GLUT 不同的物体使用不同的材料

Question

我有一个应该模仿阳光的光源，但效果不是很好。目前正从每个物体后面稍微传来，就像在 4 点钟位置。我想为不同的对象设置不同的光泽度和材质，但是即使当我更改 1 个参数或添加新材质时功能是分开的，它似乎也会为渲染场景中的每个对象更改它

void setLight(void)
{
    GLfloat L0position[]={30.0, 10.0, 40.0, 1.0};
    GLfloat whitelight[]={1.0, 1.0, 1.0, 1.0};      // white
    GLfloat blacklight[]={0.0, 0.0, 0.0, 1.0};      // black

    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, amblight); //background lighting

    glLightfv(GL_LIGHT0, GL_AMBIENT, blacklight);
    glLightfv(GL_LIGHT0, GL_SPECULAR, whitelight);
    glLightfv(GL_LIGHT0, GL_DIFFUSE, whitelight);
    glLightfv(GL_LIGHT0, GL_POSITION, L0position);
    //glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 100);
    //glLightf(GL_LIGHT0,GL_SHININESS,100);

    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);

}

例如，我有 drawknight() 和 drawdragon() 函数，当我更改它们的材质值时，它也会影响其他对象，即使我最后禁用了“GL_COLOR_MATERIAL”（drawknight 与 drawdragon 几乎相同）

void drawKnight() {
GLfloat specular[]={1, 1, 1,1};
GLfloat emission[]={0, 0, 0,1};

glEnable(GL_COLOR_MATERIAL);
glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
glMaterialfv(GL_BACK, GL_SPECULAR, specular);
glMaterialfv(GL_BACK, GL_EMISSION, emission);
glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 1000000);

glColor3f(0.99f, 0.765f, 0.890f);
// Draw Body
    glPushMatrix();
        glTranslatef(0.0f ,0.0f, 0.0f);
        glRotatef(270.0f,1.0f, 0.0f, 0.0f);
        gluCylinder(objCylinder, 1,2, 3, 10, 2);
    glPopMatrix();

// Draw Head
    glPushMatrix();
        glTranslatef(0.0f, 4.0f, 0.0f);
        glRotatef(270.0f,1.0f, 0.0f, 0.0f);
        glutSolidSphere(2,20,20);
    glPopMatrix();

//Draw sword
    glPushMatrix();
     glColor3f(0.0f,0.0f,1.0f);
        glTranslatef(-2.1f, 2.0f, 0.0f);
        glScalef(0.5,0.5,0.5);
        glRotatef(240.0f,1.0f, 0.0f, 0.0f);
        glutSolidCone(2,10,10,10);
    glPopMatrix();

glDisable(GL_COLOR_MATERIAL);
}

这里是渲染场景

void renderScene(void) {
    glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    setLight();

    GLfloat specular[]={0.3, 0.3, 0.3};

    glEnable(GL_COLOR_MATERIAL);
    glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
    glMaterialfv(GL_BACK, GL_SPECULAR, specular);
    glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 0);

   glColor3f(0.9f, 0.9f, 0.9f);
   glBegin(GL_QUADS);
        glVertex3f(-500.0f, 0.0f, -500.0f);
        glVertex3f(-500.0f, 0.0f,  500.0f);
        glVertex3f( 500.0f, 0.0f,  500.0f);
        glVertex3f( 500.0f, 0.0f, -500.0f);
   glEnd();

    glPushMatrix();
        glTranslatef(75,0,-80);
        glRotatef(270.0f,1.0f, 0.0f, 0.0f);
        glColor3f(1.0f,0.4f,0.2f);
        gluCylinder(objCylinder, 5, 5, 10, 10, 2);
    glPopMatrix();
      .
      .
      .

    //KNIGHT
    glPushMatrix();
        glTranslatef(x_knight, y_knight,z_knight);
        drawKnight();
    glPopMatrix();

 glutSwapBuffers();
}

如何解决这个问题，如何设置每个对象的材料和光泽度？