Godot Destructibles C#

Used in conjuction with shard meshes to easily create destructable objects.

Requires Godot Mono.

Demo.webm

Usage

1. Install the Cell Fracture addon in Blender, join your mesh and use F3 to search for Cell Fracture. Set the Source Limit to how many RigidBodies you want in your game. (~5 – 50)
2. Select everything, right click and select Set Origin > Origin to Center of Mass (Volume).
3. Export it as a .ojb or GLTF, import it in Godot as a scene and create an instance of this scene.
4. Install and enable the from the asset library. (You may have to click build in the top right corner if you get errors, while trying to enable it; or under project > tools > C# > press Create C# Solution)
5. Add a Destruction node to the intact scene and set the Fragmented scene to the fragmented scene.
6. Set the Shard Container to the node the fragmented objects will be added to at runtime or leave it empty.
7. Call Destroy(explosionPower: int, explosionDirection : Vector3()) to destroy the object with a given explosion force and direction. (To have each shard given a random direction use Vector3.ZERO as the direction)

Options

Under the generation tab there are various options which affect both pre-generated and dynamically generated shards. Such options are listed below along with a short explanation:

• Generate shards generates the shards and saves them as a packed scene at the save path.
• Fragmented Material allows setting a custom material for the shards, if left blank shards will inherit the base objects material.
• Pregenerated shards used to set a scene of pre-made shards, if left blank shards will be generated upon calling Destroy.
• Preload shards which as the name suggests loads the shard scene at ready instead of when the Destroy function is called.
• Save path determines where the generated shards scene will be saved.
• Clean collision mesh is reccomended to be enabled as it doesn't cause much of a performance impact and removes duplicate and interior vertices which aren't needed.
• Simplify collision mesh which at the cost of time and processing power simplifies the shard meshes collision shapes which can drastically improve performance in instances with large quantites of shards.
• Shard Mass Simply setting the set the mass of each shard.
• Linear dampening Sets the linear dampening affect on each shard.
• Linear dampening mode Sets the linear dampening mode on each shard (Combine, adds the local dampening + the global, while replace just uses the local).
• Angular dampening Sets the angular dampening affect on each shard.
• Angular dampening mode Sets the angular dampening mode on each shard (Combine, adds the local dampening + the global, while replace just uses the local).

There are also options for animating the shards deletion after a set time under Animation:

• Fade delay the amount of time before the shards start fading (set to 0 to disable shrinking)
• Shrink delay the amount of time before the shards start shrinking (set to 0 to disable shrinking)
• ParticleFade when enabled causes the fade affect to appear spotted such as particles or dust. When disabled uses a clean fade.

Optimizations

In order to increase framerate and the quantity of objects that can be used at once, it's reccomened to pre-generate your shards. By doing this you:

• A: Reduce stutter caused by shard generation
• B: Additionally, you Can enable Simplify Collision Mesh which drastically increases performance, at the cost of taking longer to generate; which is negated by pre-generating shards.

Pre-generation usage

1. Configure destruction node first by following the Usage steps.
2. Go down to Generation and select a path to store your generated shard scene under "save path"
3. Click generate mesh (Checkbox that acts as a button) and wait for it to place a new shard scene at your desired location
4. There are various options you can enable or disable listed above, simplify collision mesh and clean collision mesh have to be enabled BEFORE generation, in order for use with pre-generated meshes.
5. The final step is selecting your new shard mesh scene under "Pre generated shards"

You are now done, when you next run your game / program it will be using the pregenerated meshes improving latency, and stutter, along with performance if simplify mesh is enabled.