3D Game Programming with directx 11 习题答案 8.3

第八章 第三题

1、将flare.dds和flarealpha.dds拷贝到工程目录

2、创建shader resource view

HR(D3DX11CreateShaderResourceViewFromFile(md3dDevice,
    L"Textures/flare.dds", 0, 0, &mFlareSRV, 0));
 
HR(D3DX11CreateShaderResourceViewFromFile(md3dDevice,
    L"Textures/flarealpha.dds", 0, 0, &mFlareAlphaSRV, 0));

3、在Basic.fx中添加纹理

Texture2D gFlare;
Texture2D gFlareAlpha;

4、设置纹理

Flare              = mFX->GetVariableByName("gFlare")->AsShaderResource();
FlareAlpha          = mFX->GetVariableByName("gFlareAlpha")->AsShaderResource();

5、在Basic.fx中将两个texel的值相乘（component-wise multiply）

float4 flareTex = gFlare.Sample(samAnisotropic, pin.Tex);
float4 flareAlphaTex = gFlareAlpha.Sample(samAnisotropic, pin.Tex);
texColor = flareTex * flareAlphaTex;

6、搞定