Csharp/C#教程：C#实现3D效果完整实例分享

本文实例讲述了C#实现3D效果的方法。分享给大家供大家参考，具体如下：

一、新建一类文件

privatestaticdouble[]addVector(double[]a,double[]b) { returnnewdouble[]{a[0]+b[0],a[1]+b[1],a[2]+b[2]}; } privatestaticdouble[]scalarProduct(double[]vector,doublescalar) { returnnewdouble[]{vector[0]*scalar,vector[1]*scalar,vector[2]*scalar}; } privatestaticdoubledotProduct(double[]a,double[]b) { returna[0]*b[0]+a[1]*b[1]+a[2]*b[2]; } privatestaticdoublenorm(double[]vector) { returnMath.Sqrt(dotProduct(vector,vector)); } privatestaticdouble[]normalize(double[]vector) { returnscalarProduct(vector,1.0/norm(vector)); } privatestaticdouble[]crossProduct(double[]a,double[]b) { returnnewdouble[] { (a[1]*b[2]-a[2]*b[1]), (a[2]*b[0]-a[0]*b[2]), (a[0]*b[1]-a[1]*b[0]) }; } privatestaticdouble[]vectorProductIndexed(double[]v,double[]m,inti) { returnnewdouble[] { v[i+0]*m[0]+v[i+1]*m[4]+v[i+2]*m[8]+v[i+3]*m[12], v[i+0]*m[1]+v[i+1]*m[5]+v[i+2]*m[9]+v[i+3]*m[13], v[i+0]*m[2]+v[i+1]*m[6]+v[i+2]*m[10]+v[i+3]*m[14], v[i+0]*m[3]+v[i+1]*m[7]+v[i+2]*m[11]+v[i+3]*m[15] }; } privatestaticdouble[]vectorProduct(double[]v,double[]m) { returnvectorProductIndexed(v,m,0); } privatestaticdouble[]matrixProduct(double[]a,double[]b) { double[]o1=vectorProductIndexed(a,b,0); double[]o2=vectorProductIndexed(a,b,4); double[]o3=vectorProductIndexed(a,b,8); double[]o4=vectorProductIndexed(a,b,12); returnnewdouble[] { o1[0],o1[1],o1[2],o1[3], o2[0],o2[1],o2[2],o2[3], o3[0],o3[1],o3[2],o3[3], o4[0],o4[1],o4[2],o4[3] }; } privatestaticdouble[]cameraTransform(double[]C,double[]A) { double[]w=normalize(addVector(C,scalarProduct(A,-1))); double[]y=newdouble[]{0,1,0}; double[]u=normalize(crossProduct(y,w)); double[]v=crossProduct(w,u); double[]t=scalarProduct(C,-1); returnnewdouble[] { u[0],v[0],w[0],0, u[1],v[1],w[1],0, u[2],v[2],w[2],0, dotProduct(u,t),dotProduct(v,t),dotProduct(w,t),1 }; } privatestaticdouble[]viewingTransform(doublefov,doublen,doublef) { fov*=(Math.PI/180); doublecot=1.0/Math.Tan(fov/2); returnnewdouble[]{cot,0,0,0,0,cot,0,0,0,0,(f+n)/(f-n),-1,0,0,2*f*n/(f-n),0}; } publicstaticImageGenerate(stringcaptchaText) { intfontsize=24; Fontfont=newFont("Arial",fontsize); SizeFsizeF; using(Graphicsg=Graphics.FromImage(newBitmap(1,1))) { sizeF=g.MeasureString(captchaText,font,0,StringFormat.GenericDefault); } intimage2d_x=(int)sizeF.Width; intimage2d_y=(int)(fontsize*1.3); Bitmapimage2d=newBitmap(image2d_x,image2d_y); Colorblack=Color.Black; Colorwhite=Color.White; using(Graphicsg=Graphics.FromImage(image2d)) { g.Clear(black); g.DrawString(captchaText,font,Brushes.White,0,0); } Randomrnd=newRandom(); double[]T=cameraTransform(newdouble[]{rnd.Next(-90,90),-200,rnd.Next(150,250)},newdouble[]{0,0,0}); T=matrixProduct(T,viewingTransform(60,300,3000)); double[][]coord=newdouble[image2d_x*image2d_y][]; intcount=0; for(inty=0;y<image2d_y;y+=2) { for(intx=0;x<image2d_x;x++) { intxc=x-image2d_x/2; intzc=y-image2d_y/2; doubleyc=-(double)(image2d.GetPixel(x,y).ToArgb()&0xff)/256*4; double[]xyz=newdouble[]{xc,yc,zc,1}; xyz=vectorProduct(xyz,T); coord[count]=xyz; count++; } } intimage3d_x=256; intimage3d_y=image3d_x*9/16; Bitmapimage3d=newBitmap(image3d_x,image3d_y); Colorfgcolor=Color.White; Colorbgcolor=Color.Black; using(Graphicsg=Graphics.FromImage(image3d)) { g.Clear(bgcolor); count=0; doublescale=1.75-(double)image2d_x/400; for(inty=0;y<image2d_y;y+=2) { for(intx=0;x<image2d_x;x++) { if(x>0) { doublex0=coord[count-1][0]*scale+image3d_x/2; doubley0=coord[count-1][1]*scale+image3d_y/2; doublex1=coord[count][0]*scale+image3d_x/2; doubley1=coord[count][1]*scale+image3d_y/2; g.DrawLine(newPen(fgcolor),(float)x0,(float)y0,(float)x1,(float)y1); } count++; } } } returnimage3d; }

注意引用命名空间：

usingSystem.Drawing;

二、页面调用

Response.ContentType="image/pjpeg"; Captcha.Generate("我就是3D内容").Save(Response.OutputStream,System.Drawing.Imaging.ImageFormat.Jpeg);

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