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1、实验3OpenGL基本图元绘制7/7实验3、OpenGL基本图元绘制系别：计算机学院专业班级：10信科2班姓名：学号：实验日期：2013-5-10实验报告日期：2013-5-10一、实验目的1熟悉VC6.0开发平台；2熟悉OpenGL开发库；二、实验内容：1.在同一个窗口内绘制以下图元：Ø用不同颜色绘制大小从1到5的5个点；Ø用不同颜色绘制宽度为1、3、5的三条直线段；Ø绘制一条包含5个顶点的折线段；Ø绘制一个三角形，三个顶点颜色各不相同，三角形内部用平滑方式进行填充；Ø绘制一个六边形；2.，不使用反混淆绘制宽度为5的直线；启用反混淆后在
2、不同位置绘制相同的直线，比较两者异同。三、一个OpenGL实例1.程序中有关画图的代码：voidDrawGLScene(GLvoid)//此函数完成图形绘制{glClear(GL_COLOR_BUFFER_BIT
3、GL_DEPTH_BUFFER_BIT);//清除颜色缓冲区和深度缓冲区glLoadIdentity();//重置当前模型视图矩阵glTranslatef(-1.5f,0.0f,0.0f);//向左平移50个单位glBegin(GL_TRIANGLES);//绘制三角形glColor3f(1.0f,0.0f,0.0f);//画笔
4、设置为红色glVertex3f(0.0f,1.0f,0.0f);glColor3f(0.0f,1.0f,0.0f);//设置为绿色glVertex3f(-1.0f,-1.0f,0.0f);glColor3f(0.0f,0.0f,1.0f);//设置为蓝色glVertex3f(1.0f,-1.0f,0.0f);glEnd();//完成三角形的绘制glTranslatef(3.0f,0.0f,0.0f);//向右平移3个单位glColor3f(0.0f,1.0f,1.0f);//设为青色glBegin(GL_QUADS);//画四边形glVe
5、rtex3f(-1.0f,1.0f,0.0f);glVertex3f(1.0f,1.0f,0.0f);glVertex3f(1.0f,-1.0f,0.0f);glVertex3f(-1.0f,-1.0f,0.0f);/glEnd();//完成四边形绘制glFlush();}实验3OpenGL基本图元绘制7/7一、实验报告内容1程序源码；2对主要画图函数的说明（函数的功能，参数等）。//图形.cpp:Definestheentrypointfortheconsoleapplication.//#include#incl
6、ude#include#include#defineMAX10^6;//如果需要记录鼠标点的位置，就定义全局变量来保存structPoint{intx,y;};Pointpt[2];intpointNum=0;//标记点号，0表示线段起点，1表示线段中点voidMyDrawGLScene()//此函数完成图形绘制{inti;floatpSizes[5]={1.0f,2.0f,3.0f,4.0f,5.0f};//设定五个点的大小floatlWidth[5]={1.0f,2.0f,3
7、.0f,4.0f,5.0f};//设定五条直线的宽度glClear(GL_COLOR_BUFFER_BIT
8、GL_DEPTH_BUFFER_BIT);//清除颜色缓冲区和深度缓冲区glLoadIdentity();//重置当前模型视图矩阵glTranslatef(-1.8f,-0.1f,0.0f);//向左平移50个单位//绘制五个大小不同的的点glEnable(GL_POINT_SMOOTH);//开启反混淆for(i=0;i<5;i++){//绘制五个大小不同的的点glPointSize(pSizes[i]);glTranslatef
9、(0.1f,-0.0f,0.0f);//向右平移50个单位glBegin(GL_POINTS);glColor3f(1.0f,0.0f,0.0f);//画笔设置为红色glVertex2f(1.0f,1.0f);glEnd();}实验3OpenGL基本图元绘制7/7//绘制五条不同宽度的直线glTranslatef(-0.5f,-0.1f,0.0f);//向左平移50个单位for(i=0;i<5;i++)//绘制五条不同宽度的直线{glTranslatef(0.0f,-0.1f,0.0f);glLineWidth(lWidth[i]);//
10、设定直线的宽度glBegin(GL_LINES);glColor3f(0.0f,1.0f,0.0f);//画笔设置为绿色glVertex2f(1.0f,1.0f);glVertex2f(2.0
