Surface Manipulation Problem - generating new iteration through variables but will not delete old sets.HELP?

bwhite25

Surface Manipulation Problem - generating new iteration through variables but will not delete old sets.HELP?

in Contributed Library Questions • 1 year ago

I am manipulating geometry with analog input via Arduino [Potenometer]. This is working with the exception of the geometry is being added on top of old sets when ideally I would like it to be visualized as a manipulation of the surface.

I've placed a photo to describe in more detail...

I am new to processing/arduino so please bare with me.

Here is the code:

import processing.opengl.*;
import igeo.*;
import processing.serial.*;
Serial port;
float var = 0;
int rvar = round(var);
void setup()
{
size(500,500, IG.GL );
port = new Serial(this, "COM3", 9600);
port.bufferUntil('\n');
}
void draw()
{
// 4 points in u direction, 3 points in v direction
double[][][] controlPoints =
{{{ 0, 0, 0}, { 10, 0, var}, { 20, 0, 0}},
{{ 0, 10, var}, { 10, 10, var*2}, { 20, 10, var}},
{{ 0, 20, var}, { 10, 20, var*2}, { 20, 20, var}},
{{ 0, 30, 0}, { 10, 30, var}, { 20, 30, 0}}};
// u degree = 3, v degree = 2
new ISurface(controlPoints, 3, 2).clr(1,.8,0);
}
void serialEvent (Serial port)
{
var = float(port.readStringUntil('\n'));
}

Replies(2)

PhiLho

Re: Surface Manipulation Problem - generating new iteration through variables but will not delete old sets.HELP?

1 year ago

I don't know igeo (that's why I moved it in Contributed Library Questions, as it might needs knowledge of such library), but aren't you supposed to call background() at the start of draw() to avoid accumulation of drawings?

bwhite25

Re: Surface Manipulation Problem - generating new iteration through variables but will not delete old sets.HELP?

1 year ago

When background() is called the screen iGeo visuals are overridden by the color called for background.

I think this may be an issue with noLoop(), redraw(), loop() but I do not understand the syntax and its placement in the function. Do you know how to call a new draw every loop? I need the script to compute new everytime the input variable is adjusted.

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