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### Topic: Convert Processing code to Arduino??? (Read 999 times)previous topic - next topic

#### bonobono

##### Nov 15, 2012, 03:41 pm
Hi.

I want to convert the code (below) from Processing into Arduino but I am getting errors with the syntax, basically what I want to do is to get a vibration motor to start, reach maximum speed and slow down again in the shape of a curve. I have it working in processing (using the Arduino Lib) but I would like to have it working also in the Arduino IDE as I want to disconnect the arduino from the computer...any help will be appreciated ...thanks in advance...

Code: [Select]

int xspacing = 32;   // How far apart should each horizontal location be spaced
int w;              // Width of entire wave
float theta = 0.0;  // Start angle at 0
float dx;  // Value for incrementing X, a function of period and xspacing
float[] yvalues;  // Using an array to store height values for the wave

void setup() {
w = 320;
dx = 0.40212387;
yvalues = new float[w/xspacing];

}

void loop() {
background(0);
Generatewave();
}

void Generatewave() {
// Increment theta (try different values for 'angular velocity' here
theta += 0.002;
// For every x value, calculate a y value with sine function
float x = theta;
for (int i = 0; i < yvalues.length; i++) {
yvalues[i] = sin(x)*10.0;
println(yvalues[i]);
x+=dx;
}
}

#### AWOL

#1
##### Nov 15, 2012, 03:46 pm
Quote
I want to convert the code (below) from Processing into Arduino

If instead you say "I want to convert the code (below) from Processing into C/C++", the whole thing becomes much easier.

e.g. not
Code: [Select]
float[] yvalues;
but
Code: [Select]
float yvalues [someConstantSize];
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

#### PaulS

#2
##### Nov 15, 2012, 03:46 pm
Quote
but I am getting errors with the syntax

Share them, you greedy pig!

Code: [Select]
background(0);
Your Arduino has something to paint the background color on?

Code: [Select]
println(yvalues[i]);
Where are you trying to print to? The Serial Monitor? That requires sending data to the serial port, using the Serial instance.

#### bonobono

#3
##### Nov 15, 2012, 05:29 pm
@AWOL I made that change but when I verify the code below I am now getting the following error: incompatible types in assignment of 'float*' to 'float [10]'

**@PaulS Sorry,I was not being greedy:) and well spotted, I did leave some remnants of Java behind:)...

Code: [Select]

int xspacing = 32;   // How far apart should each horizontal location be spaced
int w;              // Width of entire wave
float theta = 0.0;  // Start angle at 0
float dx;  // Value for incrementing X, a function of period and xspacing
//float[] yvalues;  // Using an array to store height values for the wave
float yvalues [10];

void setup() {
w = 320;
dx = 0.40212387;
yvalues = new float[10];
Serial.begin(9600);
}

void loop() {
Generatewave();
}

void Generatewave() {
// Increment theta (try different values for 'angular velocity' here
theta += 0.002;
// For every x value, calculate a y value with sine function
float x = theta;
for (int i = 0; i < yvalues.length; i++) {
yvalues[i] = sin(x)*10.0;
Serial.println(yvalues[i]);
x+=dx;
}
}

#### AWOL

#4
##### Nov 15, 2012, 06:19 pm
Code: [Select]
yvalues = new float[10];
If you already declared a size for the array, you don't need/want "new", so delete this line
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

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