計算機圖形學實習指導

1、第五章形變1 “ransMoveprivatevoidder,EventArgsID=11;um= Graphics 第五章形變1 “ransMoveprivatevoidder,EventArgsID=11;um= Graphics g = CreateGraphics();/ (100,100);/ sgroup);/成了平移變換。具體做法是在Form1_MouseClickifum=2) = ififum0)/保X= Y= else/fori=0;i4;sgroupi.X+=ififum0)/保X= Y= else/fori=0;i=2)um = 0;/ （150,1505-1（150,

2、15011 010sin 001001011 = 0sin102e11 010sin 001001011 = 0sin102e，privatevoidder,EventArgsID=12;um= Graphics g = CreateGraphics();/ ifum=2)um0;/ifID12)/旋ifum = 0)/X= Y= else/doubleif(e.XX&e.Yif(e.XX&e.Yaifum = 0)/X= Y= else/doubleif(e.XX&e.Yif(e.XX&e.Ya= elseif(e.XX&e.Ya= Y)/(double)(e.XMatrixmyMatrix

3、=new/創(chuàng)建平移量為(-x0, -y0) /a /右乘一個平移量為(x0, y0) Graphics g = CreateGraphics();/g.Transform = myMatrix;/ sgroup);/ifum=2)um = 0;/ Graphics g = CreateGraphics();/g.Transform = myMatrix;/ sgroup);/ifum=2)um = 0;/ （100,10010010001001011 = 10010001001011 = 10 101 3先建 ，（F） Form2.CS點擊解決方案欄目中Form2.CS，打開“Form2.cs

4、MyFormOKCancel publicvoidder,EventArgsxscale=yscale=publicvoidder,EventArgsxscalepublicvoidder,EventArgsxscale=yscale=publicvoidder,EventArgsxscaleyscalepublicpartialclassMyForm:privatefloatxscale,publicpublicpartialclassMyForm:privatefloatxscale,publicfloatgetreturnthis.xscale;publicfloatgetreturnt

5、his.yscale;publicpublicxscale=(float)1.0;yscale= ransScpublicpublicxscale=(float)1.0;yscale= ransScaleprivatevoidID=floatxs,der,EventArgsID =float xs,MyFormmyfnewMyForm(); /if(myf.ShowDialog()=myf.Close(); /如果選擇的是“取消”，則關閉 xs=myf.Xscale; ys=myf.Yscale; xs=myf.Xscale; ys=myf.Yscale; GraphicsgCreateGra

6、phics();/psgroup0=newP sgroup1=newP sgroup2=newxs=myf.Xscale; ys=myf.Yscale; GraphicsgCreateGraphics();/psgroup0=newP sgroup1=newP sgroup2=newsgroup3=newpMatrixmyMatrixnewMatrix();/建立矩陣變量，為計算復合矩陣做準備 myMatrix.Translate(-100, -100);/根據(jù)縮放中心，建立平移矩陣 myMatrix.Scale(xs, ys, MatrixOrder.Append);/右乘縮放矩陣 myMa

7、trix.Translate(100, 100, MatrixOrder.Append);/右乘平移矩陣g.TransformmyMatrix;/g.DrawPolygon(Pens.Blue, （X1,Y1Y11 10010 1 000（X1,Y1Y11 10010 1 0000101010 1010 = arctg = ransSymetryprivatevoidder,EventArgsID=14;um=Graphicsg=CreateGraphics();/p=Pp ifum2um0;/ID14)/ifum0)/X=Y=p=Pp ifum2um0;/ID14)/ifum0)/X=Y=G

8、raphicsg=CreateGraphics(); XXifum=2)0;/ privatevoidif(x1x2&y1y2)/排除兩點重合的情況 doubleif(x1x2&y1y2)/特殊角 angle = 3.1415926 / 2.0;elseif(x1x2&y1y2)/特殊角 angle3.1415926 / 2.0*3.0;angle=angle=angletan(double)(y2-y1)/(double)(x2-180.03.1415926/MatrixmyMatrixangle=angle=angletan(double)(y2-y1)/(double)(x2-180.0

9、3.1415926/MatrixmyMatrixnewMatrix();/myMatrix.Translate(-x1,y1);/MatrixMyM1newMatrix(1,0,0,-1,0,0);/創(chuàng) myMatrix.Translate(x1,y1,MatrixOrder.Append);/GraphicsgCreateGraphics();/g.TransformmyMatrix;/用得到的復合矩陣對圖形進行變換g.DrawPolygon(Pens.Blue, （X1,Y1將坐標系逆時針旋轉(zhuǎn)XX軸為基軸(Y軸為依賴軸)Y11 10010 1 010001010100 1 10101 10

10、010 1 010001010100 1 1010 ransShearprivatevoidder,EventArgsID=15;um=Graphicsg=CreateGraphics();/p=Pp ifum=2)um0;/if ID =ID15)/對稱變換和錯切變if um = 0)/保X= Y= Graphicsg=CreateGraphics(); Xif um = 2)um0;/完畢，清零，為下一次做準privatevoidXif um = 2)um0;/完畢，清零，為下一次做準privatevoidif(x1x2&y1y2)/排除兩點重合的情況 doubleif(x1x2&y1y2)/特殊角 angle = 3.1415926 / 2.0;elseif(x1x2&y1y2)/特殊角 angle3.1415926 / 2.0*3.0;angle=angle=angletan(double)(y2-y1)/(double)(x2-180.03.1415926/MatrixmyMatrixnewMatrix();/myMatrix.Translate(-x1,y1);/myMatrix.Shear(float1.0,0,MatrixOrder.Append);/e(floatangle,MatrixOrder.