Method update

Source/Falcor/Scene/Lights/Light.cpp:313–330

    }

    void DistantLight::update()
    {
        // Update transformation matrices
        // Assumes that mData.dirW is normalized
        const float3 up(0.f, 0.f, 1.f);
        float3 vec = cross(up, -mData.dirW);
        float sinTheta = length(vec);
        if (sinTheta > 0.f)
        {
            float cosTheta = dot(up, -mData.dirW);
            mData.transMat = math::matrixFromRotation(std::acos(cosTheta), vec);
        }
        else
        {
            mData.transMat = float4x4::identity();
        }
        mData.transMatIT = inverse(transpose(mData.transMat));
    }

    void DistantLight::updateFromAnimation(const float4x4& transform)
    {