mob creeper;//creates the name for a new mob

void setup(){
  size(700,500,P3D);
  
  //IT IS IMPOSSIBLE TO RUN THIS CODE DIRECTLY FROM YOUR PROCESSING WINDOW
  //UNLESS YOU KNOW HOW TO CREATE A DATA FOLDER AND PUT AN IMAGE IN IT.
  //otherwise enjoy playing with this on the web :)
  creeper=new mob(loadImage("creeper.png"));//creates the mob called creeper
  
  noStroke();
}

void draw(){
  background(50,50,225);
  lights();//makes some lights
  
  fill(200,0,200);
  Platform(width/2,400,0, 700,100,creeper);//places a platform
  Pointer();//places a sphere on the platform
  
  fill(0,200,0);
  Creeper(350, 270, 100);// places a creeper
  
  // I was trying to get two creepers to run simultaiously but failed
 // Creeper(300 ,270 ,300);
 
 collider(width/2,1000,0, 7000,100,creeper);//places a collider
 
}


void Creeper(float X, float Y,float Z){// a function that puts together the mob
  pushMatrix();
  creeper.Entity(X,Y,Z,100,30);
  
  creeper.follow(2,mouseX,mouseY*2-height-200);
  
  creeper.isTextured(false);// change the false in here to true to get a very buggy texture applied
  translate(0,-16);
  creeper.Texture(16,16, 24,16);// sets texture cordinats
  creeper.Block(0,-20,0, 24,36,12);//body
  
  // head
  creeper.Texture(0,0, 32,16);
  creeper.Block(0,-12-36,0, 24,24,24);
  
  //legs
  creeper.Texture(0,16, 16,8);
  creeper.Block(6,6,12, 12,16,12);
  creeper.Block(-6,6,12, 12,16,12);
  creeper.Block(-6,6,-12, 12,16,12);
  creeper.Block(6,6,-12, 12,16,12);
  
  
  popMatrix();
}

//the class that makes the mobs for minecraft!
class mob {
  //make some vairables
  PImage mobSkin, Skin;
  
  PVector Pos;
  
  float textureX=0;
  float textureY=0;
  
  private float rot=0;
  private float rto=0;
  
  float fallAcell=0;
  
  private Boolean isTextured=true;
  
  mob(PImage skin){// declear variables
    Skin=skin;
    
    Pos = new PVector(0,0,0);
  }
  
  // supposed to creat a new position for the creeper so they won't over lap
  PVector Entity(float x, float y, float z, float mobWidth, float mobHeight){
    if(frameCount<5){
    Pos.x = x;
    Pos.y = y;
    Pos.z = z;
    } //else {
   //   x=Pos.x;
   //   y=Pos.y;
   //   z=Pos.z;
  //  }
      
    fallAcell++;
    Pos.y+=fallAcell;
    
    translate(Pos.x,Pos.y,Pos.z);
   // sphere(5);
    
    return Pos;
  }
  
  void follow(float speed, float XO, float YO){// follow a point, ohh so eciting!
    pushMatrix();
    if(XO <= Pos.x) rto = 180;
    else rto = 0;
    
    rot = -atan((Pos.z-YO)/(Pos.x-XO))+radians(rto);
    
    Pos.x += speed*cos(rot);
    Pos.z -= speed*sin(rot);
    
    popMatrix();
  }
  
  void isTextured(Boolean t){ //swicthes between the mob having an image and not
    isTextured =t;
  }// probably doesn't exsit in the actuall minecraft game. I mostly use it for debugging.
  
  void Texture(int x,int y, int Width, int Height){// sets texture coordanites
    
    mobSkin=Skin.get(x,y,Width,Height);
    
