Added tweens

1 files changed, 5 insertions, 0 deletions

diff --git a/docs/entities.org b/docs/entities.org
index db5663d..f6e870c 100644
--- a/docs/entities.org
+++ b/docs/entities.org
@@ -18,6 +18,10 @@ Entities in Downstroke are plain Scheme **plists** (property lists) — alternat
 
 This minimal approach keeps the engine lean: your game defines whatever keys it needs. The shared keys listed below are *conventions* for physics, rendering, and animation — use them to integrate with the engine's built-in systems. Custom keys are always allowed.
 
+* Pipeline skips (~#:skip-pipelines~)
+
+The optional key ~#:skip-pipelines~ holds a list of **symbols** naming frame pipeline steps that should be skipped for that entity. The physics module defines the built-in step names (see ~docs/physics.org~). The predicate ~entity-skips-pipeline?~ and the syntax ~define-pipeline~ live in ~downstroke-entity~ so any subsystem (physics now; rendering or animation later if you extend the engine) can use the same mechanism without a separate “core pipeline” module.
+
 * Creating Entities
 
 There is no ~make-entity~ constructor. Create an entity as a plain list:
@@ -109,6 +113,7 @@ The engine recognizes these standard keys. Use them to integrate with the physic
 | ~#:gravity?~ | boolean | Whether gravity applies to this entity. Set to ~#t~ for platformers (gravity pulls down), ~#f~ for top-down or flying entities. Used by ~apply-gravity~. |
 | ~#:on-ground?~ | boolean | Whether the entity is touching a solid tile below (set by ~detect-ground~). Use this to gate jump input: only allow jumping if ~#:on-ground?~ is true. |
 | ~#:solid?~ | boolean | Whether this entity participates in entity-entity collision. If ~#t~, ~resolve-entity-collisions~ will check it against other solid entities. |
+| ~#:skip-pipelines~ | list of symbols | Optional. Each symbol names a physics step to skip for this entity (e.g. ~gravity~, ~velocity-x~). See ~docs/physics.org~. |
 | ~#:tile-id~ | integer | Sprite index in the tileset (1-indexed). Required for rendering with ~draw-sprite~. Updated automatically by animation (~animate-entity~). |
 | ~#:facing~ | number | Horizontal flip direction: ~1~ = right (default), ~-1~ = left. Used by renderer to flip sprite horizontally. Update when changing direction. |
 | ~#:tags~ | list of symbols | List of tag symbols, e.g., ~'(player solid)~. Used by ~scene-find-tagged~ and ~scene-find-all-tagged~ for fast lookups. |