Particularly useful when using [Blender](https://www.blender.org/) as an editor for the [Bevy](https://bevyengine.org/) game engine, combined with the Blender add-on that do a lot of the work for you
Its main use case is as a backbone for the [```blenvy``` Blender add-on](https://github.com/kaosat-dev/Blenvy/tree/main/tools/blenvy), that allows you to add & edit components directly in Blender, using the actual type definitions from Bevy
Particularly useful when using [Blender](https://www.blender.org/) as an editor for the [Bevy](https://bevyengine.org/) game engine, combined with the [Blender plugin](https://github.com/kaosat-dev/Blenvy/tree/main/tools/blenvy) that does a lot of the work for you (including spliting generating seperate gltf files for your static vs dynamic assets)
Once spawning of the actual entity is done, the contents (components, children etc) of the Blueprint will have been merged with those of the entity itself.
// from Rapier/bevy_xpbd: this means the entity will also have a velocity component when inserted into the world
Velocity {
linvel: Vec3::new(vel_x, vel_y, vel_z),
angvel: Vec3::new(0.0, 0.0, 0.0),
},
))
```
### Overriding components specified inside the blueprint
any component you specify when spawning the Blueprint that is also specified **within** the Blueprint will **override** that component in the final spawned entity
HealthPowerUp(20)// if this is component is also present inside the "Health_Pickup" blueprint, that one will be replaced with this component during spawning
))
```
### BluePrintBundle
There is also a ```BluePrintBundle``` for convenience , which just has
- this crate also provides a special optional ```GameWorldTag``` component: this is useful when you want to keep all your spawned entities inside a root entity
You can use it in your queries to add your entities as children of this "world"
This way all your levels, your dynamic entities etc, are kept seperated from UI nodes & other entities that are not relevant to the game world
> Note: you should only have a SINGLE entity tagged with that component !
Blenvy automatically exports a Json file containing of all your registered components/ types, in order to be able to create UIs that allows you to add & edit your components directly in Blender in the [Blenvy](https://github.com/kaosat-dev/Blenvy/tree/main/tools/blenvy) Blender add-on
- The output file will be generated in the ```Startup``` schedule whenever you run your app.
- Every time you compile & run your app, the output json file will be updated.
Ff you enable it on the blender side, Blenvy will be using "material libraries" to share common textures/materials between blueprints, in order to avoid asset & memory bloat:
Ie for example without this option, 56 different blueprints using the same material with a large texture would lead to the material/texture being embeded
Generating optimised blueprints and material libraries can be automated using the [Blender plugin](https://github.com/kaosat-dev/Blenvy/tree/main/tools/blenvy)
```blenvy``` provides some lightweight helpers to deal with animations stored in gltf files
It has both support for blueprint level animations (shared by all blueprint instance of the same blueprint)
* an ```BlueprintAnimations``` component that gets inserted into spawned (root) entities that contains a hashmap of all animations contained inside that entity/gltf file .
* an ```BlueprintAnimationPlayerLink``` component that gets inserted into spawned (root) entities, to make it easier to find Bevy's ```AnimationPlayer``` and ```AnimationTransitions``` components
And instance level animations (specific to one instance)
* an ```InstanceAnimations``` component that gets inserted into spawned (root) entities that contains a hashmap of all animations **specific to that instance** .
* an ```InstanceAnimationPlayerLink``` component that gets inserted into spawned (root) entities, to make it easier to find Bevy's ```AnimationPlayer``` and ```AnimationTransitions``` components for the animations above
The workflow for animations is as follows:
* create a gltf file with animations (using Blender & co) as you would normally do
* inside Bevy, use the ```blenvy``` boilerplate (see sections above), no specific setup beyond that is required
* to control the animation of an entity, you need to query for entities that have both ```BlueprintAnimationPlayerLink``` and ```BlueprintAnimations``` components (added by ```blenvy```) AND entities with the ```AnimationPlayer``` component
this crate also includes automatic handling of lights in gltf files, to attempt to match Blender's eevee rendering as close as possible:
* **BlenderLightShadows** (automatically generated by the gltf_auto_export Blender add-on) allows you to toggle light's shadows on/off in Blender and have matching
behaviour in Bevy
* **BlenderBackgroundShader** aka background color is also automatically set on the Bevy side
* **BlenderShadowSettings** sets the cascade_size on the bevy side to match the one configured in Blender
The main branch is compatible with the latest Bevy release, while the branch `bevy_main` tries to track the `main` branch of Bevy (PRs updating the tracked commit are welcome).
