apply and expression to jit.noise

efe's icon

Hello!
I am trying to port this simple jitter code into java:

Max Patch
Copy patch and select New From Clipboard in Max.

However, i am finding difficulties to apply the expression to the noise. Maybe a simple solution but i haven't been able to figure it out. I realize that i suck in java!
So far this:

import com.cycling74.max.*;
import com.cycling74.jitter.*;

public class NoiseExpr2 extends MaxObject
{
JitterObject noiss;
JitterObject expression;
JitterMatrix dim1;
JitterMatrix dim2;

public NoiseExpr2(Atom[] args){
declareInlets(new int[]{DataTypes.ALL});
declareOutlets(new int[]{DataTypes.ALL});
noiss=new JitterObject( "jit.noise");
expression=new JitterObject("jit.expr");
expression.setAttr("expr","hypot((norm[0]-0.5)+((in[0]*0.1)-0.05) , (norm[1]-0.5))");
dim1=new JitterMatrix("dimen",3,"float32",10,100);
noiss.matrixcalc(null,dim1);
expression.matrixcalc(noiss,dim1);
//noiss.expr("hypot((norm[0]-0.5)+((in[0]*0.1)-0.05) , (norm[1]-0.5))");
}

public void bang(){
noiss.matrixcalc(null,dim1);
outlet(0,"jit_matrix",new Atom[]{Atom.newAtom(dim1.getName())});
}
}

any idea?

Emmanuel

Florito's icon

one way to create a JitterObject:

JitterObject(java.lang.String classname, com.cycling74.max.Atom[] args)
creates a JitterObject

so your noiss should be
// jit.noise 12 float32 10 10
Atom[] args = new Atom[] {
Atom.newAtom(12),
Atom.newAtom("float32"),
Atom.newAtom(10),
Atom.newAtom(10)
}
noiss=new JitterObject("jit.noise", args);

also, you could check if your noiss.matrixcalc is succesfull by doing
boolean success = noiss.matrixcalc(null,dim1);
post("noiss succes: "+success);

btw. the outlet can also be called like this:outlet(0,"jit_matrix", dim1.getName());
(no need to create atoms)

I am doing this off the top of my head, so I can't guarantee success.
Alos, I haven't worked with JitterObjects like noise in java yet either...
Will get back to it.

Marcus

efe's icon

Thank you Marcus:
nice tips!. However, the problem is not to generate the noise in java(that is working already) but to apply the expression to the matrix. Somehow i was thinking that by using the expr as a method(noiss.expr) it would work, but it didn't.
Emmanuel

efe's icon

Another option might be to use the java lang directly. But it seems strange that jit.expr cannot be used as a simple JitterObject

Florito's icon

It's working:

import com.cycling74.jitter.JitterMatrix;
import com.cycling74.jitter.JitterObject;
import com.cycling74.max.DataTypes;
import com.cycling74.max.MaxObject;

public class NoiseExpr2 extends MaxObject {

    JitterObject noise;
    JitterMatrix noiseOut;

    JitterObject expression;
    JitterMatrix expressionOut;

    public NoiseExpr2() {

        declareOutlets(new int[] {DataTypes.ALL, DataTypes.ALL});

        // jit.noise 12 float32 10 10
        noise = new JitterObject("jit.noise");//, noiseArgs);
        noise.setAttr("planecount", 12);
        noise.setAttr("type", "float32");
        noise.setAttr("dim", new int[] { 10,10});

        noiseOut = new JitterMatrix(12, "float32", 10, 10);

        // jit.expr @expr "hypot((norm[0]-0.5)+((in[0]*0.1)-0.05) , (norm[1]-0.5))"
        expression=new JitterObject("jit.expr");
        expression.setAttr("expr","hypot((norm[0]-0.5)+((in[0]*0.1)-0.05) , (norm[1]-0.5))");

        expressionOut = new JitterMatrix(12, "float32", 10, 10);

    }

    public void bangnoise() {
        noise.matrixcalc(null, noiseOut);
        outlet(1, "jit_matrix", noiseOut.getName());
    }

    public void bang() {
        bangnoise();
        expression.matrixcalc(noiseOut, expressionOut);
        outlet(0, "jit_matrix", expressionOut.getName());
    }

}
Florito's icon

And here's an example patch using this object:

Max Patch
Copy patch and select New From Clipboard in Max.

efe's icon

Thank you Marcus!
You are really a java-jitter guru
it is quite interesting the use of two matrices