pub unsafe extern "C" fn phys_PxSdfSample(
    sdf: *const f32,
    localPos: *const PxVec3,
    sdfBoxLower: *const PxVec3,
    sdfBoxHigher: *const PxVec3,
    sdfDx: f32,
    invSdfDx: f32,
    dimX: u32,
    dimY: u32,
    dimZ: u32,
    gradient: *mut PxVec3,
    tolerance: f32
) -> f32