OPENGL绘图，颜色设置问题

[hapure]

我用OPENGL绘制三个天体的关键代码如下，但是出来的结果怎么三个球体都是红色的啊？谁能
告诉我原因？

// 绘制红色的“太阳”
glColor3f(1.0f, 0.0f, 0.0f);
glutSolidSphere(69600000, 20, 20);
// 绘制蓝色的“地球”
glClearColor(0.0f, 0.0f, 1.0f,0.0f);
glColor3f(0.0f, 0.0f, 1.0f);
glRotatef(day/360.0*360.0, 0.0f, 0.0f, -1.0f);
glTranslatef(150000000, 0.0f, 0.0f);
glutSolidSphere(15945000, 20, 20);
// 绘制黄色的“月亮”
glColor3f(1.0f, 1.0f, 0.0f);
glRotatef(day/30.0*360.0 - day/360.0*360.0, 0.0f, 0.0f, -1.0f);
glTranslatef(38000000, 0.0f, 0.0f);
glutSolidSphere(4345000, 20, 20);

[mandarin]

帮顶，以前在学校的时候做过，现在全忘了

[Cyrosly]

首先,就是球体,什么天体啊~~.其次看下面

glColor3f(1.0f, 0.0f, 0.0f); 
glutSolidSphere(69600000, 20,20);  
glClearColor(0.0f, 0.0f, 1.0f,0.0f); //这是没必要的,它的功能只是设置当前framebuffer的清除颜色(或者说是背景颜色)
,而不是要被绘制的几何体的颜色.如果你的背景在整个动画过程中保持不变则只在初始化时指定一次就可以了.
因为实际的清除操作是glClear(GL_COLOR_BUFFER_BIT)完成的
glColor3f(0.0f, 0.0f, 1.0f); 
//glLoadIdentity();你可能需要各个球体的变换互不影响
glRotatef(day/360.0*360.0,0.0f,0.0f,-1.0f); 
glTranslatef(150000000,0.0f,0.0f); 
glutSolidSphere(15945000,20,20); 
glColor3f(1.0f,1.0f, 0.0f);
//glLoadIdentity();
glRotatef(day/30.0*360.0-day/360.0*360.0,0.0f,0.0f,-1.0f); 
glTranslatef(38000000,0.0f,0.0f); 
glutSolidSphere(4345000,20,20);