import processing.opengl.PGraphicsOpenGL;

import javax.media.opengl.GL;

import javax.media.opengl.glu.GLU;

import javax.media.opengl.glu.GLUquadric;

import com.sun.opengl.util.texture.Texture;

import com.sun.opengl.util.texture.TextureIO;

import peasy.PeasyCam;  //peasy camera control


void setup() {

 
  size(screenWidth, screenHeight, OPENGL );
  frameRate(24);
  planet.draw();
 
}
class Planet{

  PGraphicsOpenGL pgl;

  GL gl;

  GLU glu;

  GLUquadric mysphere;

  Texture earth;

  PeasyCam cam;

  float rotateearth = 0;
 
  float r;

  pgl = (PGraphicsOpenGL) g; 

  gl = pgl.gl; 

  glu = pgl.glu;

  mysphere = glu.gluNewQuadric();

  glu.gluQuadricDrawStyle(mysphere, glu.GLU_FILL);

  glu.gluQuadricNormals(mysphere, glu.GLU_NONE);

  glu.gluQuadricTexture(mysphere, true);

  float fov = PI/3.0;

  float cameraZ = (height/2.0) / tan(fov/2.0);

  Planet(String fileName, float radius){
  
   
  perspective(fov, float(width)/float(height), cameraZ/10.0, cameraZ*32.0);

  cam = new PeasyCam(this, width);

  cam.setResetOnDoubleClick(false);

  cam.setMinimumDistance(width/14);

  cam.setMaximumDistance(width*10);

  cam.rotateZ(radians(-90));

  cam.rotateX(radians(105));

  r = radius

  try {   

    earth = TextureIO.newTexture(new File(dataPath(println fileName)), true);

      /*  http://apod.nasa.gov/apod/image/0203/earthtruecolor_nasa_big.jpg */

  } 

  catch (IOException e) {       

    javax.swing.JOptionPane.showMessageDialog(this, e);

  }

}

void draw() {

  background(0);

  pgl.beginGL();

  gl.glPushMatrix();

  gl.glRotatef(degrees(rotateearth),0.0,0.0,1.0);

  gl.glColor3f(1,1,1);

  earth.enable();

  earth.bind();

  glu.gluSphere(mysphere, r/PI, 40, 40);

  earth.disable();

  gl.glPopMatrix();

  pgl.endGL();

  if (rotateearth < 360) {

    rotateearth = rotateearth + .0005;

  }

  else {

    rotateearth = 0;

  }

  println(frameRate);

}




Anyone that can enlight me the problem to this code?
was there a problem placing the openGL varibles inside the class?
and furthermore, for the filename part, is it do-able in this current method?
whereby I use a string to get the input(eg. venus.jpg) and place it under the
earth = TextureIO.newTexture(new File(dataPath(println fileName)) part.

Thanks in advance for any replies~!