Method CreateScene

GTE/Samples/Graphics/Texturing/TexturingWindow3.cpp:74–126

}

void TexturingWindow3::CreateScene()
{
    // Create a vertex buffer for a two-triangles square.  The PNG is stored
    // in left-handed coordinates.  The texture coordinates are chosen to
    // reflect the texture in the y-direction.
    struct Vertex
    {
        Vector3<float> position;
        Vector2<float> tcoord;
    };

    VertexFormat vformat;
    vformat.Bind(VASemantic::POSITION, DF_R32G32B32_FLOAT, 0);
    vformat.Bind(VASemantic::TEXCOORD, DF_R32G32_FLOAT, 0);

    auto vbuffer = std::make_shared<VertexBuffer>(vformat, 4);
    auto* vertices = vbuffer->Get<Vertex>();
    vertices[0].position = { 0.0f, 0.0f, 0.0f };
    vertices[0].tcoord = { 0.0f, 1.0f };
    vertices[1].position = { 1.0f, 0.0f, 0.0f };
    vertices[1].tcoord = { 1.0f, 1.0f };
    vertices[2].position = { 0.0f, 1.0f, 0.0f };
    vertices[2].tcoord = { 0.0f, 0.0f };
    vertices[3].position = { 1.0f, 1.0f, 0.0f };
    vertices[3].tcoord = { 1.0f, 0.0f };

    // Create an indexless buffer for a triangle mesh with two triangles.
    auto ibuffer = std::make_shared<IndexBuffer>(IP_TRISTRIP, 2);

    // Create an effect for the vertex and pixel shaders.  The texture is
    // bilinearly filtered and the texture coordinates are clamped to [0,1]^2.
    auto myTexture = WICFileIO::Load(mEnvironment.GetPath("StoneWall.png"), false);
    auto effect = std::make_shared<Texture2Effect>(mProgramFactory, myTexture,
        SamplerState::Filter::MIN_L_MAG_L_MIP_P, SamplerState::Mode::CLAMP, SamplerState::Mode::CLAMP);

    // Create the geometric object for drawing.  Translate it so that its
    // center of mass is at the origin.  This supports virtual trackball
    // motion about the object "center".
    mSquare = std::make_shared<Visual>(vbuffer, ibuffer, effect);
    mSquare->localTransform.SetTranslation(-0.5f, -0.5f, 0.0f);

    // Enable automatic updates of pvw-matrices and w-matrices.
    mPVWMatrices.Subscribe(mSquare->worldTransform, effect->GetPVWMatrixConstant());

#if defined(SAVE_RENDERING_TO_DISK)
    mTarget = std::make_shared<DrawTarget>(1, DF_R8G8B8A8_UNORM, mXSize,
        mYSize);
    mTarget->GetRTTexture(0)->SetCopy(Resource::Copy::STAGING_TO_CPU);
#endif

    mTrackBall.Attach(mSquare);
    mTrackBall.Update();
}