Improve ECB behaviour, add ECB interpolation, wall/ceiling support etc (#94)

Reviewed-on: #94
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/fighter/state/air.rs

@@ -134,12 +134,10 @@ pub fn collision_interrupt(
     }
 
     let res = ctx.air_collide_with_stage(can_ignore_soft_platforms)?;
-    let diff = res.hit_position - ctx.translation.0;
-    ctx.ecb.bottom -= diff;
-    ctx.ecb.top -= diff;
-    ctx.ecb.left -= diff;
-    ctx.ecb.right -= diff;
-    ctx.translation.0 = res.hit_position;
+    ctx.translation.0 = res.resolved_translation;
+    let bottom_offset = ctx.ecb.rebase_onto_bottom();
+    ctx.translation.0 += bottom_offset;
+    *ctx.desired_ecb = crate::fighter::ecb::FighterDesiredECB::from(*ctx.ecb);
     ctx.presentation_snap.0 = true;
     ctx.surface.land(res.line_id, ctx.ledge_info);
     Some(FighterState::Land(LandingState::create(landing_type)))