How to mirror a 3D mesh on the X axis - c++

Question

I am working on a C++ 3D game and I am having trouble with how the mesh looks when I am loading it from a glTF file on the screen.
This is the 3D model I am trying to load.
I am using DirectX 11.
As you can see the mesh is flipped on the X-axis and I can't figure what to do to flip to look normal.
This is how I want it to look.
struct VS_INPUT
{
float4 position: POSITION0;
float2 texcoord: TEXCOORD0;
float3 normal: NORMAL0;
};
struct VS_OUTPUT
{
float4 position: SV_POSITION;
float2 texcoord: TEXCOORD0;
float3 normal: NORMAL0;
float3 direction_to_camera: TEXCOORD1;
};
cbuffer constant: register(b0)
{
row_major float4x4 m_world;
row_major float4x4 m_view;
row_major float4x4 m_proj;
float4 m_light_direction;
float4 m_camera_position;
float4 m_light_position;
float m_light_radius;
};
VS_OUTPUT vsmain(VS_INPUT input)
{
VS_OUTPUT output = (VS_OUTPUT)0;
// WORLD SPACE
output.position = mul(input.position, m_world);
output.direction_to_camera = normalize(output.position - m_camera_position.xyz);
// VIEW SPACE
output.position = mul(output.position, m_view);
// SCREEN SPACE
output.position = mul(output.position, m_proj);
output.texcoord = input.texcoord;
output.normal = normalize(mul(input.normal, m_world));
return output;
}
This is the vertex shader I am using.

Answer 1

output.position.x = -output.position.x; in vertex shader
or when loading your mesh and parsing vertices invert x coordinate of vertex.
v.x = -v.x;
or scaling -1 on x axis should do the trick.
SetScale( -1.0f, 1.0f, 1.0f );