Subtraction trait not working for torus

[edap]

If subtract a box from a sphere:

sdfu::Sphere::new(0.45).subtract(sdfu::Box::new(Vec3A::new(0.25, 0.25, 1.5)));

It works. But if I subtract a torus from a sphere:

sdfu::Sphere::new(0.45)..subtract(sdfu::Torus::new(0.45, 0.1))

I get this error message:

error[E0282]: type annotations needed
    |
539 |             .subtract(sdfu::Torus::new(0.45, 0.1))
    |              ^^^^^^^^
    |
help: try using a fully qualified path to specify the expected types
    |
538 |         <sdfu::Sphere<f32> as SDF<f32, V>>::subtract::<Torus<f32>>(sdfu::Sphere::new(0.45), sdfu::Torus::new(0.45, 0.1))
    |         +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++                       ~

[fu5ha]

This is because it can't infer the type of float, you should be able to just put 0.45f32 (or you may have to specify the vector type as well at some point, but it can hopefully figure that out itself). As long as you specify somewhere it should be able to infer the rest

[edap]

I see, I have tried to specify the type

let sphere_radius :f32 = 0.35;
let torus_radius: f32 = sphere_radius - 0.1;
let torus_t: f32 = 0.1;
let sdf_sphere = TracedSDF::new( sdfu::Sphere::new(sphere_radius)
                              .subtract(sdfu::Torus::new(torus_radius, torus_t));

But the error persists.