Instanced Mesh for 2d objects

[ErikKoinberg]

Thr transformations for instances uses a vector of 4x4 matrices, so I am assuming it is for 3d objects. Can I use instanced mesh for 2d geometry in a 2d camera, such as circles, and if so, how?

[Nevsden]

Yes, you can use this for 2d objects.
You need to use an orthographic camera and use a projection matrix like this:

Example

    Camera::new_orthographic(
        window.viewport(),
        vec3(0.0, 0.0, 1.0),
        vec3(0.0, 0.0, 0.0),
        vec3(0.0, 1.0, 0.0),
        2.5,
        -0.001,
        10000.0,
    )
    ```

[asny]

In general, if 3D is supported, 2D is also supported, simply just always set the z-value of your geometry to 0 and view the geometry from the z direction. For the 4x4 transformation, set the 3rd row and 3rd column to [0, 0, 1, 0] if you don't need the third dimension.