osb/source/game/StarParticle.cpp
2023-06-20 14:33:09 +10:00

306 lines
9.7 KiB
C++

#include "StarParticle.hpp"
#include "StarAssets.hpp"
#include "StarAnimation.hpp"
#include "StarJsonExtra.hpp"
#include "StarDataStreamExtra.hpp"
#include "StarRandom.hpp"
namespace Star {
EnumMap<Particle::Type> const Particle::TypeNames{{Particle::Type::Variance, "variance"},
{Particle::Type::Ember, "ember"},
{Particle::Type::Textured, "textured"},
{Particle::Type::Animated, "animated"},
{Particle::Type::Streak, "streak"},
{Particle::Type::Text, "text"}};
EnumMap<Particle::DestructionAction> const Particle::DestructionActionNames{{Particle::DestructionAction::None, "none"},
{Particle::DestructionAction::Image, "image"},
{Particle::DestructionAction::Fade, "fade"},
{Particle::DestructionAction::Shrink, "shrink"}};
EnumMap<Particle::Layer> const Particle::LayerNames{
{Particle::Layer::Back, "back"}, {Particle::Layer::Middle, "middle"}, {Particle::Layer::Front, "front"}};
Particle::Particle() {
type = Type::Variance;
size = 0;
baseSize = 0;
color = Color::White;
light = Color::Clear;
fade = 0;
fullbright = false;
position = velocity = finalVelocity = approach = Vec2F();
rotation = 0.0f;
angularVelocity = 0.0f;
timeToLive = 0.0f;
layer = Layer::Middle;
collidesForeground = true;
collidesLiquid = true;
underwaterOnly = false;
ignoreWind = true;
length = 0;
destructionAction = DestructionAction::None;
destructionTime = 0.0f;
trail = false;
flippable = true;
flip = false;
directives = "";
}
Particle::Particle(Json const& config, String const& path) {
type = TypeNames.getLeft(config.getString("type", "variance"));
if (type == Type::Variance) {
size = 0.0f;
color = Color::Clear;
} else {
size = 1.0f;
color = Color::White;
}
size = config.getFloat("size", size);
baseSize = size;
string = config.getString(
"image", config.getString("text", config.getString("animation", config.getString("string", ""))));
if (type == Type::Textured || type == Type::Animated)
string = AssetPath::relativeTo(path, string);
if (type == Type::Animated)
initializeAnimation();
if (config.contains("color"))
color = jsonToColor(config.get("color"));
light = jsonToColor(config.get("light", JsonArray{0, 0, 0, 0}));
fade = config.getFloat("fade", 0.0f);
fullbright = config.getBool("fullbright", false);
position = jsonToVec2F(config.get("position", JsonArray{0.0f, 0.0f}));
velocity = jsonToVec2F(config.get("initialVelocity", config.get("velocity", JsonArray{0.0f, 0.0f})));
if (type == Type::Variance)
finalVelocity = {0.0f, 0.0f};
else
finalVelocity = velocity;
finalVelocity = jsonToVec2F(config.get("finalVelocity", JsonArray::from(finalVelocity)));
approach = jsonToVec2F(config.get("approach", JsonArray{0.0f, 0.0f}));
flip = config.getBool("flip", false);
flippable = config.getBool("flippable", true);
rotation = config.getFloat("rotation", 0.0f) * Constants::pi / 180.0f;
angularVelocity = config.getFloat("angularVelocity", 0.0f) * Constants::pi / 180.0f;
length = config.getFloat("length", 10.0f);
destructionAction = DestructionActionNames.getLeft(config.getString("destructionAction", "None"));
destructionImage = config.getString("destructionImage", "");
if (destructionAction == DestructionAction::Image)
destructionImage = AssetPath::relativeTo(path, destructionImage);
destructionTime = config.getFloat("destructionTime", 0.0f);
timeToLive = config.getFloat("timeToLive", 0.0f);
layer = LayerNames.getLeft(config.getString("layer", "middle"));
underwaterOnly = config.getBool("underwaterOnly", false);
collidesForeground = config.getBool("collidesForeground", layer != Layer::Front || underwaterOnly);
// only valid for collidesForeground particles
collidesLiquid = config.getBool("collidesLiquid", type == Type::Ember);
ignoreWind = config.getBool("ignoreWind", true);
trail = config.getBool("trail", false);
directives = "";
}
Json Particle::toJson() const {
return JsonObject{{"type", TypeNames.getRight(type)},
{"size", size},
{"string", string},
{"color", jsonFromColor(color)},
{"light", jsonFromColor(light)},
{"fade", fade},
{"fullbright", fullbright},
{"position", jsonFromVec2F(position)},
{"velocity", jsonFromVec2F(velocity)},
{"finalVelocity", jsonFromVec2F(finalVelocity)},
{"approach", jsonFromVec2F(approach)},
{"flip", flip},
{"flippable", flippable},
{"rotation", rotation * 180.0f / Constants::pi},
{"angularVelocity", angularVelocity * 180.0f / Constants::pi},
{"length", length},
{"destructionAction", DestructionActionNames.getRight(destructionAction)},
{"destructionImage", destructionImage},
{"destructionTime", destructionTime},
{"timeToLive", timeToLive},
{"layer", LayerNames.getRight(layer)},
