Is masking available for vector shapes, outside of PImage.mask()?

Processing Libraries
3

That’s a great question!

You could install from the IDE the Geomerative library that can do SVG and “RShape” clipping and intersections. (RShape is a vector object for the lib).

import geomerative.*;

RShape shp1;
RShape shp2;
RShape shp3;
RShape cursorShape;

void setup()
{
  size(400, 400);
  smooth();

  RG.init(this);

  shp1 = RG.loadShape("Toucan.svg");
  shp2 = RShape.createStar(0, 0, 100.0, 80.0, 20);

  shp1.centerIn(g);
}

void draw()
{
  background(255);    
  translate(width/2,height/2);

  cursorShape = new RShape(shp2);
  cursorShape.translate(mouseX - width/2, mouseY - height/2);
  
  // Only intersection() does not work for shapes with more than one path
  shp3 = RG.intersection( shp1, cursorShape );
  
  strokeWeight( 3 );

  if(mousePressed){
    fill( 0 , 220 , 0 , 30 );
    stroke( 0 , 120 , 0 );
    RG.shape(shp1);

    fill( 220 , 0 , 0 , 30 );
    stroke( 120 , 0 , 0 );
    RG.shape(cursorShape);
  }
  else{
    fill( 220 );
    stroke( 120 );
    RG.shape(shp3);
  }
}

geomerative
geomerative780×463 78 KB

I really wish there would be a simpler way. I have found some poly clipping libraries I thought I could adapt, but they are horribly broken :frowning: (watch me crash here Boolean operation in polygons)

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