Rendering many lines quickly

bridges2

Hi,

I'm trying to render roughly 50k lines at 60 fps. They will have static geometry, but I want to be able to zoom in and translate.

I tried using PShape, but it scales the stroke as well, which makes it unusable. Is there a way to get around this?

I noticed other threads mentioned GLModel, but this library has not been updated for a few years.

I could use a custom shader and a VBO, but I was wondering if there was another, better, way before going into low level OpenGL.

Any ideas?

Thanks!

clankill3r

Maybe you can scale the stroke weight down:

PShape s;

void setup() {
  size(600, 600);

  s = createShape();

  s.beginShape();
  s.vertex(10, 10);
  s.vertex(50, 10);
  s.vertex(50, 50);
  s.vertex(10, 50);
  s.endShape();
}


void draw() {
  background(255);
  s.beginShape();
  s.strokeWeight(1.0);
  s.endShape();
  shape(s);

  float scale = 10;
  scale(scale);
  s.beginShape();
  s.strokeWeight(1.0/scale);
  s.endShape();
  shape(s);
}

Chrisir

maybe you can enter all the lines (when they are constant) in a GROUP PShape in setup() and work with this. See tutorial on PShape please