  }
  
  void Block(float x, float y, float z, float Xidth, float Yight, float Zepth){//this is the block function that creates blocks
    pushMatrix();
    
  
    rotateY(rot +radians(90));
      
    if(!isTextured){// if there isTexture equals false
      translate(x,y,z); //translates the box
      box(Xidth, Yight, Zepth);//this creates a cube, with width height and depth, thats it.
    }
    
    translate(-Pos.x,-Pos.y,-Pos.z);
    
    if(isTextured){// if isTextured is true, then run this incomplete texture map
    beginShape(QUADS);
    texture(mobSkin);
    vertex(Pos.x + x -Xidth/2, Pos.y + y -Yight/2, Pos.z + z +Zepth/2, mobSkin.width/4,mobSkin.height/2);
    vertex(Pos.x + x +Xidth/2, Pos.y + y -Yight/2, Pos.z + z +Zepth/2, mobSkin.width/2,mobSkin.height/2);
    vertex(Pos.x + x +Xidth/2, Pos.y + y +Yight/2, Pos.z + z +Zepth/2, mobSkin.width/2,mobSkin.height);
    vertex(Pos.x + x -Xidth/2, Pos.y + y +Yight/2, Pos.z + z +Zepth/2, mobSkin.width/4,mobSkin.height);
    
    vertex(Pos.x + x -Xidth/2, Pos.y + y -Yight/2, Pos.z + z -Zepth/2, mobSkin.width/4,mobSkin.height/2);
    vertex(Pos.x + x +Xidth/2, Pos.y + y -Yight/2, Pos.z + z -Zepth/2, mobSkin.width/2,mobSkin.height/2);
    vertex(Pos.x + x +Xidth/2, Pos.y + y +Yight/2, Pos.z + z -Zepth/2, mobSkin.width/2,mobSkin.height);
    vertex(Pos.x + x -Xidth/2, Pos.y + y +Yight/2, Pos.z + z -Zepth/2, mobSkin.width/4,mobSkin.height);
    endShape(CLOSE);
    }
    
    
    popMatrix();
  }
  
  
  float memx=0;//currently not important
  float memy=0;
  float memz=0;
  
  void endStep(){//not currently important
    memx=Pos.x;
    memy=Pos.y;
    memz=Pos.z;
    
  }
  
}

//this is a pointless comment

//the platform is not a class so we just need a void
void Platform(float x,float y, float z, float Xidth, float Yeight, mob Mob){
  pushMatrix();
  
  if(Mob.Pos.x >=x-Xidth/2 && Mob.Pos.x <=x+Xidth/2 && Mob.Pos.z >=z-Xidth/2 && Mob.Pos.z <=z+Xidth/2
  && Mob.Pos.y >=y-Yeight/2 && Mob.Pos.y <=y+Yeight/2){// if(XXXXXxxxX[ if a mob is touching the block, do this]XxmXs0)
    Mob.Pos.y = y-Yeight/2;//stand on top of ground
    Mob.fallAcell =0;//stopfalling
  }
  
  translate(x,y,z);//place the box to reprseant our platform
  box(Xidth, Yeight, Xidth);
  
  popMatrix();
}

void Pointer(){//makes a dot in space
  pushMatrix();
  translate(mouseX,350,mouseY*2-height-200);
  fill(0);
  sphere(10);
  
  popMatrix();
}

//like the platform function, only it moves the mob back up to the top.
void collider(float x,float y, float z, float Xidth, float Yeight, mob Mob){
  pushMatrix();
  
  if(Mob.Pos.x >=x-Xidth/2 && Mob.Pos.x <=x+Xidth/2 && Mob.Pos.z >=z-Xidth/2 && Mob.Pos.z <=z+Xidth/2
  && Mob.Pos.y >=y-Yeight/2 && Mob.Pos.y <=y+Yeight/2){// if(XXXXXxxxX[ if a mob is touching the block, do this]XxmXs0)
    Mob.Pos.y = 0;
    Mob.Pos.z = 100;
    Mob.Pos.x =width/2;
    Mob.fallAcell =0;
  }
  popMatrix();
}