Notes on BasicEffect

basicEffectNotes.cs

// This is how the WorlViewProj matrix is computed:
Matrix worldViewProj;             
Matrix.Multiply(ref world, ref view, out worldView);
Matrix.Multiply(ref worldView, ref projection, out worldViewProj);

// This is how it is used in the HLSL file:
struct CommonVSOutput
{
    float4 Pos_ps;
    float4 Diffuse;
    float3 Specular;
    float  FogFactor;
};


CommonVSOutput ComputeCommonVSOutput(float4 position)
{
    CommonVSOutput vout;
    
    vout.Pos_ps = mul(position, WorldViewProj);
    vout.Diffuse = DiffuseColor;
    vout.Specular = 0;
    vout.FogFactor = ComputeFogFactor(position);
    
    return vout;
}

// This is how I was drawing models before I ripped out BasicEffect:
effect.World = transforms[mesh.ParentBone.Index];
effect.World *= Matrix.CreateRotationY(Model.Rotation);
effect.World *= Matrix.CreateTranslation(Model.Position);