如何在OpenGL中仅为一个对象设置材质？

// 定义材质结构体
typedef struct {
    GLfloat ambient[4];
    GLfloat diffuse[4];
    GLfloat specular[4];
    GLfloat shininess;
} Material;

// 设置材质属性
Material material;
material.ambient = {0.2, 0.2, 0.2, 1.0};
material.diffuse = {0.8, 0.8, 0.8, 1.0};
material.specular = {1.0, 1.0, 1.0, 1.0};
material.shininess = 32.0;

// 启用光照
glEnable(GL_LIGHTING);

// 渲染对象
glPushMatrix();
glMaterialfv(GL_FRONT, GL_AMBIENT, material.ambient);
glMaterialfv(GL_FRONT, GL_DIFFUSE, material.diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, material.specular);
glMaterialf(GL_FRONT, GL_SHININESS, material.shininess);
// 绘制对象的代码
glPopMatrix();