- Jump To … +
  ./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 054

  Animated contour lines: map a complex gradient to NoiseAsset output

- §

  Run code

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

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

- §

  #### Scene setup

      const canvas = scrawl.library.artefact.mycanvas;

- §

  Add the NoiseAsset, and a Picture entity in which to display it

      const myNoise = scrawl.makeNoiseAsset({
          name: 'base-noise',
          width: 600,
          height: 600,
          scale: 80,

          paletteStart: 399,
          paletteEnd: 999,
          choke: 50,
          precision: 1,
          delta: {
              paletteStart: -1,
              paletteEnd: -1,
          },

          cyclePalette: true,

          colorSpace: 'LAB',

          colors: [
              [0, '#000000'],
              [19, '#806e58'],
              [39, '#ab7533'],
              [59, '#f78b07'],
              [79, '#fae69d'],
              [99, '#e8e7e3'],
              [119, '#babab6'],
              [139, '#f7f7f2'],
              [159, '#b0b094'],
              [179, '#f2f2dc'],
              [199, '#757544'],
              [219, '#e6e670'],
              [239, '#dbdb2a'],
              [259, '#919129'],
              [279, '#969608'],
              [299, '#f5f50c'],
              [319, '#f5da0c'],
              [339, '#968606'],
              [359, '#d6c53a'],
              [379, '#918839'],
              [399, '#f5eb90'],
              [419, '#c7c293'],
              [439, '#c7b093'],
              [459, '#c9c0b3'],
              [479, '#f7f0e6'],
              [499, '#bf9a65'],
              [519, '#b56e07'],
              [539, '#f79502'],
              [559, '#d69533'],
              [579, '#704402'],
              [599, '#805d2a'],
              [619, '#ebd9d5'],
              [639, '#dfede1'],
              [659, '#dfe9ed'],
              [679, '#a0cadb'],
              [699, '#d2f0fc'],
              [719, '#7d888c'],
              [739, '#a8b2b5'],
              [759, '#edf3f5'],
              [779, '#a2c0de'],
              [799, '#8a98a6'],
              [819, '#b4b6b8'],
              [839, '#f2f5f7'],
              [859, '#eaebda'],
              [879, '#d2d687'],
              [899, '#686b2e'],
              [919, '#aab038'],
              [939, '#474a14'],
              [959, '#b4bd28'],
              [979, '#656b03'],
              [999, '#000000'],
          ],
      });

      scrawl.makePicture({
          name: 'base-noise-subscriber',
          asset: 'base-noise',
          dimensions: ['100%', '100%'],
          copyDimensions: ['100%', '100%'],
      });

- §

  #### 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,

          commence: () => myNoise.update(),
      });

- §

  #### Development and testing

      console.log(scrawl.library);