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  ./demo/canvas-001.js ./demo/canvas-002.js ./demo/canvas-003.js ./demo/canvas-004.js ./demo/canvas-005.js ./demo/canvas-006.js ./demo/canvas-007.js ./demo/canvas-008.js ./demo/canvas-009.js ./demo/canvas-010.js ./demo/canvas-011.js ./demo/canvas-012.js ./demo/canvas-013.js ./demo/canvas-014.js ./demo/canvas-015.js ./demo/canvas-015a.js ./demo/canvas-016.js ./demo/canvas-017.js ./demo/canvas-018.js ./demo/canvas-019.js ./demo/canvas-019a.js ./demo/canvas-020.js ./demo/canvas-021.js ./demo/canvas-022.js ./demo/canvas-023.js ./demo/canvas-024.js ./demo/canvas-025.js ./demo/canvas-026.js ./demo/canvas-027.js ./demo/canvas-028.js ./demo/canvas-029.js ./demo/canvas-030.js ./demo/canvas-031.js ./demo/canvas-032.js ./demo/canvas-033.js ./demo/canvas-034.js ./demo/canvas-035.js ./demo/canvas-036.js ./demo/canvas-037.js ./demo/canvas-038.js ./demo/canvas-039.js ./demo/canvas-040.js ./demo/canvas-041.js ./demo/canvas-042.js ./demo/canvas-043.js ./demo/canvas-044.js ./demo/canvas-045.js ./demo/canvas-046.js ./demo/canvas-047.js ./demo/canvas-048.js ./demo/canvas-049.js ./demo/canvas-050.js ./demo/canvas-051.js ./demo/canvas-052.js ./demo/canvas-053.js ./demo/canvas-054.js ./demo/canvas-055.js ./demo/canvas-056.js ./demo/canvas-058.js ./demo/canvas-059.js ./demo/canvas-060.js ./demo/canvas-061.js ./demo/canvas-062.js ./demo/canvas-063.js ./demo/canvas-064.js ./demo/core-001.js ./demo/delaunator-001.js ./demo/delaunator-002.js ./demo/dom-001.js ./demo/dom-002.js ./demo/dom-003.js ./demo/dom-004.js ./demo/dom-005.js ./demo/dom-006.js ./demo/dom-007.js ./demo/dom-008.js ./demo/dom-009.js ./demo/dom-010.js ./demo/dom-011.js ./demo/dom-012.js ./demo/dom-013.js ./demo/dom-015.js ./demo/dom-016.js ./demo/dom-017.js ./demo/dom-018.js ./demo/filters-001.js ./demo/filters-002.js ./demo/filters-002a.js ./demo/filters-003.js ./demo/filters-004.js ./demo/filters-005.js ./demo/filters-006.js ./demo/filters-007.js ./demo/filters-008.js ./demo/filters-009.js ./demo/filters-010.js ./demo/filters-011.js ./demo/filters-012.js ./demo/filters-013.js ./demo/filters-014.js ./demo/filters-015.js ./demo/filters-016.js ./demo/filters-017.js ./demo/filters-018.js ./demo/filters-019.js ./demo/filters-020.js ./demo/filters-021.js ./demo/filters-022.js ./demo/filters-023.js ./demo/filters-024.js ./demo/filters-025.js ./demo/filters-026.js ./demo/filters-027.js ./demo/filters-028.js ./demo/filters-101.js ./demo/filters-102.js ./demo/filters-103.js ./demo/filters-104.js ./demo/filters-105.js ./demo/filters-501.js ./demo/filters-502.js ./demo/filters-503.js ./demo/filters-504.js ./demo/filters-505.js ./demo/mediapipe-001.js ./demo/mediapipe-002.js ./demo/mediapipe-003.js ./demo/modules-001.js ./demo/modules-002.js ./demo/modules-003.js ./demo/modules-004.js ./demo/modules-005.js ./demo/modules-006.js ./demo/packets-001.js ./demo/packets-002.js ./demo/particles-001.js ./demo/particles-002.js ./demo/particles-003.js ./demo/particles-004.js ./demo/particles-005.js ./demo/particles-006.js ./demo/particles-007.js ./demo/particles-008.js ./demo/particles-009.js ./demo/particles-010.js ./demo/particles-011.js ./demo/particles-012.js ./demo/particles-013.js ./demo/particles-014.js ./demo/particles-015.js ./demo/particles-016.js ./demo/rapier-001.js ./demo/snippets-001.js ./demo/snippets-002.js ./demo/snippets-003.js ./demo/snippets-004.js ./demo/snippets-005.js ./demo/snippets-006.js ./demo/tensorflow-001.js ./demo/tensorflow-002.js ./demo/utilities.js

