code: public void setAmbientLight(float r, float g, float b) {
          float ambient[] = { r, g, b, 255 };
          normalize(ambient);
          gl.glEnable(GL2.GL_LIGHTING);
          gl.glEnable(GL2.GL_LIGHT0);
          gl.glLightfv(GL2.GL_LIGHT0, GL2.GL_AMBIENT, ambient, 0);
      }
docs: Sets the RGB value of the ambientLight