Add particles!

game/components.h

@@ -37,7 +37,69 @@ typedef struct Owner {
 } Owner;
 extern ECS_COMPONENT_DECLARE(Owner);
 
+/**********************************************************
+ * Particle components
+ *********************************************************/
 
+typedef struct EmitterAttachment {
+    ecs_entity_t baseEntity;
+    Vector2 offset;
+} EmitterAttachment;
+extern ECS_COMPONENT_DECLARE(EmitterAttachment);
+typedef struct ParticleEmitter {
+    f32 emitterElapsed;
+    f32 emitterLifetime;
+    Vector2 pos;
+
+    struct ParticleEmitterData {
+        // offset
+        Vector2 minOffset, maxOffset;
+        // startVel
+        Vector2 minStartVel, maxStartVel;
+        // endVel
+        Vector2 minEndVel, maxEndVel;
+        // startSize
+        f32 minStartSize, maxStartSize;
+        // endSize
+        f32 minEndSize, maxEndSize;
+        // startRotSpeed
+        f32 minStartRotSpeed, maxStartRotSpeed;
+        // endRotSpeed
+        f32 minEndRotSpeed, maxEndRotSpeed;
+        // startColor
+        Color minStartColor, maxStartColor;
+        // endColor
+        Color minEndColor, maxEndColor;
+        // lifetime
+        f32 minLifetime, maxLifetime;
+
+        BlendMode blend;
+        BzTileID tileID;
+    } data;
+
+    ecs_entity_t targetParticles; // ParticleLayer0 / ParticleLayer1
+} ParticleEmitter;
+extern ECS_COMPONENT_DECLARE(ParticleEmitter);
+
+typedef struct Particle {
+    Vector2 pos;
+    f32 rotation;
+    const Vector2 startVel, endVel;
+    const f32 startSize, endSize;
+    const f32 startRotSpeed, endRotSpeed;
+    const Color startColor, endColor;
+    const BlendMode blend: 8;
+    const BzTileID tileID: 24;
+    const f32 lifetime;
+    f32 elapsed;
+} Particle;
+static_assert(sizeof(Particle) == 64, "");
+
+// 2 Separate components (Before entity, After entity), so we don't need to sort
+typedef Particle ParticleLayer0, ParticleLayer1;
+
+extern ECS_COMPONENT_DECLARE(ParticleLayer0);
+extern ECS_COMPONENT_DECLARE(ParticleLayer1);
 
 /**********************************************************
  * Movement components