add ParticlesPreset

src/graphics/render/Emitter.cpp

@@ -23,7 +23,7 @@ Emitter::Emitter(
       texture(texture),
       spawnInterval(spawnInterval),
       count(count),
-      behaviour() {
+      preset() {
     this->prototype.emitter = this;
 }
 
@@ -47,6 +47,7 @@ void Emitter::update(
             position = entity->getTransform().pos;
         }
     }
+    const float maxDistance = preset.maxDistance;
     if (glm::distance2(position, cameraPosition) > maxDistance * maxDistance) {
         if (count > 0) {
             if (spawnInterval < FLT_EPSILON) {

src/graphics/render/Emitter.hpp

@@ -8,6 +8,7 @@
 
 #include "maths/UVRegion.hpp"
 #include "maths/util.hpp"
+#include "presets/ParticlesPreset.hpp"
 
 class Level;
 class Emitter;
@@ -30,12 +31,6 @@ struct Particle {
 
 class Texture;
 
-struct ParticleBehaviour {
-    bool collision = true;
-    bool lighting = true;
-    glm::vec3 gravity {0.0f, -16.0f, 0.0f};
-};
-
 class Emitter {
     const Level& level;
     /// @brief Static position or entity
@@ -54,12 +49,10 @@ class Emitter {
     float timer = 0.0f;
     /// @brief Random velocity magnitude applying to spawned particles.
     glm::vec3 explosion {8.0f};
-    /// @brief Max distance of actually spawning particles.
-    float maxDistance = 32.0f;
 
     util::PseudoRandom random;
 public:
-    ParticleBehaviour behaviour;
+    ParticlesPreset preset;
 
     Emitter(
         const Level& level,

src/graphics/render/ParticlesRenderer.cpp

@@ -35,12 +35,12 @@ ParticlesRenderer::~ParticlesRenderer() = default;
 static inline void update_particle(
     Particle& particle, float delta, const Chunks& chunks
 ) {
-    const auto& behave = particle.emitter->behaviour;
+    const auto& preset = particle.emitter->preset;
     auto& pos = particle.position;
     auto& vel = particle.velocity;
 
-    vel += delta * behave.gravity;
-    if (behave.collision && chunks.isObstacleAt(pos + vel * delta)) {
+    vel += delta * preset.acceleration;
+    if (preset.collision && chunks.isObstacleAt(pos + vel * delta)) {
         vel *= 0.0f;
     }
     pos += vel * delta;
@@ -72,7 +72,7 @@ void ParticlesRenderer::renderParticles(const Camera& camera, float delta) {
             update_particle(particle, delta, chunks);
 
             glm::vec4 light(1, 1, 1, 0);
-            if (particle.emitter->behaviour.lighting) {
+            if (particle.emitter->preset.lighting) {
                 light = MainBatch::sampleLight(
                     particle.position, chunks, backlight
                 );