glRotatef(30.0f,0.0f,1.0f,0.0f)第一个参数是指什么?表示模型物体绕Y轴逆时针旋转30?还是理解为坐标系顺时针旋转30..glPushMatrix();glRotatef(ballR,0.0f,1.0f,0.0f);glTranslatef(-0.8,0.0f,0.0f);glColor3ub(255,0,0);glutSolidSphere(0.1f,15,15);glPopMatrix();...