- §

  # Demo Particles 012

  Use Net entity particles as reference coordinates for other artefacts

- §

  Run code

      import * as scrawl from '../source/scrawl.js'

      import { reportSpeed } from './utilities.js';

- §

  #### Scene setup

      scrawl.importDomImage('#bunny');

      const canvas = scrawl.library.artefact.mycanvas;

- §

  #### Particle physics animation scene

- §

  Create a World object; add some user-defined attributes to it

      const myWorld = scrawl.makeWorld({

          name: 'demo-world',
          tickMultiplier: 2,

      });

- §

  Create the Net entity and pin the top row of Particles

      scrawl.makeNet({

          name: 'test-net',
          world: myWorld,

          start: [50, 20],

          generate: 'weak-net',

          postGenerate: function () {

              const regex = RegExp('-0-[0-9]+$');

- §

  @ts-expect-error

              this.particleStore.forEach(p => {

                  if (regex.test(p.name)) {

                      p.set({ forces: [] });

- §

  @ts-expect-error

                      this.springs.forEach(s => {

                          if (s && s.particleFrom && s.particleFrom.name === p.name) {

                              s.particleFromIsStatic = true;
                          }
                          if (s && s.particleTo && s.particleTo.name === p.name) {

                              s.particleToIsStatic = true;
                          }
                      })
                  }
              });
          },

          rows: 15,
          columns: 17,
          rowDistance: 25,
          columnDistance: 30,

          forces: ['gravity'],

          mass: 3,
          springConstant: 200,

          engine: 'runge-kutta',

          showSpringsColor: 'lightGray',
          showSprings: true,

          particlesAreDraggable: true,

          artefact: scrawl.makeBlock({

              name: 'unseen-net-block',
              visibility: false,
          }),
      });

- §

  Create a range of entitys which use Net Particles as their reference coordinate.

      scrawl.makeBlock({

          name: 'block1',

          width: 80,
          height: 40,

          particle: 'test-net-3-3',
          lockTo: 'particle',

          strokeStyle: 'red',
          lineWidth: 5,

          method: 'draw',

      }).clone({

          name: 'block2',
          particle: 'test-net-1-3',
      });

      scrawl.makeWheel({

          name: 'wheel1',

          radius: 50,
          handle: ['center', 'center'],

          particle: 'test-net-3-12',
          lockTo: 'particle',

          strokeStyle: 'blue',
          lineWidth: 5,

          method: 'draw',

      }).clone({

          name: 'wheel2',
          particle: 'test-net-5-12',
      });

      scrawl.makePicture({

          name: 'bunny1',
          asset: 'bunny',

          width: 26,
          height: 37,

          handle: ['center', 'center'],

          copyWidth: '100%',
          copyHeight: '100%',

          particle: 'test-net-11-5',
          lockTo: 'particle',

          method: 'fill',

      }).clone({

          name: 'bunny2',
          particle: 'test-net-11-6',

      }).clone({

          name: 'bunny3',
          particle: 'test-net-11-7',

      }).clone({

          name: 'bunny4',
          particle: 'test-net-11-8',

      }).clone({

          name: 'bunny5',
          particle: 'test-net-11-9',
      });

      scrawl.makePhrase({

          name: 'phrase1',

          text: 'HELLO',
          font: '30px sans-serif',

          particle: 'test-net-7-1',
          lockTo: 'particle',

      }).clone({

          name: 'phrase2',
          particle: 'test-net-9-15',
          handleX: 'right',
          handleY: 'bottom',
          lineHeight: 0.7,
      });

