Send individual msj to a shader

vjjv

hey everybody. this time i've a problem sending invididual mensajes to a fragment shader. I've an array of spheres, and i want that every sphere have a different size of blur, witch is a uniform of the fragment. The main code is from an example, a post-processing effects.

How can i do?

import controlP5.*;

ControlP5 cp5;
import peasy.*;

ArrayList<Sphere>s;

PGraphics canvas;

PGraphics brightPass;
PGraphics horizontalBlurPass;
PGraphics verticalBlurPass;

PShader bloomFilter;
PShader blurFilter;
PeasyCam cam;
float angle = 0;

final int surfaceWidth = 250;
final int surfaceHeight = 250;

float luminanceFilter = 0.02;
float blurSize = 100;
float sigma = 200;

void setup()
{
  cam = new PeasyCam(this, 1400);
  size(1000, 1000, P3D);

  s = new ArrayList<Sphere>();

  canvas = createGraphics(width, height, P3D);

  brightPass = createGraphics(width, height, P2D);
  brightPass.noSmooth();

  horizontalBlurPass = createGraphics(width, height, P2D);
  horizontalBlurPass.noSmooth(); 

  verticalBlurPass = createGraphics(width, height, P2D);
  verticalBlurPass.noSmooth(); 

  bloomFilter = loadShader("bloomFrag.glsl");
  blurFilter = loadShader("blurFrag.glsl");
}

void draw()
{
  background(0);
  bloomFilter.set("brightPassThreshold", luminanceFilter);
  angle += 0.05;

  for(Sphere s: s){
  blurFilter.set("blurSize", s.p);
  }

  blurFilter.set("sigma", sigma); 

  canvas.beginDraw();
  render(canvas);
  canvas.endDraw();

  // bright pass
  brightPass.beginDraw();
  brightPass.shader(bloomFilter);
  brightPass.image(canvas, 0, 0);
  brightPass.endDraw();

  // blur horizontal pass
  horizontalBlurPass.beginDraw();
  blurFilter.set("horizontalPass", 1);
  horizontalBlurPass.shader(blurFilter);
  horizontalBlurPass.image(brightPass, 0, 0);
  horizontalBlurPass.endDraw();

  // blur vertical pass
  verticalBlurPass.beginDraw();
  blurFilter.set("horizontalPass", 0);
  verticalBlurPass.shader(blurFilter);
  verticalBlurPass.image(horizontalBlurPass, 0, 0);
  verticalBlurPass.endDraw();


  cam.beginHUD();
  blendMode(BLEND);
  blendMode(SCREEN);
  image(brightPass, 0, 0);
  image(verticalBlurPass, 0, 0);

  cam.endHUD();

println(frameRate);
}

void render(PGraphics pg)
{
  cam.getState().apply(pg);

  pg.background(0, 50);

  canvas.pushMatrix();
  canvas.translate(width/2, height/2);
  for(Sphere s: s){
  s.display();

  }
  canvas.popMatrix();


}

void mousePressed() {
  s.add(new Sphere(random(-width/2, width/2), random(-height/2, height/2), random(1000)));
}


class Sphere {

  float p;
  float w;
  float h;

  Sphere(float _w, float _h, float _p) {
  p = _p;
  w = _w;
  h = _h;
  }

  void display() {
    canvas.pushMatrix();
    canvas.translate(w, h);
    noFill();
    canvas.sphere(100);

    canvas.popMatrix();
  }
}

jeremydouglass

Re:

i want that every sphere have a different size of blur

We are moving to a new forum; you may wish to post this question there. Also, check out a recent discussion on the new forum of depth of field shading on spheres, here:

• https://discourse.processing.org/t/depth-of-field-effect-with-a-shader/265

vjjv

Thanks jeremy, i already posted there. What i understand now is that a uniform is a constant value, and i need a INPUT value that change everytime a shader instance is on, just like a texCoord input. How can i program my own input?