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#pragma once
#include "StarJson.hpp"
#include "StarColor.hpp"
#include "StarBiMap.hpp"
#include "StarAnimation.hpp"
#include "StarAssetPath.hpp"
namespace Star {
struct Particle {
enum class Type {
// Variance is basically a null type, used only for varying other particles
// by amounts.
Variance,
Ember,
Textured,
Animated,
Streak,
Text
};
static EnumMap<Type> const TypeNames;
enum class DestructionAction {
None,
Image,
Fade,
Shrink
};
static EnumMap<DestructionAction> const DestructionActionNames;
enum class Layer {
Back,
Middle,
Front
};
static EnumMap<Layer> const LayerNames;
Particle();
// If particle is type Textured, then the image name is considered relative
// to the given asset path
explicit Particle(Json const& config, String const& assetsPath = "/");
Json toJson() const;
void translate(Vec2F const& pos);
// Updates position, velocity, rotation, and timeToLive.
void update(float dt, Vec2F const& wind = Vec2F());
bool dead() const;
// Apply random variance to this particle based on a "variance" particle that
// contains the maximum amount of variance for each field.
void applyVariance(Particle const& variance);
// Stops particle and sets time to live to 0.0 (triggering destruction)
void collide(Vec2F const& collisionPosition);
// Immediately triggers destruction of particle with / without destruction
// action
void destroy(bool withDestruction);
// Internally called by update() / collide() / destruct()
void destructionUpdate();
void initializeAnimation();
Type type;
// Defaults to 1.0, 1.0 will produce a reasonable size particle for whatever
// the type is.
float size;
float baseSize; // track the original size for shrink destruction action
// Used differently depending on the type of the particle.
String string;
AssetPath image;
DirectivesGroup directives;
Color color;
Color light;
float fade;
bool fullbright;
Vec2F position;
Vec2F velocity;
Vec2F finalVelocity;
Vec2F approach;
bool flippable;
bool flip;
float rotation;
float angularVelocity;
float length;
DestructionAction destructionAction;
AssetPath destructionImage;
float destructionTime;
bool destructionSet;
float timeToLive;
Layer layer;
bool collidesForeground;
bool collidesLiquid;
bool underwaterOnly;
bool ignoreWind;
bool trail;
Maybe<Animation> animation;
};
DataStream& operator<<(DataStream& ds, Particle const& particle);
DataStream& operator>>(DataStream& ds, Particle& particle);
typedef function<Particle()> ParticleVariantCreator;
ParticleVariantCreator makeParticleVariantCreator(Particle particle, Particle variance);
}
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