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Animation System

Source file: client/engine/systems/SystemsFunctions/AnimationSystem.cpp

Purpose: Update animated sprites over time and advance frames.

Components used:

  • AnimatedSprite (animation state, frames, duration)
  • Drawable (sprite, texture)

Behavior​

  • Computes the texture rect to display (SetFrame) based on current frame and frame dimensions.
  • Advances the frame when elapsed time exceeds frameDuration (NextFrame).
  • Honours loop: either wraps or stays on the last frame.
  • If the texture is not ready or animation is disabled, the frame rect is recomputed but frame advancement is skipped.

Main signature​

void AnimationSystem(Eng::registry &reg, const float dt,
    Eng::sparse_array<Com::AnimatedSprite> &anim_sprites,
    Eng::sparse_array<Com::Drawable> &drawables);

Notes​

  • Uses dt (delta time) to accumulate elapsedTime.
  • Supports multi-row/column spritesheets.