{"collidesForeground", collidesForeground},
{"collidesLiquid", collidesLiquid},
{"underwaterOnly", underwaterOnly},
{"ignoreWind", ignoreWind},
{"trail", trail}};
}
void Particle::translate(Vec2F const& pos) {
position += pos;
}
void Particle::update(float dt, Vec2F const& wind) {
auto prevVelocity = velocity;
if (ignoreWind) {
velocity[0] = Star::approach<float>(finalVelocity[0], velocity[0], approach[0] * dt);
velocity[1] = Star::approach<float>(finalVelocity[1], velocity[1], approach[1] * dt);
} else {
velocity[0] = Star::approach<float>(finalVelocity[0] + wind[0], velocity[0], approach[0] * dt);
velocity[1] = Star::approach<float>(finalVelocity[1] + wind[1], velocity[1], approach[1] * dt);
}
position += (prevVelocity + velocity) * 0.5f * dt;
rotation += angularVelocity * dt;
if (light != Color::Clear)
light.fade(fade * dt);
timeToLive -= dt;
if (timeToLive < 0.0f)
destructionUpdate();
if (type == Type::Animated) {
initializeAnimation();
animation->update(dt);
}
}
bool Particle::dead() const {
return timeToLive < -destructionTime;
}
void Particle::applyVariance(Particle const& variance) {
size += variance.size * Random::randf(-1.0f, 1.0f);
position += {variance.position[0] * Random::randf(-1.0f, 1.0f), variance.position[1] * Random::randf(-1.0f, 1.0f)};
velocity += {variance.velocity[0] * Random::randf(-1.0f, 1.0f), variance.velocity[1] * Random::randf(-1.0f, 1.0f)};
finalVelocity +=
{variance.finalVelocity[0] * Random::randf(-1.0f, 1.0f), variance.finalVelocity[1] * Random::randf(-1.0f, 1.0f)};
rotation += variance.rotation * Random::randf(-1.0f, 1.0f);
angularVelocity += variance.angularVelocity * Random::randf(-1.0f, 1.0f);
length += variance.length * Random::randf(-1.0f, 1.0f);
timeToLive += variance.timeToLive * Random::randf(-1.0f, 1.0f);
}
void Particle::collide(Vec2F const& collisionPosition) {
position = collisionPosition;
approach = Vec2F();
velocity = finalVelocity = Vec2F();
destroy(true);
}
void Particle::destroy(bool withDestruction) {
if (withDestruction) {
if (timeToLive >= 0.0f) {
timeToLive = 0.0f;
destructionUpdate();
}
} else {
timeToLive = -destructionTime - 1.0f;
}
}
void Particle::destructionUpdate() {
if (destructionTime > 0) {
float destructionFactor = (timeToLive + destructionTime) / destructionTime;
if (destructionAction == DestructionAction::Shrink) {
size = baseSize * destructionFactor;
} else if (destructionAction == DestructionAction::Fade) {
color.setAlphaF(destructionFactor);
} else if (destructionAction == DestructionAction::Image) {
size = 1.0f;
color = Color::White;
type = Particle::Type::Textured;
string = destructionImage;
angularVelocity = 0.0f;
length = 0.0f;
rotation = 0.0f;
}
}
}
void Particle::initializeAnimation() {
if (!animation) {
animation = Animation(AssetPath::removeDirectives(string));
animation->addProcessing(AssetPath::getDirectives(string));
}
}
DataStream& operator<<(DataStream& ds, Particle const& particle) {
ds.viwrite(particle.type);
ds.write(particle.size);
ds.write(particle.string);
ds.write(particle.color);
ds.write(particle.light);
ds.write(particle.fade);
ds.write(particle.position);
ds.write(particle.velocity);
ds.write(particle.finalVelocity);
ds.write(particle.approach);
ds.write(particle.rotation);
ds.write(particle.flippable);
ds.write(particle.flip);
ds.write(particle.angularVelocity);
ds.write(particle.length);
ds.viwrite(particle.destructionAction);
ds.write(particle.destructionImage);
ds.write(particle.destructionTime);
ds.write(particle.timeToLive);
ds.write(particle.layer);
ds.write(particle.collidesForeground);
ds.write(particle.collidesLiquid);
ds.write(particle.underwaterOnly);
ds.write(particle.ignoreWind);
return ds;
}
DataStream& operator>>(DataStream& ds, Particle& particle) {
ds.viread(particle.type);
ds.read(particle.size);
ds.read(particle.string);
ds.read(particle.color);
ds.read(particle.light);
ds.read(particle.fade);
ds.read(particle.position);
ds.read(particle.velocity);
ds.read(particle.finalVelocity);
ds.read(particle.approach);
ds.read(particle.rotation);
ds.read(particle.flippable);
ds.read(particle.flip);
ds.read(particle.angularVelocity);
ds.read(particle.length);
ds.viread(particle.destructionAction);
ds.read(particle.destructionImage);
ds.read(particle.destructionTime);
ds.read(particle.timeToLive);
ds.read(particle.layer);
ds.read(particle.collidesForeground);
ds.read(particle.collidesLiquid);
ds.read(particle.underwaterOnly);
ds.read(particle.ignoreWind);
return ds;
}
ParticleVariantCreator makeParticleVariantCreator(Particle particle, Particle variance) {
return [particle, variance]() -> Particle {
auto p = particle;
p.applyVariance(variance);
return p;
};
}
}