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// This file contains the declaration of class Matrix4Composition.

#ifndef O3D_CORE_CROSS_MATRIX4_COMPOSITION_H_
#define O3D_CORE_CROSS_MATRIX4_COMPOSITION_H_

#include "core/cross/param_object.h"
#include "core/cross/param.h"
#include "core/cross/param_cache.h"
#include "core/cross/types.h"

namespace o3d {

// Operation to hold a local transformation matrix and (if bound) compose it
// with its parent transformation matrix.
class Matrix4Composition : public ParamObject {
 public:
  typedef SmartPointer<Matrix4Composition> Ref;
  typedef WeakPointer<Matrix4Composition> WeakPointerType;

  static const char* kInputMatrixParamName;
  static const char* kLocalMatrixParamName;
  static const char* kOutputMatrixParamName;

  Matrix4 input_matrix() const {
    return input_matrix_param_->value();
  }

  void set_input_matrix(const Matrix4& input_matrix) {
    input_matrix_param_->set_value(input_matrix);
  }

  Matrix4 local_matrix() const {
    return local_matrix_param_->value();
  }

  void set_local_matrix(const Matrix4& axis) {
    local_matrix_param_->set_value(axis);
  }

  Matrix4 output_matrix() const {
    return output_matrix_param_->value();
  }

  void UpdateOutputs();

 private:
  typedef SlaveParam<ParamMatrix4, Matrix4Composition> SlaveParamMatrix4;

  explicit Matrix4Composition(ServiceLocator* service_locator);

  friend class IClassManager;
  static ObjectBase::Ref Create(ServiceLocator* service_locator);

  ParamMatrix4::Ref input_matrix_param_;
  ParamMatrix4::Ref local_matrix_param_;
  SlaveParamMatrix4::Ref output_matrix_param_;

  O3D_DECL_CLASS(Matrix4Composition, ParamObject);
  DISALLOW_COPY_AND_ASSIGN(Matrix4Composition);
};
}  // namespace o3d

#endif  // O3D_CORE_CROSS_MATRIX4_COMPOSITION_H_