diff options
| author | Alec Thomas <alec@swapoff.org> | 2013-08-18 11:33:27 -0400 |
|---|---|---|
| committer | Alec Thomas <alec@swapoff.org> | 2013-08-18 11:33:27 -0400 |
| commit | b0fe85294568485b1cd06afa0e9ab9b7b0beea62 (patch) | |
| tree | 428498e013351eaaad728bd1d1cb66a1872338f4 /CHANGELOG.md | |
| parent | 85acbac9ef2838926e367fbd82ca5964668744d0 (diff) | |
Destroying an entity correctly invalidates all other references.
Diffstat (limited to 'CHANGELOG.md')
| -rw-r--r-- | CHANGELOG.md | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/CHANGELOG.md b/CHANGELOG.md index 89c92d8..acc0008 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,5 +1,11 @@ # Change Log +## 2013-08-18 - Destroying an entity invalidates all other references + +Previously, `Entity::Id` was a simple integer index (slot) into vectors in the `EntityManager`. EntityX also maintains a list of deleted entity slots that are reused when new entities are created. This reduces the size and frequency of vector reallocation. The downside though, was that if a slot was reused, entity IDs referencing the entity before reallocation would be invalidated on reuse. + +Each slot now also has a version number and a "valid" bit associated with it. When an entity is allocated the version is incremented and the valid bit set. When an entity is destroyed, the valid bit is cleared. `Entity::Id` now contains all of this information and can correctly determine if an ID is still valid across destroy/create. + ## 2013-08-17 - Python scripting, and a more robust build system Two big changes in this release: |