Storing variables of mouseX / mouseY?

Programming Questions

cipherr

Storing variables of mouseX / mouseY?

in Programming Questions • 10 months ago

Hello,

I've been working on a project and have been seriously stumped for the past.. many hours. The first phase of what I'm working on is making it so when you click, it creates an ellipse, and the ellipse slowly starts to move towards the center. Everything except the movement aspect is working fine, but its that very movement that is driving me crazy. I've tried a ton of radically different things, but I'll post the simplest version that otherwise works. This is the [relevant] code:

void draw() {
orbMove();
for (int i = 0; i < magnoOrbSet.length; i++) {
    if (mousePressed) {
      orbX = mouseX;
      orbY = mouseY;
      stroke(71, 167, 128);
      line(mouseX, mouseY, width/2, height/2);
      noStroke();
      magnoOrbSet[i] = new magnoOrb(orbX, orbY, 20, 20);
      magnoOrbSet[i].display();      //all this does is display an ellipse
    }
}
}

(The actual function that causes any movement is left out of this, but is called at the top of draw(), let me know if you'd like to see it). So what I think I basically need to do is create a new variable (set to a number, not to the mouse) for every ellipse that is created. And however its done, they all need to be easily altered in mass (since they're all slowly moving towards the center.

Does anybody have any ideas? I'm not the best programmer [yet] and I've been stuck on this for waay too long. Any input would be great.

Thanks

edit:

I figure I should just show the code for movement too

void orbMove() {
if (orbX<width/2) {
orbX -= 1;
}
else {
orbX +=1;
}
if (orbY<height/2) {
orbY -=1;
}
else {
orbY +=1;
}
}

Replies(3)

sachaamm

Re: Storing variables of mouseX / mouseY?

10 months ago

in your draw() method don't write :

" if (mousePressed) {
orbX = mouseX;
orbY = mouseY;

u can't use a simply int use an int array : int[]

on the top of your sketch declare your int[] (before setup() ) :

int[] orbX;

int[] orbY;

int currentNombre = 0;

in setup() initialize your int arrays orbX and orbY:

void setup(){ orbX = new int[numbers];

//replace numbers by a int you choose :

orbX=new int[15] : so orbX can lock 15 values;

an array is simply an object where you stock values:

then , in draw():

void draw(){

for(int i = 0; i<currentNombre;i++){

ellipse(orbX[i],orbY[i],50,50);

//it means you use current Nombre to control the i loop;

// and for this you need to use mousePressed control

if(mousePressed){ orbX[currentNombre] = mouseX;

orbY[currentNombre] = mouseY;

currentNombre +=1; // to continue the loop

}

then you can pick a value in your int array : orbX[] orbY[] ; orbX[1] is the first orbX value locked orbX[2] is the second orbX[3] the third etc..

asimes

Re: Storing variables of mouseX / mouseY?

10 months ago

The code below has some easing on the movement of the orb to avoid perfectly 45 degree or 90 degree angle movements. Instead of randomizing on mouse clicks I just randomize when the orb is too close to the center.

float orbX, orbY;
void setup() {
size(600, 600);
fill(255, 0, 0);
smooth();
orbX = width/2;
orbY = height/2;
}
void draw() {
background(255);
ellipse(orbX, orbY, 10, 10);
// Move in the direction of the center
if (orbX < width/2) orbX += (width/2-orbX)/10;
if (orbX > width/2) orbX -= (orbX-width/2)/10;
if (orbY < height/2) orbY += (height/2-orbY)/10;
if (orbY > height/2) orbY -= (orbY-height/2)/10;
// Simulate random mouse clicks when too close to the center
if (sqrt(sq(orbX-width/2)+sq(orbY-height/2)) < 1) {
orbX = random(width);
orbY = random(height);
}
}

cipherr

Re: Storing variables of mouseX / mouseY?

10 months ago

@ sachaamm - Yup, that got it! I had actually tried the array thing in an earlier build, but aside from storing things in arrays, my code was very similar to what I had posted above, and thus it still did not work.

@ asimes - Yeah that does look a lot better, I'm going to try and apply that to the full program I have, thanks for the tips

Thank you very much for the help.

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