feat(campfire): add particle effects for campfire

assets/prefabs/blocks/CampFire.prefab

@@ -9,5 +9,6 @@
     "paragraphText": [
       "The camp fire lights up a bigger area than just a torch."
     ]
-  }
+  },
+  "Campfire": {}
 }

assets/prefabs/particles/flames.prefab

@@ -0,0 +1,27 @@
+{
+  "location": {},
+  "particleDataSprite": {
+    "texture": "ManualLabor:fx_flame"
+  },
+  "energyRangeGenerator": {
+    "minEnergy": 0.5,
+    "maxEnergy": 2
+  },
+  "scaleRangeGenerator": {
+    "minScale": [0.01, 0.01, 0.01],
+    "maxScale": [0.5, 0.5, 0.5]
+  },
+  "velocityRangeGenerator": {
+    "minVelocity": [0, 0.5, 0],
+    "maxVelocity": [0.4, 2, 0.4]
+  },
+  "velocityAffector": {},
+  "particleEmitter": {
+    "spawnRateMax": 20,
+    "spawnRateMin": 10,
+    "maxParticles": 100,
+    "particleCollision": false,
+    "destroyEntityWhenDead": true
+  },
+  "network": {}
+}

assets/prefabs/particles/smoke.prefab

@@ -0,0 +1,27 @@
+{
+  "location": {},
+  "particleDataSprite": {
+    "texture": "ManualLabor:fx_smoke"
+  },
+  "energyRangeGenerator": {
+    "minEnergy": 0.5,
+    "maxEnergy": 4
+  },
+  "scaleRangeGenerator": {
+    "minScale": [0.01, 0.01, 0.01],
+    "maxScale": [0.5, 0.5, 0.5]
+  },
+  "velocityRangeGenerator": {
+    "minVelocity": [0, 0.3, 0],
+    "maxVelocity": [0.4, 1, 0.4]
+  },
+  "velocityAffector": {},
+  "particleEmitter": {
+    "spawnRateMax": 20,
+    "spawnRateMin": 10,
+    "maxParticles": 100,
+    "particleCollision": false,
+    "destroyEntityWhenDead": true
+  },
+  "network": {}
+}

src/main/java/org/terasology/manualLabor/particles/CampfireComponent.java

@@ -0,0 +1,18 @@
+// Copyright 2020 The Terasology Foundation
+// SPDX-License-Identifier: Apache-2.0
+
+package org.terasology.manualLabor.particles;
+
+import org.terasology.entitySystem.Component;
+import org.terasology.entitySystem.Owns;
+import org.terasology.entitySystem.entity.EntityRef;
+
+public class CampfireComponent implements Component {
+    @Owns
+    EntityRef flameEmitter = EntityRef.NULL;
+    @Owns
+    EntityRef smokeEmitter = EntityRef.NULL;
+    @Owns
+    EntityRef lightEmitter = EntityRef.NULL;
+
+}

src/main/java/org/terasology/manualLabor/particles/CampfireParticleSystem.java

@@ -0,0 +1,57 @@
+// Copyright 2020 The Terasology Foundation
+// SPDX-License-Identifier: Apache-2.0
+
+package org.terasology.manualLabor.particles;
+
+import org.joml.Vector3f;
+import org.terasology.entitySystem.entity.EntityBuilder;
+import org.terasology.entitySystem.entity.EntityManager;
+import org.terasology.entitySystem.entity.EntityRef;
+import org.terasology.entitySystem.entity.lifecycleEvents.BeforeDeactivateComponent;
+import org.terasology.entitySystem.entity.lifecycleEvents.OnAddedComponent;
+import org.terasology.entitySystem.event.ReceiveEvent;
+import org.terasology.entitySystem.systems.BaseComponentSystem;
+import org.terasology.entitySystem.systems.RegisterMode;
+import org.terasology.entitySystem.systems.RegisterSystem;
+import org.terasology.logic.location.LocationComponent;
+import org.terasology.particles.components.ParticleEmitterComponent;
+import org.terasology.registry.In;
+import org.terasology.world.block.BlockComponent;
+
+@RegisterSystem(RegisterMode.ALWAYS)
+public class CampfireParticleSystem extends BaseComponentSystem {
+
+    @In
+    EntityManager entityManager;
+
+    @ReceiveEvent(components = {BlockComponent.class})
+    public void onActivate(OnAddedComponent event, EntityRef entity, LocationComponent location,
+                           CampfireComponent campfire) {
+        Vector3f loc = location.getWorldPosition(new Vector3f());
+        campfire.flameEmitter = createEmitter(entity, loc, "ManualLabor:flames");
+        loc.add(0, 1, 0);
+        campfire.smokeEmitter = createEmitter(entity, loc, "ManualLabor:smoke");
+        entity.saveComponent(campfire);
+    }
+
+    @ReceiveEvent
+    public void onDestroy(BeforeDeactivateComponent event, EntityRef entity, CampfireComponent campfire) {
+        campfire.smokeEmitter.destroy();
+        campfire.flameEmitter.destroy();
+        campfire.lightEmitter.destroy();
+    }
+
+    private EntityRef createEmitter(EntityRef entity, Vector3f location, String prefabName) {
+        EntityBuilder builder = entityManager.newBuilder(prefabName);
+        builder.updateComponent(LocationComponent.class, l -> {
+            l.setWorldPosition(new Vector3f(location));
+            return l;
+        });
+        builder.updateComponent(ParticleEmitterComponent.class, emitter -> {
+            emitter.ownerEntity = entity;
+            return emitter;
+        });
+        builder.setOwner(entity);
+        return builder.build();
+    }
+}