计算机图形学实验报告三

1、西安工程大学实验报告课程计算机图形学实验名称bezier曲线第 页共页系别计算机科学学院实验 日期2016年6月28日专业班级数字媒体技术组别实验报告日期年 月日姓名学号报告退发(订正、重做)e mail:教师审批评分实验名称一、实验目的和任务(1) 掌握直线的参数表示法。(2) 掌握德卡斯特里奥算法的几何意义。(3) 掌握绘制二维bezier曲线的方法。(4) 使用鼠标左键绘制个数为10以内的任意控制点，使用直线 连接构成控制 多边形。(5) 使用鼠标右键绘制bezier曲线。(6) 在状态栏显示鼠标的位置坐标。(7) bezier曲线使用徳卡斯特里奥算法绘制。二、实验环境和设备(关于实验或

2、者开发环境的描述,包括机器类型、内存、cpu主频、操作系统、 网络环境、开发语言、开发平台等)机器类型:dell pc内存:4gbcpu 主频:3. 2ghz操作系统：windows 10开发语言:c+开发平台:micro soft visual c+6. 0三、实验步骤和过程/ bezierview. cpp : implementation of the cbezierview class / #include "stdafx. h#inelude "bezier.h"#inelude "beierdoc.h#include "bezier

3、view. h"#ifdef _debug#define new debug_new#undef this_filestatic char this_f1le = _f1le_;#endif/i/ cbezierviewimplement_dyncreate(cbezierview, cview)begin message map(cbezierview, cview)/afx_msg_map(cbezierview)/ note - the classwizard will add and remove mapping macros here./ do not edit what

4、you see in these blocks of generated code!/afx_msg_map/ standstd printing commandson_cofmand(td_fti,e_prtnt, cview: :onfileprint)on.command(1d_f1le_pr1nt_d1rect, cview:0nf订eprint)on.command(id_file_print_preview, cview:onfi1eprintpreview) end_message_map()/ cbezierview construct ion/destructioncbezi

5、erview:cbezierview()/ todo: add construction code herecbezierview:cbezierview()bool cbezierview:precreatewindow(createstruct& cs)ri/ todo: modify the window class or styles here by modifying/ the createstruct csreturn cview:precreatewindow(cs);/ cbezierview drawingvoid cbezierview:ondraw(cdc* pd

6、c)cbezierdoc* pdoc = getdocument();assert_valld(pdoc);/ todo: add draw code for native data herepdc->moveto(cpoint(100, 350);pdc->lineto(cpoint(190, 100);pdc->lineto(cpoint (300,60);pdc->lineto(cpoint(500, 300);beziercurve(cpoint(100, 350),cpoint(190, 100), cpoint(300, 60), cpoint(500, 3

7、00), 100, pdc);/ cbezierview printingbool cbezierview:onprepareprinting(cprintinfo* plnfo)/ default preparationreturn doprepareprinting(plnfo);void cbezierview:onbeginprinting(cdc* /*pdc*/, cprintlnfo* /*plnfo*/)/ todo: add extra initislization before printingvoid cbezierview:onendprinting(cdc* /*pd

8、c*/, cprintlnfo* /*plnfo*/)/ todo: add cleanup after printing/i/!/ cbezierview diagnostics#ifdef debugvoid cbezierview:assertvalido constcview:assertvalid();void cbezicrvicw:dump(cdumpcontext& de) const cvi ew:dump (de);cbezierdoc* cbezierview:getdocument () / non-debug version is inline assert(

9、m_pdocument->iskindof(runttmeclass(cbezierdoc); return (cbezi erdoc*)m_pdocument;#endif /_debug / / cbezierview message handlers void cbezierview:beziercurve(cpoint po, cpoint pl, cpoint p2, cpoint p3, int count, cdc *dc)double t = 0. 0;double dt = 1.0/count;dc->moveto(po. x, po. y);cpen pen(p

10、s_solid, 2, rgb (255, 0,0);cpen *01dpen = de-sei ectobject (&pen);t = t + dt;for(int i二0;icount+l;+i)doublef1,f2, f3, f4,doubleu=1.0-t;flu*u* u;f23*t* u * u;f33*t*t * u;f4t*t* t;xx, y;p0. x*fl + pl.x*f2 + p2 x*f3 + p3.x*f4;p3. y*f4;y = p0. y*fl + pl.y*f2 + p2. y*f3 dc->lineto(int)x, (int)y);t += dt;dc->seiect0bject(oldpen); 創 hl/<<!x vltlb”