void OvRenderer::RenderUnitRect( OvVertexShaderSPtr v_shader , OvPixelShaderSPtr p_shader )
{
struct SScreenRect
{
OvPoint3 pos; OvPoint2 tex;
};
static D3DVERTEXELEMENT9 rect_elem[] =
{
{ 0, 0
, D3DDECLTYPE_FLOAT3
, D3DDECLMETHOD_DEFAULT
, D3DDECLUSAGE_POSITION, 0 },
{ 0, 12
, D3DDECLTYPE_FLOAT2
, D3DDECLMETHOD_DEFAULT
, D3DDECLUSAGE_TEXCOORD, 0 },
D3DDECL_END()
};
static SScreenRect rect[] =
{ {OvPoint3(-1,-1,0),OvPoint2(0,1)}
, {OvPoint3(-1,+1,0),OvPoint2(0,0)}
, {OvPoint3(+1,+1,0),OvPoint2(1,0)}
, {OvPoint3(+1,-1,0),OvPoint2(1,1)}};
static LPDIRECT3DVERTEXBUFFER9 rectVertBuffer = CreateVertexStream( (void*)&rect[0], sizeof( SScreenRect ), 4 );
static LPDIRECT3DVERTEXDECLARATION9 rectDecl = CreateVertexDeclaration( rect_elem );
if ( v_shader ) SetVertexShader( v_shader );
if ( p_shader ) SetPixelShader( p_shader );
SetVertexStream( 0, SVertexStreamInfo( rectVertBuffer, sizeof( SScreenRect ), 0) );
SetVertexDeclaration( rectDecl );
DrawPrimitive( D3DPT_TRIANGLEFAN, 2);
}
HRESULT SceneObjectGrid::InitializeMeshStreams(__in ISceneObjectMesh* pMesh, const XMVECTOR xAxis, const XMVECTOR yAxis, const XMFLOAT3& origin, UINT xResolution,
UINT yResolution, XMFLOAT4 color)
{
if (xResolution == 0 || yResolution == 0 || pMesh == NULL)
{
return E_INVALIDARG;
}
HRESULT hr = S_OK;
xResolution = max(1, xResolution);
yResolution = max(1, yResolution);
// Build grid geometry
INT iLineCount = xResolution + yResolution + 2;
VertexType* pLines = new VertexType[2 * iLineCount];
if (!pLines)
{
hr = E_OUTOFMEMORY;
}
else
{
XMVECTOR vOrigin = XMLoadFloat3(&origin);
for (UINT i = 0; i <= xResolution; i++)
{
FLOAT fPercent = (FLOAT)i / (FLOAT)xResolution;
fPercent = (fPercent * 2.0f) - 1.0f;
XMVECTOR vScale = XMVectorScale(xAxis, fPercent);
vScale = XMVectorAdd( vScale, vOrigin );
XMStoreFloat3(&pLines[(i * 2)].position, XMVectorSubtract(vScale, yAxis));
pLines[(i * 2)].color = color;
XMStoreFloat3(&pLines[(i * 2) + 1].position, XMVectorAdd(vScale, yAxis));
pLines[(i * 2) + 1].color = color;
}
UINT iStartIndex = (xResolution + 1) * 2;
for (UINT i = 0; i <= yResolution; i++)
{
FLOAT fPercent = (FLOAT)i / (FLOAT)yResolution;
fPercent = (fPercent * 2.0f) - 1.0f;
XMVECTOR vScale = XMVectorScale(yAxis, fPercent);
vScale = XMVectorAdd(vScale, vOrigin);
XMStoreFloat3(&pLines[(i * 2) + iStartIndex].position, XMVectorSubtract(vScale, xAxis));
pLines[(i * 2) + iStartIndex].color = color;
XMStoreFloat3(&pLines[(i * 2) + 1 + iStartIndex].position, XMVectorAdd(vScale, xAxis));
pLines[(i * 2) + 1 + iStartIndex].color = color;
}
SmartPtr<IVertexStream> spVertexStream;
hr = CreateVertexStream(2 * iLineCount, pLines, &spVertexStream);
if (SUCCEEDED(hr))
{
hr = pMesh->SetMeshStream(MeshStreamType::MST_VERTEX_POSITIONS, spVertexStream.CastTo<IMeshStream>());
}
pMesh->SetPrimitiveTopologyType(PrimitiveTopologyType::PTT_LINELIST);
}
delete[] pLines;
return hr;
}
