Create entity for every instance of custom geometry?

[nmfisher]

I'm implementing a transform gizmo (so you can click/drag the X/Y/Z axes and apply that as a relative global transform some other object).

Say I've created a renderable with three instances, attached to a single Entity as follows:

...
auto localTransforms = new math::mat4f[3] {
            math::mat4f(),
            math::mat4f::translation(math::float3 { 0.0f, 0.05f, -0.05f}) * math::mat4f::rotation(3 * math::F_PI_2, math::float3 { 1, 0, 0 }) ,
            math::mat4f::translation(math::float3 { 0.0f, 0.05f, -0.05f}) * math::mat4f::rotation(math::F_PI_2, math::float3 { 0, 0, 1 })
        };
 ...
 RenderableManager::Builder(1)
            .boundingBox({{}, {1.0f, 1.0f, 1.0f}})
            .instances(3, instanceBuffer)
            .material(0, _gizmoMaterial->getDefaultInstance())
            .geometry(0, RenderableManager::PrimitiveType::TRIANGLES, vb,
                    ib, 0, indexCount)
            .culling(false)
            .build(*_engine, _gizmo);   

Calling pick successfully returns the _gizmo Entity (as you'd expect).

However, I'd like pick to return a different Entity for each instance (so I can determine which axis was clicked).

Is this possible, or do I just need to create one Renderable/Entity for each axis?