src/examples/heightmap-with-color-scale.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Heightmap with Color Scale</title>
    <link rel="stylesheet" href="/css/examples.css?ver=1.0.0" />
    <script src="/js/examples.js?ver=1.0.0"></script>
    <script src="/lib/phaser.min.js"></script>
    <script src="/lib/enable3d.phaserExtension.0.19.1.min.js"></script>
    <script src="/lib/chroma.min.js"></script>
  </head>

  <body>
    <div id="info-text">
      This heightmap has been created from
      <a href="/assets/heightmap/heightmap-island.png"> this png file</a>.
    </div>
    <script>
      const { enable3d, Scene3D, Canvas } = ENABLE3D

      class MainScene extends Scene3D {
        constructor() {
          super({ key: 'MainScene' })
        }

        init() {
          this.requestThirdDimension()
        }

        async create() {
          this.accessThirdDimension()
          // we remove the default ground
          this.third.warpSpeed('-ground')
          this.third.camera.position.set(10, 10, 20)

          // this.third.physics.debug.enable()

          this.input.on('pointerdown', () => {
            this.third.haveSomeFun(1)
          })

          // heightmap from https://medium.com/@travall/procedural-2d-island-generation-noise-functions-13976bddeaf9
          const heightmap = await this.third.load.texture('/assets/heightmap/heightmap-island.png')

          // Powered by Chroma.js (https://github.com/gka/chroma.js/)
          const colorScale = chroma
            .scale(['#003eb2', '#0952c6', '#a49463', '#867645', '#3c6114', '#5a7f32', '#8c8e7b', '#a0a28f', '#ebebeb'])
            .domain([0, 0.025, 0.1, 0.2, 0.25, 0.8, 1.3, 1.45, 1.6])

          const mesh = this.third.heightMap.add(heightmap, { colorScale })
          if (mesh) {
            // yes, you have to convert it manually :/
            mesh.geometry = this.third.transform.geometryToBufferGeometry(mesh.geometry)
            // we position, scale, rotate etc. the mesh before adding physics to it
            mesh.scale.set(2, 2, 2)
            this.third.physics.add.existing(mesh, { mass: 0 })
          }
        }
      }

      const config = {
        type: Phaser.WEBGL,
        scale: {
          mode: Phaser.Scale.FIT,
          autoCenter: Phaser.Scale.CENTER_BOTH,
          width: window.innerWidth * Math.max(1, window.devicePixelRatio / 2),
          height: window.innerHeight * Math.max(1, window.devicePixelRatio / 2)
        },
        scene: [MainScene],
        ...Canvas()
      }

      window.addEventListener('load', () => {
        enable3d(() => new Phaser.Game(config)).withPhysics('/lib')
      })
    </script>
  </body>
</html>