Using random() in draw()

Programming Questions

devstation

in Programming Questions • 1 years ago

I have a challenge, to drop images from various positions in my Program, Im using random() to randomly generate numbers for the x- axis of my Image Location, the Problem is that since my method is called in the draw() function, it loops continuously generating random numbers each time. This makes the circle "shake" when it's droping. This is what i have to far

int z = 10;
int timedelay,time;
void dropBall() {
image(ball, generateRandom(), z);
z += speed * direction;//speed and direction are earlier declared variables
}
public float generateRandom(){
float nextX;
if (z > height + radius) { //height = height of the Screen, radius = radius of image
nextX = random(screenWidth);
}
else{
nextX = 100;
}
return nextX;
}
void setup(){
...
timeDelay = 1000;
time = millis();
}

void draw(){
background(204);
timer.showTimer(this,600,40);
stroke(0);//Bottom Stroke
...
if (millis() > time + timeDelay) {
dropBall();
if (z > height + radius) {
z = 0;
time = millis();
}
}
}

Replies(2)

jbum

Re: Using random() in draw()

1 years ago

Two suggestions.

1) I posted a similar sketch on my blog some weeks back. It shows the basic idea, which involves creating a class to represent the falling image, so that each image can store it's info (such as its position, velocity, etc.)

http://joyofprocessing.com/blog/2011/10/falling-cats/

2) If you would prefer we correct your existing code, please post more of it. Since the problem involves your draw() routine, we'll need to see it.

devstation

Re: Using random() in draw()

1 years ago

Thank You for the reply, While i go through your Code, I made some additions like you suggested to my Code above.

Edit: Got it Working looking through jbum's Code

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