【DirectX12】第六章-练习

练习3.

(a)

//LINELIST

    std::array<VPosData, 8> posData = {
        VPosData({ XMFLOAT3(-2.0f, -1.0f, +1.0f) }),
        VPosData({ XMFLOAT3(-1.5f, +1.0f, +1.0f) }),
        VPosData({ XMFLOAT3(-1.0f, -0.3f, +1.0f) }),
        VPosData({ XMFLOAT3(-0.3f, +0.7f, +1.0f) }),
        VPosData({ XMFLOAT3(-0.0f, -0.3f, +1.0f) }),
        VPosData({ XMFLOAT3(+1.0f, +0.7f, +1.0f) }),
        VPosData({ XMFLOAT3(+2.0f, +0.0f, +1.0f) }),
        VPosData({ XMFLOAT3(+2.7f, +1.5f, +1.0f) }),
    };

    std::array<std::uint16_t, 36> indices =
    {
        0,1,2,
        1,2,3,
        2,3,4,
        3,4,5,
        4,5,6,
        5,6,7,
    };

 (b)

//LINELIST

    std::array<std::uint16_t, 36> indices =
    {
        0,1,2,3,4,5,6,7
    };

(c)

//LINELIST
std::array<std::uint16_t, 36> indices =
    {
        0,1,
        1,2,
        0,2,
        1,3,
        2,3,
        3,4,
        2,4,
        3,5,
        4,5,
        5,6,
        4,6,
        5,7,
        6,7
    };

练习4：

//TRIANGLESTRIP

std::array<VPosData, 5> posData = {
        VPosData({ XMFLOAT3(-1.0f, -1.0f, -1.0f) }),
        VPosData({ XMFLOAT3(+1.0f, -1.0f, -1.0f) }),
        VPosData({ XMFLOAT3(+1.0f, -1.0f, +1.0f) }),
        VPosData({ XMFLOAT3(-1.0f, -1.0f, +1.0f) }),
        VPosData({ XMFLOAT3(-0.0f, +0.78f, +0.0f) }),

    };

    std::array<VColorData, 5> colorData{
        VColorData({ XMFLOAT4(Colors::Green) }),
        VColorData({ XMFLOAT4(Colors::Green) }),
        VColorData({ XMFLOAT4(Colors::Green) }),
        VColorData({ XMFLOAT4(Colors::Green) }),
        VColorData({ XMFLOAT4(Colors::Red) })
    };

    std::array<std::uint16_t, 36> indices =
    {
        0,1,2,
        0,3,2,

        0,1,4,
        0,3,4,
        1,2,4,
        2,3,4,
    };

 在update中添加代码获得旋转效果：

    XMMATRIX Ry;

    static float Y = 0.0f;
    Ry = XMMatrixRotationY(Y);
    Y += 0.001;  
    XMStoreFloat4x4(&mWorld, Ry);

添加另一个图形（新建buffer）：

BoxApp.cpp

①修改ommandList：

std::unique_ptr<MeshGeometry> mBoxGeo02 = nullptr;

mCommandList->IASetVertexBuffers(0, 1, &mBoxGeo02->VertexBufferView());//设置顶点buffer视图，起始接口也为0，顶点buffer数量依旧为1个

mCommandList->IASetIndexBuffer(&mBoxGeo02->IndexBufferView());//设置索引buffer视图

mCommandList->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);//不变 

mCommandList->SetGraphicsRootDescriptorTable(0, mCbvHeap->GetGPUDescriptorHandleForHeapStart());
mCommandList->DrawIndexedInstanced( mBoxGeo02->DrawArgs["cww"].IndexCount, 1, 0, 0, 0);//改变drawargs里的字符串，因为是另一个物体，用不同名字以区分