Add Convert to Empty operator for lightweight collision primitives

[by-tndy]

Request

Add an operator that converts collider objects to Blender Empty objects using primitive display types (cube, sphere, etc.). Most game engines support empty-based collision primitives, which are simpler and cheaper to compute than mesh-based colliders.

Implementation

Added convert_to_empty.py in collider_conversion/ with a new operator that:

• Converts selected collider mesh objects to Blender Empty objects.
• Sets the empty display type to match the original collider shape (e.g. cube, sphere).
• Preserves the collider's transform (location, rotation, scale).
• Applies correct naming based on the active preset's naming convention.
• Reports consistent output info in the info bar on completion.
• Exposed in the properties panel alongside other conversion operators.

[Weisl]

Thanks for reaching out! To better understand your needs, could you please provide a bit more detail about how you envision this working? If you have any engine examples, reference materials, or example videos, those would be very helpful.
I also have a few specific questions to ensure we’re on the same page:

• How do you define the collision type tho be imported into the engine correctly?
• How would you like to specify dimensions, such as the diameter of a cube or sphere?

Looking forward to your feedback to get a better understanding of the feature request.

[by-tndy]

I can send you an example project for a demonstration.

test.zip

mk9_afv_3dblock_export.zip

[Weisl]

Could you please specify for which engine this is intended to be?

[by-tndy]

Could you please specify for which engine this is intended to be?

Renderware. To be more specific, gta sa and multiplayer

[by-tndy]

Could you please specify for which engine this is intended to be?

I will adapt it to the engine myself, so you don't have to worry about it. I just wanted to have the ability to automatically create such a collision to optimize the process

[Weisl]

Thank you for your feature request.

This is a big feature request. It is not something I plan to do in the near future as it requires a lot of design, development and testing work.
I will keep it in my backlog.

As a note, I prioritize requests from paying customers—if you purchased Simple Collider through Superhive, please send me a short message there.

Thanks for your understanding!

[by-tndy]

Thank you for your feature request.

This is a big feature request. It is not something I plan to do in the near future as it requires a lot of design, development and testing work. I will keep it in my backlog.

As a note, I prioritize requests from paying customers—if you purchased Simple Collider through Superhive, please send me a short message there.

Thanks for your understanding!

Hello again. I have some ideas how to implement this method based on dummies in a blender, how about using the principle of K-Demension Tree and Octree?

[Weisl]

@by-tndy

• I implemented the posibility to convert box and sphere collider meshes into empty objects
• And k-Dop convex mesh colliders
  This will be in the next release. It's currently on the develop branch

[by-tndy]

• I implemented the posibility to convert box and sphere collider meshes into empty objects
• And k-Dop convex mesh colliders
  This will be in the next release. It's currently on the develop branch

thx bro, I'll test it as soon as I get to my computer.

[by-tndy]

@by-tndy

• I implemented the posibility to convert box and sphere collider meshes into empty objects

Unfortunately, it doesn't work, or I'm not using it correctly. No matter what object I select (whether it's a simple cube or a mesh), it says "No supported colliders (box/sphere) selected for conversion"

[Weisl]

The workflow is currently:

1. Create a sphere or Box collider with Add Box or Add Sphere.
2. Select the Collider you want to convert.
3. Press Mesh Collider->Empty

Creating the colliders with the regular Add Box and Add Sphere creates all the meta data that is used by the Mesh Collider->Empty

[by-tndy]

The workflow is currently:

1. Create a sphere or Box collider with Add Box or Add Sphere.
2. Select the Collider you want to convert.
3. Press Mesh Collider->Empty

Creating the colliders with the regular Add Box and Add Sphere creates all the meta data that is used by the Mesh Collider->Empty

Yes, it's working now.
Is it possible to create multiple box/sphere objects based on a complex mesh? In other words, is it possible to create a box/sphere shape that simplifies the mesh?