📄 4.3.3 拖曳技术.htm

📁 计算机图形学教程计算机图形学教程
💻 HTM
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- saved from url=(0058)http://www.ekany.com/wdg98/cg/contents/chapter4/les433.htm -->
<HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:v = 
"urn:schemas-microsoft-com:vml" xmlns:o = 
"urn:schemas-microsoft-com:office:office" xmlns:w = 
"urn:schemas-microsoft-com:office:word"><HEAD><TITLE>4</TITLE>
<META http-equiv=Content-Type content="text/html; charset=GB2312">
<META content=FrontPage.Editor.Document name=ProgId>
<META content="MSHTML 6.00.2800.1106" name=GENERATOR>
<META content="Microsoft Word 9" name=Originator><LINK 
href="les433.files/filelist.xml" rel=File-List><LINK 
href="les433.files/editdata.mso" rel=Edit-Time-Data><!--[if !mso]>
<STYLE>v\:* {
	BEHAVIOR: url(#default#VML)
}
o\:* {
	BEHAVIOR: url(#default#VML)
}
w\:* {
	BEHAVIOR: url(#default#VML)
}
.shape {
	BEHAVIOR: url(#default#VML)
}
</STYLE>
<![endif]--><!--[if gte mso 9]><xml> <o:DocumentProperties>  <o:Author>zlj</o:Author>  <o:Template>Normal</o:Template>  <o:LastAuthor>zlj</o:LastAuthor>  <o:Revision>1</o:Revision>  <o:TotalTime>3</o:TotalTime>  <o:Created>1999-04-16T03:04:00Z</o:Created>  <o:LastSaved>1999-04-16T03:07:00Z</o:LastSaved>  <o:Pages>1</o:Pages>  <o:Company>CSCIMS</o:Company>  <o:Lines>1</o:Lines>  <o:Paragraphs>1</o:Paragraphs>  <o:Version>9.2812</o:Version> </o:DocumentProperties></xml><![endif]--><!--[if gte mso 9]><xml> <w:WordDocument>  <w:PunctuationKerning/>  <w:DrawingGridVerticalSpacing>7.8 磅</w:DrawingGridVerticalSpacing>  <w:DisplayHorizontalDrawingGridEvery>0</w:DisplayHorizontalDrawingGridEvery>  <w:DisplayVerticalDrawingGridEvery>2</w:DisplayVerticalDrawingGridEvery>  <w:Compatibility>   <w:SpaceForUL/>   <w:BalanceSingleByteDoubleByteWidth/>   <w:DoNotLeaveBackslashAlone/>   <w:ULTrailSpace/>   <w:DoNotExpandShiftReturn/>   <w:AdjustLineHeightInTable/>   <w:UseFELayout/>  </w:Compatibility> </w:WordDocument></xml><![endif]-->
<STYLE>@font-face {
	font-family: 宋体;
}
@font-face {
	font-family: 楷体_GB2312;
}
@font-face {
	font-family: @宋体;
}
@font-face {
	font-family: @楷体_GB2312;
}
@page  {mso-page-border-surround-header: no; mso-page-border-surround-footer: no; }
@page Section1 {size: 595.3pt 841.9pt; margin: 72.0pt 90.0pt 72.0pt 90.0pt; mso-header-margin: 42.55pt; mso-footer-margin: 49.6pt; mso-paper-source: 0; layout-grid: 15.6pt; }
P.MsoNormal {
	TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify; mso-style-parent: ""; mso-pagination: none; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt
}
LI.MsoNormal {
	TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify; mso-style-parent: ""; mso-pagination: none; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt
}
DIV.MsoNormal {
	TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify; mso-style-parent: ""; mso-pagination: none; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt
}
H3 {
	TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 16pt; MARGIN: 13pt 0cm; TEXT-INDENT: 21.25pt; LINE-HEIGHT: 173%; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify; mso-fareast-language: EN-US; mso-pagination: lines-together; mso-fareast-font-family: 楷体_GB2312; mso-font-kerning: 1.0pt; mso-style-next: 正文; mso-outline-level: 3; mso-layout-grid-align: none
}
P.MsoBodyTextIndent {
	TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 12pt; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; FONT-FAMILY: 宋体; TEXT-ALIGN: justify; mso-fareast-language: EN-US; mso-pagination: none; mso-font-kerning: 1.0pt; mso-layout-grid-align: none; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"
