client tick.

Example (fully accurate and working)
function tick(t, dt) speed(1.0) trail(120) subtick(6) alpha(0.9) glow(1.2) size(1.0) local x = 0.5 + math.cos(t * 1.3) * 0.35 local y = 0.5 + math.sin(t * 1.3) * 0.35 point(x, y) color("#66CCFF") emit(x, y) local angle = t * 2.0 rotline(0.5, 0.5, 0.7, angle, 30, 1.0, 0.5, 0.2) end
How the example works
tick is called every tick, t is time in seconds (affected by speed).

point moves the main point in a circle.

emit adds a trail with the chosen color/brightness.

rotline draws a rotating line around the center.