Matrix Scaling

This guide explains how to use transformation matrices to scale, move, and rotate custom particles in League of Legends modding. It is based on a system commonly used in 3D rendering and adapted here for particle manipulation.

Required Tools

Written Guide

How Matrices Work

Transformation matrices are a mathematical way to handle:

• Translation (moving)
• Rotation
• Scaling

Step 1 – Adding a Default Matrix

First, you'll add a default matrix at the end of your VfxSystemDefinitionData block. This default matrix doesn't change anything; it simply acts as a placeholder.

Example:

Transform: mtx44 = {
    1, 0, 0, 0
    0, 1, 0, 0
    0, 0, 1, 0
    0, 0, 0, 1
}

This keeps your transformation "neutral" — no scaling, moving, or rotating by default.

Step 2 – Editing Size (Scaling Particles)

Decreasing Size (Shrink)

To make a particle smaller, use values below 1.

Example (2× smaller):

Transform: mtx44 = {
    0.5, 0, 0, 0
    0, 0.5, 0, 0
    0, 0, 0.5, 0
    0, 0, 0, 1
}

Increasing Size (Enlarge)

To make a particle larger, use values greater than 1.

Example (2× or 4× larger):

Transform: mtx44 = {
    2, 0, 0, 0
    0, 2, 0, 0
    0, 0, 2, 0
    0, 0, 0, 1
}

Step 3 – Moving the Particle (Editing XYZ Positions)

You can move a particle along specific axes by changing values in the last row of the matrix.

Moving Up (Y-Axis)

Move the VFX upward:

Transform: mtx44 = {
    1, 0, 0, 0
    0, 1, 0, 0
    0, 0, 1, 0
    0, 250, 0, 1
}

(Moves 250 units up.)

Moving Sideways (Z-Axis)

Move the VFX left or right:

Transform: mtx44 = {
    1, 0, 0, 0
    0, 1, 0, 0
    0, 0, 1, 0
    0, 0, 250, 1
}

(Moves 250 units along Z.)

💡 Tip: You might need to test and tweak values to get the exact placement you want!

Mirror Particle System

To completely mirror a particle system:

Transform: mtx44 = {
    -1, 0, 0, 0
    0, 1, 0, 0
    0, 0, -1, 0
    0, 0, 0, 1
}