Color a RoundBrush

dieter.me..

in Contributed Library Questions • 2 years ago

Hello,

I am an R, C# and Java programmer, working in medical signal processing, but new to .. this Processing.

I am playing around with

https://forum.processing.org/topic/creating-a-3d-slice-from-a-image-silhouette

to learn how to handle Volumetric Brushes (background: MRI processing)

First, I noted that

brush.setMode(VolumetricBrush.MODE_PEAK);

does no longer exist in the docs. Looks like it is not important, things work anyway.

Question: How do I color these brush? I added fill() in the parse loop, but that did not work

Dieter Menne

Replies(2)

Chrisir

Re: Color a RoundBrush

2 years ago

did you try stroke()?

Chrisir

dieter.me..

Re: Color a RoundBrush

2 years ago

Thank, yes, I tried stroke, but I do not want to color the strokes. Here is the simple change I made to the code from the example mentioned above. It gives a homogeneous light-green color, but I expected some gradient-type.

for (int y = 0; y < img.height; y ++) {
for (int x = 0; x < img.width; x ++) {
int col=img.pixels[y * img.width + x] & 0xff;
if (col > THRESH) {
for (int z = 0, d=FIXED_DEPTH ? DEPTH : (int)(col/255.0*DEPTH); z < d; z++) {
fill(y, col,10); // Added this to the sample
brush.drawAtGridPos(x, y, z, 0.6);
}
}
}
}

Here is the sample.

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