我的代码中出现了这个奇怪的错误，它不允许我绘制任何东西...voidrender(void){glClear(GL_COLOR_BUFFER_BIT);glLineWidth(4.0);glPointSize(4.0);glColor3i(0,1,1);glBegin(GL_POINTS);glVertex2i(0,0);glVertex2i(2,2);glVertex2i(3,3);glEnd();glutSwapBuffers();}intmain(intargc,char**argv){intLargura,Altura;//widthLargura=(abs(Plano::Mi