1.  Node를 이용하여 그리는것이 아닌 opengl의 기본 api를 1차 작업하여 
   좀더 쉽게 기본 선,원, 사각형 및 부드러운 곡선을 그리는 방법을 알수 있습니다. 

Primitives.drawLine    == > 선그리기
Primitives.drawPoint   == > 원그리기
Primitives.drawPoints == > 점을 여러개 
Primitives.drawCircle  == > 원그리기
Primitives.drawPoly    == > 점연결하여 선그리기
Primitives.drawQuadBezier 4점 Bezier 

Primitives.drawCubicBezier 3점 Bezier 

public void draw(GL10 gl) {

   CCSize s = Director.sharedDirector().winSize();

   // draw a simple line

   // The default state is:

   // Line Width: 1

   // color: 255,255,255,255 (white, non-transparent)

   // Anti-Aliased

   gl.glEnable(GL10.GL_LINE_SMOOTH);

   Primitives.drawLine(gl, CCPoint.ccp(0, 0), CCPoint.ccp(s.width, s.height));

   // line: color, width, aliased

   // glLineWidth > 1 and GL_LINE_SMOOTH are not compatible

   // GL_SMOOTH_LINE_WIDTH_RANGE = (1,1) on iPhone

   gl.glDisable(GL10.GL_LINE_SMOOTH);

   gl.glLineWidth(5.0f);

   gl.glColor4f(1.0f, 0.0f, 0.0f, 1.0f);

   Primitives.drawLine(gl, CCPoint.ccp(0, s.height), CCPoint.ccp(s.width, 0));

   // TIP:

   // If you are going to use always the same color or width, you don't

   // need to call it before every draw

   //

   // Remember: OpenGL is a state-machine.

   // draw big point in the center

   gl.glPointSize(64);

   gl.glColor4f(0.0f, 0.0f, 1.0f, 0.5f);

   Primitives.drawPoint(gl, s.width / 2, s.height / 2);

   // draw 4 small points

   CCPoint points[] = {CCPoint.ccp(60, 60), CCPoint.ccp(70, 70), CCPoint.ccp(60, 70), CCPoint.ccp(70, 60)};

   gl.glPointSize(4);

   gl.glColor4f(0.0f, 1.0f, 1.0f, 1.0f);

   Primitives.drawPoints(gl, points, 4);

   // draw a green circle with 10 segments

   gl.glLineWidth(16);

   gl.glColor4f(0.0f, 1.0f, 0.0f, 1.0f);

   Primitives.drawCircle(gl, s.width / 2, s.height / 2, 100, 0, 10, false);

   // draw a green circle with 50 segments with line to center

   gl.glLineWidth(2);

   gl.glColor4f(0.0f, 1.0f, 1.0f, 1.0f);

   Primitives.drawCircle(gl, s.width / 2, s.height / 2, 50, CCMacros.CC_DEGREES_TO_RADIANS(90), 50, true);

   // open yellow poly

   gl.glColor4f(1.0f, 1.0f, 0.0f, 1.0f);

   gl.glLineWidth(10);

   CCPoint vertices[] = {CCPoint.ccp(0, 0), CCPoint.ccp(50, 50), CCPoint.ccp(100, 50), CCPoint.ccp(100, 100), CCPoint.ccp(50, 100)};

   Primitives.drawPoly(gl, vertices, 5, false);

   // closed purple poly

   gl.glColor4f(1.0f, 0.0f, 1.0f, 1.0f);

   gl.glLineWidth(2);

   CCPoint vertices2[] = {CCPoint.ccp(30, 130), CCPoint.ccp(30, 230), CCPoint.ccp(50, 200)};

   Primitives.drawPoly(gl, vertices2, 3, true);

   // draw quad bezier path

   Primitives.drawQuadBezier(gl, 0,s.height, s.width/2,s.height/2, s.width, s.height, 50);

   // draw cubic bezier path

   Primitives.drawCubicBezier(gl, s.width/2, s.height/2, s.width/2+30, s.height/2+50,

  s.width/2+60, s.height/2-50, s.width, s.height/2,100);

   // restore original values

   gl.glLineWidth(1);

   gl.glColor4f(1.0f, 1.0f, 1.0f, 1.0f);

   gl.glPointSize(1);

        }