Directx11 tutorial (46) Alpha blend (3)

Now we try to change the box texture and use a DDS file with Alpha wirefence. Dds,

Use DirectX texture tool to open the file interface as follows:

In fact, in this figure, some pixels have alpha values and some pixels have alpha values of 0. We can click View-alpha channel only to see the following figure. The Alpha value of the black part is 0:

Now we paste this figure to the box. The program running effect is as follows:

We add the following code in lighttex. PS. Pay attention to the use of clip functions.

Float3 n = normalize (input. worldnormal );
Float4 texturecolor = shadertexture. Sample (sampletype, input. Tex );

// Obtain the Alpha value from the texture map
Float alpha = shadertexture. Sample (sampletype, input. Tex).;
// If Alpha is less than 0.25, discard the current Pixel
Clip (alpha-0.25 );

After the program is executed, the effect is as follows:

The program running result is good, but the back of the fence box is removed. Next we try to add a function to the d3dclass to disable and enable the cullmode function. When the box is rendered, remove the back.

Void d3dclass: enablebackcullmode (bool B)
{
D3d11_rasterizer_desc rasterdesc;
Hresult result;

// Sets the grating description to specify how the polygon is rendered.
Rasterdesc. antialiasedlineenable = false;
If (B)
Rasterdesc. cullmode = d3d11_cull_back;
Else
Rasterdesc. cullmode = d3d11_cull_none;
Rasterdesc. depthbias = 0;
Rasterdesc. depthbiasclamp = 0.0f;
Rasterdesc. depthclipenable = true;
Rasterdesc. fillmode = d3d11_fill_solid; // d3d11_fill_solid
Rasterdesc. frontcounterclockwise = false;
Rasterdesc. multisampleenable = false;
Rasterdesc. scissorenable = false;
Rasterdesc. slopescaleddepthbias = 0.0f;

// Create a raster status
Result = m_device-> createrasterizerstate (& rasterdesc, & m_rasterstate );
If (failed (result ))
{
HR (result );
Return;
}

// Set the grating status to take effect
M_devicecontext-> rssetstate (m_rasterstate );
}
When rendering a box in graphicsclass, we add the following code:

// Turn off the back when rendering the box.
M_d3d-> enablebackcullmode (false );
// Use light shader for rendering
Result = m_lighttexshader-> render (m_d3d-> getdevicecontext (), m_cubemodel-> getindexcount (), worldmatrix3, viewmatrix, projectionmatrix,
Light, material, camera, m_texmanager-> createtex (m_d3d-> getdevice (), string ("wirefence. Dds ")));
M_d3d-> enablebackcullmode (true );

// Open the back to remove
M_d3d-> enablebackcullmode (true );

The final running effect of the program is as follows:

Complete code can be found:

Project File mytutoriald3d11_41

Download Code:

Http://files.cnblogs.com/mikewolf2002/d3d1139-49.zip

Http://files.cnblogs.com/mikewolf2002/pictures.zip