directx初第十三卷

最新推荐文章于 2020-06-06 10:44:18 发布

原创最新推荐文章于 2020-06-06 10:44:18 发布 · 432 阅读

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Shadow

声明变量

ID3DXMesh* mesh;
ID3DXMesh* wall;

开启深度缓存

不再赘述

绘制场景

D3DXMATRIX T;
D3DXMatrixTranslation(&T, 1, 1, 0);
g_pd3dDevice->SetTransform(D3DTS_WORLD, &T);
g_pd3dDevice->SetMaterial(&red_mtrl);
mesh->DrawSubset(0);

D3DXMatrixTranslation(&T, 0, -0.5f, 0);
g_pd3dDevice->SetTransform(D3DTS_WORLD, &T);
g_pd3dDevice->SetMaterial(&white_mtrl);
wall->DrawSubset(0);

绘制阴影

//光的位置
D3DXVECTOR4 lightDirection(1, -1, 0, 0.0f);
D3DXPLANE groundPlane(0.0f, -1.0f, 0.0f, 0.0f);
D3DXMATRIX S;
//计算阴影位置
D3DXMatrixShadow(&S, &lightDirection, &groundPlane);
//物体平移位置
D3DXMatrixTranslation(&T, 1, 1, 0);
D3DXMATRIX W = T * S;
g_pd3dDevice->SetTransform(D3DTS_WORLD, &W);

D3DMATERIAL9 mtrl = InitMatrix(Black, Black, Black, Black, 0.0f);
mtrl.Diffuse.a = 0.5f; 
g_pd3dDevice->SetMaterial(&mtrl);
mesh->DrawSubset(0);