使用单个GL_TRIANGLE_STRIP绘制A

Question

这个是可能的吗？(我知道，是的，但我做不到。)

void drawScene(void)
{  

   glClear(GL_COLOR_BUFFER_BIT);
   glColor3f(0.0, 0.0, 0.0);
   if (isWire) 
       glPolygonMode(GL_FRONT, GL_LINE);
   else
   glPolygonMode(GL_FRONT, GL_FILL);

   glBegin(GL_TRIANGLE_STRIP);
   glVertex3f(10,10,0);
   glVertex3f(20,10,0);

   glVertex3f(30,80,0);
   glVertex3f(40,70,0);

   glVertex3f(50,80,0);
   glVertex3f(60,10,0);

   glVertex3f(70,10,0);
   glEnd();

   glBegin(GL_TRIANGLE_STRIP);

   glEnd();

   glFlush();
}

这是我的尝试，虽然我的下一个想法是架起A的两条腿，但我想把它放在一条单条上。

Answer 1

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在我朋友几何学的帮助下:)

void drawScene(void)
{  

   glClear(GL_COLOR_BUFFER_BIT);
   glColor3f(0.0, 0.0, 0.0);
   if (isWire) 
       glPolygonMode(GL_FRONT, GL_LINE);
   else
   glPolygonMode(GL_FRONT, GL_FILL);

     // Draw a triangle strip.
   glBegin(GL_TRIANGLE_STRIP);
      glVertex3f(10.0, 10.0, 0.0);
  glVertex3f(20.0, 10.0, 0.0);
  glVertex3f(12.0, 30.0, 0.0);
  glVertex3f(22.0, 30.0, 0.0);
  glVertex3f(17.0, 80.0, 0.0);
  glVertex3f(26.0, 70.0, 0.0);
  glVertex3f(35.0, 80.0, 0.0);
  glVertex3f(31.0, 40.0, 0.0);
  glVertex3f(42.0, 35.0, 0.0);
  glVertex3f(23.0, 40.0, 0.0);
  glVertex3f(25.0, 35.0, 0.0);
  glVertex3f(21.9, 30.0,0.0); 

  glVertex3f(42.0, 35.0, 0.0);
  glVertex3f(32.0, 30.0, 0.0);
  glVertex3f(46.0, 10.0, 0.0);
  glVertex3f(36.5, 10.0, 0.0);
   glEnd();


   glFlush();
}