LightProbe.java

IndirectLight buildIndirectLight() {
    Preconditions.checkNotNull(irradianceData, "\"irradianceData\" was null.");
    Preconditions.checkState(
        irradianceData.length >= FLOATS_PER_VECTOR,
        "\"irradianceData\" does not have enough components to store a vector");

    if (reflectCubemap == null) {
      throw new IllegalStateException("reflectCubemap is null.");
    }

    // Modulates ambient color with modulation factor. irradianceData must have at least one vector
    // of three floats.
    irradianceData[0] = ambientColor.r * colorCorrection.r;
    irradianceData[1] = ambientColor.g * colorCorrection.g;
    irradianceData[2] = ambientColor.b * colorCorrection.b;

    IndirectLight indirectLight =
        new IndirectLight.Builder()
            .reflections(reflectCubemap)
            .irradiance(SH_ORDER, irradianceData)
            .intensity(intensity * lightEstimate)
            .build(EngineInstance.getEngine().getFilamentEngine());

    // There is a bug in filament where setting the rotation doesn't work if it is done using
    // the builder. It must be done on the actual indirect light object.
    if (rotation != null) {
      indirectLight.setRotation(quaternionToRotationMatrix(rotation));
    }

    if (indirectLight == null) {
      throw new IllegalStateException("Light Probe is invalid.");
    }
    return indirectLight;
  }