Why won't this display the front face of the triangle with lines.


Code:

		glBegin(GL_TRIANGLES);
		glPolygonMode(GL_FRONT, GL_LINE);
		glVertex3f(-1.0f, -1.0f, -5.1f);
		glVertex3f( 0.0f, 1.0f, -5.1f);
		glVertex3f( 1.0f, -1.0f, -5.1f);
		glEnd();