做可变截面扫描时应注意:
1.只有一条轨迹线时,截面可以是规则曲线,如圆、椭圆等,这时截面的变化可由方程驱动。如下图
<img src="attachments/dvbbs/2004-4/200441415301884362.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-4/200441415301884362.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
2.有多条轨迹时,截面应使用圆锥曲线、样条曲线,否则无法生成。如下图:
<img src="attachments/dvbbs/2004-4/200441415375836018.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-4/200441415375836018.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
[此贴子已经被作者于2004-4-14 15:38:22编辑过]
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