华南理工大学计算机图形学实验

华南理工大学图形学实验

一、 1.Please download and install the glut library. 2.Write a complete program using the following codes to draw a Sierpinski gasket. void myinit() { // attributes glClearColor(1.0,1.0,1.0,1.0); glColor3f(1.0,0.0,0.0); // set up viewing glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(0.0, 50.0,0.0,50.0); glMatrixMode(GL_MODELVIEW); } void display() { GLfloat vertices[3][3] = {{0.0,0.0,0.0}, {25.0, 50.0,0.0}, {50.0,0.0,0.0}}; // an arbitrary triangle in the plane z = 0; GLfloat p[3] = {7.5, 5.0, 0.0}; // or set any desired initial point which is inside the triangle; int j,k; int rand(); glBegin(GL_POINTS); for (k = 0; k < 5000; k++) { /* pick a random vertex from 0, 1, 2*/ j = rand()%3; // compute new location; p[0] = (p[0]+vertices[j][0])/2; p[1] = (p[1]+vertices[j][1])/2; // display new point glVertex3fv(p); } glEnd(); glFlush(); } #include void main(int argc, char **argv) { glutInit(&argc;, argv); glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB); glutInitAWindowSize(500,500); glutInitWindowPosition(0,0); glutCreateWindow(“Simple OpenGL Example”); glutDisplayFunc(display); myinit(); glutMainLoop(); } 3.实现 DDA 和 Bresenham 画线算法 (1)画10万以上随机生成的直线段，比较两个算法的平均时间. (2)分别把屏幕上的1*1，5*5, 9*9像素当作直线段上的一个点，观察线段的走样情况. 二、请写一个OpenGL （如果熟悉WebGL也可以用）程序完成如下任务 (1)读入三维网格模型的obj文件; (2)用OpenGL函数glTranslatef()对模型模型进行平移，使得其重心位于原点; (3)用函数glLookAt()设置视点，并且要求试点绕模型一周，以便用透视投影观察各个侧面; (4)要求利用真实感绘制对模型进行渲染. (利用OpenGL函数设置光源，材质，计算好每个三角形的法向量后，利用OpenGL的glNormal函数给待绘制的三角形设置法向量). 绘制的结果大概如下：三、本实验为综合实验, 任务是利用光线跟踪算法进行Whitted全局光照计算，并对读入场景进行真实感绘制。（特别提醒: 网上类似的projects可以参考，但不能照抄. 如http://tobias.isenberg.cc/graphics/LabSessions/RaytracingProject, http://physbam.stanford.edu/links/ray_tracing/project_ray_tracing.html https://www.cs.utexas.edu/~fussell/courses/cs354/assignments/raytracing/handout.shtml ） (1)参加对象: 本实验针对所有选课同学，3-5人组成一个小组，共同实现；非15级同学在组队方面有困难的话可与老师沟通. (2)实验结果提交: 每人都要求提交一份. 内容包括 a.源程序; 可执行代码; 三维场景数据; 同组的同学这部

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mukes :

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2018-12-28
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2018-12-28

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华南理工大学计算机图形学实验

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