Any State

7m 25sPublished Sep 25, 2025

SummaryVersion Notes (Draft)

This lesson focuses on the crucial "Any State" node within the Rive State Machine. As animation components grow, managing interconnected cross-transitions becomes an exponential web-line mess. The Any State node acts as a centralized global dispatcher, allowing the machine to instantly and smoothly branch into a target animation from any active timeline, drastically simplifying state architecture and optimizing project scalability.

Any State Mathematical Wiring Reduction Formula: For a graph containing N animation states, enabling complete omnidirectional navigation requires N × (N - 1) individual transition connections. Utilizing an Any State routing schema reduces this layout overhead to exactly N paths, optimizing structural scale from O(N²) down to O(N).
Avoiding the Any State Deadlock:
- The Root Cause: Number and Boolean properties hold their evaluations continuously. As long as the criteria match, the active condition forces the Any State node to re-evaluate every single frame.
- Handoff & Rigging Rules: If an Any State branch leads to a sub-sequence relying on downstream nodes or Exit Time logic, designers must use Triggers rather than properties. A Trigger's micro-instant activation (firing for a single frame before resetting) guarantees that deeper runtime navigation won't be overridden or hijacked.

📌 Key Points

Any State enables transitions from any state, avoiding complex transition webs.

📝 Notes

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Step by Step

00:00:04

Replicating the Linear Transition Bottleneck:

Demonstrate a 3-timeline sequential chain. When trying to jump directly from state 1 to state 3, the machine fails due to missing direct links, proving the tedious need for cross-directional wiring.
00:01:28

Introducing Any State for Scaling:

Using a character's Idle, Walking, and Running animations as an example, position them in the graph and connect them globally out from a single Any State node.
00:02:02

Configuring Global Number Dispatches:

Set the evaluation rules on the three outbound paths from Any State to check if the View Model Property num equals 1, 2, or 3, verifying non-sequential jumps like state 1 straight to 3.
00:02:37

Explaining Interleaved Transition Blending:

Apply custom Transition Durations to the Any State paths, clarifying that keyframes interpolate smoothly because Rive calculates vector vectors directly from the previously active state.
00:03:08

Exposing the Continuous Condition Infinite Loop:

Add a sequential "Rotate" timeline mapped to trigger right after state 3 finishes playing through (Exit Time 100%). Playback reveals a glitch where the object snaps back instantly because num == 3 remains perpetually true.
00:05:46

Refactoring via Transient Triggers:

Delete the persistent number property and create three distinct triggers (trig1, trig2, trig3). Reassign them to the Any State paths to ensure state 3 flows perfectly into the infinite rotation sequence without interlocking loops.
00:07:01

Final State Testing and Lecture Wrap-up:

Verify that the loop carries on endlessly without interruption from Any State. The instructor concludes by emphasizing that only by using a trigger's split-second firing can you ensure sequential timelines stay safely in their designated target states, achieving full closure verification.