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C-/C++-Quelltext

Vertexbuffer vBuffer;
       
void Init()
{
     SVertex Vertices[3];
     // Positionen in Pixel
     Vertices[0].Pos = Vector3(320.0f, 50.0f, 1.0f);
     Vertices[1].Pos = Vector3(520.0f, 400.0f, 1.0f);
     Vertices[2].Pos = Vector3(120.0f, 400.0f, 1.0f);
     // Farbe der Vertices
     Vertices[0].Color = Color::RED;
     Vertices[1].Color = Color::BLUE;
     Vertices[2].Color = Color::GREEN;

    // Vertexbuffer erstellen

     Math::Matrix4x4 Projection;
     // Orthogonale Projections Matrix erstellen Width: 800, Height: 600, NearPlane: -1, FarPlane: 1
     Projection = Math::OrthogonalProjection(800.0f, 600.0f, -1.0f, 1.0f);
     // Matrix setzen
}

void Draw()
{
     Device->Clear(Color::BLACK);
     // Shader, InputLayout und der Vertexbuffer werden in der Draw Methode gesetzt
     Device->Draw(3, 0, &vBuffer);
     Device->Present();
}

HLSL-Quelltext

cbuffer Matrixbuffer : register( b0 )
{
    matrix World;
    matrix View;
    matrix Projection;
    matrix WVP;
    matrix TexturMatrix;
};

struct VShaderInput
{
    float4 Pos : POSITION;
    float4 Color : COLOR;
};

struct PShaderInput
{
    float4 Pos : SV_POSITION;
    float4 Color : COLOR0;
};

PShaderInput VShader(VShaderInput Input)
{
    PShaderInput Output;
    // WVP = World * View * Projection ... Wurde im Hauptprogramm schon zusammen multiplieziert
    Output.Pos = mul(float4(Input.Pos, 1.0f), WVP); 
    Output.Color = Input.Color;

    return Output;
}

float4 PShader(PShaderInput Input) : SV_TARGET
{
    return Input.Color;
}

C-/C++-Quelltext

Matrix4x4 OrthogonalProjection(float Width, float Height, float NearPlane, float FarPlane)
{
        return Matrix4x4(2 / Width, 0.0f, 0.0f, 0.0f,
                       0.0f, 2 / Height, 0.0f, 0.0f,
           0.0f, 0.0f, 1.0f / (FarPlane - NearPlane), 0.0f,
           0.0f, 0.0f, 0.0f, -NearPlane/ (FarPlane - NearPlane));
}