顶点声明.htm

此文件是微软MSDN中d3d部分资料的翻译文件

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      <P class=MsoNormal><SPAN 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">副法线（<SPAN 
      class=SpellE><SPAN lang=EN-US>Binormal</SPAN></SPAN>）。没有特别的解释。<SPAN 
      lang=EN-US><o:p></o:p></SPAN></SPAN></P></TD></TR>
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      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">(D3DDECLUSAGE_TESSFACTOR, 
      0)<o:p></o:p></SPAN></P></TD>
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      <P class=MsoNormal><SPAN 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">在<SPAN 
      lang=EN-US>tessellation单元中使用的tessellation因子，用来控制tessellation比率。<o:p></o:p></SPAN></SPAN></P></TD></TR>
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      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">(D3DDECLUSAGE_POSITIONT, 
      0)<o:p></o:p></SPAN></P></TD>
    <TD 
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      <P class=MsoNormal><SPAN 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">变换后的位置。当设置了包含该语义的声明时，顶点处理会被跳过。<SPAN 
      lang=EN-US><o:p></o:p></SPAN></SPAN></P></TD></TR>
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      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">(D3DDECLUSAGE_COLOR, 
      0)<o:p></o:p></SPAN></P></TD>
    <TD 
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      <P class=MsoNormal><SPAN 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">固定功能顶点着色器和<SPAN 
      lang=EN-US>3.0版以前的像素着色器中的漫反射色。<o:p></o:p></SPAN></SPAN></P></TD></TR>
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      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">(D3DDECLUSAGE_COLOR, 
      1)<o:p></o:p></SPAN></P></TD>
    <TD 
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      <P class=MsoNormal><SPAN 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">固定功能顶点着色器和<SPAN 
      lang=EN-US>3.0版以前的像素着色器中的镜面反射色。<o:p></o:p></SPAN></SPAN></P></TD></TR>
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      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">(D3DDECLUSAGE_FOG, 
      0)<o:p></o:p></SPAN></P></TD>
    <TD 
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      <P class=MsoNormal><SPAN 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">当设置了<SPAN 
      lang=EN-US>3.0版以前的像素着色器时，在像素着色器处理之后使用的雾混合值。<o:p></o:p></SPAN></SPAN></P></TD></TR>
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      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">(D3DDECLUSAGE_DEPTH, 
      n)<o:p></o:p></SPAN></P></TD>
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      <P class=MsoNormal><SPAN 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">深度。没有特别的解释。<SPAN 
      lang=EN-US><o:p></o:p></SPAN></SPAN></P></TD></TR>
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      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">(D3DDECLUSAGE_SAMPLE, 
      n)<o:p></o:p></SPAN></P></TD>
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      <P class=MsoNormal><SPAN 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">查找得到的位移值。只能和<SPAN 
      lang=EN-US>D3DDECLMETHOD_LOOKUP或D3DDECLMETHOD_LOOKUPPRESAPLED一起使用。<o:p></o:p></SPAN></SPAN></P></TD></TR></TBODY></TABLE>
<P class=MsoNormal 
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">有一个特殊的顶点元素值被视为顶点着色器声明的结束。这个值是<SPAN 
lang=EN-US>#define D3DDECL_END() {0xFF,0,0,0,0,0}。<o:p></o:p></SPAN></SPAN></P>
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style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN 
class=SpellE><SPAN lang=EN-US 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">UsageIndex</SPAN></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">与<SPAN 
lang=EN-US>Usage连用用来指定一个顶点元素的语义。现在用户可以指定Usage为D3DDECLUSAGE_POSITION以及<SPAN 
class=SpellE>UsageIndex</SPAN> = 1，而不是像Microsoft DirectX&reg; 
8.x中那样使用D3DVSDE_POSITION2。<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal 
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">一个<SPAN 
class=SpellE><SPAN lang=EN-US>Decl</SPAN></SPAN>指定<SPAN class=SpellE><SPAN 
lang=EN-US>tessellator</SPAN></SPAN>引擎（或者万一没有使用<SPAN class=SpellE><SPAN 
