ID3DXConstantTable的SetDefualts的疑??

akira32

HLSL著色器的???(3D??虺淌皆O?入? 第16章)
ID3DXConstantTable的SetDefualts的疑??

?????:
SetDefault直接常?翟O?樗??的??值.??值是?些常?敌?娴某跏贾??方法再??贸淌皆O定?r??艚幸淮

所?的"常?敌?娴某跏贾?quot;是指在"ShaderFile的初始值"或是"程式的初始值"?

Sets the constants to their default values. The default values are declared in the variable declarations in the shader.

HRESULT SetDefaults(
  LPDIRECT3DDEVICE9 pDevice
);

Source Code:
TransformViewProjHandle = TransformConstantTable->GetConstantByName(0, "ViewProjMatrix");
TransformConstantTable->SetDefaults(Device);

Shader FIle Content:
matrix ViewProjMatrix;
vector Blue = {0.0f, 0.0f, 1.0f, 1.0f};
struct VS_INPUT
{
    vector position  : POSITION;
};
struct VS_OUTPUT
{
    vector position : POSITION;
    vector diffuse  : COLOR;
};

VS_OUTPUT Main(VS_INPUT input)
{
    // zero out members of output
    VS_OUTPUT output = (VS_OUTPUT)0;

    // transform to view space and project
    output.position  = mul(input.position, ViewProjMatrix);

    // set vertex diffuse color to blue
    output.diffuse = Blue;

    return output;
}

walkingalone

按我理解应该是脚本中的缺省值