Create a new Sketchbook and save it as Spot_Version0.0.
Enter the following code:
float x = 33.0;
float y = 50.0;
float diameter = 30.0;
void setup(){
size (100,100);
noStroke();
}
void draw(){
background(0);
ellipse(x, y, diameter, diameter);
}
Run the code. You should see a black window window with a white circle drawn in it.
Save your work.
Save your sketch as Spot_Version1.0.
Replace the existing code with this (But DON’T Run it yet… ) :
Spot sp;
void setup()
{
size (100,100);
noStroke();
sp = new Spot();
sp.xCoord = 33;
sp.yCoord = 50;
sp.diameter = 30;
}
void draw()
{
background(0);
ellipse(sp.xCoord, sp.yCoord, sp.diameter, sp.diameter);
}
Then using the New Tab button as below, create a new tab called Spot. (This will be the name of the new class)
Enter the following code in the new window.
class Spot
{
float xCoord, yCoord;
float diameter;
}
Run the code. You should see the same black window with a white circle drawn in it.
Save your work.
Save your sketch as Spot_Version2.0.
In the main tab, refactor the code so that it is the same as below:
Spot sp;
void setup()
{
size (100,100);
noStroke();
sp = new Spot(33, 50, 30);
}
void draw()
{
background(0);
ellipse(sp.xCoord, sp.yCoord, sp.diameter, sp.diameter);
}
Then go to the tab/class called Spot and refactor the code so that is has the following constructor:
class Spot
{
float xCoord, yCoord;
float diameter;
//Constructor
Spot(float xPos, float yPos, float diamtr)
{
xCoord = xPos;
yCoord = yPos;
diameter = diamtr;
}
}
Run the code. You should see the same black window with a white circle drawn in it.
Save your work.
Save your sketch as Spot_Version3.0.
In this step, we will make no changes in the main tab.
Go to the tab/class called Spot and refactor the code so that is also has the default constructor:
class Spot{
float xCoord, yCoord;
float diameter;
//Default Constructor
Spot(){
}
//Constructor
Spot(float xPos, float yPos, float diamtr){
xCoord = xPos;
yCoord = yPos;
diameter = diamtr;
}
}
Run the code. Once again, you should see the same black window with a white circle drawn in it.
Save and close your work.
