case POINTS: return GL_POINTS;
case LINES: return GL_LINES;
case LINE_STRIP: return GL_LINE_STRIP;
case POINTS: return GL_POINTS;
case LINES: return GL_LINES;
case LINE_STRIP: return GL_LINE_STRIP;
case TRIANGLES: return GL_TRIANGLES;
case TRIANGLE_STRIP: return GL_TRIANGLE_STRIP;
case TRIANGLE_FAN: return GL_TRIANGLE_FAN;
case TRIANGLES: return GL_TRIANGLES;
case TRIANGLE_STRIP: return GL_TRIANGLE_STRIP;
case TRIANGLE_FAN: return GL_TRIANGLE_FAN;