/**
 * this demo shows how to the GLSL shadermanager.
 */


import gestalt.Gestalt;
import gestalt.candidates.glsl.ShaderManager;
import gestalt.candidates.glsl.ShaderProgram;
import gestalt.p5.GestaltPlugIn;

import processing.opengl.PGraphicsOpenGL;


GestaltPlugIn gestalt;

ShaderManager _myShaderManager;

ShaderProgram _myShaderProgram;

float[][] _mySpherePosition;

float _myRotation;

void setup() {
  /* setup p5 */
  size(640, 480, OPENGL);
  sphereDetail(4);
  noStroke();

  gestalt = new GestaltPlugIn(this);

  /* setup shader */
  _myShaderManager = gestalt.drawablefactory().extensions().shadermanager();
  _myShaderManager.init( ( (PGraphicsOpenGL) g).gl, ( (PGraphicsOpenGL) g).glu);

  _myShaderProgram = _myShaderManager.createShaderProgram();
  _myShaderManager.attachVertexShader(_myShaderProgram, loadStrings("toon.vsh"));
  _myShaderManager.attachFragmentShader(_myShaderProgram, loadStrings("toon.fsh"));
  gestalt.bin(Gestalt.BIN_FRAME_SETUP).add(_myShaderManager);

  _myShaderManager.enable(_myShaderProgram);
  _myShaderManager.setUniform(_myShaderProgram, "thresholds", new float[] {
    0.1f, 0.2f, 0.5f, 0.95f    }
  );

  /* create sphere positions */
  _mySpherePosition = new float[1000][4];
  for (int i = 0; i < _mySpherePosition.length; i++) {
    _mySpherePosition[i][0] = random(width);
    _mySpherePosition[i][1] = random(height);
    _mySpherePosition[i][2] = random( -10, 10);
    _mySpherePosition[i][3] = random(10, 20);
  }
}


void draw() {
  background(64, 64, 64);

  float myX = (mouseX / (float) width - 0.5f) * 2.0f;
  float myY = (mouseY / (float) height - 0.5f) * 2.0f;
  directionalLight(255, 255, 255, myX, myY, 1);

  translate(width / 2, height / 2);
  _myRotation += 0.03f;
  rotateX(sin(_myRotation) * 0.1f);
  rotateY(cos(_myRotation * 0.65f) * 0.1f);
  translate(width / -2, height / -2);

  for (int i = 0; i < _mySpherePosition.length; i++) {
    pushMatrix();
    translate(_mySpherePosition[i][0], _mySpherePosition[i][1], _mySpherePosition[i][2]);
    sphere(_mySpherePosition[i][3]);
    popMatrix();
  }
}