C++ (Cpp) eval_gradients Examples

Example #1

File: GModelSpatialRadial.cpp Project: TarekHC/gammalib

/***********************************************************************//**
 * @brief Return model value and set analytical gradients
 *
 * @param[in] photon Incident Photon.
 *
 * Evaluates the radial spatial model value and analytical model parameter
 * gradients for a specific incident @p photon.
 ***************************************************************************/
double GModelSpatialRadial::eval_gradients(const GPhoton& photon) const
{
    // Compute distance from source (in radians)
    double theta = photon.dir().dist(dir());

    // Evaluate model and set gradients
    double value = eval_gradients(theta, photon.energy(), photon.time());

    // Return result
    return value;
}

Example #2

File: GModelRadial.cpp Project: adonath/gammalib

/***********************************************************************//**
 * @brief Return model value and set analytical gradients
 *
 * @param[in] srcDir True photon arrival direction.
 *
 * Evaluates the radial spatial model for a given true photon arrival
 * direction.
 ***************************************************************************/
double GModelRadial::eval_gradients(const GSkyDir& srcDir) const
{
    // Compute distance from source (in radians)
    double theta = srcDir.dist(dir());

    // Evaluate model and set gradients
    double value = eval_gradients(theta);

    // Return result
    return value;
}