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Fixed parentTransform not causing update of child transform

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(also improved performance)
This commit is contained in:
Simon Lübeß
2021-09-02 12:30:18 +02:00
parent 0534824c07
commit c270fdcb03
1 changed files with 15 additions and 10 deletions
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GlitchyEngine/src/World/TransformSystem.bf
+15 -10
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@@ -9,20 +9,24 @@ namespace GlitchyEngine.World
_frame++;
for(var entity in world.Enumerate(typeof(TransformComponent)))
for(var (entity, transform) in world.Enumerate<TransformComponent>())
{
UpdateEntity(entity, transform, world);
}
{
UpdateEntity(entity, world);
}
}
private static TransformComponent* UpdateEntity(Entity entity, EcsWorld world)
private static void UpdateEntity(Entity entity, TransformComponent* transform, EcsWorld world)
{
// Todo: this probably needs a rewrite as it may scale poorly with deep hierarchies!
var transform = world.GetComponent<TransformComponent>(entity);
// If tranform was updated this frame -> skip
// transform was updated this frame -> skip
if(transform.Frame == _frame)
return transform;
return;
transform.Frame = _frame;
var parent = world.GetComponent<ParentComponent>(entity);
@@ -30,7 +34,7 @@ namespace GlitchyEngine.World
{
transform.LocalTransform = .Translation(transform.Position) * .RotationX(transform.Rotation.X) *
.RotationY(transform.Rotation.Y) * .RotationZ(transform.Rotation.Z) * .Scaling(transform.Scale);
transform.Frame = _frame;
transform.IsDirty = false;
if(parent == null)
@@ -41,17 +45,18 @@ namespace GlitchyEngine.World
if(parent != null)
{
var parentTransform = UpdateEntity(parent.Entity, world);
var parentEntity = parent.Entity;
var parentTransform = world.GetComponent<TransformComponent>(parentEntity);
UpdateEntity(parentEntity, parentTransform, world);
// TODO: I think we unnecessarily recalculate world transform every frame
// Parent transform is newer than our transform or was updated this frame
if(parentTransform.Frame >= transform.Frame)
{
transform.WorldTransform = parentTransform.WorldTransform * transform.LocalTransform;
transform.Frame = parentTransform.Frame;
}
}
return transform;
}
}
}