计算机图形学课程实验：代码实现一个基于简单光照模型的三维圆环体的真实感显示，用openGL实现，给出完整代码

很好，这是一个比较经典的计算机图形学实验，我可以给您提供一个基于OpenGL实现的简单光照模型的三维圆环体真实感显示的代码，希望对您有所帮助。

代码如下：

#include <GL/glut.h>
#include <math.h>

void init(void) {
    // 设置光照模型
    GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
    GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
    GLfloat mat_shininess[] = { 50.0 };
    GLfloat light_ambient[] = { 0.2, 0.2, 0.2, 1.0 };
    GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };

    glClearColor(0.0, 0.0, 0.0, 0.0);
    glShadeModel(GL_SMOOTH);

    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);
    glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
    glLightfv(GL_LIGHT0, GL_SPECULAR, mat_specular);

    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);

    glEnable(GL_DEPTH_TEST);
}

void display(void) {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    // 绘制圆环体
    int i;
    float x, y, z, theta;
    float radius1 = 1.0;
    float radius2 = 0.5;
    float height = 2.0;
    int num_slices = 30;
    int num_stacks = 10;

    for (i = 0; i < num_slices; i++) {
        glBegin(GL_QUAD_STRIP);
        for (int j = 0; j <= num_stacks; j++) {
            theta = i * 2.0 * M_PI / num_slices;
            x = (radius1 + radius2 * cos(theta)) * cos(j * M_PI / num_stacks);
            y = (radius1 + radius2 * cos(theta)) * sin(j * M_PI / num_stacks);
            z = radius2 * sin(theta) + height / 2.0;
            glNormal3f(cos(theta) * cos(j * M_PI / num_stacks), cos(theta) * sin(j * M_PI / num_stacks), sin(theta));
            glVertex3f(x, y, z);

            x = (radius1 + radius2 * cos(theta + 2.0 * M_PI / num_slices)) * cos(j * M_PI / num_stacks);
            y = (radius1 + radius2 * cos(theta + 2.0 * M_PI / num_slices)) * sin(j * M_PI / num_stacks);
            z = radius2 * sin(theta + 2.0 * M_PI / num_slices) + height / 2.0;
            glNormal3f(cos(theta + 2.0 * M_PI / num_slices) * cos(j * M_PI / num_stacks), cos(theta + 2.0 * M_PI / num_slices) * sin(j * M_PI / num_stacks), sin(theta + 2.0 * M_PI / num_slices));
            glVertex3f(x, y, z);
        }
        glEnd();
    }

    glFlush();
}

void reshape(int w, int h) {
    glViewport(0, 0, (GLsizei)w, (GLsizei)h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(60.0, (GLfloat)w / (GLfloat)h, 1.0, 20.0);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
}

int main(int argc, char** argv) {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
    glutInitWindowSize(500, 500);
    glutInitWindowPosition(100, 100);
    glutCreateWindow("OpenGL Sphere");
    init();
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutMainLoop();
    return 0;
}

希望这份代码对您有所帮助！