// Digital Material Cube 003
// FabLab Japan
// Hiroya Tanaka

// Import
//import processing.opengl.*;
//import javax.media.opengl.*;  
import controlP5.*;

// Array 
int[] arrays = new int[48*48*48];

// Field 
int FIELD_SIZE = 50;
int FIELD_STEP =  10;

// Camera 
float expo = 1;
float rotx, roty;
float rate = 0.01;

// Resolution of Box
public int resolution = 16;
public int transparency = 0;
float ratio = 0;

// ControlP5
ControlP5 controlP5;


// Text
PFont  font;  
long   time;  



void setup() {
  size(640, 480, P3D);    

  controlP5 = new ControlP5(this);  

  controlP5.addSlider("resolution",1,48,10,40,200,20);
  controlP5.addSlider("transparency",0,100,10,65,200,20);
}


void draw() {

  background(0);
//  PGraphicsOpenGL pgl = (PGraphicsOpenGL)g;  
  
  // Lighting
    ambientLight(150, 150, 150);
    directionalLight(255,255,255,-1,0,0);
    pointLight(160, 160, 160, mouseX, mouseY, 200);
    spotLight(100, 100, 100, mouseX, mouseY, 200, 0, 0, -1, PI, 2);
    
  // Camera
  rotx = rotx + (mouseY - pmouseY) * rate;
  roty = roty + (mouseX - pmouseX) * rate;
  
  //Text
  font = createFont("Meiryo", 12);
  textFont(font);
  fill(255,255,255);
  text("03 Visual Transparency (Random)", 10, 25); 
  
 // Zoom In and Out
if (keyPressed && keyCode==UP) { expo = expo + 0.01; }
if (keyPressed && keyCode==DOWN) { expo = expo - 0.01; }

for (int jj=0; jj<resolution*resolution*resolution; jj++) { arrays[jj]=0; }
// Random Fill out Generation 
int count = 0;
while ( count < resolution*resolution*resolution * transparency/100 ){
     int r= int(random(resolution*resolution*resolution));
     if (arrays[r]==0) { arrays[r]=1; count++; } 
}

  // フレームの描画
  pushStyle();
  translate(320,240,200);
  rotateX(rotx); rotateY(roty);scale(expo);
  
  stroke(255, 255, 255, 30);  
  FIELD_STEP = FIELD_SIZE*2/resolution;
  
  for(int k = 1; k<=resolution; k = k + 1){
    for(int j = 1; j<=resolution; j = j + 1){
       for(int i = 1; i<=resolution; i = i + 1){
       
          // x
          float x = -FIELD_SIZE + FIELD_STEP*(i - 1);
          float xx = -FIELD_SIZE + FIELD_STEP*(i);
          float realx = (x + xx)/2; 
          // y
          float y = -FIELD_SIZE + FIELD_STEP*(j - 1);
          float yy = -FIELD_SIZE + FIELD_STEP*(j);
          float realy = (y + yy)/2; 
          // z
          float z = -FIELD_SIZE + FIELD_STEP*(k - 1);
          float zz = -FIELD_SIZE + FIELD_STEP*(k);
          float realz = (z + zz)/2; 
        
        pushMatrix(); 
        translate(realx,realy,realz);
        noFill();
        box(FIELD_STEP ,FIELD_STEP ,FIELD_STEP );
        popMatrix();
       }
    }
  }

  popStyle();
  
  // ボクセルの描画
  pushStyle();
  noStroke();
  noFill();

  int l = 0;
  
  FIELD_STEP = FIELD_SIZE*2/resolution;
 
  for(int k = 1; k<=resolution; k = k + 1){
    for(int j = 1; j<=resolution; j = j + 1){
       for(int i = 1; i<=resolution; i = i + 1){
       
          //x
          float x = -FIELD_SIZE + FIELD_STEP*(i - 1);
          float xx = -FIELD_SIZE + FIELD_STEP*(i);
          float realx = (x + xx)/2; 
          //y
          float y = -FIELD_SIZE + FIELD_STEP*(j - 1);
          float yy = -FIELD_SIZE + FIELD_STEP*(j);
          float realy = (y + yy)/2; 
          //z
          float z = -FIELD_SIZE + FIELD_STEP*(k - 1);
          float zz = -FIELD_SIZE + FIELD_STEP*(k);
          float realz = (z + zz)/2; 
        
         pushMatrix();
         translate(realx,realy,realz); 
         
         if ( arrays[l] == 1 ) { 
         fill(200,200,200); 
       
         } else { 
          noFill(); 
         }
         l++;

         
         box(FIELD_STEP,FIELD_STEP,FIELD_STEP);
         popMatrix();
       }
    }
  }
  popStyle();
  
  // α合成を有効にする
//  GL gl = pgl.beginGL();
//  gl.glEnable(GL.GL_BLEND);
//  gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);  
//  gl.glDisable(GL.GL_DEPTH_TEST);
//  pgl.endGL();
  

    // GUI コンポーネント描画のための設定
  camera();
//  gl = pgl.beginGL();
//  gl.glDisable(GL.GL_DEPTH_TEST);  // 深度テストを無効化
//  gl.glEnable(GL.GL_BLEND);
//  gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);  
//  pgl.endGL();
}