      scrawl.makeStar({

          name: 'star1',

          radius1: 12,
          radius2: 8,

          points: 5,

          handle: ['center', 'center'],

          fillStyle: 'gold',
          method: 'fillThenDraw',

          particle: 'test-net-11-4',
          lockTo: 'particle',

      }).clone({

          name: 'star2',
          particle: 'test-net-11-10',
      });

      scrawl.makeLine({

          name: 'line1',

          particle: 'test-net-1-1',
          lockTo: 'particle',

          endParticle: 'test-net-5-2',
          endLockTo: 'particle',

          lineWidth: 8,
          strokeStyle: 'coral',
          lineCap: 'round',

          method: 'draw',

      }).clone({

          name: 'line2',
          particle: 'test-net-5-2',
          endParticle: 'test-net-5-6',
      });

      scrawl.makeQuadratic({

          name: 'quad1',

          particle: 'test-net-1-7',
          lockTo: 'particle',

          controlParticle: 'test-net-3-12',
          controlLockTo: 'particle',

          endParticle: 'test-net-6-7',
          endLockTo: 'particle',

          lineWidth: 8,
          strokeStyle: 'olivedrab',
          lineCap: 'round',

          method: 'draw',

      }).clone({

          name: 'quad2',
          particle: 'test-net-1-7',
          controlParticle: 'test-net-2-9',
          endParticle: 'test-net-3-7',
      });

      scrawl.makeBezier({

          name: 'bezier1',

          particle: 'test-net-8-5',
          lockTo: 'particle',

          startControlParticle: 'test-net-4-7',
          startControlLockTo: 'particle',

          endControlParticle: 'test-net-12-9',
          endControlLockTo: 'particle',

          endParticle: 'test-net-8-11',
          endLockTo: 'particle',

          lineWidth: 8,
          strokeStyle: 'purple',
          lineCap: 'round',

          method: 'draw',

      }).clone({

          name: 'bezier2',
          particle: 'test-net-9-5',
          startControlParticle: 'test-net-5-7',
          endControlParticle: 'test-net-13-9',
          endParticle: 'test-net-9-11',
      });

- §

  Temporarily removing particle-based entitys as they are too memory intensive and lead to Net entity devolving into chaos

      /*
      scrawl.makeTracer({

          name: 'trace-1',

          historyLength: 50,

          particle: 'test-net-11-13',
          lockTo: 'particle',

          artefact: scrawl.makeWheel({

              name: 'burn-1',

              radius: 5,

              handle: ['center', 'center'],

              fillStyle: 'teal',
              method: 'fill',
              visibility: false,
          }),

          stampAction: function (artefact, particle, host) {

              let history = particle.history,
                  len = history.length,
                  remaining, z, start;

              history.forEach((p, index) => {

                  [remaining, z, ...start] = p;

                  artefact.simpleStamp(host, {
                      start,
                      scale: (len - index) / len,
                  });
              });
          },

      }).clone({

          name: 'trace-2',
          particle: 'test-net-11-14',
          artefact: scrawl.library.entity['burn-1'].clone({ name: 'burn-2'}),

      }).clone({

          name: 'trace-3',
          particle: 'test-net-12-14',
          artefact: scrawl.library.entity['burn-1'].clone({ name: 'burn-3'}),

      }).clone({

          name: 'trace-4',
          particle: 'test-net-12-13',
          artefact: scrawl.library.entity['burn-1'].clone({ name: 'burn-4'}),
      });

      scrawl.makeEmitter({

          name: 'emitter-1',
          world: myWorld,

          particle: 'test-net-12-2',
          lockTo: 'particle',

          historyLength: 50,

          forces: ['gravity'],

          generationRate: 10,
          killAfterTime: 4,

          rangeX: 20,
          rangeFromX: -10,

          rangeY: 20,
          rangeFromY: -40,

          rangeZ: -1,
          rangeFromZ: -0.2,

          fillMinimumColor: 'yellow',
          fillMaximumColor: 'red',

          stampAction: function (artefact, particle, host) {

              let engine = host.engine,
                  history = particle.history,
                  len = history.length,
                  remaining, radius, alpha, x, y, z,
                  endRad = Math.PI * 2;