lang=EN-US>tessellator</SPAN></SPAN>引擎的话，就直接是顶点处理引擎，）的输入和输出，顶点元素中的类型域指定输入到<SPAN 
class=SpellE><SPAN lang=EN-US>decl</SPAN></SPAN>的数据类型。输出类型由方法隐式决定。<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal 
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN 
style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN">顶点着色器中有如下形式的前缀<SPAN 
lang=EN-US>{semantic, semantic index, register 
number}。运行库会把声明的语义与着色器的语义信息进行匹配，这样就把输入寄存器和数据流中的字节偏移量配成一对。<o:p></o:p></SPAN></SPAN></P>
<H3><A name=把FVF映射到DirectX90的Decl></A><A name=Mapping_FVF_to_DX9_Decl></A><SPAN 
style="mso-bookmark: 把FVF映射到DirectX90的Decl"><SPAN 
style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">把</SPAN></SPAN><SPAN 
style="mso-bookmark: 把FVF映射到DirectX90的Decl"><SPAN lang=EN-US 
style="mso-fareast-language: ZH-CN">FVF</SPAN></SPAN><SPAN 
style="mso-bookmark: 把FVF映射到DirectX90的Decl"><SPAN 
style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">映射到</SPAN></SPAN><SPAN 
style="mso-bookmark: 把FVF映射到DirectX90的Decl"><SPAN lang=EN-US 
style="mso-fareast-language: ZH-CN">DirectX 9.0</SPAN></SPAN><SPAN 
style="mso-bookmark: 把FVF映射到DirectX90的Decl"><SPAN 
style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</SPAN></SPAN><SPAN 
style="mso-bookmark: 把FVF映射到DirectX90的Decl"><SPAN class=SpellE><SPAN lang=EN-US 
style="mso-fareast-language: ZH-CN">Decl</SPAN></SPAN></SPAN><SPAN 
style="mso-bookmark: 把FVF映射到DirectX90的Decl"></SPAN><SPAN lang=EN-US 
style="mso-fareast-language: ZH-CN"><o:p></o:p></SPAN></H3>
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      <P class=MsoNormal style="TEXT-ALIGN: center" align=center><B><SPAN 
      lang=EN-US style="FONT-FAMILY: 宋体">FVF</SPAN></B><B><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></B></P></TD>
    <TD 
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      <P class=MsoNormal style="TEXT-ALIGN: center" align=center><B><SPAN 
      style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN">数据类型</SPAN></B><B><SPAN 
      lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"><o:p></o:p></SPAN></B></P></TD>
    <TD 
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      <P class=MsoNormal style="TEXT-ALIGN: center" align=center><B><SPAN 
      style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN">用途</SPAN></B><B><SPAN 
      lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"><o:p></o:p></SPAN></B></P></TD>
    <TD 
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      <P class=MsoNormal style="TEXT-ALIGN: center" align=center><B><SPAN 
      style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN">用途索引</SPAN></B><B><SPAN 
      lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-fareast-language: ZH-CN"><o:p></o:p></SPAN></B></P></TD></TR>
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      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体">D3DFVF_XYZ</SPAN><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD>
    <TD 
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      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体">D3DDECLTYPE_FLOAT3</SPAN><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD>
    <TD 
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      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体">D3DDECLUSAGE_POSITION</SPAN><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD>
    <TD 
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      <P class=MsoNormal><SPAN lang=EN-US style="FONT-FAMILY: 宋体">0</SPAN><SPAN 
      lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD></TR>
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    width=180>
      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体">D3DFVF_XYZRHW</SPAN><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD>
    <TD 
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    width=190>
      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体">D3DDECLTYPE_FLOAT4</SPAN><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体"><o:p></o:p></SPAN></P></TD>
    <TD 
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    width=226>
      <P class=MsoNormal><SPAN lang=EN-US 
      style="FONT-FAMILY: 宋体">D3DDECLUSAGE_POSITIONT</SPAN><SPAN lang=EN-US