_Use_decl_annotations_
void KdTreeCompiler2::BuildVisibleIndexList(const XMMATRIX& cameraWorld, const XMMATRIX& projection, uint32_t* indices, uint32_t maxIndices, uint32_t* numIndices, uint32_t* materials, uint32_t maxMaterials, uint32_t* numMaterials)
{
*numIndices = 0;
*numMaterials = 0;
// TODO: Remove dependency on BoundingFrustum. Since all we
// need is the 4 corners, we can derive those directly from view & projection
BoundingFrustum frustum;
BoundingFrustum::CreateFromMatrix(frustum, projection);
frustum.Transform(frustum, cameraWorld);
XMFLOAT3 corners[8];
frustum.GetCorners(corners);
XMFLOAT3 min = corners[0];
XMFLOAT3 max = corners[0];
for (uint32_t i = 1; i < 8; ++i)
{
min = VecMin(min, corners[i]);
max = VecMax(max, corners[i]);
}
XMFLOAT3 position;
XMStoreFloat3(&position, cameraWorld.r[3]);
AppendVisibleIndices(&position.x, &min.x, &max.x, _root, indices, maxIndices, numIndices, materials, maxMaterials, numMaterials);
}
//--------------------------------------------------------------------------------------
void DrawFrustum( const BoundingFrustum& frustum, FXMVECTOR color )
{
XMFLOAT3 corners[ BoundingFrustum::CORNER_COUNT ];
frustum.GetCorners( corners );
VertexPositionColor verts[24];
verts[0].position = corners[0];
verts[1].position = corners[1];
verts[2].position = corners[1];
verts[3].position = corners[2];
verts[4].position = corners[2];
verts[5].position = corners[3];
verts[6].position = corners[3];
verts[7].position = corners[0];
verts[8].position = corners[0];
verts[9].position = corners[4];
verts[10].position = corners[1];
verts[11].position = corners[5];
verts[12].position = corners[2];
verts[13].position = corners[6];
verts[14].position = corners[3];
verts[15].position = corners[7];
verts[16].position = corners[4];
verts[17].position = corners[5];
verts[18].position = corners[5];
verts[19].position = corners[6];
verts[20].position = corners[6];
verts[21].position = corners[7];
verts[22].position = corners[7];
verts[23].position = corners[4];
for( size_t j = 0; j < _countof(verts); ++j )
{
XMStoreFloat4( &verts[j].color, color );
}
auto context = DXUTGetD3D11DeviceContext();
g_BatchEffect->Apply( context );
context->IASetInputLayout( g_pBatchInputLayout );
g_Batch->Begin();
g_Batch->Draw( D3D11_PRIMITIVE_TOPOLOGY_LINELIST, verts, _countof( verts ) );
g_Batch->End();
}