Devin Frenze

i'm trying to change the behavior of my patch so that i can adjust the angle of the movement that a jit.gl.sketch is drawing based on where it is positioned (currently it is random). when i post(sketch.position) it just posts "0 0 0" even when it is clearly not at the origin. so clearly i'm not using the right method to access object attributes.

what do i have to do to correctly get the position attribute?

what do i have to do to correctly get the position attribute?
thanks in advance!


get-position-attribtue-of-jit-gl-sketch-in-javascript

i'm sorry. i probably should have posted this in javascript. i won't double-post it now, but i'll ask on the javascript forum if i don't get responses.

hi devin. this is not going to work, the sketch position attribute is not linked to the internal sketch command list position.

you will have to keep track of it yourself, and use the moveto and lineto drawing variants.

here's a modified version of your script:

inlets = 1;
outlets = 1;

var radius = 0.03;
var speed = 0.01;
var counter = 0;
var sketch = new JitterObject("jit.gl.sketch", "rex");
var direction = Math.random()*Math.PI*2;
var pos = [0,0,0];

function msg_int( i) {
    if(i==0) {
        if(counter==1) {
            counter--;
            sketch.reset();
            pos = [0,0,0];
        } else if(counter>1) {
            counter--;
        }
    } else {
        do_move(radius*Math.sin(direction), radius*Math.cos(direction), 0);
        sketch.framecircle(radius, 0, 360);
        direction = Math.random()*Math.PI*2;
        do_move(radius*Math.sin(direction), radius*Math.cos(direction), 0);
        counter++;
        originAngle();
    }
}

function bang() {
    if(counter>0) {
        do_line(speed*Math.sin(direction), speed*Math.cos(direction), 0);
    }
}

function originAngle() {
    post(pos);
    post();
}

function do_move(x,y,z) {
    pos[0]+=x;
    pos[1]+=y;
    pos[2]+=z;
    sketch.moveto(pos);
}

function do_line(x,y,z) {
    pos[0]+=x;
    pos[1]+=y;
    pos[2]+=z;
    sketch.lineto(pos);
}


hi devin. this is not going to work, the sketch position attribute is not linked to the internal sketch command list position.
you will have to keep track of it yourself, and use the moveto and lineto drawing variants.
here's a modified version of your script:

inlets = 1;
outlets = 1;

var radius = 0.03;
var speed = 0.01;
var counter = 0;
var sketch = new JitterObject("jit.gl.sketch", "rex");
var direction = Math.random()*Math.PI*2;
var pos = [0,0,0];

function msg_int( i) {
	if(i==0) {
		if(counter==1) {
			counter--;
			sketch.reset();
			pos = [0,0,0];
		} else if(counter>1) {
			counter--;
		}
	} else {
		do_move(radius*Math.sin(direction), radius*Math.cos(direction), 0);
		sketch.framecircle(radius, 0, 360);
		direction = Math.random()*Math.PI*2;
		do_move(radius*Math.sin(direction), radius*Math.cos(direction), 0);
		counter++;
		originAngle();
	}
}

function bang() {
	if(counter>0) {
		do_line(speed*Math.sin(direction), speed*Math.cos(direction), 0);
	}
}

function originAngle() {
	post(pos);
	post();
}

function do_move(x,y,z) {
	pos[0]+=x;
	pos[1]+=y;
	pos[2]+=z;
	sketch.moveto(pos);
}

function do_line(x,y,z) {
	pos[0]+=x;
	pos[1]+=y;
	pos[2]+=z;
	sketch.lineto(pos);
}


thank you rob! will do it this way from now on.

get position attribtue of jit.gl.sketch in javascript