计算机图形学曲线曲面

1、北方工业大学 计算机图形学课程实验报告题 目：实验五 曲线曲面学 院：计算机学院专 业：数字媒体技术指导教师：蔡兴泉学生班级：学生学号：学生姓名：教师评定：实验报告5 曲线曲面一实验目的1熟悉OpenGL图形库；2掌握曲线曲面实现算法。二实验环境1软件环境：操作系统：WinXp应用软件：VC6.0，OpenGL2硬件环境（查看自己的机子）CPU: Intel PIV 2.80GHz内存RAM: 1GB 显卡：NVIDIA GeForce7650，256M显存三实验内容1. 写程序实现Bezier曲线2. 写程序实现绘制3个半径不同、颜色不同的小球3. 写程序实现一个场景，绘制1个立方体、1个圆

2、锥、1个圆柱、1个茶壶四程序及结果1. Bezier曲线实现关键程序及注释void RenderScene(void) int i; glClear(GL_COLOR_BUFFER_BIT) /设置贝塞尔曲线 glMap1f(GL_MAP1_VERTEX_3, /生成的数据类型 0.0f,/u值的下界 100.0f,/ /u值的上界 3,/顶点在数据中的间隔，x,y,z所以间隔是3 nNumPoints,/u方向上的阶，即控制点的个数 &ctrlPoints00);/指向控制点数据的指针 glEnable(GL_MAP1_VERTEX_3);/ /必须在绘制顶点之前开启glBegin(GL_L

3、INE_STRIP); /使用画线的方式来连接点for(i = 0; i = 100; i+)glEvalCoord1f(GLfloat) i); /求的点坐标 glEnd(); DrawPoints();/画点 glutSwapBuffers()；/ /交换两个缓冲区指针 2. 小球绘制实现关键程序及注释void RenderScene(void) GLUquadricObj *pObj;/ 定义Quadric Object glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);/清屏 glPushMatrix();/矩阵状态 glTransl

4、atef(0.0f, -1.0f, -5.0f); glRotatef(xRot, 1.0f, 0.0f, 0.0f);/ glRotatef(yRot, 0.0f, 1.0f, 0.0f); pObj = gluNewQuadric();/创建一个新的二次曲面状态对象 gluQuadricNormals(pObj, GLU_SMOOTH);/ glPushMatrix(); glColor3f(1.0f, 1.0f, 1.0f); /定义颜色为白 glTranslatef(0.0f, 1.0f, 0.0f);/圆心坐标gluSphere(pObj, .3f, 26, 13); / 绘制小球半

5、径为0.3 glPopMatrix();glPushMatrix(); glColor3f(1.0f, 0.0f, 0.0f);/定义颜色为红glTranslatef(0.0f, 0.0f, 0.0f); / 圆心坐标 gluSphere(pObj, .5f, 26, 13);/绘制小球半径为0.5 glPopMatrix();/glPushMatrix();/ glColor3f(0.0f, 0.0f, 0.0f);/ 定义颜色为黑glTranslatef(0.0f, 2.0f, 0.0f); / 圆心坐标 gluSphere(pObj, 0.2f, 26, 13);/ 绘制小球半径为0.2

6、 glPopMatrix(); glPopMatrix();/恢复矩阵状态 glutSwapBuffers();/交换缓冲3. 场景绘制实现关键程序及注释void RenderScene(void) GLUquadricObj *pObj;/ 定义Quadric Object glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);/清屏 glPushMatrix();/保存矩阵 glTranslatef(0.0f, -1.0f, -5.0f); glRotatef(xRot, 1.0f, 0.0f, 0.0f); glRotatef(yRot,

7、0.0f, 1.0f, 0.0f); pObj = gluNewQuadric();/创建一个新的二次曲面状态对象 gluQuadricNormals(pObj, GLU_SMOOTH); /绘制正方体 glBegin(GL_QUADS); /顶面 glNormal3f(0.0f,1.0f,0.0f); glVertex3f(0.5f,0.5f,0.5f); glVertex3f(0.5f,0.5f,-0.5f); glVertex3f(-0.5f,0.5f,-0.5f); glVertex3f(-0.5f,0.5f,0.5f); glEnd(); glBegin(GL_QUADS); /底面

8、 glNormal3f(0.0f,-1.0f,0.0f); glVertex3f(0.5f,-0.5f,0.5f); glVertex3f(-0.5f,-0.5f,0.5f); glVertex3f(-0.5f,-0.5f,-0.5f); glVertex3f(0.5f,-0.5f,-0.5f); glEnd(); glBegin(GL_QUADS); /前面 glNormal3f(0.0f,0.0f,1.0f); glVertex3f(0.5f,0.5f,0.5f); glVertex3f(-0.5f,0.5f,0.5f); glVertex3f(-0.5f,-0.5f,0.5f); glV

9、ertex3f(0.5f,-0.5f,0.5f); glEnd(); glBegin(GL_QUADS); /背面 glNormal3f(0.0f,0.0f,-1.0f); glVertex3f(0.5f,0.5f,-0.5f); glVertex3f(0.5f,-0.5f,-0.5f); glVertex3f(-0.5f,-0.5f,-0.5f); glVertex3f(-0.5f,0.5f,-0.5f); glEnd(); glBegin(GL_QUADS); /左面 glNormal3f(-1.0f,0.0f,0.0f); glVertex3f(-0.5f,0.5f,0.5f); glV

10、ertex3f(-0.5f,0.5f,-0.5f); glVertex3f(-0.5f,-0.5f,-0.5f); glVertex3f(-0.5f,-0.5f,0.5f); glEnd(); glBegin(GL_QUADS); /右面 glNormal3f(1.0f,0.0f,0.0f); glVertex3f(0.5f,0.5f,0.5f); glVertex3f(0.5f,-0.5f,0.5f); glVertex3f(0.5f,-0.5f,-0.5f); glVertex3f(0.5f,0.5f,-0.5f); glEnd(); /绘制圆锥 glPushMatrix(); glCol

11、or3f(1.0f, 0.6f, 0.3f); glTranslatef(0.0f, 0.5f, 0.0f);glRotatef(-90.0f, 1.0f, 0.0f, 0.0f); gluCylinder(pObj, 0.18f, 0.0f, 0.3f, 26, 13); glPopMatrix(); / 绘制圆柱 glPushMatrix(); glColor3f(0.0f, 0.0f, 0.0f); glTranslatef(0.0f, 1.3f, 0.0f); glRotatef(-90.0f, 1.0f, 0.0f, 0.0f); gluCylinder(pObj, 0.17f, 0

12、.17f, 0.4f, 26, 13); glDisable(GL_CULL_FACE); gluDisk(pObj, 0.28f, 0.28f, 26, 13); glTranslatef(0.0f, 0.0f, 0.40f); gluDisk(pObj, 0.0f, 0.17f, 26, 13); glPopMatrix();/绘制/茶壶 glPushMatrix();glColor3f(0.0f, 1.0f, 1.0f); glTranslatef(0.0f, 1.0f, 0.0f); glutSolidTeapot(0.25f); glPopMatrix(); glPopMatrix();/ glutSwapBuffers();/交换缓冲 五实验收获通过这次实验，我熟悉了OpenGL图形库，掌握了曲线曲面的算法，.掌握了了 Bezie