Randomization and Random Seed¶
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⚠️ This is the SplineCraft Demo (evaluation) edition. Every feature works exactly like the full plugin; only how much you can build with it is capped, an on-screen watermark is shown, and it does nothing in Shipping builds. Full list: Demo Limitations.
Randomization settings add a controlled spread of scale, paddings, shift and rotation between
instances. Each parameter is a From..To range; a value is taken uniformly from it.
Spread for sections and tubes (FDemoSCElementRandomSettings)¶
| Parameter | What it varies |
|---|---|
| Scale By Thickness (Y) / Scale By Height (Z) | mesh scale. |
| Left / Top / Right / Bottom Padding | paddings (cm). |
| Shift Horizontal (Y) / Shift Vertical (Z) | offset (cm). |
| Roll Angle (X) | tilt around the element's axis (degrees). |
| Rotate 0 or 180 | a random 0° or 180° turn. |
Spread for posts and knobs (FDemoSCPointRandomSettings, FDemoSCPointKnobRandomSettings)¶
| Parameter | What it varies |
|---|---|
| X / Y / Z Scale | scale per axis. |
| X / Y / Z Shift | offset per axis (cm). |
| Roll (X) / Pitch (Y) / Yaw (Z) Angle | angles (degrees). |
| Flip X / Flip Y | a random 180° turn. |
In Curve mode the Pitch, Yaw and Flip parameters have no effect.
Ignore flags¶
At the mesh-configuration level: Ignore Scaling / Padding / Translating / Rotation Randomization — turn off the corresponding spread group for this particular mesh, without touching others.
Random Seed¶
By default the spread is re-rolled on every rebuild — so two identically configured actors look different, and a variation you liked cannot be pinned down. The Randomization section on the actor solves this:
| Parameter | Purpose |
|---|---|
| Use Random Seed | turn on deterministic mode. |
| Random Seed | the seed: with one seed the structure is built identically every time. |
| Randomize Seed (button, editor only) | pick a new seed and rebuild. |
The seed covers everything: scale, paddings, shift, rotation, Flip and the random mesh choice. By default Use Random Seed is off — the legacy behaviour.
Note. Changing settings that change the number of random draws (adding a section, enabling another randomization) shifts the sequence, so the look at the same seed changes — that is a property of the approach itself.
When it is recomputed¶
OnConstruction— on every property change in the editor.BeginPlay— at the start of play.- At runtime — via
UpdateAfterChangeAnyProperty(), if Mobility ≠ Static (see chapter 10).