//绘制立体坐标系 GLUquadricObj *objCylinder =gluNewQuadric(); glRotatef(-45,0.0,1.0,0.0); //确定坐标系原点 glPushMatrix(); glColor3f(1.0f,1.0f, 1.0f); glTranslatef(-5,0,-5); glutSolidSphere(0.2,20,20); //glutSolidTorus(0.2,1,10,10);圆环 glPopMatrix(); //画网格线 coordpoint...