Pretty lost with making a this small program.

Programming Questions

sidoney

Pretty lost with making a this small program.

in Programming Questions • 1 year ago

Basically I have to write a program where its divided into quaters and once the

program starts, a ball is displayed in the centre of one quadrant. The ball has a fixed

radius but a randomly set color. Then I can click the ball and drag it to a different quadrant. The ball is displayed when being dragged. The destination quadrant is the one where the mouse is released. The ball is displayed in the centre of the destination quadrant with a new randomly set color.

I understand what needs to be done on paper I just have no idea how to go about it. My methods for defining class Ball didnt work and ive been stuck ever since.

Thanks for any help.

Replies(5)

Chrisir

Re: Pretty lost with making a this small program.

1 year ago

that's great.

show your current Code.

Do you know the examples such as

http://www.processing.org/learning/basics/mousefunctions.html

?

sidoney

Re: Pretty lost with making a this small program.

1 year ago

Hey thanks for that link its great and has helped a lot.

This is what I have so far

float x;
float y;
int rad = 50;
boolean over = false;
boolean locked = false;
float difx = 0.0;
float dify = 0.0;
color c = color (random(0,255),random(0,255),random(0,255));
void setup()
{
size(400, 400);
x = width/4;
y = height/4;
}
void draw()
{
background(255);
// Test if the cursor is over the box
if (mouseX > x-rad && mouseX < x+rad &&
mouseY > y-rad && mouseY < y+rad) {
over = true;
if(!locked) {
noStroke();
fill(c);
}
} else {
noStroke();
fill(c);
over = false;
}
// Draw the circle
noStroke();
ellipse(x, y, rad*2, rad*2);
stroke(0);
line(width/2,0,width/2,height);
line(0,height/2,width,height/2);
}
void mousePressed() {
if(over) {
locked = true;
fill(c);
} else {
locked = false;
}
difx = mouseX-x;
dify = mouseY-y;
}
void mouseDragged() {
if(locked) {
x = mouseX-difx;
y = mouseY-dify;
}
}
void mouseReleased() {
locked = false;
}

I am stuck with making the circle default to the middle of the quadrant the mouse is in when released and also having the color change when i click the mouse.

Thanks for any help.

Chrisir

Re: Pretty lost with making a this small program.

1 year ago

hurray

My changes are only in mouseReleased()

float x;
float y;
int rad = 50;
boolean over = false;
boolean locked = false;
float difx = 0.0;
float dify = 0.0;
color c = color (random(0, 255), random(0, 255), random(0, 255));
void setup()
{
size(400, 400);
x = width/4;
y = height/4;
}
void draw()
{
background(255);
// Test if the cursor is over the box
if (mouseX > x-rad && mouseX < x+rad &&
mouseY > y-rad && mouseY < y+rad) {
over = true;
if (!locked) {
noStroke();
fill(c);
}
}
else {
noStroke();
fill(c);
over = false;
}
// Draw the circle
noStroke();
ellipse(x, y, rad*2, rad*2);
stroke(0);
line(width/2, 0, width/2, height);
line(0, height/2, width, height/2);
}
void mousePressed() {
if (over) {
locked = true;
fill(c);
}
else {
locked = false;
}
difx = mouseX-x;
dify = mouseY-y;
}
void mouseDragged() {
if (locked) {
x = mouseX-difx;
y = mouseY-dify;
}
}
void mouseReleased() {
locked = false;
c = color (random(0, 255), random(0, 255), random(0, 255));
if (mouseX>width/2) {
// right side
x=3* (width/4);
}
else {
// left side
x=1* (width/4);
}
if (mouseY>height/2) {
y=3* (height/4);
}
else {
y=1* (height/4);
}
}

sidoney

Re: Pretty lost with making a this small program.

1 year ago

Thank you so much for your help. I would have been so lost otherwise.

Chrisir

Re: Pretty lost with making a this small program.

1 year ago

you're welcome.

It's nice that you say thank you.

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