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pixijs-ticker

Guide PixiJS Ticker delta time usage and update scheduling for per-frame logic.

16|8|Updated May 20, 2020
Search Tags:#ticker#game-loop#pixijs#render-loop#animation-timing#deltaTime#update-priority
One-click install
npx skills add https://github.com/encounterplus/web-client --skill pixijs-ticker-encounterplus
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: pixijs-ticker
Source: https://github.com/encounterplus/web-client/tree/main/.agents/skills/pixijs-ticker
Command: npx skills add https://github.com/encounterplus/web-client --skill pixijs-ticker-encounterplus

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps you implement reliable per-frame logic in PixiJS by using the Ticker’s timing and ordering correctly, avoiding common delta misunderstandings that cause animations to run too fast, too slow, or inconsistently.

Core Features & Use Cases

  • Correct time-step handling: Use deltaTime, deltaMS, and elapsedMS for the right kinds of calculations (frame-rate-independent multipliers vs real-time milliseconds vs raw profiling).
  • Deterministic callback ordering: Schedule updates with UPDATE_PRIORITY so physics, animation, and render-adjacent work happen in the intended sequence.
  • Frame-rate control and stability: Apply maxFPS and minFPS capping to prevent frame drops from producing huge simulation steps.
  • Object-bound per-frame hooks: Use sprite.onRender for per-display-object logic during scene traversal.
  • Lifecycle and rendering control: Understand when to use app.ticker, how app.start()/stop() affect the render loop, and how to manually drive updates via ticker.update() and app.render().

Quick Start

Add an update callback using the Ticker instance parameter to rotate and move a sprite using ticker.deltaTime and ticker.deltaMS, while capping the ticker with app.ticker.maxFPS and enabling a per-object onRender hook for render-adjacent effects.

Frequently Asked Questions about pixijs-ticker

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
Why do my PixiJS animations run too fast or inconsistently across different browser frame rates?▼

PixiJS animations run inconsistently when per-frame logic ignores time deltas. Use the Ticker callback's `deltaTime` for frame-rate-independent multipliers and `deltaMS` for real-time millisecond calculations to ensure stable animation timing.

How do I schedule physics and render updates in a specific order using the PixiJS Ticker?▼

Schedule deterministic update ordering in the PixiJS Ticker by assigning `UPDATE_PRIORITY` to callbacks. This ensures physics stepping, UI animation, and render-adjacent work execute in the intended sequence during the game loop.

What is the difference between deltaTime, deltaMS, and elapsedMS in PixiJS Ticker?▼

In PixiJS Ticker, `deltaTime` provides a frame-rate-independent multiplier, `deltaMS` offers real-time milliseconds for physics stepping, and `elapsedMS` gives raw profiling time since the last update for precise render-loop control.

How do I cap frame rates to prevent large simulation steps during lag in PixiJS?▼

Cap frame rates in PixiJS by configuring `app.ticker.maxFPS` and `minFPS`. This prevents frame drops from producing huge simulation steps, maintaining frame-rate control and physics stability during heavy game loops.

Can I manually drive the render loop instead of using app.ticker in PixiJS?▼

You can manually drive the PixiJS render loop by using `app.ticker.update()` and `app.render()`. This lifecycle control bypasses automatic updates, allowing custom update scheduling and manual rendering alongside `app.start()` and `stop()`.

How do I attach per-frame logic to a specific sprite during scene traversal in PixiJS?▼

Attach per-frame logic to a specific sprite in PixiJS by using the `sprite.onRender` hook. This object-bound callback executes render-adjacent effects during scene traversal without adding a global Ticker callback.

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