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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 Canvas 064

  Animation object: gradient along a line

- §

  Run code

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

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

- §

  #### Scene setup

      const canvas = scrawl.library.canvas.mycanvas;

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  Create the Display cycle animation

      canvas.setBase({
          cleared: false,
      });

      scrawl.makeGroup({

          name: 'pin-group',
          host: canvas.base.name,
      });

      const pinArray = [];

      for (let i = 0; i < 6; i++) {

          pinArray.push(scrawl.makeWheel({

              name: `pin-${i}`,
              group: 'pin-group',
              radius: 22,
              startX: `${5 + ((90 / 5) * i)}%`,
              startY: '50%',
              handle: ['center', 'center'],
              strokeStyle: 'white',
              lineWidth: 3,
              method: 'none',
              lineDash: [2, 4],
          }));
      }

      scrawl.makeDragZone({

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

      const snake = scrawl.makePolyline({

          name: 'snake',
          pins: ['pin-0', 'pin-1', 'pin-2', 'pin-3', 'pin-4', 'pin-5'],
          tension: 0.5,
          mapToPins: true,
          useAsPath: true,
          strokeStyle: 'white',
          lineWidth: 3,
          method: 'none',
      });

      const reportLength = scrawl.makePhrase({

          name: 'report-length',
          text: '',
          fillStyle: 'white',
          font: '2em Arial, sans-serif',
          start: ['center', 10],
          handleX: 'center',
          method: 'none',
      });

      const colorFactory = scrawl.makeColor({

          name: 'color-factory',
          minimumColor: 'red',
          maximumColor: 'blue',
          colorSpace: 'OKLAB',
      });

      const snakeScale = scrawl.makeWheel({

          name: `scale`,
          handle: ['center', 'center'],
          radius: 40,
          path: 'snake',
          lockTo: 'path',
          constantSpeedAlongPath: true,
          method: 'none',
      });

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  #### Scene animation

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

      const report = reportSpeed('#reportmessage');

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  Handle the Display cycle directly, using an Animation object

      scrawl.makeAnimation({

          name: 'demo-animation',

          fn: function () {

              canvas.base.clear();
              canvas.compile();

              const len = Math.ceil(snake.length);

              for (let i = 0; i < len; i++) {

                  const norm = i / len;

                  snakeScale.simpleStamp(canvas.base, {

                      method: 'fill',
                      fillStyle: colorFactory.getRangeColor(norm),
                      pathPosition: norm,
                  });
              }

              pinArray.forEach(p => {

                  p.simpleStamp(canvas.base, {
                      method: 'draw',
                  });
              });

              snake.simpleStamp(canvas.base, {
                  method: 'draw',
              });

              reportLength.simpleStamp(canvas.base, {
                  text: `Length: ${len}`,
                  method: 'fill',
              });

              canvas.show();

              report();
          },
      })

- §

  #### Development and testing

      console.log(scrawl.library);