Function largestAxis

Source/Falcor/Scene/SceneBuilder.cpp:58–63

        const float kMaxTexelError = 0.5f;

        int largestAxis(const float3& v)
        {
            if (v.x >= v.y && v.x >= v.z) return 0;
            else if (v.y >= v.z) return 1;
            else return 2;
        }

        class MikkTSpaceWrapper
        {