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<html>
  <head>
    <meta charset='utf-8'>
    <meta name='viewport' content='width=device-width, initial-scale=1, user-scalable=no'>
    <meta name='mobile-web-app-capable' content='yes'>
    <meta name='apple-mobile-web-app-capable' content='yes'>
    <link rel='icon' type='image/png' sizes='32x32' href='../favicon-32x32.png'>
    <link rel='icon' type='image/png' sizes='96x96' href='../favicon-96x96.png'>
    <link rel='stylesheet' href='../css/common.css'>

    <title>Pointer Painter</title>
  </head>
  <body>
    <header>
      <details open>
        <summary>Pointer painter</summary>
        <p>
          Leaves behind a trail of pointers and cursors on select events. Useful
          for testing screen input.
          <a class="back" href="./">Back</a>
        </p>
      </details>
    </header>
    <script type="module">
      import {WebXRSampleApp} from '../js/webxr-sample-app.js';
      import {WebXRButton} from '../js/util/webxr-button.js';
      import {Gltf2Node} from '../js/render/nodes/gltf2.js';
      import {vec3} from '../js/render/math/gl-matrix.js';
      import {Ray} from '../js/render/math/ray.js';
      import {QueryArgs} from '../js/util/query-args.js';

      // If requested, use the polyfill to provide support for mobile devices
      // and devices which only support WebVR.
      import WebXRPolyfill from '../js/third-party/webxr-polyfill/build/webxr-polyfill.module.js';
      if (QueryArgs.getBool('usePolyfill', true)) {
        let polyfill = new WebXRPolyfill();
      }

      // WebXR sample app setup
      class CustomWebXRSampleApp extends WebXRSampleApp {
        constructor(options) {
          super(options);
          this.selecting = false;

          this.scene._resetInputEndFrame = false;
        }

        onSessionStarted(session) {
          super.onSessionStarted(session);

          session.addEventListener('selectstart', () => { this.selecting = true; });
          session.addEventListener('selectend', () => { this.selecting = false; });
          session.addEventListener('select', (ev) => {
            let refSpace = this.getSessionReferenceSpace(ev.frame.session);
            let targetRayPose = ev.frame.getPose(ev.inputSource.targetRaySpace, refSpace);
            if (!targetRayPose) {
              return;
            }

            this.scene.inputRenderer.addLaserPointer(targetRayPose.transform);

            let targetRay = new Ray(targetRayPose.transform);
            let cursorDistance = 2.0;
            let cursorPos = vec3.fromValues(
                targetRay.origin.x,
                targetRay.origin.y,
                targetRay.origin.z
                );
            vec3.add(cursorPos, cursorPos, [
                targetRay.direction.x * cursorDistance,
                targetRay.direction.y * cursorDistance,
                targetRay.direction.z * cursorDistance,
                ]);
            this.scene.inputRenderer.addCursor(cursorPos);
          });
        }

        onRendererInit() {
          super.onRendererInit();
        }

        onXRFrame(time, frame, refSpace) {
          for (let inputSource of frame.session.inputSources) {
            if (this.selecting) {
              let targetRayPose = frame.getPose(inputSource.targetRaySpace, refSpace);
              if (targetRayPose) {
                this.scene.inputRenderer.addLaserPointer(targetRayPose.transform);
              }
            }

            if (inputSource.gripSpace) {
              let gripPose = frame.getPose(inputSource.gripSpace, refSpace);
              if (gripPose) {
                this.scene.inputRenderer.addController(gripPose.transform.matrix, inputSource.handedness, inputSource.profiles[0]);
              }
            }
          }

          super.onXRFrame(time, frame, refSpace);

          this.scene.inputRenderer.reset({ controllers: true })
        }
      };

      let app = new CustomWebXRSampleApp({
        referenceSpace: 'local-floor',
        defaultInputHandling: false
      });
      document.querySelector('header').appendChild(app.xrButton.domElement);

      app.scene.addNode(new Gltf2Node({url: '../media/gltf/garage/garage.gltf'}));
      app.scene.enableStats(false);

      // Start the XR application.
      app.run();
    </script>
  </body>
</html>