I have a 5x5 grid of squares. They are all the same color right now. I want to change the color of the square. First, i want to change one square. Then two squares, then 3 squares at one at a time randomly. Any help?
IDaivdJr wrote ...
2017/7/28
Squares, colors, and loops
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I suggest you start by reading this guide, which explains how to ask questions with more likelihood of getting a helpful response. It should give you an idea of how better to explain what you need.
public class Grid extends Actor
{
GreenfootImage img = new GreenfootImage (75, 75);
public void act()
{
//need help here
for(int i = 0; i < 1; i++){
for (int r = 0; r < 5; r++){
for (int t = 0; t < 5; t++){
//img.setColor(new Color(200, 24, 32));
img.drawRect(0, 0, 50, 50);
//img.fillRect(0, 0, 50, 50);
//setImage(img);
}
}
}
if (Greenfoot.mousePressed(this))
{
img.setColor(new Color(200, 24, 32)); // makes a square red
img.fillRect(0, 0, 50, 50);
img.setColor(java.awt.Color.black);
img.drawRect(0, 0, 50, 50);
setImage(img);
}
}
public Grid()
{
img.setColor(java.awt.Color.gray); // makes the squares gray
img.fillRect(0, 0, 50, 50);
img.setColor(java.awt.Color.black); // makes the outline of squares black
img.drawRect(0, 0, 50, 50);
setImage(img);
}
}
Try this class:
import greenfoot.*;
public class MyWorld extends World
{
private int level;
public MyWorld() {this(1);}
public MyWorld(int lvl)
{
super(500, 500, 1);
level = lvl;
int[][] grid = new int[5][5];
for (int i=0; i<grid.length; i++) for (int j=0; j<grid[i].length; j++)
{
grid[i][j] = 0;
}
for (int num=0; num<level; num++)
{
int fill = Greenfoot.getRandomNumber(grid.length*grid[0].length);
if (grid[fill/grid.length][fill%grid[0].length] == 0)
{
grid[fill/grid.length][fill%grid[0].length] = 1;
}
else num--;
}
GreenfootImage img = new GreenfootImage(getWidth(), getHeight());
for (int i=0; i<grid.length; i++) for (int j=0; j<grid[i].length; j++)
{
if (grid[i][j]==1) img.setColor(Color.RED);
else img.setColor(Color.BLACK);
img.fillRect(i*getWidth()/grid.length, j*getHeight()/grid[i].length, getWidth()/grid.length, getHeight()/grid[i].length);
}
setBackground(img);
}
}Okay, so i like the idea of this, but it doesn't set up a grid of squares 5x5. Like my code does. Below is my MyWorld source code. i hope you can make some changes to it.
private static final int HEIGHT = 50;
private static final int WIDTH = 50;
public MyWorld()
{
// Create a new world with 600x400 cells with a cell size of 1x1 pixels.
super(600, 400, 1);
for(int i = 0; i < 1; i++){
for (int r = 0; r < 5; r++){
for (int t = 0; t < 5; t++){
Grid g = new Grid();
addObject(g,75 + t*WIDTH,50+ i*HEIGHT*1+r*HEIGHT);
}
}
} The code I gave you basically creates a background image for the world in which one (or more for higher level input) squares are red and the rest red.
Your code creates 125 grids while a lot of them are at the same position (when sum of i and r is the same) or "outside the world" (=at the right edge when the sum of i and r is 7 or 8).
When i used your code, there was a black background with a red square. What i want is a grid of squares 5x.5. what i want right now is for just one square of the grid to be a different color. i want it to blink for like 5 seconds and then let the user click the square that was different.
Okay, so if you want to place 25 actors representing these squares, you will only need two for loops, not three. You can use the code I gave you and instead of creating and drawing the image in the end, you will create the grids and pass 0 or 1 to them to let them know if they should blink or not (for example).
I'm a little confused, can you put the code. And then how do i modify it in the Grid class?
import greenfoot.*;
public class MyWorld extends World
{
private int level;
public MyWorld() {this(1);}
public MyWorld(int lvl)
{
super(500, 500, 1);
level = lvl;
int[][] grid = new int[5][5];
for (int i=0; i<grid.length; i++) for (int j=0; j<grid[i].length; j++)
{
grid[i][j] = 0;
}
for (int num=0; num<level; num++)
{
int fill = Greenfoot.getRandomNumber(grid.length*grid[0].length);
if (grid[fill/grid.length][fill%grid[0].length] == 0)
{
grid[fill/5][fill%5] = 1;
}
else num--;
}
/*GreenfootImage img = new GreenfootImage(getWidth(), getHeight());
for (int i=0; i<grid.length; i++) for (int j=0; j<grid[i].length; j++)
{
if (grid[i][j]==1) img.setColor(Color.RED);
else img.setColor(Color.BLACK);
img.fillRect(i*getWidth()/grid.length, j*getHeight()/grid[i].length, getWidth()/grid.length, getHeight()/grid[i].length);
}
setBackground(img);*/
for (int i=0; i<grid.length; i++) for (int j=0; j<grid[i].length; j++)
{
addObject(new Grid(grid[i][j], getWidth()/grid.length, getHeight()/grid[i].length), i*getWidth()/grid.length+getWidth()/grid.length/2, j*getHeight()/grid[i].length+getHeight()/grid[i].length/2);
}
}
}
import greenfoot.*;
public class Grid extends Actor
{
private int flashing;
public Grid(int i, int wid, int hei)
{
flashing = i;
GreenfootImage img = new GreenfootImage(wid, hei);
img.setColor(Color.BLACK);
img.fill();
setImage(img);
}
public void act()
{
if (flashing>0 && flashing<5*50)
{
if (++flashing%25==0)
{
getImage().setColor(flashing%50==25?Color.RED:Color.BLACK);
getImage().fill();
}
}
}
}
It does. Well, looks I don't know what you mean with 5x5 grid of squares then =/
in greenfoot, there is only a black background and a red flashing square. i want the grid to be visible.
Like this?
import greenfoot.*;
public class Grid extends Actor
{
private int flashing;
public Grid(int i, int wid, int hei)
{
flashing = i;
GreenfootImage img = new GreenfootImage(wid, hei);
img.setColor(Color.GRAY);
img.fill();
img.setColor(Color.BLACK);
img.fillRect(1,1,img.getWidth()-2, img.getHeight()-2);
setImage(img);
}
public void act()
{
if (flashing>0 && flashing<5*50)
{
if (++flashing%25==0)
{
getImage().setColor(flashing%50==25?Color.RED:Color.BLACK);
getImage().fillRect(1,1,getImage().getWidth()-2, getImage().getHeight()-2);
}
}
}
}Line 23 of the MyWorld class has to be this:
as it was given before. Only changed it here and not in my code, so last time I copied the wrong one.
grid[fill/grid.length][fill%grid[0].length] = 1;
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