}
LI.MsoBodyTextIndent {
	TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 12pt; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; FONT-FAMILY: 宋体; TEXT-ALIGN: justify; mso-fareast-language: EN-US; mso-pagination: none; mso-font-kerning: 1.0pt; mso-layout-grid-align: none; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"
}
DIV.MsoBodyTextIndent {
	TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 12pt; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; FONT-FAMILY: 宋体; TEXT-ALIGN: justify; mso-fareast-language: EN-US; mso-pagination: none; mso-font-kerning: 1.0pt; mso-layout-grid-align: none; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"
}
A:link {
	COLOR: blue; TEXT-DECORATION: underline; text-underline: single
}
SPAN.MsoHyperlink {
	COLOR: blue; TEXT-DECORATION: underline; text-underline: single
}
A:visited {
	COLOR: purple; TEXT-DECORATION: underline; text-underline: single
}
SPAN.MsoHyperlinkFollowed {
	COLOR: purple; TEXT-DECORATION: underline; text-underline: single
}
P.MsoDocumentMap {
	TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; BACKGROUND: navy; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify; mso-pagination: none; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt
}
LI.MsoDocumentMap {
	TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; BACKGROUND: navy; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify; mso-pagination: none; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt
}
DIV.MsoDocumentMap {
	TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; BACKGROUND: navy; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify; mso-pagination: none; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt
}
DIV.Section1 {
	page: Section1
}
</STYLE>
<!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="1027"/></xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit">  <o:idmap v:ext="edit" data="1"/> </o:shapelayout></xml><![endif]--></HEAD>
<BODY lang=ZH-CN style="TEXT-JUSTIFY-TRIM: punctuation; tab-interval: 21.0pt" 
vLink=purple link=blue>
<H3 style="TEXT-INDENT: 0cm"><FONT face=楷体_GB2312 size=4><SPAN lang=EN-US 
style="mso-fareast-language: ZH-CN">4.3.3 </SPAN><SPAN 
style="FONT-FAMILY: 楷体_GB2312; mso-fareast-language: ZH-CN; mso-ascii-font-family: 'Times New Roman'">拖曳技术</SPAN><SPAN 
lang=EN-US style="mso-fareast-language: ZH-CN"><o:p></o:p></SPAN></FONT></H3>
<P class=MsoBodyTextIndent><SPAN style="mso-fareast-language: ZH-CN"><FONT 
face=楷体_GB2312 
size=4>在复杂物体的模型设计中，常用到拼装操作。拖曳技术常被用于拼装定位和其他一些操作如布局操作中去，以便使上述工作直观、简便、高效。<SPAN 
lang=EN-US><o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoBodyTextIndent><SPAN style="mso-fareast-language: ZH-CN"><FONT 
face=楷体_GB2312 
size=4>拖曳技术以取样定位输入为基础，应用程序不断地读取定位器位置，在每一老位置上擦去原有对象图形，再在新位置上显示该对象图形，从而使对象的图形被操作员在屏幕上拖曳到适当位置。这里，显示和擦除图形的操作与橡皮条一样使用异或方式，以便不影响其他图形。图<SPAN 
lang=EN-US>4.3.5给出了拖曳一电路元件的示意。<o:p></o:p></SPAN></FONT></SPAN></P>
<P class=MsoBodyTextIndent style="TEXT-INDENT: 0cm"><SPAN lang=EN-US 
style="mso-fareast-language: ZH-CN"><FONT face=楷体_GB2312 size=4><![if !supportEmptyParas]><![endif]>&nbsp;<o:p></o:p></FONT></SPAN></P>
<P class=MsoBodyTextIndent style="TEXT-INDENT: 0cm"><SPAN lang=EN-US 
style="mso-fareast-language: ZH-CN"><FONT face=楷体_GB2312 size=4><!--[if gte vml 1]><v:shapetype id=_x0000_t75 coordsize = "21600,21600" 
o:preferrelative = "t" o:spt = "75" filled = "f" stroked = "f" path = 
" m@4@5 l@4@11@9@11@9@5 xe"><v:stroke joinstyle = 
"miter"></v:stroke><v:formulas><v:f eqn = 
