¶ ? Introduction to Using Transformation Matrices in League VFX
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
| Ritobin | to convert .binfiles to .pyfiles for editing. |
| Visual Studio Code | to edit code |
¶ ✏️ Written Guide
¶ ? How Matrices Work
Transformation matrices are a mathematical way to handle:
- Translation (moving)
- Rotation
- Scaling
Video from GuiSai
¶ 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 Particlesystem
(Completly mirrors a particlesystem.)
Transform: mtx44 = {
-1, 0, 0, 0
0, 1, 0, 0
0, 0, -1, 0
0, 0, 0, 1
}