Processing Forum

How to get one sensor value from the arduino into processing? (

[2 Replies]
- 15-May-2013 02:59 AM
- Forum: Integration and Hardware
Hi,

In the graph tutorial on the arduino website under "communications" where I interface processing with arduino, I get the data from the arduino with the below line of code:

MyPort = new Serial(this, Serial.list()[1], 9600);

If I send one sensor signal from the arduino to processing, how do I extract that one sensor value and make it a variable that I can put into an if statement?

Thanks,

Ana

sending a variable from arduino to processing

[1 Reply]
- 14-May-2013 12:51 AM
- Forum: Integration and Hardware
Hi,

I looked at the graph tutorial that shows how to send raw sensor data from the arduino to procesing. What is the syntax when I want to not send raw sensor data but a variable from the arduino to processing?

Should the code look like this on the arduino side?

Serial.println(analogRead(variable));

and like this on the processing side?

myPort = new Serial(variable, 9600);

and what about the below part of the processing code? Is that necessary if I don't want to draw a graph but just use the variable to for example change the color of a square?

void serialEvent (Serial myPort) {
// get the ASCII string:
String inString = myPort.readStringUntil('\n');

if (inString != null) {
// trim off any whitespace:
inString = trim(inString);
// convert to an int and map to the screen height:
float inByte = float(inString);
inByte = map(inByte, 0, 1023, 0, height);

Multiple points along one bezier curve

[1 Reply]
- 06-May-2013 12:29 PM
- Forum: General Discussion
How do I make multiple points along one bezier curve, where I can attach something to these points?

----O-----O-------

With a line I can just make multiple lines and then connection points between the lines, but what about a bezier curve?

Thanks for your help,

Ana

How do I make a bezier curve look like it grows?

[2 Replies]
- 06-May-2013 12:27 PM
- Forum: General Discussion
Hi,

How do I make a bezier curve look like it grows?

It is fairly easy with a line, because I just move the two end points, but a bezier curve is rather difficult ...

Ana

show a processing sketch inside a website

[2 Replies]
- 23-Apr-2013 02:05 PM
- Forum: Integration and Hardware
Hi,

How do I show a processing sketch inside a website? Any code example how to integrate it?

Best,

Ana

How to integrate an if sentence with a function?

[2 Replies]
- 17-Apr-2013 12:26 AM
- Forum: Programming Questions
In the below code, how do I make the circle change color when the mouseX is < 50? How do I use an if sentence inside a function?

void setup() {

size(300, 300);

noStroke();

smooth();

}

void draw() {

background(0);

circle(mouseX, mouseY, 30, 255);

}

void circle(int x, int y, int size, int b) {

fill(0, 0, b);

ellipse(x, y, size, size);

// How do I make the circle change color when the mouseX is < 50?

if(mouseX < 50) {

b = 50;

} else {

b = 255;

}

}

Making a whole shape with 2 bezierVertex curves

[3 Replies]
- 16-Apr-2013 02:04 PM
- Forum: Programming Questions
Hi,

With the below code, how do I relate the curve variables to the positions of the two control points, so that I avoid that the shape turns into a cross (breaks in the middle)?

void setup() {

size(300, 300);

noStroke();

smooth();

}

void draw() {

// fill(0, 12); // Make the shape blur onto the screen.

background(0); // Animate without blur

blob(mouseX, mouseY, 150, 150);

}



void blob(int p1X, int p1Y, int p2X, int p2Y) { // p1X = control point x axis ...

pushMatrix();

translate(0, 0); // move the position of the entire shape

// scale(size); // scale to size

beginShape(); // draw the blob

vertex(p1X, p1Y); // Set the first anchor point and let it be the same as the first bezier

bezierVertex(80, 0, 80, 75, p2X, p2Y);

bezierVertex(40, p1X*2, 60, 25, p1X, p1Y);

endShape();

popMatrix();





}

How do I animate something in processing

[2 Replies]
- 11-Apr-2013 07:32 AM
- Forum: Programming Questions
Hi,

I'd like to use some example code (see below) to ask the following question:

How do I make the vine grow, so that one leaf at a time appears every second?

How do I make the center line of the vine grow from the bottom of the screen to the top of the screen?

Example code:

void setup() {

size(100, 100);

smooth();

noStroke();

noLoop();

}

void draw() {

vine(33, 9, 16);

}

// Function vine has three variables:

// X-coordinate,

// Total number of leaves,

// Width of the leaf in pixels

void vine(int x, int numLeaves, int leafSize) {

stroke(255);

line(x, 0, x, height); // draw the vine that holds the leaves

noStroke();

int gap = height / numLeaves; // the gap between the leaves is the screen height divided by number of leaves.

int direction = 1; // so that the leaves can be placed on both sides?

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

int r = int(random(gap));

leaf(x, gap*i + r, leafSize, direction);

direction = -direction; // if this is not active, there will only be leaves on one side.

}

}

// the actial leaf drawn. The leaves will be multiplied in the vine function.

void leaf(int x, int y, int size, int dir) {

pushMatrix();

translate(x, y); // move the position

scale(size); // scale to size

beginShape(); // draw the leaf

vertex(1.0*dir, -0.7);

bezierVertex(1.0*dir, -0.7, 0.4*dir, -1.0, 0.0, 0.0);

bezierVertex(0.0, 0.0, 1.0*dir, 0.4, 1.0*dir, -0.7);

endShape();

popMatrix();

}

Analogue input from the arduino into processing

[1 Reply]
- 07-Mar-2013 04:16 AM
- Forum: Integration and Hardware
Hi all,

How do I get sensor data from the arduino into processing?

In other words, I need to get the analogue input from the arduino into processing and control a variable in processing.

What is the most simple arduino code, and what is the most simple processing code?

Thank you for your help!

Ana

processing and ipad - beginner's guide

[6 Replies]
- 22-Dec-2011 05:40 PM
- Forum: General Discussion
Hi,

I am new to ipad development _and_ processing as well, but I am interested in learning how to make processing applications work on an ipad. I would therefore like to make a step-by-step instruction how to do the following (see below this message).

Thanks

anna

ps. I have a mac computer, by the way :-)

1) What to download? Processing of course, but what else?

- is this the one I need to download?

http://processingjs.org/download

2) How to make sure that the processing editor sees the ipad commands - do I need to place certain items in certain folders when I instal processing and the ipad add on to processing?

3) Can I simulate how the application works in the processing play window?

4) How do I "export" my aplication to an ipad, so that I can see how the finished application actually works?

... so far I went to this link: http://luckybite.com/iprocessing/

and copy pasted the code into the regular processing editor and got an error message: "Cannot find anything named "gestureRotation"

- is this because I don't have the iprocessing files positioned in the right folder on my computer, or???

Activity Trend