Processing 1.0 - Processing Discourse - project due tomorrow!!online waiting for debug!

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project due tomorrow!!online waiting for debug! (Read 577 times)

yoyosky

project due tomorrow!!online waiting for debug!
Apr 15^th, 2010, 6:37pm

Hey guys~~i have some problems on my program. I was trying to get the readings from the arduino and then using that number as a index to load image from my computer. but i keep getting the "ArrayIndexOutOfBoundsException: 111" report.....
my project is due tomorrow...really appreciate if you could help!!!
code:

import processing.serial.*;

Serial myPort;
int val;
int i;
PImage[] images = new PImage[i];

void setup()
{
size(400, 400);
String portName = Serial.list()[0];
myPort = new Serial(this, portName, 9600);

images[111] = loadImage("111.jpg");
. // i just omit the other 68 commands between these two
.
.//
images[444] = loadImage("444.jpg");
}

void draw()
{
if ( myPort.available() > 0) {
val = myPort.read();
}
i = val;
image(images[i], 0, 0);
}

yoyosky

Re: project due tomorrow!!online waiting for debug!
Reply #1 - Apr 15^th, 2010, 7:03pm

part of my arduino code:
void loop() {
pulseCount = 0;
while(digitalRead(pulse_in) == 0) {}
while(digitalRead(pulse_in) == 1) {

pulseCount++; }
val1 = (pulseCount * .0000053) * 2;
val1 = 1/val1;
rval1 = val1;
if (rval1 <= 300)
{
inde1 = 1;
}
else if (rval1 > 300 && rval1 <= 1200)
{
inde1 = 2;
}
else if (rval1 > 1200 && rval1 <= 3000)
{
inde1 = 3;
}
else
{
inde1 = 4;
}
delay(8000);

pulseCount = 0;
while(digitalRead(pulse_in) == 0) {}
while(digitalRead(pulse_in) == 1) {
pulseCount++; } // loop while Hi
val2 = (pulseCount * .0000053) * 2;
val2 = 1/val2; // calculate frequency
rval2 = val2;
if (rval2 <= 300)
{
inde2 = 1;
}
else if (rval2 > 300 && rval2 <= 1200)
{
inde2 = 2;
}
else if (rval2 > 1200 && rval2 <= 3000)
{
inde2 = 3;
}
else
{
inde2 = 4;
}
delay(8000);

pulseCount = 0;
while(digitalRead(pulse_in) == 0) {}
while(digitalRead(pulse_in) == 1) {
pulseCount++; } // loop while Hi
val3 = (pulseCount * .0000053) * 2;
val3 = 1/val3;
rval3 = val3;
if (rval3 <= 300)
{
inde3 = 1;
}
else if (rval3 > 300 && rval3 <= 1200)
{
inde3 = 2;
}
else if (rval3 > 1200 && rval3 <= 3000)
{
inde3 = 3;
}
else
{
inde3 = 4;
}
delay(8000);

inde8 = (inde1 * 100) + (inde2 * 10) + inde3;

Serial.print(inde8);
delay(8000);

}

PhiLho

Re: project due tomorrow!!online waiting for debug!
Reply #2 - Apr 16^th, 2010, 12:18am

Quote:

Code:

int i;
PImage[] images = new PImage[i];

i is zero at this point, so you create an empty array. So images[111] = loadImage("111.jpg"); is making the error you see.
Your method can be argued (ie. there are better ways) but if you need to go fast and dirty, just hard-code the new PImage[MAX] with MAX being the higher number you use plus one.

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