OpenGL学习四：矢量图形添加颜色

1.分别给点进行添加颜色
 glBegin(GL_TRIANGLES);
  glColor3f(1.0f,0.0f,0.0f);
  glVertex3f( 0.0f, 1.0f, 0.0f);
  glColor3f(0.0f,1.0f,0.0f);
  glVertex3f(-1.0f,-1.0f, 0.0f);
  glColor3f(0.0f,0.0f,1.0f);
  glVertex3f( 1.0f,-1.0f, 0.0f);
 glEnd();

2.为图形整体添加颜色
 glColor3f(0.5f,0.5f,1.0f);
 glBegin(GL_QUADS);
  glVertex3f(-1.0f, 1.0f, 0.0f);
  glVertex3f( 1.0f, 1.0f, 0.0f);
  glVertex3f( 1.0f,-1.0f, 0.0f);
  glVertex3f(-1.0f,-1.0f, 0.0f);
 glEnd();