struct vertexIn
{
    float4 position : POSITION;
    float4 normal : NORMAL;
    float2 uv : TEXCOORD0;
};

struct vertexOut
{
    float4 position : POSITION; //<! transformed position
    float2 uv : TEXCOORD0; //<! passing on uv information
    float3 worldNormal : TEXCOORD1; //<! surface normal transformed into world
    float3 worldView : TEXCOORD2; //<! view direction transformed into world
};

vertexOut main(vertexIn input, uniform float4x4 iWorldTMatrix, uniform float4x4 iViewMatrix, uniform float4x4 worldMatrix, uniform float4x4 viewProjMatrix, uniform float inflate )
{
   vertexOut output;
   float4 myPosition = input.position;
   output.worldNormal=mul(iWorldTMatrix, input.normal).xyz; //transforming the normal
   input.normal = normalize(float4(input.normal.xyz,0)); //normalizing the normal according to the three relevant parts
   myPosition.xyz += inflate * input.normal; //inflating the model into a bigger shape
   myPosition = mul(worldMatrix, myPosition); //transforming position into world
   output.worldView = normalize(float3(iViewMatrix[0].w, iViewMatrix[1].w, iViewMatrix[2].w) - myPosition.xyz);//view direction according to world
   output.position = mul(viewProjMatrix, myPosition); //finish transformation of the position into the projection space
   output.uv = input.uv; //passing on uv information
   return output;
}