AnyOSL/anyosl_integration_example.artic at master · JoschuaL/AnyOSL · GitHub

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enum String{
    linear
}

struct Closure{
    eval: fn(Vector, Vector) -> (Vector, f32),
    sample: fn(Vector, Vector) -> (Vector, f32, Vector),
    pdf: fn(Vector, Vector) -> f32
}

struct ClosureOps{
    mul_Vector: fn(Closure, Color) -> Closure
}

fn @ops_Closure(){
    ClosureOps{
        mul_Vector = |clos, col|{
            Closure{
                eval = |indir, outdir|{
                    let (bsdf, pdf) = @clos.eval(indir, outdir);
                    (ops_Vector().mul(bsdf, col), pdf)
                },
                sample = clos.sample,
                pdf = clos.pdf
            }
        }
    }
}

fn @black(inv: Vector, outv: Vector) -> (Vector, f32){
    (make_vector(0,0,0), 0)
}

fn @zero(u: Vector, v: Vector) -> f32{
    0
}

fn @no_sample(inv: Vector, outv: Vector) -> (Vector, f32, Vector){
    (zerovec(), 0, zerovec())
}

fn @reflection(N: Normal, eta: f32, inout: shader_inout) -> Closure{
    Closure{
        eval = black,
        sample = |input, rnd|{(reflect(input, N, inout), 1.0, make_vector(1,1,1))},
        pdf = zero
    }
}

fn @empty_closure(){
    Closure{
        eval = black,
        sample = no_sample,
        pdf = zero
    }
}