step method

IrradianceFieldBake? step()

Runs the next batch of probes. Returns the finished IrradianceFieldBake on completion, or null while more steps remain.

Implementation

IrradianceFieldBake? step() {
  if (isDone) return _finalize();

  final end = math.min(_totalProbes, _currentProbe + probesPerStep);
  final fov = 2.0 * math.atan(1.0 / cubeFaceOverscan(faceResolution));
  final size = ui.Size(faceResolution.toDouble(), faceResolution.toDouble());

  for (var i = _currentProbe; i < end; i++) {
    final slotZ =
        i ~/ (layout.resolution.x.toInt() * layout.resolution.y.toInt());
    final rem =
        i % (layout.resolution.x.toInt() * layout.resolution.y.toInt());
    final slotY = rem ~/ layout.resolution.x.toInt();
    final slotX = rem % layout.resolution.x.toInt();

    final worldPos =
        origin +
        Vector3(slotX * spacing.x, slotY * spacing.y, slotZ * spacing.z);

    final faces = <gpu.Texture>[];
    for (final (forward, up) in cubeFaceBases) {
      final face = createHdrCaptureTarget(faceResolution);
      _pool.beginFrame();
      _renderView(
        view: RenderView(
          camera: PerspectiveCamera(
            fovRadiansY: fov,
            position: worldPos,
            target: worldPos + forward,
            up: up,
          ),
          layerMask: layerMask,
        ),
        outputColor: face,
        pixelSize: size,
        pool: _pool,
        environmentMap: environmentMap,
        transientsBuffer: transientsBuffer,
        lightComponent: lightComponent,
        punctualLighting: punctualLighting,
        spotShadowFrame: spotShadowFrame,
        captureLinearColor: true,
      );
      faces.add(face);
    }

    _convolveProbe(probeIndex: i, faces: faces);
  }

  _currentProbe = end;
  if (isDone) return _finalize();
  return null;
}