上机实验报告1

上机实验报告计算机图形学实验题目班级姓名学号任课教师直线与圆的扫描转换计算机科学与技术一班李倩文20110854126刘慧实验目的与要求：编写程序实现直线的扫描转换。编写程序实现圆的扫描转换。实验步骤与内容：（可加附页）用Bresenham算法画一条起点为（50，50），终点为（150，150）的直线。（1）用正负法画一个圆心为（100，100），R=50的1/4圆。（2）用正负法画一个圆心为（100，100），R=50的整圆。程序清单：（1）.用Bresenham算法画一条起点为（50，50），终点为（150，150）的直线。importjavax.swing.*;importjava.awt.*;classSetPixelextendsJPanel{ Colorcolor; intstartX,startY,endX,endY; publicSetPixel() { color=Color.blue; startX=50; startY=50; endX=150; endY=150; } publicvoidpaintComponent(Graphicsg) { g.setColor(color); Bresenham(g,startX,startY,endX,endY); } voidBresenham(Graphicsg,intxs,intys,intxe,intye){ intdx=xe-xs; intdy=ye-ys; inte=2*dy-dx; intx=xs; inty=ys; for(inti=0;i<dx;i++){ g.drawLine(x,y,x,y); if(e>=0){y=y+1; e=e-2*dx; } x=x+1; e=e+2*dy; } } }publicclassPixelWindowextendsJFrame{ publicPixelWindow(){ super("PixelColor"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(newRectangle(100,100,300,300)); SetPixelset=newSetPixel(); add(set);} /** *@paramargs */ @SuppressWarnings("deprecation") publicstaticvoidmain(String[]args){ //TODOAuto-generatedmethodstubPixelWindowsetPixel=newPixelWindow();setPixel.setVisible(true); }}2、用正负法画一个圆心为（100，100），R=50的1/4圆。importjavax.swing.*;importjava.awt.*;classSetPixelextendsJPanel{ Colorcolor; intradius; publicSetPixel() { color=Color.blue; radius=50; } publicvoidpaintComponent(Graphicsg) { g.setColor(color); pnarc(g,radius); } voidpnarc(Graphicsg,intradius){ intx,y,f; x=0; y=0+radius; f=0; while(y>0){ g.drawLine(x,y,x,y); if(f>0){ f=f-2*y+1; y--; }else{ f=f+2*x+1; x++; } } if(y==0)g.drawLine(x,y,x,y);}}publicclassPixelWindowextendsJFrame{ publicPixelWindow(){ super("PixelColor"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(newRectangle(100,100,300,300)); SetPixelset=newSetPixel(); add(set);} /** *@paramargs */ @SuppressWarnings("deprecation") publicstaticvoidmain(String[]args){ //TODOAuto-generatedmethodstubPixelWindowsetPixel=newPixelWindow();setPixel.setVisible(true); }}遗留问题与说明：备注：年月日程序清单（操作步骤）

importjavax.swing.*;importjava.awt.*;publicclassSetPixelextendsJPanel{ {Colorcolor; intstartX,startY,endX,endY; publicSetPixel() { color=Color.blue; startX=50; startY=50; endX=150; endY=150; } publicvoidpaintComponent(Graphicsg) { g.setColor(color); Bresenham(Graphicsg,intxs,intys,intxe,intye); } }voidBresenham(Graphicsg,intxs,intys,intxe,intye){ intdx=xe-xs; intdy=ye-ys; inte=2*dy-dx; intx=xs; inty=ys; for(inti=0;i<dx;i++){ g.drawLine(x,y,x,y); if(e>=0){y=y+1; e=e-2*dx; } x=x+1; e=e+2*dy; } }publicclassPixelWindowextendsJFrame{publicPixelWindow(){ super("PixelColor") setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(newRectangle(100,100,300,300)); SetPixelset=newSetPixel(); add(set); }} /** *@paramargs */ @SuppressWarnings("deprecation") publicstati