A graphic Stack

How does this looks like:

import remixlab.bias.event.*;

import remixlab.bias.event.shortcut.*;

import remixlab.bias.agent.profile.*;

import remixlab.bias.agent.*;

import remixlab.dandelion.agent.*;

import remixlab.proscene.*;

import remixlab.dandelion.core.*;

import remixlab.dandelion.constraint.*;

import remixlab.fpstiming.*;

import remixlab.util.*;

import remixlab.dandelion.geom.*;

import remixlab.bias.core.*;

Scene scene;

int[] a; //array for stack

int STACK_SIZE; // size of array

int stack_top;

int i=0;

int popped=0;

int position;

PFont f; // Declare PFont variable

void setup(){

scene = new Scene(this); // CAMERA

scene.setAxesVisualHint(false); // hide axis

scene.setGridVisualHint(false); // hide grid

size(1000,800,P3D);

f = createFont("Arial",16,true); // Create Font

STACK_SIZE = 8;

a = new int[STACK_SIZE];

stack_top = 0; // The stack is empty

}

void draw(){

background(0);

textFont(f,8);

drawColors(); // The opstions for the user

drawStack(a); //Draw every element that is pushed

drawPopping(); //Draw the element that is popped

fill(255);

text("For popping, \n press number 6 \n in your keyborad",0,-60,0); //Instructions

}

void drawColors(){ //Options of colors

textFont(f,16);

pushMatrix();

fill(255);

text("1", -100, -35,0);

noStroke();

fill(52, 245, 54);

translate(-80,-40,0);

sphere(10);

popMatrix();

pushMatrix();

fill(255);

text("2", -100, -15,0);

noStroke();

fill(0, 76, 255);

translate(-80,-20,0);

sphere(10);

popMatrix();

pushMatrix();

fill(255);

text("3", -100, 5,0);

noStroke();

fill(#FF9933);

translate(-80,0,0);

sphere(10);

popMatrix();

pushMatrix();

fill(255);

text("4", -100, 25,0);

noStroke();

fill(204, 255, 0);

translate(-80,20,0);

sphere(10);

popMatrix();

pushMatrix();

fill(255);

text("5", -100, 45,0);

noStroke();

fill(179, 0, 255);

translate(-80,40,0);

sphere(10);

popMatrix();

}

int push(int number, int a[]){ //push function

if(stack_top < STACK_SIZE){ // Check for overflow

a[stack_top] = number; // Save the element in the array

println(stack_top);

println(a[stack_top]);

stack_top = stack_top + 1;//next position in stack

println("PUSH");

println(stack_top);

return 0; // success

}

else{

text("NOT POSSIBLE",0,10,0);

println("ERROR");

return -1; // error

}

}

void drawStack(int a[]){ //draw the elements inside the array

noFill();

for (int j=0; j<STACK_SIZE;j++){

switch(a[j]){

case 0:

fill(0);

break;

case 1:

fill(52, 245, 54);

break;

case 2:

fill(0, 76, 255);

break;

case 3:

fill(#FF9933);

break;

case 4:

fill(204, 255, 0);

break;

case 5:

fill(179, 0, 255);

break;

default:

break;

}

pushMatrix();

translate(-20,60-(j*20),0);

noStroke();

sphere(10);

fill(0);

popMatrix();

}

}

int pop(int a[]){ // Returns -1 if the stack is empty

if(stack_top > 0){

popped = a[stack_top-1]; //Save the element that will be popped

a[stack_top-1]=0; //Reset the stack top

stack_top = stack_top - 1;

println("POP");

println(popped);

println(stack_top);

return popped;

}

else{

println("ERROR");

text("NOT POSSIBLE",0,10,0);

return -1; // error

}

}

void drawPopping(){ //Draw the element that is popped

switch(popped){

case 0:

fill(0);

break;

case 1:

fill(52, 245, 54);

break;

case 2:

fill(0, 76, 255);

break;

case 3:

fill(#FF9933);

break;

case 4:

fill(204, 255, 0);

break;

case 5:

fill(179, 0, 255);

break;

default:

break;

}

pushMatrix();

translate(40,40,0);

noStroke();

sphere(10);

popMatrix();

}

void keyReleased(){ // Events of the keys being used

println("GotTheKey");

switch(key){

case '1':

push(1,a);

break;

case '2':

push(2,a);

break;

case '3':

push(3,a);

break;

case '4':

push(4,a);

break;

case '5':

push(5,a);

break;

case '6':

println("POP will enter");

pop(a);

break;

}

}

#stack