"if lineDrawn pixelLineWidth 0 "></v:f><v:f eqn = "sum @0 1 0 "></v:f><v:f eqn = 
"sum 0 0 @1 "></v:f><v:f eqn = "prod @2 1 2 "></v:f><v:f eqn = 
"prod @3 21600 pixelWidth "></v:f><v:f eqn = 
"prod @3 21600 pixelHeight "></v:f><v:f eqn = "sum @0 0 1 "></v:f><v:f eqn = 
"prod @6 1 2 "></v:f><v:f eqn = "prod @7 21600 pixelWidth "></v:f><v:f eqn = 
"sum @8 21600 0 "></v:f><v:f eqn = "prod @7 21600 pixelHeight "></v:f><v:f eqn = 
"sum @10 21600 0 "></v:f></v:formulas><v:path o:extrusionok = "f" 
gradientshapeok = "t" o:connecttype = "rect"></v:path><o:lock aspectratio="t" 
v:ext="edit"></o:lock></v:shapetype><v:shape id=_x0000_i1025 
style="WIDTH: 272.25pt; HEIGHT: 189.75pt" type = "#_x0000_t75" coordsize = 
"21600,21600"><v:imagedata o:title="4-3-5" src = 
"./les433.files/image002.gif"></v:imagedata></v:shape><![endif]--><![if !vml]><img width=363 height=253src="les433.files/image002.gif" v:shapes="_x0000_i1025"><![endif]><o:p></o:p></FONT></SPAN></P>
<P class=MsoBodyTextIndent style="TEXT-INDENT: 0cm"><FONT face=楷体_GB2312 size=4><!--[if gte vml 1]><v:shapetype id=_x0000_t202 coordsize = "21600,21600" 
o:spt = "202" path = " m0,0 l0,21600,21600,21600,21600,0 xe"><v:stroke joinstyle 
= "miter"></v:stroke><v:path gradientshapeok = "t" o:connecttype = 
"rect"></v:path></v:shapetype><v:shape id=_x0000_s1026 
style="MARGIN-TOP: 7.95pt; Z-INDEX: 1; LEFT: 0px; MARGIN-LEFT: 0px; WIDTH: 162pt; POSITION: absolute; HEIGHT: 28.45pt; TEXT-ALIGN: left; mso-position-horizontal: left; mso-position-vertical: absolute" 
type = "#_x0000_t202" coordsize = "21600,21600" stroked = "f"><v:textbox 
style="MARGIN-TOP: 4.031pt; LEFT: auto; MARGIN-LEFT: 7.937pt; WIDTH: 147.625pt; TOP: auto; HEIGHT: 21.25pt"><![if !mso]>
<TABLE cellSpacing=0 cellPadding=0 width="100%">
  <TBODY>
  <TR>
    <TD><![endif]>
      <DIV>
      <P class=MsoNormal><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图</SPAN><SPAN 
      lang=EN-US style="FONT-SIZE: 9pt"> 4.3.5 </SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">拖曳一个二极管符号</SPAN></P></DIV><![if !mso]></TD></TR></TBODY></TABLE><![endif]></v:textbox><w:wrap 
type = "square"></w:wrap></v:shape><![endif]--><![if !vml]><img width=218 height=40src="les433.files/image003.gif" align=left hspace=12alt="文本框: 图 4.3.5 拖曳一个二极管符号" v:shapes="_x0000_s1026"><![endif]><SPAN 
lang=EN-US style="mso-fareast-language: ZH-CN"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><SPAN lang=EN-US><FONT face=楷体_GB2312 size=4><![if !supportEmptyParas]><![endif]>&nbsp;<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US><FONT face=楷体_GB2312 size=4><![if !supportEmptyParas]><![endif]>&nbsp;<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US><FONT face=楷体_GB2312 size=4><![if !supportEmptyParas]><![endif]>&nbsp;<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US><A 
href="http://www.ekany.com/wdg98/cg/contents/chapter4/les432.htm"><FONT 
face=楷体_GB2312 size=4>&lt;<SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">上一节</SPAN>&gt;&nbsp;</FONT></A><FONT 
face=楷体_GB2312 size=4>&nbsp; <A 
href="http://www.ekany.com/wdg98/cg/contents/chapter4/les434.htm">&lt;<SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">下一节</SPAN>&gt; 
</A>&nbsp; <A 
href="http://www.ekany.com/wdg98/cg/tutorial/chapter4/lesson4-3.htm">&lt;</A></FONT></SPAN><FONT 
face=楷体_GB2312 size=4><A 
href="http://www.ekany.com/wdg98/cg/tutorial/chapter4/lesson4-3.htm"><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">返回</SPAN><SPAN 
lang=EN-US>&gt;</SPAN></A></FONT></P></BODY></HTML>
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -