纹理 (textures).htm

此文件是微软MSDN中d3d部分资料的翻译文件

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  href="http://www.gesoftfactory.com/developer/Textures.htm#纹理混合">纹理混合</A></SPAN></U><SPAN 
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  href="http://www.gesoftfactory.com/developer/Textures.htm#表面">表面</A></SPAN></U><SPAN 
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style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-bidi-font-family: 宋体">以下主题将更详细地介绍另外的纹理功能。<SPAN 
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  href="http://www.gesoftfactory.com/developer/Textures.htm#Mipmap的自动生成">Mipmap的自动生成</A></SPAN></U><SPAN 
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  href="http://www.gesoftfactory.com/developer/Textures.htm#自动纹理管理">自动纹理管理</A></SPAN></U><SPAN 
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  href="http://www.gesoftfactory.com/developer/Textures.htm#压缩纹理资源">压缩纹理资源</A></SPAN></U><SPAN 
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  href="http://www.gesoftfactory.com/developer/Textures.htm#使用纹理时需要考虑的硬件问题">使用纹理时需要考虑的硬件问题</A></SPAN></U><SPAN 
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style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-bidi-font-family: 宋体">要提高性能，可以考虑使用动态纹理。动态纹理在每一帧都可以被锁定，写入及解锁。更多信息请参阅<U>使用动态纹理</U>。<SPAN 
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name=纹理的基本概念><B><SPAN 
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style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-bidi-font-family: 宋体">早期计算机生成的三维图像看起来往往像是发亮的塑料，虽然这在当时也是比较先进的，但是它们缺乏各种纹路——如磨损、裂痕、指纹和污渍等，而这些纹路会增加三维物体的真实感。近年来，纹理已经在开发人员中得到普及并作为增强计算机生成的三维图像的真实感的工具。<SPAN 
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style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-bidi-font-family: 宋体">词语“纹理”在日常使用中表示物体的光滑度或粗糙度，但是在计算机图形学中，纹理指的是一张表示物体表面细节的位图。<SPAN 
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style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-bidi-font-family: 宋体">因为<SPAN 
lang=EN-US>Direct3D中所有纹理都是位图，所以可以把任何位图贴到Direct3D图元的表面。例如，应用程序可以创建物体并使它们的表面看起来有木纹的样式。可以把草、泥土和岩石等纹理贴在构成山的图元的表面，这样就能得到看起来很真实的山坡。应用程序也可以用纹理创建其它的效果，如：路边的路标，悬崖边的岩层，或是地面上的大理石。<o:p></o:p></SPAN></SPAN></P>
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style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-bidi-font-family: 宋体">另外，<SPAN 
lang=EN-US>Direct3D支持更高级的纹理技术，如纹理混合（包含或不含透明度）和光照贴图。更多信息请参阅<U>纹理混合</U>和<U>用纹理实现光照贴图</U>。<o:p></o:p></SPAN></SPAN></P>
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style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-bidi-font-family: 宋体">如果应用程序创建一个<SPAN 
lang=EN-US>HAL设备或软件设备，那么可以使用8、16、24或是32位纹理。<o:p></o:p></SPAN></SPAN></P>
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style="FONT-FAMILY: 宋体; mso-fareast-language: ZH-CN; mso-bidi-font-family: 宋体">以下主题包含了更多的信息。<SPAN 
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  href="http://www.gesoftfactory.com/developer/Textures.htm#_纹理寻址模式">纹理寻址模式</A></SPAN></U><SPAN 
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  href="http://www.gesoftfactory.com/developer/Textures.htm#脏纹理区域">无效纹理区域</A></SPAN></U><SPAN 
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<H1><A name=纹理寻址模式></A><A name=_纹理寻址模式></A><SPAN 
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