如何在DirectX 9中设置左上角坐标?

时间:2012-12-27 07:09:02

标签: c++ windows directx directx-9

我需要在DirectX 9中绘制一些东西。 我有兴趣以坐标调整为像素的方式工作,而(0,0)将是 TopLeft 角落。这是我的工作:

RECT clientRect;
::GetClientRect(m_hWIN, &clientRect);

D3DXMATRIX matOrtho2D, matIdentity;    

D3DXMatrixOrthoOffCenterLH(&matOrtho2D, 0, clientRect.right, 0, clientRect.bottom, 0.0f, 1.0f);
D3DXMatrixIdentity(&matIdentity);

g_pDirect3D_Device->SetTransform(D3DTS_PROJECTION, &matOrtho2D);
g_pDirect3D_Device->SetTransform(D3DTS_WORLD, &matIdentity);
g_pDirect3D_Device->SetTransform(D3DTS_VIEW, &matIdentity);

这很好,除了(0,0)是 BottomLeft 一角。我该怎么改变它? 谢谢!

1 个答案:

答案 0 :(得分:0)

这应该添加到代码中:

D3DXMATRIX matTranslate, matFlip;  

D3DXMatrixTranslation(&matTranslate, 0, clientRect.bottom, 0.0f);
D3DXMatrixRotationX(&matFlip, D3DXToRadian(180));
D3DXMATRIX matCoordTransform = matFlip * matTranslate;

g_pDirect3D_Device->SetTransform(D3DTS_WORLD, &matCoordTransform);