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/** \authors Jia Pan, Florent Lamiraux, Josef Mirabel, Louis Montaut */

#ifndef COAL_SUPPORT_DATA_H
#define COAL_SUPPORT_DATA_H

#include "coal/data_types.h"
#include "coal/collision_data.h"

namespace coal {
namespace details {

/// @brief Options for the computation of support points.
/// `NoSweptSphere` option is used when the support function is called
/// by GJK or EPA. In this case, the swept sphere radius is not taken into
/// account in the support function. It is used by GJK and EPA after they have
/// converged to correct the solution.
/// `WithSweptSphere` option is used when the support function is called
/// directly by the user. In this case, the swept sphere radius is taken into
/// account in the support function.
enum SupportOptions {
  NoSweptSphere = 0,
  WithSweptSphere = 0x1,
};

/// @brief Stores temporary data for the computation of support points.
struct ShapeSupportData {
  // @brief Tracks which points have been visited in a ConvexBase.
  std::vector<int8_t> visited;

  // @brief Tracks the last support direction used on this shape; used to
  // warm-start the ConvexBase support function.
  Vec3s last_dir = Vec3s::Zero();

  // @brief Temporary set used to compute the convex-hull of a support set.
  // Only used for ConvexBase and Box.
  std::vector<Vec2s> polygon;
};

}  // namespace details
}  // namespace coal

#endif  // COAL_SUPPORT_DATA_H
