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/* Effect.h
Copyright (c) 2014 by Michael Zahniser
Endless Sky is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later version.
Endless Sky is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include "audio/SoundCategory.h"
#include "Angle.h"
#include "Body.h"
#include <string>
class DataNode;
class Sound;
// Class representing the template for a visual effect such as an explosion,
// which is drawn for effect but has no impact on any other objects in the
// game. Because this class is more heavyweight than it needs to be, actual
// visual effects when they are placed use the Visual class, based on the
// template provided by an Effect.
class Effect : public Body {
public:
// Functions provided by the Body base class:
// Frame GetFrame(int step = -1) const;
// const Point &Position() const;
// const Point &Velocity() const;
// const Angle &Facing() const;
// Point Unit() const;
// double Zoom() const;
const std::string &TrueName() const;
void SetTrueName(const std::string &name);
void Load(const DataNode &node);
private:
std::string trueName;
const Sound *sound = nullptr;
SoundCategory soundCategory = SoundCategory::EXPLOSION;
// Parameters used for randomizing spin and velocity. The random angle is
// added to the parent angle, and then a random velocity in that direction
// is added to the parent velocity.
double velocityScale = 1.;
double randomVelocity = 0.;
double randomAngle = 0.;
double randomSpin = 0.;
double randomFrameRate = 0.;
// Absolute values are independent of the parent Body if specified.
Angle absoluteAngle;
bool hasAbsoluteAngle = false;
double absoluteVelocity = 0.;
bool hasAbsoluteVelocity = false;
int lifetime = 0;
int randomLifetime = 0;
// If set, this effect's scale can be modified based on the "zoom" of the object it is used on.
// For example, engine points for afterburner effects.
bool inheritsZoom = false;
// Allow the Visual class to access all these private members.
friend class Visual;
};
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