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How to add a Sound Trigger?

[1 Reply]
- 04-Jan-2012 07:27 AM
- Forum: Programming Questions
Hi everyone,

Im new to Processing, and am currently working on a project in which I have collected a large amount of motion data from the traffic outside my window. I currently have a sketch that reads in this data, and plays it back. All the motion is represented by various sized rectangles. Once a rectangle passes through the centre point of the screen, it changes to a shade of yellow to show it has passed through this point;

What I would like to do is add sound to my sketch, so that once a rectangle passes through the centre point, a simple tone is triggered and played. I would like this to happen every time a new rectangle passes through this point, in order to create a sort of abstract piece of music. Any help would be greatly appreciated;

The Sketch

String line;

String type;

int id;

int x;

int y;

int w;

int h;

int year;

int month;

int day;

int hour;

int minute;

int second;

int millis;

BufferedReader reader;

void setup(){

size(640,480);

frameRate(60);

reader = createReader("Blobs-2011-11-29-17-42-34.txt");

}

void parseData (String datastr){

type = null;

id = 0;

x = 0;

y = 0;

w = 0;

h = 0;

year = 0;

month = 0;

day = 0;

hour = 0;

minute = 0;

second = 0;

millis = 0;

// check there is some data to parse

if (datastr != null){

String[] list = split(datastr, ',');

type = list[0]; // find out the first item in the line

// parse the blob data

if (type.equals("Blob") && list.length == 13){

id = int(list[1]);

x = int(list[2]);

y = int(list[3]);

w = int(list[4]);

h = int(list[5]);

year = int(list[6]);

month = int(list[7]);

day = int(list[8]);

hour = int(list[9]);

minute = int(list[10]);

second = int(list[11]);

millis = int(list[12]);

} else if (type.equals("Blob") && list.length != 13){

println("invalid blob list length");

}

}

}

void readFromFile(int skipLines){

try {

int skip = skipLines;

while (skip>0){

line = reader.readLine();

skip--;

}



} catch (IOException e) {

e.printStackTrace();

line = null;

}



if (line != null){

parseData(line);

}

}

void draw(){







fill(150,150,150,50);

rect(0, 0, width, height);



boolean newFrame = false;

while (!newFrame){

readFromFile(5); // pass a number to skip lines in the file

if (type.equals("Blob")){





// do other code here based on x,y,w,h



// Colour the rects that are inbetween 200-300 vertical screen position

if (y >200 && y < 300){

fill(255,255,0);

} else {

fill(255,255,255);

}



// draw all rects smaller than 100px

if (w<100 && h<100){

rect(x, y, w, h);

}



}

// Clear the screen each frame (or decrement the frame refresh counter)

if (type.equals("Frame")){

newFrame = true;



}

}









}

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