我在使用 DirectX9 绘制东西时遇到了一些问题。
这是我的渲染功能:
void Render(GameWorld& world)
{
DWORD BackgroundColour = 0x00102010;
g_pd3dDevice -> Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, BackgroundColour, 1.0f, 0);
// Begin rendering the scene.
if (SUCCEEDED(g_pd3dDevice -> BeginScene()))
{
world.draw();
g_pd3dDevice -> EndScene();
}
// Present the backbuffer to the display.
g_pd3dDevice -> Present(NULL, NULL, NULL, NULL);
}
我正在使用以下代码设置 DirectX:
// Create the D3D object, return failure if this can't be done.
if (NULL == (g_pD3D = Direct3DCreate9(D3D_SDK_VERSION))) return E_FAIL;
// Set up the structure used to create the D3DDevice
D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory(&d3dpp, sizeof(d3dpp));
d3dpp.Windowed = TRUE;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
d3dpp.EnableAutoDepthStencil = TRUE;
d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
// Create the D3DDevice
if (FAILED(g_pD3D -> CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,
D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&d3dpp, &g_pd3dDevice)))
{
return E_FAIL;
}
// Turn on the Z buffer
g_pd3dDevice -> SetRenderState(D3DRS_ZENABLE, D3DZB_TRUE);
g_pd3dDevice -> SetRenderState(D3DRS_ZFUNC, D3DCMP_LESS);
g_pd3dDevice -> SetRenderState(D3DRS_ZWRITEENABLE, TRUE);
// Start with lighting off - we can add lights later.
g_pd3dDevice -> SetRenderState(D3DRS_LIGHTING, FALSE);
// Set transparencies
g_pd3dDevice -> SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
g_pd3dDevice -> SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
g_pd3dDevice -> SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);
g_pd3dDevice -> SetRenderState(D3DRS_BLENDOP, D3DBLENDOP_ADD);
// Set culling
g_pd3dDevice -> SetRenderState(D3DRS_CULLMODE,D3DCULL_CCW);
return S_OK;
实际上,这会绘制一个没有任何内容的 BackgroundColour 屏幕。
通过关闭 Z 缓冲区 [即 g_pd3dDevice -> SetRenderState(D3DRS_ZENABLE, D3DZB_FALSE);] 一切都按照调用它们的“绘制”函数的顺序绘制。稍后绘制的对象掩盖了之前绘制的对象。
我也尝试过进行这些更改:
g_pd3dDevice -> SetRenderState(D3DRS_ZFUNC, D3DCMP_GREATER);
和
g_pd3dDevice -> Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, BackgroundColour, 0.0f, 0);
现在的效果是,首先绘制的对象会遮盖后来绘制的对象,而不管它们的空间位置如何。
我想要的效果是让近处的物体遮挡远处的物体。
任何人都可以对此有所了解。
谢谢你。