              let colorFactory = this.fillColorFactory;

              engine.save();
              engine.setTransform(1, 0, 0, 1, 0, 0);

              if (len > 0) {

                  [remaining, z, x, y] = history[0];

                  alpha = remaining / 7;

                  if (alpha > 0) {

                      engine.globalAlpha = alpha;

                      history.forEach((p, index) => {

                          [remaining, z, x, y] = p;
                          radius = 2 * (1 + (z / 6));

                          if (radius > 0) {

                              engine.beginPath();
                              engine.moveTo(x, y);
                              engine.arc(x, y, radius, 0, endRad);
                              engine.fillStyle = colorFactory.getRangeColor(1 - (index / len));

- §

  engine.fillStyle = colorFactory.get(1 - (index / len));

                              engine.fill();
                          }
                      });
                  }
              }
              engine.restore();
          },
      });
      */

      scrawl.makePolyline({

          name: 'polyline-1',

          pins: [[0,0], [0,10], [120,10], [120,0]],
          tension: 0.3,

          particle: 'test-net-12-5',
          lockTo: 'particle',

          strokeStyle: 'cornflowerblue',
          lineWidth: 6,
          lineCap: 'round',
          lineJoin: 'round',
          method: 'draw',

      }).clone({

          name: 'polyline-2',
          lockTo: 'start',

          tension: 0.4,
          closed: true,
          useParticlesAsPins: true,

          mapToPins: true,
          pins: ['test-net-0-1', 'test-net-0-2', 'test-net-0-3', 'test-net-0-4', 'test-net-0-5', 'test-net-0-6', 'test-net-0-7', 'test-net-0-8', 'test-net-0-9', 'test-net-0-10', 'test-net-0-11', 'test-net-0-12', 'test-net-0-13', 'test-net-0-14', 'test-net-0-15', 'test-net-1-16', 'test-net-2-16', 'test-net-3-16', 'test-net-4-16', 'test-net-5-16', 'test-net-6-16', 'test-net-7-16', 'test-net-8-16', 'test-net-9-16', 'test-net-10-16', 'test-net-11-16', 'test-net-12-16', 'test-net-13-16', 'test-net-14-15', 'test-net-14-14', 'test-net-14-13', 'test-net-14-12', 'test-net-14-11', 'test-net-14-10', 'test-net-14-9', 'test-net-14-8', 'test-net-14-7', 'test-net-14-6', 'test-net-14-5', 'test-net-14-4', 'test-net-14-3', 'test-net-14-2', 'test-net-14-1', 'test-net-13-0', 'test-net-12-0', 'test-net-11-0', 'test-net-10-0', 'test-net-9-0', 'test-net-8-0', 'test-net-7-0', 'test-net-6-0', 'test-net-5-0', 'test-net-4-0', 'test-net-3-0', 'test-net-2-0', 'test-net-1-0'],

          strokeStyle: 'rosybrown',

          shadowOffsetX: 3,
          shadowOffsetY: 3,
          shadowBlur: 2,
          shadowColor: 'black',
      });

- §

  #### Scene animation

  Function to display frames-per-second data, and other information relevant to the demo

      const report = reportSpeed('#reportmessage');

- §

  Create the Display cycle animation

      scrawl.makeRender({

          name: 'demo-animation',
          target: canvas,
          afterShow: report,
      });

- §

  #### User interaction

  Make the Net Particles draggable

  - KNOWN BUG - the particles are not draggable on first user mousedown, but are draggable afterwards

      scrawl.makeGroup({

          name: 'my-draggable-group',

      }).addArtefacts('test-net');

      scrawl.makeDragZone({

          zone: canvas,
          collisionGroup: 'my-draggable-group',
          endOn: ['up', 'leave'],
          preventTouchDefaultWhenDragging: true,
      });

- §

  #### Development and testing

      console.log(scrawl.library);