Add emission to ParticleEmitter

game/components.h

@@ -64,6 +64,11 @@ typedef struct ParticleEmitter {
     Vector2 pos;
 
     struct ParticleEmitterData {
+        // emission
+        f32 emmitRate;
+        f32 emmitVariance;
+        f32 emmitVarianceMin, emmitVarianceMax;
+
         // offset
         Vector2 minOffset, maxOffset;
         // startVel

game/main.c

@@ -567,6 +567,30 @@ static void renderGame(Game *game, float dt) {
     drawPlayerInputUI();
 
     EndMode2D();
+
+    InputState *input = ecs_singleton_get_mut(ECS, InputState);
+    if (IsKeyReleased(KEY_SPACE)) {
+        ParticleEmitter emitter = {
+                .emitterLifetime = 2.0f,
+                .targetParticles = ecs_id(ParticleLayer1),
+                .data.emmitRate = 1.2f,
+                .data.emmitVariance = 1.0f,
+                .data.emmitVarianceMin = 0.0f,
+                .data.emmitVarianceMax = 1.0f,
+                .pos = input->mouseWorld,
+                .data.startColor = { 210, 0, 0, 210 },
+                .data.endColor = { 110, 10, 10, 110 },
+                .data.minLifetime = 1.0f,
+                .data.maxLifetime = 2.2f,
+                .data.minStartSize = 4.0f,
+                .data.maxStartSize = 6.0f,
+                .data.tileID = getParticleTypeTile(PARTICLE_CIRCLE),
+                .data.blend = BLEND_ADDITIVE
+        };
+        ecs_entity_t e = entityCreateEmpty();
+        ecs_set_ptr(ECS, e, ParticleEmitter, &emitter);
+
+    }
 }
 
 void render(float dt, void *userData) {

game/systems/s_animation.c

@@ -2,6 +2,7 @@
 
 #include "../game_state.h"
 #include "../utils.h"
+#include "../entity_factory.h"
 
 #include <raymath.h>
 #include <stdlib.h>
@@ -57,13 +58,21 @@ void updateParticleEmitter(ecs_iter_t *it) {
         ecs_entity_t entity = it->entities[i];
         if (ecs_has(ECS, entity, EmitterAttachment)) {
             EmitterAttachment attachment = *ecs_get(ECS, entity, EmitterAttachment);
-            if (!ecs_is_alive(ECS, attachment.baseEntity)) {
-                ecs_delete(ECS, entity);
-                continue;
-            }
+            if (ecs_is_alive(ECS, attachment.baseEntity)) {
                 Vector2 pos = *ecs_get(ECS, entity, Position);
                 pos = Vector2Add(pos, attachment.offset);
-            emitter->pos = pos;
+                emitter[i].pos = pos;
+            }
+        }
+
+        const struct ParticleEmitterData data = emitter[i].data;
+
+        i32 emmit = data.emmitRate + data.emmitVariance * randFloatRange(data.emmitVarianceMin, data.emmitVarianceMax);
+        for (i32 pIdx = 0; pIdx < emmit; pIdx++) {
+            ecs_entity_t pEntity = entityCreateEmpty();
+            ecs_set_ptr(ECS, pEntity, ParticleLayer0, NULL);
+            Particle particle = spawnParticle(&emitter[i]);
+            ecs_set_id(ECS, pEntity, emitter[i].targetParticles, sizeof(particle), &particle);
         }
 
         emitter[i].emitterElapsed += dt;

game/systems/systems.c

@@ -192,6 +192,8 @@ void setupSystems() {
     ECS_SYSTEM(ECS, renderHealthBar, EcsOnUpdate, Position, HitBox, Health);
     ECS_SYSTEM(ECS, renderFloatyTextParticle, EcsOnUpdate, FloatyTextParticle);
 
+    ECS_SYSTEM(ECS, updateParticleEmitter, EcsOnUpdate, ParticleEmitter);
+
     ECS_SYSTEM(ECS, renderDebugPath, EcsOnUpdate, Path);
 
     ECS_SYSTEM(ECS, renderColliders, EcsOnUpdate, Position, HitBox);